Merge branch 'ready-for-upstream'

This is the branch thicket of patches in Git for Windows that are
considered ready for upstream. To keep them in a ready-to-submit shape,
they are kept as close to the beginning of the branch thicket as
possible.

.github/workflows/git-artifacts.yml

@@ -0,0 +1,567 @@
+name: git-artifacts
+
+on:
+  # This workflow can be triggered manually in the Actions tab, see
+  # https://github.blog/changelog/2020-07-06-github-actions-manual-triggers-with-workflow_dispatch/
+  workflow_dispatch:
+    inputs:
+      build_only:
+        description: 'Optionally restrict what artifacts to build'
+      ref:
+        description: 'Optionally override which branch to build'
+      repository:
+        description: 'Optionally override from where to fetch the specified ref'
+
+env:
+  GPG_OPTIONS: "--batch --yes --no-tty --list-options no-show-photos --verify-options no-show-photos --pinentry-mode loopback"
+  HOME: "${{github.workspace}}\\home"
+  MSYSTEM: MINGW64
+  USERPROFILE: "${{github.workspace}}\\home"
+  BUILD_ONLY: "${{github.event.inputs.build_only}}"
+  REPOSITORY: "${{github.event.inputs.repository}}"
+  REF: "${{github.event.inputs.ref}}"
+
+jobs:
+  bundle-artifacts:
+    runs-on: windows-latest
+    outputs:
+      latest-sdk64-extra-build-id: ${{ steps.determine-latest-sdk64-extra-build-id.outputs.id }}
+    steps:
+      - name: Configure user
+        shell: bash
+        run:
+          USER_NAME="${{github.actor}}" &&
+          USER_EMAIL="${{github.actor}}@users.noreply.github.com" &&
+          mkdir "$HOME" &&
+          git config --global user.name "$USER_NAME" &&
+          git config --global user.email "$USER_EMAIL" &&
+          echo "PACKAGER=$USER_NAME <$USER_EMAIL>" >>$GITHUB_ENV
+      - name: Determine latest git-sdk-64-extra-artifacts build ID
+        id: determine-latest-sdk64-extra-build-id
+        shell: bash
+        run: |
+          urlbase=https://dev.azure.com/git-for-windows/git/_apis/build/builds
+          id=$(curl "$urlbase?definitions=29&statusFilter=completed&resultFilter=succeeded&\$top=1" |
+            jq -r '.value[0].id')
+
+          echo "Latest ID is ${id}"
+          echo "::set-output name=id::$id"
+      - name: Cache git-sdk-64-build-installers
+        id: cache-sdk-build-installers
+        uses: actions/cache@v2
+        with:
+          path: git-sdk-64-build-installers
+          key: build-installers-64-${{ steps.determine-latest-sdk64-extra-build-id.outputs.id }}
+      - name: Download git-sdk-64-build-installers
+        if: steps.cache-sdk-build-installers.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          # Use Git Bash to download and unpack the artifact
+
+          ## Get artifact
+          urlbase=https://dev.azure.com/git-for-windows/git/_apis/build/builds
+          id=${{ steps.determine-latest-sdk64-extra-build-id.outputs.id }}
+          download_url=$(curl "$urlbase/$id/artifacts" |
+            jq -r '.value[] | select(.name == "git-sdk-64-build-installers").resource.downloadUrl')
+
+          curl -o artifacts.zip "$download_url"
+
+          ## Unpack artifact
+          unzip artifacts.zip
+      - name: Clone build-extra
+        shell: bash
+        run: |
+          d=git-sdk-64-build-installers/usr/src/build-extra &&
+          if test ! -d $d/.git
+          then
+            git clone --single-branch -b main https://github.com/git-for-windows/build-extra $d
+          else
+            git -C $d fetch https://github.com/git-for-windows/build-extra main &&
+            git -C $d switch -C main FETCH_HEAD
+          fi
+      - name: Prepare home directory for GPG signing
+        if: env.GPGKEY != ''
+        shell: bash
+        run: |
+          echo '${{secrets.PRIVGPGKEY}}' | tr % '\n' | gpg $GPG_OPTIONS --import &&
+          mkdir -p home &&
+          git config --global gpg.program "$PWD/git-sdk-64-build-installers/usr/src/build-extra/gnupg-with-gpgkey.sh" &&
+          info="$(gpg --list-keys --with-colons "${GPGKEY%% *}" | cut -d : -f 1,10 | sed -n '/^uid/{s|uid:||p;q}')" &&
+          git config --global user.name "${info% <*}" &&
+          git config --global user.email "<${info#*<}"
+        env:
+          GPGKEY: ${{secrets.GPGKEY}}
+      - name: Generate bundle artifacts
+        env:
+          GPGKEY: ${{secrets.GPGKEY}}
+        shell: powershell
+        run: |
+          & .\git-sdk-64-build-installers\git-cmd.exe --command=usr\bin\bash.exe -lc @"
+            printf '#!/bin/sh\n\nexec /mingw64/bin/git.exe "`$@"\n' >/usr/bin/git &&
+            mkdir -p bundle-artifacts &&
+
+            { test -n \"`$REPOSITORY\" || REPOSITORY='${{github.repository}}'; } &&
+            { test -n \"`$REF\" || REF='${{github.ref}}'; } &&
+            git -c init.defaultBranch=main init --bare &&
+            git remote add -f origin https://github.com/git-for-windows/git &&
+            git fetch \"https://github.com/`$REPOSITORY\" \"`$REF:`$REF\" &&
+
+            tag_name=\"`$(git describe --match 'v[0-9]*' FETCH_HEAD)-`$(date +%Y%m%d%H%M%S)\" &&
+            echo \"prerelease-`${tag_name#v}\" >bundle-artifacts/ver &&
+            echo \"`${tag_name#v}\" >bundle-artifacts/display_version &&
+            echo \"`$tag_name\" >bundle-artifacts/next_version &&
+            git tag `$(test -z \"`$GPGKEY\" || echo \" -s\") -m \"Snapshot build\" \"`$tag_name\" FETCH_HEAD &&
+            git bundle create bundle-artifacts/git.bundle origin/main..\"`$tag_name\" &&
+
+            sh -x /usr/src/build-extra/please.sh mention feature \"Snapshot of `$(git show -s  --pretty='tformat:%h (%s, %ad)' --date=short FETCH_HEAD)\" &&
+            git -C /usr/src/build-extra bundle create \"`$PWD/bundle-artifacts/build-extra.bundle\" origin/main..main
+          "@
+      - name: Clean up temporary files
+        if: always()
+        shell: bash
+        run: rm -rf home
+      - name: 'Publish Pipeline Artifact: bundle-artifacts'
+        uses: actions/upload-artifact@v1
+        with:
+          name: bundle-artifacts
+          path: bundle-artifacts
+  pkg:
+    runs-on: windows-latest
+    needs: bundle-artifacts
+    outputs:
+      latest-sdk64-extra-build-id: ${{ needs.bundle-artifacts.outputs.latest-sdk64-extra-build-id }}
+    strategy:
+      matrix:
+        arch:
+          - name: x86_64
+            bitness: 64
+            bin: /amd64
+          - name: i686
+            bitness: 32
+            bin: ''
+    steps:
+      - name: Configure user
+        shell: bash
+        run:
+          USER_NAME="${{github.actor}}" &&
+          USER_EMAIL="${{github.actor}}@users.noreply.github.com" &&
+          mkdir "$HOME" &&
+          git config --global user.name "$USER_NAME" &&
+          git config --global user.email "$USER_EMAIL" &&
+          echo "PACKAGER=$USER_NAME <$USER_EMAIL>" >>$GITHUB_ENV
+      - name: Cache git-sdk-64-build-installers
+        id: cache-sdk-build-installers
+        uses: actions/cache@v2
+        with:
+          path: git-sdk-64-build-installers
+          key: build-installers-64-${{ needs.bundle-artifacts.outputs.latest-sdk64-extra-build-id }}
+      - name: Download git-sdk-64-build-installers
+        if: steps.cache-sdk-build-installers.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          # Use Git Bash to download and unpack the artifact
+
+          ## Get artifact
+          urlbase=https://dev.azure.com/git-for-windows/git/_apis/build/builds
+          id=${{ needs.pkg.outputs.latest-sdk64-extra-build-id }}
+          download_url=$(curl "$urlbase/$id/artifacts" |
+            jq -r '.value[] | select(.name == "git-sdk-64-build-installers").resource.downloadUrl')
+
+          curl -o artifacts.zip "$download_url"
+
+          ## Unpack artifact
+          unzip artifacts.zip
+      - name: Download bundle-artifacts
+        uses: actions/download-artifact@v1
+        with:
+          name: bundle-artifacts
+          path: bundle-artifacts
+      - name: Clone and update build-extra
+        shell: bash
+        run: |
+          d=git-sdk-64-build-installers/usr/src/build-extra &&
+          if test ! -d $d/.git
+          then
+            git clone --single-branch -b main https://github.com/git-for-windows/build-extra $d
+          else
+            git -C $d fetch https://github.com/git-for-windows/build-extra main &&
+            git -C $d switch -C main FETCH_HEAD
+          fi &&
+          git -C $d pull "$PWD"/bundle-artifacts/build-extra.bundle main
+      - name: Check out git/git
+        shell: bash
+        run: |
+          git -c init.defaultBranch=main init &&
+          git remote add -f origin https://github.com/git-for-windows/git &&
+          git fetch --tags bundle-artifacts/git.bundle $(cat bundle-artifacts/next_version) &&
+          git reset --hard $(cat bundle-artifacts/next_version)
+      - name: Prepare home directory for code-signing
+        env:
+          CODESIGN_P12: ${{secrets.CODESIGN_P12}}
+          CODESIGN_PASS: ${{secrets.CODESIGN_PASS}}
+        if: env.CODESIGN_P12 != '' && env.CODESIGN_PASS != ''
+        shell: bash
+        run: |
+          cd home &&
+          mkdir -p .sig &&
+          echo -n "$CODESIGN_P12" | tr % '\n' | base64 -d >.sig/codesign.p12 &&
+          echo -n "$CODESIGN_PASS" >.sig/codesign.pass
+          git config --global alias.signtool '!sh "/usr/src/build-extra/signtool.sh"'
+      - name: Prepare home directory for GPG signing
+        if: env.GPGKEY != ''
+        shell: bash
+        run: |
+          echo '${{secrets.PRIVGPGKEY}}' | tr % '\n' | gpg $GPG_OPTIONS --import &&
+          info="$(gpg --list-keys --with-colons "${GPGKEY%% *}" | cut -d : -f 1,10 | sed -n '/^uid/{s|uid:||p;q}')" &&
+          git config --global user.name "${info% <*}" &&
+          git config --global user.email "<${info#*<}"
+        env:
+          GPGKEY: ${{secrets.GPGKEY}}
+      - name: Build mingw-w64-${{matrix.arch.name}}-git
+        env:
+          GPGKEY: "${{secrets.GPGKEY}}"
+        shell: powershell
+        run: |
+          & git-sdk-64-build-installers\usr\bin\sh.exe -lc @"
+            set -x
+            # Let `cv2pdb` find the DLLs
+            PATH=\"`$PATH:/C/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin${{matrix.arch.bin}}\"
+            type -p mspdb140.dll || exit 1
+            sh -x /usr/src/build-extra/please.sh build-mingw-w64-git --only-${{matrix.arch.bitness}}-bit --build-src-pkg -o artifacts HEAD &&
+            cp bundle-artifacts/ver artifacts/ &&
+            if test -n \"`$GPGKEY\"
+            then
+              for tar in artifacts/*.tar*
+              do
+                /usr/src/build-extra/gnupg-with-gpgkey.sh --detach-sign --no-armor `$tar
+              done
+            fi &&
+
+            b=`$PWD/artifacts &&
+            version=`$(cat bundle-artifacts/next_version) &&
+            (cd /usr/src/MINGW-packages/mingw-w64-git &&
+            cp PKGBUILD.`$version PKGBUILD &&
+            git commit -s -m \"mingw-w64-git: new version (`$version)\" PKGBUILD &&
+            git bundle create \"`$b\"/MINGW-packages.bundle origin/main..main)
+          "@
+      - name: Clean up temporary files
+        if: always()
+        shell: bash
+        run: rm -rf home
+      - name: Publish mingw-w64-${{matrix.arch.name}}-git
+        uses: actions/upload-artifact@v1
+        with:
+          name: pkg-${{matrix.arch.name}}
+          path: artifacts
+  build-arm64:
+    needs: bundle-artifacts
+    runs-on: windows-latest
+    steps:
+    - name: Configure user
+      shell: bash
+      run:
+        USER_NAME="${{github.actor}}" &&
+        USER_EMAIL="${{github.actor}}@users.noreply.github.com" &&
+        mkdir -p "$HOME" &&
+        git config --global user.name "$USER_NAME" &&
+        git config --global user.email "$USER_EMAIL"
+    - uses: actions/checkout@v2
+    - name: initialize vcpkg
+      uses: actions/checkout@v2
+      with:
+        repository: 'microsoft/vcpkg'
+        path: 'compat/vcbuild/vcpkg'
+    - name: download vcpkg artifacts
+      shell: powershell
+      run: |
+        $urlbase = "https://dev.azure.com/git/git/_apis/build/builds"
+        $id = ((Invoke-WebRequest -UseBasicParsing "${urlbase}?definitions=9&statusFilter=completed&resultFilter=succeeded&`$top=1").content | ConvertFrom-JSON).value[0].id
+        $downloadUrl = ((Invoke-WebRequest -UseBasicParsing "${urlbase}/$id/artifacts").content | ConvertFrom-JSON).value[0].resource.downloadUrl
+        (New-Object Net.WebClient).DownloadFile($downloadUrl, "compat.zip")
+        Expand-Archive compat.zip -DestinationPath . -Force
+        Remove-Item compat.zip
+    - name: add msbuild to PATH
+      uses: microsoft/setup-msbuild@v1
+    - name: copy dlls to root
+      shell: powershell
+      run: |
+        & compat\vcbuild\vcpkg_copy_dlls.bat release arm64-windows
+        if (!$?) { exit(1) }
+    - name: generate Visual Studio solution
+      shell: bash
+      run: |
+        cmake `pwd`/contrib/buildsystems/ -DCMAKE_PREFIX_PATH=`pwd`/compat/vcbuild/vcpkg/installed/arm64-windows \
+        -DNO_GETTEXT=YesPlease -DPERL_TESTS=OFF -DPYTHON_TESTS=OFF -DCURL_NO_CURL_CMAKE=ON -DCMAKE_GENERATOR_PLATFORM=arm64 -DVCPKG_ARCH=arm64-windows \
+        -DCMAKE_INSTALL_PREFIX="`pwd`/git-arm64"
+    - name: MSBuild
+      run: msbuild git.sln -property:Configuration=Release
+    - name: Link the Git executables
+      run: msbuild INSTALL.vcxproj -property:Configuration=Release
+    - name: upload build artifacts
+      uses: actions/upload-artifact@v1
+      with:
+        name: arm64-artifacts
+        path: ./git-arm64
+  artifacts:
+    runs-on: windows-latest
+    needs: [pkg, build-arm64]
+    strategy:
+      matrix:
+        artifact:
+          - name: installer
+          - name: portable
+            fileprefix: PortableGit
+            fileextension: exe
+          - name: archive
+            fileprefix: Git
+            fileextension: tar.bz2
+          - name: mingit
+            fileprefix: MinGit
+            fileextension: zip
+          - name: mingit-busybox
+            fileprefix: MinGit
+            fileextension: zip
+        arch:
+          - name: x86_64
+            bitness: 64
+            arm64: false
+          - name: i686
+            bitness: 32
+            arm64: false
+          - name: i686
+            bitness: 32
+            arm64: true
+      fail-fast: false
+    env:
+      MSYSTEM: MINGW${{matrix.arch.bitness}}
+    steps:
+      - name: Determine whether this job should be skipped
+        shell: bash
+        run: |
+          case " $BUILD_ONLY " in
+          '  ') ;; # not set; build all
+          *" ${{matrix.artifact.name}} "*|*" ${{matrix.artifact.name}}-${{matrix.arch.name}} "*) ;; # build this artifact
+          *) echo "SKIP=true" >>$GITHUB_ENV;;
+          esac
+      - name: Download pkg-${{matrix.arch.name}}
+        if: env.SKIP != 'true'
+        uses: actions/download-artifact@v1
+        with:
+          name: pkg-${{matrix.arch.name}}
+          path: pkg-${{matrix.arch.name}}
+      - name: Download bundle-artifacts
+        if: env.SKIP != 'true'
+        uses: actions/download-artifact@v1
+        with:
+          name: bundle-artifacts
+          path: bundle-artifacts
+      - name: Cache git-sdk-64-build-installers
+        if: env.SKIP != 'true' && matrix.arch.bitness == '64'
+        id: cache-sdk64-build-installers
+        uses: actions/cache@v2
+        with:
+          path: git-sdk-64-build-installers
+          key: build-installers-64-${{ needs.pkg.outputs.latest-sdk64-extra-build-id }}
+      - name: Download git-sdk-64-build-installers
+        if: env.SKIP != 'true' && matrix.arch.bitness == '64' && steps.cache-sdk64-build-installers.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          # Use Git Bash to download and unpack the artifact
+
+          ## Get artifact
+          urlbase=https://dev.azure.com/git-for-windows/git/_apis/build/builds
+          id=${{ needs.pkg.outputs.latest-sdk64-extra-build-id }}
+          download_url="$(curl "$urlbase/$id/artifacts" |
+            jq -r '.value[] | select(.name == "git-sdk-64-build-installers").resource.downloadUrl')"
+
+          curl -o artifacts.zip "$download_url"
+
+          ## Unpack artifact
+          unzip artifacts.zip
+      - name: Determine latest git-sdk-32-extra-artifacts build ID
+        if: env.SKIP != 'true' && matrix.arch.bitness == '32'
+        id: determine-latest-sdk32-extra-build-id
+        shell: bash
+        run: |
+          urlbase=https://dev.azure.com/git-for-windows/git/_apis/build/builds
+          id=$(curl "$urlbase?definitions=30&statusFilter=completed&resultFilter=succeeded&\$top=1" |
+            jq -r '.value[0].id')
+
+          echo "Latest ID is ${id}"
+          echo "::set-output name=id::$id"
+      - name: Cache git-sdk-32-build-installers
+        if: env.SKIP != 'true' && matrix.arch.bitness == '32'
+        id: cache-sdk32-build-installers
+        uses: actions/cache@v2
+        with:
+          path: git-sdk-32-build-installers
+          key: build-installers-32-${{ steps.determine-latest-sdk32-extra-build-id.outputs.id }}
+      - name: Download git-sdk-32-build-installers
+        if: env.SKIP != 'true' && matrix.arch.bitness == '32' && steps.cache-sdk32-build-installers.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          # Use Git Bash to download and unpack the artifact
+
+          ## Get artifact
+          urlbase=https://dev.azure.com/git-for-windows/git/_apis/build/builds
+          id=${{ steps.determine-latest-sdk32-extra-build-id.outputs.id }}
+          download_url=$(curl "$urlbase/$id/artifacts" |
+            jq -r '.value[] | select(.name == "git-sdk-32-build-installers").resource.downloadUrl')
+
+          curl -o artifacts.zip "$download_url"
+
+          ## Unpack artifact
+          unzip artifacts.zip
+      - name: Download arm64 artifact
+        if: matrix.arch.arm64 == true
+        uses: actions/download-artifact@v1
+        with:
+          name: arm64-artifacts
+          path: ${{github.workspace}}/arm64
+      - name: Clone and update build-extra
+        if: env.SKIP != 'true'
+        shell: bash
+        run: |
+          d=git-sdk-${{matrix.arch.bitness}}-build-installers/usr/src/build-extra &&
+          if test ! -d $d/.git
+          then
+            git clone --single-branch -b main https://github.com/git-for-windows/build-extra $d
+          else
+            git -C $d fetch https://github.com/git-for-windows/build-extra main &&
+            git -C $d switch -C main FETCH_HEAD
+          fi &&
+          git -C $d pull "$PWD"/bundle-artifacts/build-extra.bundle main
+      - name: Prepare home directory for code-signing
+        env:
+          CODESIGN_P12: ${{secrets.CODESIGN_P12}}
+          CODESIGN_PASS: ${{secrets.CODESIGN_PASS}}
+        if: env.SKIP != 'true' && (matrix.artifact.name == 'installer' || matrix.artifact.name == 'portable') && env.CODESIGN_P12 != '' && env.CODESIGN_PASS != ''
+        shell: bash
+        run: |
+          mkdir -p home/.sig &&
+          echo -n "$CODESIGN_P12" | tr % '\n' | base64 -d >home/.sig/codesign.p12 &&
+          echo -n "$CODESIGN_PASS" >home/.sig/codesign.pass &&
+          git config --global alias.signtool '!sh "/usr/src/build-extra/signtool.sh"'
+      - name: Build ${{matrix.arch.bitness}}-bit ${{matrix.artifact.name}}
+        if: env.SKIP != 'true'
+        shell: powershell
+        run: |
+          & .\git-sdk-${{matrix.arch.bitness}}-build-installers\usr\bin\bash.exe -lc @"
+            set -x
+            [[ \"${{matrix.arch.arm64}}\" = true ]] && ARM64=\"--include-arm64-artifacts=\\\"`$PWD/arm64\\\"\" || ARM64=
+            /usr/src/build-extra/please.sh make_installers_from_mingw_w64_git `$ARM64 --version=`$(cat pkg-${{matrix.arch.name}}/ver) -o artifacts --${{matrix.artifact.name}} --pkg=pkg-${{matrix.arch.name}}/mingw-w64-${{matrix.arch.name}}-git-[0-9]*.tar.xz --pkg=pkg-${{matrix.arch.name}}/mingw-w64-${{matrix.arch.name}}-git-doc-html-[0-9]*.tar.xz &&
+            if test portable = '${{matrix.artifact.name}}' && test -n \"`$(git config alias.signtool)\"
+            then
+              git signtool artifacts/PortableGit-*.exe
+            fi &&
+            openssl dgst -sha256 artifacts/${{matrix.artifact.fileprefix}}-*.${{matrix.artifact.fileextension}} | sed \"s/.* //\" >artifacts/sha-256.txt
+          "@
+      - name: Copy package-versions and pdbs
+        if: env.SKIP != 'true' && matrix.artifact.name == 'installer'
+        shell: powershell
+        run: |
+          & .\git-sdk-${{matrix.arch.bitness}}-build-installers\usr\bin\bash.exe -lc @"
+            cp /usr/src/build-extra/installer/package-versions.txt artifacts/ &&
+
+            a=`$PWD/artifacts &&
+            p=`$PWD/pkg-${{matrix.arch.name}} &&
+            (cd /usr/src/build-extra &&
+            mkdir -p cached-source-packages &&
+            cp \"`$p\"/*-pdb* cached-source-packages/ &&
+            GIT_CONFIG_PARAMETERS=\"'windows.sdk${{matrix.arch.bitness}}.path='\" ./please.sh bundle_pdbs --arch=${{matrix.arch.name}} --directory=\"`$a\" installer/package-versions.txt)
+          "@
+      - name: Clean up temporary files
+        if: always() && env.SKIP != 'true'
+        shell: bash
+        run: rm -rf home
+
+      - name: Publish ${{matrix.artifact.name}}-${{matrix.arch.name}}
+        if: env.SKIP != 'true' && matrix.arch.arm64 != true
+        uses: actions/upload-artifact@v1
+        with:
+          name: ${{matrix.artifact.name}}-${{matrix.arch.name}}
+          path: artifacts
+
+      - name: Publish ${{matrix.artifact.name}}-arm64
+        if: env.SKIP != 'true' && matrix.arch.arm64 == true
+        uses: actions/upload-artifact@v1
+        with:
+          name: ${{matrix.artifact.name}}-arm64
+          path: artifacts
+  nuget:
+    runs-on: windows-latest
+    needs: pkg
+    steps:
+      - name: Determine whether this job should be skipped
+        shell: bash
+        run: |
+          case " $BUILD_ONLY " in
+          '  ') ;; # not set; build all
+          *" nuget "*) ;; # build this artifact
+          *) echo "SKIP=true" >>$GITHUB_ENV;;
+          esac
+      - name: Download pkg-x86_64
+        if: env.SKIP != 'true'
+        uses: actions/download-artifact@v1
+        with:
+          name: pkg-x86_64
+          path: pkg-x86_64
+      - name: Download bundle-artifacts
+        if: env.SKIP != 'true'
+        uses: actions/download-artifact@v1
+        with:
+          name: bundle-artifacts
+          path: bundle-artifacts
+      - name: Cache git-sdk-64-build-installers
+        if: env.SKIP != 'true'
+        id: cache-sdk-build-installers
+        uses: actions/cache@v2
+        with:
+          path: git-sdk-64-build-installers
+          key: build-installers-64-${{ needs.pkg.outputs.latest-sdk64-extra-build-id }}
+      - name: Download git-sdk-64-build-installers
+        if: env.SKIP != 'true' && steps.cache-sdk-build-installers.outputs.cache-hit != 'true'
+        shell: bash
+        run: |
+          # Use Git Bash to download and unpack the artifact
+
+          ## Get artifact
+          urlbase=https://dev.azure.com/git-for-windows/git/_apis/build/builds
+          id=${{ needs.pkg.outputs.latest-sdk64-extra-build-id }}
+          download_url=$(curl "$urlbase/$id/artifacts" |
+            jq -r '.value[] | select(.name == "git-sdk-64-build-installers").resource.downloadUrl')
+
+          curl -o artifacts.zip "$download_url"
+
+          ## Unpack artifact
+          unzip artifacts.zip
+      - name: Clone and update build-extra
+        if: env.SKIP != 'true'
+        shell: bash
+        run: |
+          d=git-sdk-64-build-installers/usr/src/build-extra &&
+          if test ! -d $d/.git
+          then
+            git clone --single-branch -b main https://github.com/git-for-windows/build-extra $d
+          else
+            git -C $d fetch https://github.com/git-for-windows/build-extra main &&
+            git -C $d switch -C main FETCH_HEAD
+          fi &&
+          git -C $d pull "$PWD"/bundle-artifacts/build-extra.bundle main
+      - uses: nuget/setup-nuget@v1
+        if: env.SKIP != 'true'
+      - name: Build 64-bit NuGet packages
+        if: env.SKIP != 'true'
+        shell: powershell
+        run: |
+          & .\git-sdk-64-build-installers\usr\bin\bash.exe -lc @"
+            /usr/src/build-extra/please.sh make_installers_from_mingw_w64_git --version=`$(cat pkg-x86_64/ver) -o artifacts --nuget --pkg=pkg-x86_64/mingw-w64-x86_64-git-[0-9]*.tar.xz --pkg=pkg-x86_64/mingw-w64-x86_64-git-doc-html-[0-9]*.tar.xz &&
+            /usr/src/build-extra/please.sh make_installers_from_mingw_w64_git --version=`$(cat pkg-x86_64/ver) -o artifacts --nuget-mingit &&
+            openssl dgst -sha256 artifacts/Git*.nupkg | sed \"s/.* //\" >artifacts/sha-256.txt
+          "@
+      - name: Publish nuget-x86_64
+        if: env.SKIP != 'true'
+        uses: actions/upload-artifact@v1
+        with:
+          name: nuget-x86_64
+          path: artifacts

.github/workflows/main.yml

@@ -164,11 +164,15 @@ jobs:
   vs-build:
     needs: ci-config
     if: needs.ci-config.outputs.enabled == 'yes'
+    timeout-minutes: 15
     env:
       MSYSTEM: MINGW64
       NO_PERL: 1
       GIT_CONFIG_PARAMETERS: "'user.name=CI' 'user.email=ci@git'"
     runs-on: windows-latest
+    strategy:
+      matrix:
+        arch: [x64, arm64]
     steps:
     - uses: actions/checkout@v1
     - name: download git-sdk-64-minimal
@@ -186,6 +190,11 @@ jobs:
         ## Unzip and remove the artifact
         unzip artifacts.zip
         rm artifacts.zip
+    - name: initialize vcpkg
+      uses: actions/checkout@v2
+      with:
+        repository: 'microsoft/vcpkg'
+        path: 'compat/vcbuild/vcpkg'
     - name: download vcpkg artifacts
       shell: powershell
       run: |
@@ -200,15 +209,15 @@ jobs:
     - name: copy dlls to root
       shell: powershell
       run: |
-        & compat\vcbuild\vcpkg_copy_dlls.bat release
+        & compat\vcbuild\vcpkg_copy_dlls.bat release ${{ matrix.arch }}-windows
         if (!$?) { exit(1) }
     - name: generate Visual Studio solution
       shell: bash
       run: |
-        cmake `pwd`/contrib/buildsystems/ -DCMAKE_PREFIX_PATH=`pwd`/compat/vcbuild/vcpkg/installed/x64-windows \
-        -DMSGFMT_EXE=`pwd`/git-sdk-64-minimal/mingw64/bin/msgfmt.exe -DPERL_TESTS=OFF -DPYTHON_TESTS=OFF -DCURL_NO_CURL_CMAKE=ON
+        cmake `pwd`/contrib/buildsystems/ -DCMAKE_PREFIX_PATH=`pwd`/compat/vcbuild/vcpkg/installed/${{ matrix.arch }}-windows \
+        -DMSGFMT_EXE=`pwd`/git-sdk-64-minimal/mingw64/bin/msgfmt.exe -DPERL_TESTS=OFF -DPYTHON_TESTS=OFF -DCURL_NO_CURL_CMAKE=ON -DCMAKE_GENERATOR_PLATFORM=${{ matrix.arch }} -DVCPKG_ARCH=${{ matrix.arch }}-windows
     - name: MSBuild
-      run: msbuild git.sln -property:Configuration=Release -property:Platform=x64 -maxCpuCount:4 -property:PlatformToolset=v142
+      run: msbuild git.sln -property:Configuration=Release -property:Platform=${{ matrix.arch }} -maxCpuCount:4 -property:PlatformToolset=v142
     - name: bundle artifact tar
       shell: powershell
       env:
@@ -222,7 +231,7 @@ jobs:
     - name: upload build artifacts
       uses: actions/upload-artifact@v1
       with:
-        name: vs-artifacts
+        name: vs-artifacts-${{ matrix.arch }}
         path: artifacts
   vs-test:
     runs-on: windows-latest
@@ -241,7 +250,7 @@ jobs:
     - name: download build artifacts
       uses: actions/download-artifact@v1
       with:
-        name: vs-artifacts
+        name: vs-artifacts-x64
         path: ${{github.workspace}}
     - name: extract build artifacts
       shell: bash

Documentation/config.txt

@@ -440,6 +440,8 @@ include::config/reset.txt[]
 
 include::config/sendemail.txt[]
 
+include::config/sendpack.txt[]
+
 include::config/sequencer.txt[]
 
 include::config/showbranch.txt[]

Documentation/config/http.txt

@@ -173,11 +173,13 @@ http.sslBackend::
 
 http.schannelCheckRevoke::
 	Used to enforce or disable certificate revocation checks in cURL
-	when http.sslBackend is set to "schannel". Defaults to `true` if
-	unset. Only necessary to disable this if Git consistently errors
-	and the message is about checking the revocation status of a
-	certificate. This option is ignored if cURL lacks support for
-	setting the relevant SSL option at runtime.
+	when http.sslBackend is set to "schannel" via "true" and "false",
+	respectively. Another accepted value is "best-effort" (the default)
+	in which case revocation checks are performed, but errors due to
+	revocation list distribution points that are offline are silently
+	ignored, as well as errors due to certificates missing revocation
+	list distribution points. This option is ignored if cURL lacks
+	support for setting the relevant SSL option at runtime.
 
 http.schannelUseSSLCAInfo::
 	As of cURL v7.60.0, the Secure Channel backend can use the

Documentation/config/sendpack.txt

@@ -0,0 +1,5 @@
+sendpack.sideband::
+	Allows to disable the side-band-64k capability for send-pack even
+	when it is advertised by the server. Makes it possible to work
+	around a limitation in the git for windows implementation together
+	with the dump git protocol. Defaults to true.

Documentation/git-maintenance.txt

@@ -218,6 +218,122 @@ Further, the `git gc` command should not be combined with
 but does not take the lock in the same way as `git maintenance run`. If
 possible, use `git maintenance run --task=gc` instead of `git gc`.
 
+The following sections describe the mechanisms put in place to run
+background maintenance by `git maintenance start` and how to customize
+them.
+
+BACKGROUND MAINTENANCE ON POSIX SYSTEMS
+---------------------------------------
+
+The standard mechanism for scheduling background tasks on POSIX systems
+is cron(8). This tool executes commands based on a given schedule. The
+current list of user-scheduled tasks can be found by running `crontab -l`.
+The schedule written by `git maintenance start` is similar to this:
+
+-----------------------------------------------------------------------
+# BEGIN GIT MAINTENANCE SCHEDULE
+# The following schedule was created by Git
+# Any edits made in this region might be
+# replaced in the future by a Git command.
+
+0 1-23 * * * "/<path>/git" --exec-path="/<path>" for-each-repo --config=maintenance.repo maintenance run --schedule=hourly
+0 0 * * 1-6 "/<path>/git" --exec-path="/<path>" for-each-repo --config=maintenance.repo maintenance run --schedule=daily
+0 0 * * 0 "/<path>/git" --exec-path="/<path>" for-each-repo --config=maintenance.repo maintenance run --schedule=weekly
+
+# END GIT MAINTENANCE SCHEDULE
+-----------------------------------------------------------------------
+
+The comments are used as a region to mark the schedule as written by Git.
+Any modifications within this region will be completely deleted by
+`git maintenance stop` or overwritten by `git maintenance start`.
+
+The `crontab` entry specifies the full path of the `git` executable to
+ensure that the executed `git` command is the same one with which
+`git maintenance start` was issued independent of `PATH`. If the same user
+runs `git maintenance start` with multiple Git executables, then only the
+latest executable is used.
+
+These commands use `git for-each-repo --config=maintenance.repo` to run
+`git maintenance run --schedule=<frequency>` on each repository listed in
+the multi-valued `maintenance.repo` config option. These are typically
+loaded from the user-specific global config. The `git maintenance` process
+then determines which maintenance tasks are configured to run on each
+repository with each `<frequency>` using the `maintenance.<task>.schedule`
+config options. These values are loaded from the global or repository
+config values.
+
+If the config values are insufficient to achieve your desired background
+maintenance schedule, then you can create your own schedule. If you run
+`crontab -e`, then an editor will load with your user-specific `cron`
+schedule. In that editor, you can add your own schedule lines. You could
+start by adapting the default schedule listed earlier, or you could read
+the crontab(5) documentation for advanced scheduling techniques. Please
+do use the full path and `--exec-path` techniques from the default
+schedule to ensure you are executing the correct binaries in your
+schedule.
+
+
+BACKGROUND MAINTENANCE ON MACOS SYSTEMS
+---------------------------------------
+
+While macOS technically supports `cron`, using `crontab -e` requires
+elevated privileges and the executed process does not have a full user
+context. Without a full user context, Git and its credential helpers
+cannot access stored credentials, so some maintenance tasks are not
+functional.
+
+Instead, `git maintenance start` interacts with the `launchctl` tool,
+which is the recommended way to schedule timed jobs in macOS. Scheduling
+maintenance through `git maintenance (start|stop)` requires some
+`launchctl` features available only in macOS 10.11 or later.
+
+Your user-specific scheduled tasks are stored as XML-formatted `.plist`
+files in `~/Library/LaunchAgents/`. You can see the currently-registered
+tasks using the following command:
+
+-----------------------------------------------------------------------
+$ ls ~/Library/LaunchAgents/org.git-scm.git*
+org.git-scm.git.daily.plist
+org.git-scm.git.hourly.plist
+org.git-scm.git.weekly.plist
+-----------------------------------------------------------------------
+
+One task is registered for each `--schedule=<frequency>` option. To
+inspect how the XML format describes each schedule, open one of these
+`.plist` files in an editor and inspect the `<array>` element following
+the `<key>StartCalendarInterval</key>` element.
+
+`git maintenance start` will overwrite these files and register the
+tasks again with `launchctl`, so any customizations should be done by
+creating your own `.plist` files with distinct names. Similarly, the
+`git maintenance stop` command will unregister the tasks with `launchctl`
+and delete the `.plist` files.
+
+To create more advanced customizations to your background tasks, see
+launchctl.plist(5) for more information.
+
+
+BACKGROUND MAINTENANCE ON WINDOWS SYSTEMS
+-----------------------------------------
+
+Windows does not support `cron` and instead has its own system for
+scheduling background tasks. The `git maintenance start` command uses
+the `schtasks` command to submit tasks to this system. You can inspect
+all background tasks using the Task Scheduler application. The tasks
+added by Git have names of the form `Git Maintenance (<frequency>)`.
+The Task Scheduler GUI has ways to inspect these tasks, but you can also
+export the tasks to XML files and view the details there.
+
+Note that since Git is a console application, these background tasks
+create a console window visible to the current user. This can be changed
+manually by selecting the "Run whether user is logged in or not" option
+in Task Scheduler. This change requires a password input, which is why
+`git maintenance start` does not select it by default.
+
+If you want to customize the background tasks, please rename the tasks
+so future calls to `git maintenance (start|stop)` do not overwrite your
+custom tasks.
+
 
 GIT
 ---

Makefile

@@ -2509,6 +2509,13 @@ compat/nedmalloc/nedmalloc.sp compat/nedmalloc/nedmalloc.o: EXTRA_CPPFLAGS = \
 compat/nedmalloc/nedmalloc.sp: SP_EXTRA_FLAGS += -Wno-non-pointer-null
 endif
 
+headless-git.o: compat/win32/headless.c
+	$(QUIET_CC)$(CC) $(ALL_CFLAGS) $(COMPAT_CFLAGS) \
+		-fno-stack-protector -o $@ -c -Wall -Wwrite-strings $<
+
+headless-git$X: headless-git.o git.res
+	$(QUIET_LINK)$(CC) $(ALL_LDFLAGS) -mwindows $(COMPAT_CFLAGS) -o $@ $^
+
 git-%$X: %.o GIT-LDFLAGS $(GITLIBS)
 	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)
 
@@ -2772,6 +2779,11 @@ ifdef GIT_TEST_INDEX_VERSION
 endif
 ifdef GIT_TEST_PERL_FATAL_WARNINGS
 	@echo GIT_TEST_PERL_FATAL_WARNINGS=\''$(subst ','\'',$(subst ','\'',$(GIT_TEST_PERL_FATAL_WARNINGS)))'\' >>$@+
+endif
+ifdef RUNTIME_PREFIX
+	@echo RUNTIME_PREFIX=\'true\' >>$@+
+else
+	@echo RUNTIME_PREFIX=\'false\' >>$@+
 endif
 	@if cmp $@+ $@ >/dev/null 2>&1; then $(RM) $@+; else mv $@+ $@; fi
 

abspath.c

@@ -95,6 +95,9 @@ char *strbuf_realpath(struct strbuf *resolved, const char *path,
 			goto error_out;
 	}
 
+	if (platform_strbuf_realpath(resolved, path))
+		return resolved->buf;
+
 	strbuf_addstr(&remaining, path);
 	get_root_part(resolved, &remaining);
 

archive-tar.c

@@ -17,6 +17,8 @@ static unsigned long offset;
 
 static int tar_umask = 002;
 
+static gzFile gzip;
+
 static int write_tar_filter_archive(const struct archiver *ar,
 				    struct archiver_args *args);
 
@@ -38,11 +40,21 @@ static int write_tar_filter_archive(const struct archiver *ar,
 #define USTAR_MAX_MTIME 077777777777ULL
 #endif
 
+/* writes out the whole block, or dies if fails */
+static void write_block_or_die(const char *block) {
+	if (gzip) {
+		if (gzwrite(gzip, block, (unsigned) BLOCKSIZE) != BLOCKSIZE)
+			die(_("gzwrite failed"));
+	} else {
+		write_or_die(1, block, BLOCKSIZE);
+	}
+}
+
 /* writes out the whole block, but only if it is full */
 static void write_if_needed(void)
 {
 	if (offset == BLOCKSIZE) {
-		write_or_die(1, block, BLOCKSIZE);
+		write_block_or_die(block);
 		offset = 0;
 	}
 }
@@ -66,7 +78,7 @@ static void do_write_blocked(const void *data, unsigned long size)
 		write_if_needed();
 	}
 	while (size >= BLOCKSIZE) {
-		write_or_die(1, buf, BLOCKSIZE);
+		write_block_or_die(buf);
 		size -= BLOCKSIZE;
 		buf += BLOCKSIZE;
 	}
@@ -101,10 +113,10 @@ static void write_trailer(void)
 {
 	int tail = BLOCKSIZE - offset;
 	memset(block + offset, 0, tail);
-	write_or_die(1, block, BLOCKSIZE);
+	write_block_or_die(block);
 	if (tail < 2 * RECORDSIZE) {
 		memset(block, 0, offset);
-		write_or_die(1, block, BLOCKSIZE);
+		write_block_or_die(block);
 	}
 }
 
@@ -446,18 +458,34 @@ static int write_tar_filter_archive(const struct archiver *ar,
 	filter.use_shell = 1;
 	filter.in = -1;
 
-	if (start_command(&filter) < 0)
-		die_errno(_("unable to start '%s' filter"), argv[0]);
-	close(1);
-	if (dup2(filter.in, 1) < 0)
-		die_errno(_("unable to redirect descriptor"));
-	close(filter.in);
+	if (!strcmp("gzip -cn", ar->data)) {
+		char outmode[4] = "wb\0";
+
+		if (args->compression_level >= 0 && args->compression_level <= 9)
+			outmode[2] = '0' + args->compression_level;
+
+		gzip = gzdopen(fileno(stdout), outmode);
+		if (!gzip)
+			die(_("Could not gzdopen stdout"));
+	} else {
+		if (start_command(&filter) < 0)
+			die_errno(_("unable to start '%s' filter"), argv[0]);
+		close(1);
+		if (dup2(filter.in, 1) < 0)
+			die_errno(_("unable to redirect descriptor"));
+		close(filter.in);
+	}
 
 	r = write_tar_archive(ar, args);
 
-	close(1);
-	if (finish_command(&filter) != 0)
-		die(_("'%s' filter reported error"), argv[0]);
+	if (gzip) {
+		if (gzclose(gzip) != Z_OK)
+			die(_("gzclose failed"));
+	} else {
+		close(1);
+		if (finish_command(&filter) != 0)
+			die(_("'%s' filter reported error"), argv[0]);
+	}
 
 	strbuf_release(&cmd);
 	return r;

builtin/clean.c

@@ -34,6 +34,10 @@ static const char *msg_remove = N_("Removing %s\n");
 static const char *msg_would_remove = N_("Would remove %s\n");
 static const char *msg_skip_git_dir = N_("Skipping repository %s\n");
 static const char *msg_would_skip_git_dir = N_("Would skip repository %s\n");
+#ifndef CAN_UNLINK_MOUNT_POINTS
+static const char *msg_skip_mount_point = N_("Skipping mount point %s\n");
+static const char *msg_would_skip_mount_point = N_("Would skip mount point %s\n");
+#endif
 static const char *msg_warn_remove_failed = N_("failed to remove %s");
 static const char *msg_warn_lstat_failed = N_("could not lstat %s\n");
 
@@ -171,6 +175,29 @@ static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
 		goto out;
 	}
 
+	if (is_mount_point(path)) {
+#ifndef CAN_UNLINK_MOUNT_POINTS
+		if (!quiet) {
+			quote_path(path->buf, prefix, &quoted, 0);
+			printf(dry_run ?
+			       _(msg_would_skip_mount_point) :
+			       _(msg_skip_mount_point), quoted.buf);
+		}
+		*dir_gone = 0;
+#else
+		if (!dry_run && unlink(path->buf)) {
+			int saved_errno = errno;
+			quote_path(path->buf, prefix, &quoted, 0);
+			errno = saved_errno;
+			warning_errno(_(msg_warn_remove_failed), quoted.buf);
+			*dir_gone = 0;
+			ret = -1;
+		}
+#endif
+
+		goto out;
+	}
+
 	dir = opendir(path->buf);
 	if (!dir) {
 		/* an empty dir could be removed even if it is unreadble */

builtin/gc.c

@@ -1493,38 +1493,368 @@ static int maintenance_unregister(void)
 	return run_command(&config_unset);
 }
 
+static const char *get_frequency(enum schedule_priority schedule)
+{
+	switch (schedule) {
+	case SCHEDULE_HOURLY:
+		return "hourly";
+	case SCHEDULE_DAILY:
+		return "daily";
+	case SCHEDULE_WEEKLY:
+		return "weekly";
+	default:
+		BUG("invalid schedule %d", schedule);
+	}
+}
+
+static char *launchctl_service_name(const char *frequency)
+{
+	struct strbuf label = STRBUF_INIT;
+	strbuf_addf(&label, "org.git-scm.git.%s", frequency);
+	return strbuf_detach(&label, NULL);
+}
+
+static char *launchctl_service_filename(const char *name)
+{
+	char *expanded;
+	struct strbuf filename = STRBUF_INIT;
+	strbuf_addf(&filename, "~/Library/LaunchAgents/%s.plist", name);
+
+	expanded = expand_user_path(filename.buf, 1);
+	if (!expanded)
+		die(_("failed to expand path '%s'"), filename.buf);
+
+	strbuf_release(&filename);
+	return expanded;
+}
+
+static char *launchctl_get_uid(void)
+{
+	return xstrfmt("gui/%d", getuid());
+}
+
+static int launchctl_boot_plist(int enable, const char *filename, const char *cmd)
+{
+	int result;
+	struct child_process child = CHILD_PROCESS_INIT;
+	char *uid = launchctl_get_uid();
+
+	strvec_split(&child.args, cmd);
+	if (enable)
+		strvec_push(&child.args, "bootstrap");
+	else
+		strvec_push(&child.args, "bootout");
+	strvec_push(&child.args, uid);
+	strvec_push(&child.args, filename);
+
+	child.no_stderr = 1;
+	child.no_stdout = 1;
+
+	if (start_command(&child))
+		die(_("failed to start launchctl"));
+
+	result = finish_command(&child);
+
+	free(uid);
+	return result;
+}
+
+static int launchctl_remove_plist(enum schedule_priority schedule, const char *cmd)
+{
+	const char *frequency = get_frequency(schedule);
+	char *name = launchctl_service_name(frequency);
+	char *filename = launchctl_service_filename(name);
+	int result = launchctl_boot_plist(0, filename, cmd);
+	unlink(filename);
+	free(filename);
+	free(name);
+	return result;
+}
+
+static int launchctl_remove_plists(const char *cmd)
+{
+	return launchctl_remove_plist(SCHEDULE_HOURLY, cmd) ||
+		launchctl_remove_plist(SCHEDULE_DAILY, cmd) ||
+		launchctl_remove_plist(SCHEDULE_WEEKLY, cmd);
+}
+
+static int launchctl_schedule_plist(const char *exec_path, enum schedule_priority schedule, const char *cmd)
+{
+	FILE *plist;
+	int i;
+	const char *preamble, *repeat;
+	const char *frequency = get_frequency(schedule);
+	char *name = launchctl_service_name(frequency);
+	char *filename = launchctl_service_filename(name);
+
+	if (safe_create_leading_directories(filename))
+		die(_("failed to create directories for '%s'"), filename);
+	plist = xfopen(filename, "w");
+
+	preamble = "<?xml version=\"1.0\"?>\n"
+		   "<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n"
+		   "<plist version=\"1.0\">"
+		   "<dict>\n"
+		   "<key>Label</key><string>%s</string>\n"
+		   "<key>ProgramArguments</key>\n"
+		   "<array>\n"
+		   "<string>%s/git</string>\n"
+		   "<string>--exec-path=%s</string>\n"
+		   "<string>for-each-repo</string>\n"
+		   "<string>--config=maintenance.repo</string>\n"
+		   "<string>maintenance</string>\n"
+		   "<string>run</string>\n"
+		   "<string>--schedule=%s</string>\n"
+		   "</array>\n"
+		   "<key>StartCalendarInterval</key>\n"
+		   "<array>\n";
+	fprintf(plist, preamble, name, exec_path, exec_path, frequency);
+
+	switch (schedule) {
+	case SCHEDULE_HOURLY:
+		repeat = "<dict>\n"
+			 "<key>Hour</key><integer>%d</integer>\n"
+			 "<key>Minute</key><integer>0</integer>\n"
+			 "</dict>\n";
+		for (i = 1; i <= 23; i++)
+			fprintf(plist, repeat, i);
+		break;
+
+	case SCHEDULE_DAILY:
+		repeat = "<dict>\n"
+			 "<key>Day</key><integer>%d</integer>\n"
+			 "<key>Hour</key><integer>0</integer>\n"
+			 "<key>Minute</key><integer>0</integer>\n"
+			 "</dict>\n";
+		for (i = 1; i <= 6; i++)
+			fprintf(plist, repeat, i);
+		break;
+
+	case SCHEDULE_WEEKLY:
+		fprintf(plist,
+			"<dict>\n"
+			"<key>Day</key><integer>0</integer>\n"
+			"<key>Hour</key><integer>0</integer>\n"
+			"<key>Minute</key><integer>0</integer>\n"
+			"</dict>\n");
+		break;
+
+	default:
+		/* unreachable */
+		break;
+	}
+	fprintf(plist, "</array>\n</dict>\n</plist>\n");
+	fclose(plist);
+
+	/* bootout might fail if not already running, so ignore */
+	launchctl_boot_plist(0, filename, cmd);
+	if (launchctl_boot_plist(1, filename, cmd))
+		die(_("failed to bootstrap service %s"), filename);
+
+	free(filename);
+	free(name);
+	return 0;
+}
+
+static int launchctl_add_plists(const char *cmd)
+{
+	const char *exec_path = git_exec_path();
+
+	return launchctl_schedule_plist(exec_path, SCHEDULE_HOURLY, cmd) ||
+		launchctl_schedule_plist(exec_path, SCHEDULE_DAILY, cmd) ||
+		launchctl_schedule_plist(exec_path, SCHEDULE_WEEKLY, cmd);
+}
+
+static int launchctl_update_schedule(int run_maintenance, int fd, const char *cmd)
+{
+	if (run_maintenance)
+		return launchctl_add_plists(cmd);
+	else
+		return launchctl_remove_plists(cmd);
+}
+
+static char *schtasks_task_name(const char *frequency)
+{
+	struct strbuf label = STRBUF_INIT;
+	strbuf_addf(&label, "Git Maintenance (%s)", frequency);
+	return strbuf_detach(&label, NULL);
+}
+
+static int schtasks_remove_task(enum schedule_priority schedule, const char *cmd)
+{
+	int result;
+	struct strvec args = STRVEC_INIT;
+	const char *frequency = get_frequency(schedule);
+	char *name = schtasks_task_name(frequency);
+
+	strvec_split(&args, cmd);
+	strvec_pushl(&args, "/delete", "/tn", name, "/f", NULL);
+
+	result = run_command_v_opt(args.v, 0);
+
+	strvec_clear(&args);
+	free(name);
+	return result;
+}
+
+static int schtasks_remove_tasks(const char *cmd)
+{
+	return schtasks_remove_task(SCHEDULE_HOURLY, cmd) ||
+		schtasks_remove_task(SCHEDULE_DAILY, cmd) ||
+		schtasks_remove_task(SCHEDULE_WEEKLY, cmd);
+}
+
+static int schtasks_schedule_task(const char *exec_path, enum schedule_priority schedule, const char *cmd)
+{
+	int result;
+	struct child_process child = CHILD_PROCESS_INIT;
+	const char *xml;
+	struct tempfile *tfile;
+	const char *frequency = get_frequency(schedule);
+	char *name = schtasks_task_name(frequency);
+	struct strbuf tfilename = STRBUF_INIT;
+
+	strbuf_addf(&tfilename, "%s/schedule_%s_XXXXXX",
+		    get_git_common_dir(), frequency);
+	tfile = xmks_tempfile(tfilename.buf);
+	strbuf_release(&tfilename);
+
+	if (!fdopen_tempfile(tfile, "w"))
+		die(_("failed to create temp xml file"));
+
+	xml = "<?xml version=\"1.0\" ?>\n"
+	      "<Task version=\"1.4\" xmlns=\"http://schemas.microsoft.com/windows/2004/02/mit/task\">\n"
+	      "<Triggers>\n"
+	      "<CalendarTrigger>\n";
+	fputs(xml, tfile->fp);
+
+	switch (schedule) {
+	case SCHEDULE_HOURLY:
+		fprintf(tfile->fp,
+			"<StartBoundary>2020-01-01T01:00:00</StartBoundary>\n"
+			"<Enabled>true</Enabled>\n"
+			"<ScheduleByDay>\n"
+			"<DaysInterval>1</DaysInterval>\n"
+			"</ScheduleByDay>\n"
+			"<Repetition>\n"
+			"<Interval>PT1H</Interval>\n"
+			"<Duration>PT23H</Duration>\n"
+			"<StopAtDurationEnd>false</StopAtDurationEnd>\n"
+			"</Repetition>\n");
+		break;
+
+	case SCHEDULE_DAILY:
+		fprintf(tfile->fp,
+			"<StartBoundary>2020-01-01T00:00:00</StartBoundary>\n"
+			"<Enabled>true</Enabled>\n"
+			"<ScheduleByWeek>\n"
+			"<DaysOfWeek>\n"
+			"<Monday />\n"
+			"<Tuesday />\n"
+			"<Wednesday />\n"
+			"<Thursday />\n"
+			"<Friday />\n"
+			"<Saturday />\n"
+			"</DaysOfWeek>\n"
+			"<WeeksInterval>1</WeeksInterval>\n"
+			"</ScheduleByWeek>\n");
+		break;
+
+	case SCHEDULE_WEEKLY:
+		fprintf(tfile->fp,
+			"<StartBoundary>2020-01-01T00:00:00</StartBoundary>\n"
+			"<Enabled>true</Enabled>\n"
+			"<ScheduleByWeek>\n"
+			"<DaysOfWeek>\n"
+			"<Sunday />\n"
+			"</DaysOfWeek>\n"
+			"<WeeksInterval>1</WeeksInterval>\n"
+			"</ScheduleByWeek>\n");
+		break;
+
+	default:
+		break;
+	}
+
+	xml = "</CalendarTrigger>\n"
+	      "</Triggers>\n"
+	      "<Principals>\n"
+	      "<Principal id=\"Author\">\n"
+	      "<LogonType>InteractiveToken</LogonType>\n"
+	      "<RunLevel>LeastPrivilege</RunLevel>\n"
+	      "</Principal>\n"
+	      "</Principals>\n"
+	      "<Settings>\n"
+	      "<MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>\n"
+	      "<Enabled>true</Enabled>\n"
+	      "<Hidden>true</Hidden>\n"
+	      "<UseUnifiedSchedulingEngine>true</UseUnifiedSchedulingEngine>\n"
+	      "<WakeToRun>false</WakeToRun>\n"
+	      "<ExecutionTimeLimit>PT72H</ExecutionTimeLimit>\n"
+	      "<Priority>7</Priority>\n"
+	      "</Settings>\n"
+	      "<Actions Context=\"Author\">\n"
+	      "<Exec>\n"
+	      "<Command>\"%s\\headless-git.exe\"</Command>\n"
+	      "<Arguments>--exec-path=\"%s\" for-each-repo --config=maintenance.repo maintenance run --schedule=%s</Arguments>\n"
+	      "</Exec>\n"
+	      "</Actions>\n"
+	      "</Task>\n";
+	fprintf(tfile->fp, xml, exec_path, exec_path, frequency);
+	strvec_split(&child.args, cmd);
+	strvec_pushl(&child.args, "/create", "/tn", name, "/f", "/xml",
+				  get_tempfile_path(tfile), NULL);
+	close_tempfile_gently(tfile);
+
+	child.no_stdout = 1;
+	child.no_stderr = 1;
+
+	if (start_command(&child))
+		die(_("failed to start schtasks"));
+	result = finish_command(&child);
+
+	delete_tempfile(&tfile);
+	free(name);
+	return result;
+}
+
+static int schtasks_schedule_tasks(const char *cmd)
+{
+	const char *exec_path = git_exec_path();
+
+	return schtasks_schedule_task(exec_path, SCHEDULE_HOURLY, cmd) ||
+		schtasks_schedule_task(exec_path, SCHEDULE_DAILY, cmd) ||
+		schtasks_schedule_task(exec_path, SCHEDULE_WEEKLY, cmd);
+}
+
+static int schtasks_update_schedule(int run_maintenance, int fd, const char *cmd)
+{
+	if (run_maintenance)
+		return schtasks_schedule_tasks(cmd);
+	else
+		return schtasks_remove_tasks(cmd);
+}
+
 #define BEGIN_LINE "# BEGIN GIT MAINTENANCE SCHEDULE"
 #define END_LINE "# END GIT MAINTENANCE SCHEDULE"
 
-static int update_background_schedule(int run_maintenance)
+static int crontab_update_schedule(int run_maintenance, int fd, const char *cmd)
 {
 	int result = 0;
 	int in_old_region = 0;
 	struct child_process crontab_list = CHILD_PROCESS_INIT;
 	struct child_process crontab_edit = CHILD_PROCESS_INIT;
 	FILE *cron_list, *cron_in;
-	const char *crontab_name;
 	struct strbuf line = STRBUF_INIT;
-	struct lock_file lk;
-	char *lock_path = xstrfmt("%s/schedule", the_repository->objects->odb->path);
 
-	if (hold_lock_file_for_update(&lk, lock_path, LOCK_NO_DEREF) < 0)
-		return error(_("another process is scheduling background maintenance"));
-
-	crontab_name = getenv("GIT_TEST_CRONTAB");
-	if (!crontab_name)
-		crontab_name = "crontab";
-
-	strvec_split(&crontab_list.args, crontab_name);
+	strvec_split(&crontab_list.args, cmd);
 	strvec_push(&crontab_list.args, "-l");
 	crontab_list.in = -1;
-	crontab_list.out = dup(get_lock_file_fd(&lk));
+	crontab_list.out = dup(fd);
 	crontab_list.git_cmd = 0;
 
-	if (start_command(&crontab_list)) {
-		result = error(_("failed to run 'crontab -l'; your system might not support 'cron'"));
-		goto cleanup;
-	}
+	if (start_command(&crontab_list))
+		return error(_("failed to run 'crontab -l'; your system might not support 'cron'"));
 
 	/* Ignore exit code, as an empty crontab will return error. */
 	finish_command(&crontab_list);
@@ -1533,17 +1863,15 @@ static int update_background_schedule(int run_maintenance)
 	 * Read from the .lock file, filtering out the old
 	 * schedule while appending the new schedule.
 	 */
-	cron_list = fdopen(get_lock_file_fd(&lk), "r");
+	cron_list = fdopen(fd, "r");
 	rewind(cron_list);
 
-	strvec_split(&crontab_edit.args, crontab_name);
+	strvec_split(&crontab_edit.args, cmd);
 	crontab_edit.in = -1;
 	crontab_edit.git_cmd = 0;
 
-	if (start_command(&crontab_edit)) {
-		result = error(_("failed to run 'crontab'; your system might not support 'cron'"));
-		goto cleanup;
-	}
+	if (start_command(&crontab_edit))
+		return error(_("failed to run 'crontab'; your system might not support 'cron'"));
 
 	cron_in = fdopen(crontab_edit.in, "w");
 	if (!cron_in) {
@@ -1587,14 +1915,54 @@ static int update_background_schedule(int run_maintenance)
 	close(crontab_edit.in);
 
 done_editing:
-	if (finish_command(&crontab_edit)) {
+	if (finish_command(&crontab_edit))
 		result = error(_("'crontab' died"));
-		goto cleanup;
-	}
-	fclose(cron_list);
+	else
+		fclose(cron_list);
+	return result;
+}
+
+#if defined(__APPLE__)
+static const char platform_scheduler[] = "launchctl";
+#elif defined(GIT_WINDOWS_NATIVE)
+static const char platform_scheduler[] = "schtasks";
+#else
+static const char platform_scheduler[] = "crontab";
+#endif
+
+static int update_background_schedule(int enable)
+{
+	int result;
+	const char *scheduler = platform_scheduler;
+	const char *cmd = scheduler;
+	char *testing;
+	struct lock_file lk;
+	char *lock_path = xstrfmt("%s/schedule", the_repository->objects->odb->path);
+
+	testing = xstrdup_or_null(getenv("GIT_TEST_MAINT_SCHEDULER"));
+	if (testing) {
+		char *sep = strchr(testing, ':');
+		if (!sep)
+			die("GIT_TEST_MAINT_SCHEDULER unparseable: %s", testing);
+		*sep = '\0';
+		scheduler = testing;
+		cmd = sep + 1;
+	}
+
+	if (hold_lock_file_for_update(&lk, lock_path, LOCK_NO_DEREF) < 0)
+		return error(_("another process is scheduling background maintenance"));
+
+	if (!strcmp(scheduler, "launchctl"))
+		result = launchctl_update_schedule(enable, lk.tempfile->fd, cmd);
+	else if (!strcmp(scheduler, "schtasks"))
+		result = schtasks_update_schedule(enable, lk.tempfile->fd, cmd);
+	else if (!strcmp(scheduler, "crontab"))
+		result = crontab_update_schedule(enable, lk.tempfile->fd, cmd);
+	else
+		die("unknown background scheduler: %s", scheduler);
 
-cleanup:
 	rollback_lock_file(&lk);
+	free(testing);
 	return result;
 }
 

cache.h

@@ -1240,6 +1240,7 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
 int normalize_path_copy(char *dst, const char *src);
 int longest_ancestor_length(const char *path, struct string_list *prefixes);
 char *strip_path_suffix(const char *path, const char *suffix);
+int is_mount_point_via_stat(struct strbuf *path);
 int daemon_avoid_alias(const char *path);
 
 /*

compat/mingw.c

@@ -1007,11 +1007,19 @@ unsigned int sleep (unsigned int seconds)
 char *mingw_mktemp(char *template)
 {
 	wchar_t wtemplate[MAX_PATH];
+	int offset = 0;
+
 	if (xutftowcs_path(wtemplate, template) < 0)
 		return NULL;
+
+	if (is_dir_sep(template[0]) && !is_dir_sep(template[1]) &&
+	    iswalpha(wtemplate[0]) && wtemplate[1] == L':') {
+		/* We have an absolute path missing the drive prefix */
+		offset = 2;
+	}
 	if (!_wmktemp(wtemplate))
 		return NULL;
-	if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
+	if (xwcstoutf(template, wtemplate + offset, strlen(template) + 1) < 0)
 		return NULL;
 	return template;
 }
@@ -1074,33 +1082,97 @@ struct tm *localtime_r(const time_t *timep, struct tm *result)
 	return NULL;
 }
 
+char *mingw_strbuf_realpath(struct strbuf *resolved, const char *path)
+{
+	wchar_t wpath[MAX_PATH];
+	HANDLE h;
+	DWORD ret;
+	int len;
+	const char *last_component = NULL;
+
+	if (xutftowcs_path(wpath, path) < 0)
+		return NULL;
+
+	h = CreateFileW(wpath, 0,
+			FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
+			OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+
+	/*
+	 * strbuf_realpath() allows the last path component to not exist. If
+	 * that is the case, now it's time to try without last component.
+	 */
+	if (h == INVALID_HANDLE_VALUE &&
+	    GetLastError() == ERROR_FILE_NOT_FOUND) {
+		/* cut last component off of `wpath` */
+		wchar_t *p = wpath + wcslen(wpath);
+
+		while (p != wpath)
+			if (*(--p) == L'/' || *p == L'\\')
+				break; /* found start of last component */
+
+		if (p != wpath && (last_component = find_last_dir_sep(path))) {
+			last_component++; /* skip directory separator */
+			*p = L'\0';
+			h = CreateFileW(wpath, 0, FILE_SHARE_READ |
+					FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+					NULL, OPEN_EXISTING,
+					FILE_FLAG_BACKUP_SEMANTICS, NULL);
+		}
+	}
+
+	if (h == INVALID_HANDLE_VALUE)
+		return NULL;
+
+	ret = GetFinalPathNameByHandleW(h, wpath, ARRAY_SIZE(wpath), 0);
+	CloseHandle(h);
+	if (!ret || ret >= ARRAY_SIZE(wpath))
+		return NULL;
+
+	len = wcslen(wpath) * 3;
+	strbuf_grow(resolved, len);
+	len = xwcstoutf(resolved->buf, normalize_ntpath(wpath), len);
+	if (len < 0)
+		return NULL;
+	resolved->len = len;
+
+	if (last_component) {
+		/* Use forward-slash, like `normalize_ntpath()` */
+		strbuf_addch(resolved, '/');
+		strbuf_addstr(resolved, last_component);
+	}
+
+	return resolved->buf;
+
+}
+
 char *mingw_getcwd(char *pointer, int len)
 {
 	wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
 	DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
+	HANDLE hnd;
 
 	if (!ret || ret >= ARRAY_SIZE(cwd)) {
 		errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
 		return NULL;
 	}
-	ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
-	if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
-		HANDLE hnd = CreateFileW(cwd, 0,
-			FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
-			OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
-		if (hnd == INVALID_HANDLE_VALUE)
-			return NULL;
+	hnd = CreateFileW(cwd, 0,
+			  FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
+			  OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+	if (hnd != INVALID_HANDLE_VALUE) {
 		ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
 		CloseHandle(hnd);
-		if (!ret || ret >= ARRAY_SIZE(wpointer))
-			return NULL;
+		if (!ret || ret >= ARRAY_SIZE(wpointer)) {
+			ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
+			if (!ret || ret >= ARRAY_SIZE(wpointer)) {
+				errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
+				return NULL;
+			}
+		}
 		if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
 			return NULL;
 		return pointer;
 	}
-	if (!ret || ret >= ARRAY_SIZE(wpointer))
-		return NULL;
-	if (xwcstoutf(pointer, wpointer, len) < 0)
+	if (xwcstoutf(pointer, cwd, len) < 0)
 		return NULL;
 	convert_slashes(pointer);
 	return pointer;
@@ -1973,18 +2045,150 @@ static void ensure_socket_initialization(void)
 	initialized = 1;
 }
 
+static int winsock_error_to_errno(DWORD err)
+{
+	switch (err) {
+	case WSAEINTR: return EINTR;
+	case WSAEBADF: return EBADF;
+	case WSAEACCES: return EACCES;
+	case WSAEFAULT: return EFAULT;
+	case WSAEINVAL: return EINVAL;
+	case WSAEMFILE: return EMFILE;
+	case WSAEWOULDBLOCK: return EWOULDBLOCK;
+	case WSAEINPROGRESS: return EINPROGRESS;
+	case WSAEALREADY: return EALREADY;
+	case WSAENOTSOCK: return ENOTSOCK;
+	case WSAEDESTADDRREQ: return EDESTADDRREQ;
+	case WSAEMSGSIZE: return EMSGSIZE;
+	case WSAEPROTOTYPE: return EPROTOTYPE;
+	case WSAENOPROTOOPT: return ENOPROTOOPT;
+	case WSAEPROTONOSUPPORT: return EPROTONOSUPPORT;
+	case WSAEOPNOTSUPP: return EOPNOTSUPP;
+	case WSAEAFNOSUPPORT: return EAFNOSUPPORT;
+	case WSAEADDRINUSE: return EADDRINUSE;
+	case WSAEADDRNOTAVAIL: return EADDRNOTAVAIL;
+	case WSAENETDOWN: return ENETDOWN;
+	case WSAENETUNREACH: return ENETUNREACH;
+	case WSAENETRESET: return ENETRESET;
+	case WSAECONNABORTED: return ECONNABORTED;
+	case WSAECONNRESET: return ECONNRESET;
+	case WSAENOBUFS: return ENOBUFS;
+	case WSAEISCONN: return EISCONN;
+	case WSAENOTCONN: return ENOTCONN;
+	case WSAETIMEDOUT: return ETIMEDOUT;
+	case WSAECONNREFUSED: return ECONNREFUSED;
+	case WSAELOOP: return ELOOP;
+	case WSAENAMETOOLONG: return ENAMETOOLONG;
+	case WSAEHOSTUNREACH: return EHOSTUNREACH;
+	case WSAENOTEMPTY: return ENOTEMPTY;
+	/* No errno equivalent; default to EIO */
+	case WSAESOCKTNOSUPPORT:
+	case WSAEPFNOSUPPORT:
+	case WSAESHUTDOWN:
+	case WSAETOOMANYREFS:
+	case WSAEHOSTDOWN:
+	case WSAEPROCLIM:
+	case WSAEUSERS:
+	case WSAEDQUOT:
+	case WSAESTALE:
+	case WSAEREMOTE:
+	case WSASYSNOTREADY:
+	case WSAVERNOTSUPPORTED:
+	case WSANOTINITIALISED:
+	case WSAEDISCON:
+	case WSAENOMORE:
+	case WSAECANCELLED:
+	case WSAEINVALIDPROCTABLE:
+	case WSAEINVALIDPROVIDER:
+	case WSAEPROVIDERFAILEDINIT:
+	case WSASYSCALLFAILURE:
+	case WSASERVICE_NOT_FOUND:
+	case WSATYPE_NOT_FOUND:
+	case WSA_E_NO_MORE:
+	case WSA_E_CANCELLED:
+	case WSAEREFUSED:
+	case WSAHOST_NOT_FOUND:
+	case WSATRY_AGAIN:
+	case WSANO_RECOVERY:
+	case WSANO_DATA:
+	case WSA_QOS_RECEIVERS:
+	case WSA_QOS_SENDERS:
+	case WSA_QOS_NO_SENDERS:
+	case WSA_QOS_NO_RECEIVERS:
+	case WSA_QOS_REQUEST_CONFIRMED:
+	case WSA_QOS_ADMISSION_FAILURE:
+	case WSA_QOS_POLICY_FAILURE:
+	case WSA_QOS_BAD_STYLE:
+	case WSA_QOS_BAD_OBJECT:
+	case WSA_QOS_TRAFFIC_CTRL_ERROR:
+	case WSA_QOS_GENERIC_ERROR:
+	case WSA_QOS_ESERVICETYPE:
+	case WSA_QOS_EFLOWSPEC:
+	case WSA_QOS_EPROVSPECBUF:
+	case WSA_QOS_EFILTERSTYLE:
+	case WSA_QOS_EFILTERTYPE:
+	case WSA_QOS_EFILTERCOUNT:
+	case WSA_QOS_EOBJLENGTH:
+	case WSA_QOS_EFLOWCOUNT:
+#ifndef _MSC_VER
+	case WSA_QOS_EUNKNOWNPSOBJ:
+#endif
+	case WSA_QOS_EPOLICYOBJ:
+	case WSA_QOS_EFLOWDESC:
+	case WSA_QOS_EPSFLOWSPEC:
+	case WSA_QOS_EPSFILTERSPEC:
+	case WSA_QOS_ESDMODEOBJ:
+	case WSA_QOS_ESHAPERATEOBJ:
+	case WSA_QOS_RESERVED_PETYPE:
+	default: return EIO;
+	}
+}
+
+/*
+ * On Windows, `errno` is a global macro to a function call.
+ * This makes it difficult to debug and single-step our mappings.
+ */
+static inline void set_wsa_errno(void)
+{
+	DWORD wsa = WSAGetLastError();
+	int e = winsock_error_to_errno(wsa);
+	errno = e;
+
+#ifdef DEBUG_WSA_ERRNO
+	fprintf(stderr, "winsock error: %d -> %d\n", wsa, e);
+	fflush(stderr);
+#endif
+}
+
+static inline int winsock_return(int ret)
+{
+	if (ret < 0)
+		set_wsa_errno();
+
+	return ret;
+}
+
+#define WINSOCK_RETURN(x) do { return winsock_return(x); } while (0)
+
 #undef gethostname
 int mingw_gethostname(char *name, int namelen)
 {
-    ensure_socket_initialization();
-    return gethostname(name, namelen);
+	ensure_socket_initialization();
+	WINSOCK_RETURN(gethostname(name, namelen));
 }
 
 #undef gethostbyname
 struct hostent *mingw_gethostbyname(const char *host)
 {
+	struct hostent *ret;
+
 	ensure_socket_initialization();
-	return gethostbyname(host);
+
+	ret = gethostbyname(host);
+	if (!ret)
+		set_wsa_errno();
+
+	return ret;
 }
 
 #undef getaddrinfo
@@ -1992,7 +2196,7 @@ int mingw_getaddrinfo(const char *node, const char *service,
 		      const struct addrinfo *hints, struct addrinfo **res)
 {
 	ensure_socket_initialization();
-	return getaddrinfo(node, service, hints, res);
+	WINSOCK_RETURN(getaddrinfo(node, service, hints, res));
 }
 
 int mingw_socket(int domain, int type, int protocol)
@@ -2012,7 +2216,7 @@ int mingw_socket(int domain, int type, int protocol)
 		 * in errno so that _if_ someone looks up the code somewhere,
 		 * then it is at least the number that are usually listed.
 		 */
-		errno = WSAGetLastError();
+		set_wsa_errno();
 		return -1;
 	}
 	/* convert into a file descriptor */
@@ -2028,35 +2232,35 @@ int mingw_socket(int domain, int type, int protocol)
 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
 {
 	SOCKET s = (SOCKET)_get_osfhandle(sockfd);
-	return connect(s, sa, sz);
+	WINSOCK_RETURN(connect(s, sa, sz));
 }
 
 #undef bind
 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
 {
 	SOCKET s = (SOCKET)_get_osfhandle(sockfd);
-	return bind(s, sa, sz);
+	WINSOCK_RETURN(bind(s, sa, sz));
 }
 
 #undef setsockopt
 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
 {
 	SOCKET s = (SOCKET)_get_osfhandle(sockfd);
-	return setsockopt(s, lvl, optname, (const char*)optval, optlen);
+	WINSOCK_RETURN(setsockopt(s, lvl, optname, (const char*)optval, optlen));
 }
 
 #undef shutdown
 int mingw_shutdown(int sockfd, int how)
 {
 	SOCKET s = (SOCKET)_get_osfhandle(sockfd);
-	return shutdown(s, how);
+	WINSOCK_RETURN(shutdown(s, how));
 }
 
 #undef listen
 int mingw_listen(int sockfd, int backlog)
 {
 	SOCKET s = (SOCKET)_get_osfhandle(sockfd);
-	return listen(s, backlog);
+	WINSOCK_RETURN(listen(s, backlog));
 }
 
 #undef accept
@@ -2067,6 +2271,11 @@ int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
 	SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
 	SOCKET s2 = accept(s1, sa, sz);
 
+	if (s2 == INVALID_SOCKET) {
+		set_wsa_errno();
+		return -1;
+	}
+
 	/* convert into a file descriptor */
 	if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
 		int err = errno;
@@ -2461,6 +2670,28 @@ pid_t waitpid(pid_t pid, int *status, int options)
 	return -1;
 }
 
+int mingw_is_mount_point(struct strbuf *path)
+{
+	WIN32_FIND_DATAW findbuf = { 0 };
+	HANDLE handle;
+	wchar_t wfilename[MAX_PATH];
+	int wlen = xutftowcs_path(wfilename, path->buf);
+	if (wlen < 0)
+		die(_("could not get long path for '%s'"), path->buf);
+
+	/* remove trailing slash, if any */
+	if (wlen > 0 && wfilename[wlen - 1] == L'/')
+		wfilename[--wlen] = L'\0';
+
+	handle = FindFirstFileW(wfilename, &findbuf);
+	if (handle == INVALID_HANDLE_VALUE)
+		return 0;
+	FindClose(handle);
+
+	return (findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
+		(findbuf.dwReserved0 == IO_REPARSE_TAG_MOUNT_POINT);
+}
+
 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
 {
 	int upos = 0, wpos = 0;
@@ -2546,6 +2777,59 @@ int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
 	return -1;
 }
 
+#ifdef ENSURE_MSYSTEM_IS_SET
+static size_t append_system_bin_dirs(char *path, size_t size)
+{
+#if !defined(RUNTIME_PREFIX) || !defined(HAVE_WPGMPTR)
+	return 0;
+#else
+	char prefix[32768];
+	const char *slash;
+	size_t len = xwcstoutf(prefix, _wpgmptr, sizeof(prefix)), off = 0;
+
+	if (len == 0 || len >= sizeof(prefix) ||
+	    !(slash = find_last_dir_sep(prefix)))
+		return 0;
+	/* strip trailing `git.exe` */
+	len = slash - prefix;
+
+	/* strip trailing `cmd` or `mingw64\bin` or `mingw32\bin` or `bin` or `libexec\git-core` */
+	if (strip_suffix_mem(prefix, &len, "\\mingw64\\libexec\\git-core") ||
+	    strip_suffix_mem(prefix, &len, "\\mingw64\\bin"))
+		off += xsnprintf(path + off, size - off,
+				 "%.*s\\mingw64\\bin;", (int)len, prefix);
+	else if (strip_suffix_mem(prefix, &len, "\\mingw32\\libexec\\git-core") ||
+		 strip_suffix_mem(prefix, &len, "\\mingw32\\bin"))
+		off += xsnprintf(path + off, size - off,
+				 "%.*s\\mingw32\\bin;", (int)len, prefix);
+	else if (strip_suffix_mem(prefix, &len, "\\cmd") ||
+		 strip_suffix_mem(prefix, &len, "\\bin") ||
+		 strip_suffix_mem(prefix, &len, "\\libexec\\git-core"))
+		off += xsnprintf(path + off, size - off,
+				 "%.*s\\mingw%d\\bin;", (int)len, prefix,
+				 (int)(sizeof(void *) * 8));
+	else
+		return 0;
+
+	off += xsnprintf(path + off, size - off,
+			 "%.*s\\usr\\bin;", (int)len, prefix);
+	return off;
+#endif
+}
+#endif
+
+static int is_system32_path(const char *path)
+{
+	WCHAR system32[MAX_LONG_PATH], wpath[MAX_LONG_PATH];
+
+	if (xutftowcs_long_path(wpath, path) < 0 ||
+	    !GetSystemDirectoryW(system32, ARRAY_SIZE(system32)) ||
+	    _wcsicmp(system32, wpath))
+		return 0;
+
+	return 1;
+}
+
 static void setup_windows_environment(void)
 {
 	char *tmp = getenv("TMPDIR");
@@ -2586,7 +2870,8 @@ static void setup_windows_environment(void)
 			strbuf_addstr(&buf, tmp);
 			if ((tmp = getenv("HOMEPATH"))) {
 				strbuf_addstr(&buf, tmp);
-				if (is_directory(buf.buf))
+				if (!is_system32_path(buf.buf) &&
+				    is_directory(buf.buf))
 					setenv("HOME", buf.buf, 1);
 				else
 					tmp = NULL; /* use $USERPROFILE */
@@ -2597,6 +2882,37 @@ static void setup_windows_environment(void)
 		if (!tmp && (tmp = getenv("USERPROFILE")))
 			setenv("HOME", tmp, 1);
 	}
+
+	if (!getenv("PLINK_PROTOCOL"))
+		setenv("PLINK_PROTOCOL", "ssh", 0);
+
+#ifdef ENSURE_MSYSTEM_IS_SET
+	if (!(tmp = getenv("MSYSTEM")) || !tmp[0]) {
+		const char *home = getenv("HOME"), *path = getenv("PATH");
+		char buf[32768];
+		size_t off = 0;
+
+		xsnprintf(buf, sizeof(buf),
+			  "MINGW%d", (int)(sizeof(void *) * 8));
+		setenv("MSYSTEM", buf, 1);
+
+		if (home)
+			off += xsnprintf(buf + off, sizeof(buf) - off,
+					 "%s\\bin;", home);
+		off += append_system_bin_dirs(buf + off, sizeof(buf) - off);
+		if (path)
+			off += xsnprintf(buf + off, sizeof(buf) - off,
+					 "%s", path);
+		else if (off > 0)
+			buf[off - 1] = '\0';
+		else
+			buf[0] = '\0';
+		setenv("PATH", buf, 1);
+	}
+#endif
+
+	if (!getenv("LC_ALL") && !getenv("LC_CTYPE") && !getenv("LANG"))
+		setenv("LC_CTYPE", "C.UTF-8", 1);
 }
 
 int is_valid_win32_path(const char *path, int allow_literal_nul)
@@ -2841,6 +3157,7 @@ int wmain(int argc, const wchar_t **wargv)
 #endif
 
 	maybe_redirect_std_handles();
+	fsync_object_files = 1;
 
 	/* determine size of argv and environ conversion buffer */
 	maxlen = wcslen(wargv[0]);

compat/mingw.h

@@ -442,9 +442,15 @@ static inline void convert_slashes(char *path)
 		if (*path == '\\')
 			*path = '/';
 }
+struct strbuf;
+int mingw_is_mount_point(struct strbuf *path);
+#define is_mount_point mingw_is_mount_point
+#define CAN_UNLINK_MOUNT_POINTS 1
 #define PATH_SEP ';'
 char *mingw_query_user_email(void);
 #define query_user_email mingw_query_user_email
+char *mingw_strbuf_realpath(struct strbuf *resolved, const char *path);
+#define platform_strbuf_realpath mingw_strbuf_realpath
 #if !defined(__MINGW64_VERSION_MAJOR) && (!defined(_MSC_VER) || _MSC_VER < 1800)
 #define PRIuMAX "I64u"
 #define PRId64 "I64d"

compat/vcbuild/README

@@ -6,7 +6,11 @@ The Steps to Build Git with VS2015 or VS2017 from the command line.
    Prompt or from an SDK bash window:
 
    $ cd <repo_root>
-   $ ./compat/vcbuild/vcpkg_install.bat
+   $ ./compat/vcbuild/vcpkg_install.bat x64-windows
+
+   or
+
+   $ ./compat/vcbuild/vcpkg_install.bat arm64-windows
 
    The vcpkg tools and all of the third-party sources will be installed
    in this folder:

compat/vcbuild/scripts/clink.pl

@@ -56,7 +56,8 @@ while (@ARGV) {
 		# need to use that instead?
 		foreach my $flag (@lflags) {
 			if ($flag =~ /^-LIBPATH:(.*)/) {
-				foreach my $l ("libcurl_imp.lib", "libcurl.lib") {
+				my $libcurl = $is_debug ? "libcurl-d.lib" : "libcurl.lib";
+				foreach my $l ("libcurl_imp.lib", $libcurl) {
 					if (-f "$1/$l") {
 						$lib = $l;
 						last;

compat/vcbuild/vcpkg_copy_dlls.bat

@@ -15,7 +15,12 @@ REM ================================================================
 	@FOR /F "delims=" %%D IN ("%~dp0") DO @SET cwd=%%~fD
 	cd %cwd%
 
-	SET arch=x64-windows
+	SET arch=%2
+	IF NOT DEFINED arch (
+		echo defaulting to 'x64-windows`. Invoke %0 with 'x86-windows', 'x64-windows', or 'arm64-windows'
+		set arch=x64-windows
+	)
+
 	SET inst=%cwd%vcpkg\installed\%arch%
 
 	IF [%1]==[release] (

compat/vcbuild/vcpkg_install.bat

@@ -31,11 +31,24 @@ REM ================================================================
 
 	SETLOCAL EnableDelayedExpansion
 
+	SET arch=%1
+	IF NOT DEFINED arch (
+		echo defaulting to 'x64-windows`. Invoke %0 with 'x86-windows', 'x64-windows', or 'arm64-windows'
+		set arch=x64-windows
+	)
+
 	@FOR /F "delims=" %%D IN ("%~dp0") DO @SET cwd=%%~fD
 	cd %cwd%
 
 	dir vcpkg\vcpkg.exe >nul 2>nul && GOTO :install_libraries
 
+	git.exe version 2>nul
+	IF ERRORLEVEL 1 (
+	echo "***"
+	echo "Git not found. Please adjust your CMD path or Git install option."
+	echo "***"
+	EXIT /B 1 )
+
 	echo Fetching vcpkg in %cwd%vcpkg
 	git.exe clone https://github.com/Microsoft/vcpkg vcpkg
 	IF ERRORLEVEL 1 ( EXIT /B 1 )
@@ -48,9 +61,8 @@ REM ================================================================
 	echo Successfully installed %cwd%vcpkg\vcpkg.exe
 
 :install_libraries
-	SET arch=x64-windows
 
-	echo Installing third-party libraries...
+	echo Installing third-party libraries(%arch%)...
 	FOR %%i IN (zlib expat libiconv openssl libssh2 curl) DO (
 	    cd %cwd%vcpkg
 	    IF NOT EXIST "packages\%%i_%arch%" CALL :sub__install_one %%i
@@ -73,8 +85,47 @@ REM ================================================================
 :sub__install_one
 	echo     Installing package %1...
 
-	.\vcpkg.exe install %1:%arch%
+	call :%1_features
+
+	REM vcpkg may not be reliable on slow, intermittent or proxy
+	REM connections, see e.g.
+	REM https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/4a8f7be5-5e15-4213-a7bb-ddf424a954e6/winhttpsendrequest-ends-with-12002-errorhttptimeout-after-21-seconds-no-matter-what-timeout?forum=windowssdk
+	REM which explains the hidden 21 second timeout
+	REM (last post by Dave : Microsoft - Windows Networking team)
+
+	.\vcpkg.exe install %1%features%:%arch%
 	IF ERRORLEVEL 1 ( EXIT /B 1 )
 
 	echo     Finished %1
 	goto :EOF
+
+::
+:: features for each vcpkg to install
+:: there should be an entry here for each package to install
+:: 'set features=' means use the default otherwise
+:: 'set features=[comma-delimited-feature-set]' is the syntax
+::
+
+:zlib_features
+set features=
+goto :EOF
+
+:expat_features
+set features=
+goto :EOF
+
+:libiconv_features
+set features=
+goto :EOF
+
+:openssl_features
+set features=
+goto :EOF
+
+:libssh2_features
+set features=
+goto :EOF
+
+:curl_features
+set features=[core,openssl,schannel]
+goto :EOF

compat/win32/headless.c

@@ -0,0 +1,114 @@
+/*
+ * headless Git - run Git without opening a console window on Windows
+ */
+
+#define STRICT
+#define WIN32_LEAN_AND_MEAN
+#define UNICODE
+#define _UNICODE
+#include <windows.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <wchar.h>
+
+/*
+ * If `dir` contains the path to a Git exec directory, extend `PATH` to
+ * include the corresponding `bin/` directory (which is where all those
+ * `.dll` files needed by `git.exe` are, on Windows).
+ */
+static int extend_path(wchar_t *dir, size_t dir_len)
+{
+	const wchar_t *suffix = L"\\libexec\\git-core";
+	size_t suffix_len = wcslen(suffix);
+	wchar_t *env;
+	DWORD len;
+
+	if (dir_len < suffix_len)
+		return 0;
+
+	dir_len -= suffix_len;
+	if (memcmp(dir + dir_len, suffix, suffix_len * sizeof(wchar_t)))
+		return 0;
+
+	len = GetEnvironmentVariableW(L"PATH", NULL, 0);
+	if (!len)
+		return 0;
+
+	env = _alloca((dir_len + 5 + len) * sizeof(wchar_t));
+	wcsncpy(env, dir, dir_len);
+	wcscpy(env + dir_len, L"\\bin;");
+	if (!GetEnvironmentVariableW(L"PATH", env + dir_len + 5, len))
+		return 0;
+
+	SetEnvironmentVariableW(L"PATH", env);
+	return 1;
+}
+
+int WINAPI wWinMain(HINSTANCE instance, HINSTANCE previous_instance,
+		    wchar_t *command_line, int show)
+{
+	wchar_t git_command_line[32768];
+	size_t size = sizeof(git_command_line) / sizeof(wchar_t);
+	const wchar_t *needs_quotes = L"";
+	int slash = 0, i;
+
+	STARTUPINFO startup_info = {
+		.dwFlags = STARTF_USESHOWWINDOW,
+		.wShowWindow = SW_HIDE,
+	};
+	PROCESS_INFORMATION process_info = { 0 };
+	DWORD creation_flags = CREATE_UNICODE_ENVIRONMENT |
+		CREATE_NEW_CONSOLE | CREATE_NO_WINDOW;
+	DWORD exit_code;
+
+	/* First, determine the full path of argv[0] */
+	for (i = 0; _wpgmptr[i]; i++)
+		if (_wpgmptr[i] == L' ')
+			needs_quotes = L"\"";
+		else if (_wpgmptr[i] == L'\\')
+			slash = i;
+
+	if (slash + 11 >= sizeof(git_command_line) / sizeof(wchar_t))
+		return 127; /* Too long path */
+
+	/* If it is in Git's exec path, add the bin/ directory to the PATH */
+	extend_path(_wpgmptr, slash);
+
+	/* Then, add the full path of `git.exe` as argv[0] */
+	i = swprintf_s(git_command_line, size, L"%ls%.*ls\\git.exe%ls",
+		       needs_quotes, slash, _wpgmptr, needs_quotes);
+	if (i < 0)
+		return 127; /* Too long path */
+
+	if (*command_line) {
+		/* Now, append the command-line arguments */
+		i = swprintf_s(git_command_line + i, size - i,
+			       L" %ls", command_line);
+		if (i < 0)
+			return 127;
+	}
+
+	startup_info.cb = sizeof(STARTUPINFO);
+
+	startup_info.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+	startup_info.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+	startup_info.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+
+	if (!CreateProcess(NULL, /* infer argv[0] from the command line */
+			   git_command_line, /* modified command line */
+			   NULL, /* inherit process handles? */
+			   NULL, /* inherit thread handles? */
+			   FALSE, /* handles inheritable? */
+			   creation_flags,
+			   NULL, /* use this process' environment */
+			   NULL, /* use this process' working directory */
+			   &startup_info, &process_info))
+		return 129; /* could not start */
+	WaitForSingleObject(process_info.hProcess, INFINITE);
+	if (!GetExitCodeProcess(process_info.hProcess, &exit_code)) {
+		CloseHandle(process_info.hProcess);
+		return 130; /* Could not determine exit code? */
+	}
+
+	return (int)exit_code;
+}

config.c

@@ -1678,9 +1678,11 @@ static int git_config_from_blob_ref(config_fn_t fn,
 
 const char *git_etc_gitconfig(void)
 {
-	static const char *system_wide;
-	if (!system_wide)
+	static char *system_wide;
+	if (!system_wide) {
 		system_wide = system_path(ETC_GITCONFIG);
+		normalize_path_copy(system_wide, system_wide);
+	}
 	return system_wide;
 }
 

config.mak.uname

@@ -433,6 +433,11 @@ ifeq ($(uname_S),Windows)
 	NO_POSIX_GOODIES = UnfortunatelyYes
 	NATIVE_CRLF = YesPlease
 	DEFAULT_HELP_FORMAT = html
+ifeq (/mingw64,$(subst 32,64,$(prefix)))
+	# Move system config into top-level /etc/
+	ETC_GITCONFIG = ../etc/gitconfig
+	ETC_GITATTRIBUTES = ../etc/gitattributes
+endif
 
 	CC = compat/vcbuild/scripts/clink.pl
 	AR = compat/vcbuild/scripts/lib.pl
@@ -443,7 +448,7 @@ ifeq ($(uname_S),Windows)
 		compat/win32/pthread.o compat/win32/syslog.o \
 		compat/win32/trace2_win32_process_info.o \
 		compat/win32/dirent.o
-	COMPAT_CFLAGS = -D__USE_MINGW_ACCESS -DDETECT_MSYS_TTY -DNOGDI -DHAVE_STRING_H -Icompat -Icompat/regex -Icompat/win32 -DSTRIP_EXTENSION=\".exe\"
+	COMPAT_CFLAGS = -D__USE_MINGW_ACCESS -DDETECT_MSYS_TTY -DENSURE_MSYSTEM_IS_SET -DNOGDI -DHAVE_STRING_H -Icompat -Icompat/regex -Icompat/win32 -DSTRIP_EXTENSION=\".exe\"
 	BASIC_LDFLAGS = -IGNORE:4217 -IGNORE:4049 -NOLOGO -ENTRY:wmainCRTStartup -SUBSYSTEM:CONSOLE
 	# invalidcontinue.obj allows Git's source code to close the same file
 	# handle twice, or to access the osfhandle of an already-closed stdout
@@ -481,6 +486,8 @@ else
 endif
 	X = .exe
 
+	EXTRA_PROGRAMS += headless-git$X
+
 compat/msvc.o: compat/msvc.c compat/mingw.c GIT-CFLAGS
 endif
 ifeq ($(uname_S),Interix)
@@ -622,6 +629,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	RC = windres -O coff
 	NATIVE_CRLF = YesPlease
 	X = .exe
+	EXTRA_PROGRAMS += headless-git$X
 ifneq (,$(wildcard ../THIS_IS_MSYSGIT))
 	htmldir = doc/git/html/
 	prefix =
@@ -656,17 +664,22 @@ else
 		endif
 		CC = gcc
 		COMPAT_CFLAGS += -D__USE_MINGW_ANSI_STDIO=0 -DDETECT_MSYS_TTY \
-			-fstack-protector-strong
+			-DENSURE_MSYSTEM_IS_SET -fstack-protector-strong
 		EXTLIBS += -lntdll
 		INSTALL = /bin/install
 		INTERNAL_QSORT = YesPlease
 		HAVE_LIBCHARSET_H = YesPlease
 		NO_GETTEXT =
 		USE_GETTEXT_SCHEME = fallthrough
-		USE_LIBPCRE= YesPlease
-		NO_LIBPCRE1_JIT = UnfortunatelyYes
+		USE_LIBPCRE = YesPlease
 		NO_CURL =
 		USE_NED_ALLOCATOR = YesPlease
+		NO_PYTHON =
+		ifeq (/mingw64,$(subst 32,64,$(prefix)))
+			# Move system config into top-level /etc/
+			ETC_GITCONFIG = ../etc/gitconfig
+			ETC_GITATTRIBUTES = ../etc/gitattributes
+		endif
 	else
 		COMPAT_CFLAGS += -D__USE_MINGW_ANSI_STDIO
 		NO_CURL = YesPlease
@@ -697,7 +710,7 @@ vcxproj:
 	# Make .vcxproj files and add them
 	unset QUIET_GEN QUIET_BUILT_IN; \
 	perl contrib/buildsystems/generate -g Vcxproj
-	git add -f git.sln {*,*/lib,t/helper/*}/*.vcxproj
+	git add -f git.sln {*,*/lib.proj,t/helper/*}/*.vcxproj
 
 	# Generate the LinkOrCopyBuiltins.targets and LinkOrCopyRemoteHttp.targets file
 	(echo '<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">' && \
@@ -707,7 +720,7 @@ vcxproj:
 	   echo '    <Copy SourceFiles="$$(OutDir)\git.exe" DestinationFiles="$$(OutDir)\'"$$name"'" SkipUnchangedFiles="true" UseHardlinksIfPossible="true" />'; \
 	 done && \
 	 echo '  </Target>' && \
-	 echo '</Project>') >git/LinkOrCopyBuiltins.targets
+	 echo '</Project>') >git.proj/LinkOrCopyBuiltins.targets
 	(echo '<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">' && \
 	 echo '  <Target Name="CopyBuiltins_AfterBuild" AfterTargets="AfterBuild">' && \
 	 for name in $(REMOTE_CURL_ALIASES); \
@@ -715,8 +728,8 @@ vcxproj:
 	   echo '    <Copy SourceFiles="$$(OutDir)\'"$(REMOTE_CURL_PRIMARY)"'" DestinationFiles="$$(OutDir)\'"$$name"'" SkipUnchangedFiles="true" UseHardlinksIfPossible="true" />'; \
 	 done && \
 	 echo '  </Target>' && \
-	 echo '</Project>') >git-remote-http/LinkOrCopyRemoteHttp.targets
-	git add -f git/LinkOrCopyBuiltins.targets git-remote-http/LinkOrCopyRemoteHttp.targets
+	 echo '</Project>') >git-remote-http.proj/LinkOrCopyRemoteHttp.targets
+	git add -f git.proj/LinkOrCopyBuiltins.targets git-remote-http.proj/LinkOrCopyRemoteHttp.targets
 
 	# Add command-list.h and config-list.h
 	$(MAKE) MSVC=1 SKIP_VCPKG=1 prefix=/mingw64 config-list.h command-list.h

contrib/buildsystems/CMakeLists.txt

@@ -52,12 +52,16 @@ if(WIN32)
 	set(VCPKG_DIR "${CMAKE_SOURCE_DIR}/compat/vcbuild/vcpkg")
 	if(MSVC AND NOT EXISTS ${VCPKG_DIR})
 		message("Initializing vcpkg and building the Git's dependencies (this will take a while...)")
-		execute_process(COMMAND ${CMAKE_SOURCE_DIR}/compat/vcbuild/vcpkg_install.bat)
+		execute_process(COMMAND ${CMAKE_SOURCE_DIR}/compat/vcbuild/vcpkg_install.bat ${VCPKG_ARCH})
 	endif()
-	list(APPEND CMAKE_PREFIX_PATH "${VCPKG_DIR}/installed/x64-windows")
+	list(APPEND CMAKE_PREFIX_PATH "${VCPKG_DIR}/installed/${VCPKG_ARCH}")
 
 	# In the vcpkg edition, we need this to be able to link to libcurl
 	set(CURL_NO_CURL_CMAKE ON)
+
+	# Copy the necessary vcpkg DLLs (like iconv) to the install dir
+	set(X_VCPKG_APPLOCAL_DEPS_INSTALL ON)
+	set(CMAKE_TOOLCHAIN_FILE ${VCPKG_DIR}/scripts/buildsystems/vcpkg.cmake CACHE STRING "Vcpkg toolchain file")
 endif()
 
 find_program(SH_EXE sh PATHS "C:/Program Files/Git/bin")
@@ -642,6 +646,9 @@ if(WIN32)
 	else()
 		message(FATAL_ERROR "Unhandled compiler: ${CMAKE_C_COMPILER_ID}")
 	endif()
+
+	add_executable(headless-git ${CMAKE_SOURCE_DIR}/compat/win32/headless.c)
+	target_link_options(headless-git PUBLIC /NOLOGO /ENTRY:wWinMainCRTStartup /SUBSYSTEM:WINDOWS)
 elseif(UNIX)
 	target_link_libraries(common-main pthread rt)
 endif()
@@ -807,15 +814,19 @@ list(TRANSFORM git_shell_scripts PREPEND "${CMAKE_BINARY_DIR}/")
 list(TRANSFORM git_perl_scripts PREPEND "${CMAKE_BINARY_DIR}/")
 
 #install
-install(TARGETS git git-shell
+foreach(program ${PROGRAMS_BUILT})
+if(${program} STREQUAL git OR ${program} STREQUAL git-shell)
+install(TARGETS ${program}
 	RUNTIME DESTINATION bin)
+else()
+install(TARGETS ${program}
+	RUNTIME DESTINATION libexec/git-core)
+endif()
+endforeach()
+
 install(PROGRAMS ${CMAKE_BINARY_DIR}/git-cvsserver
 	DESTINATION bin)
 
-list(REMOVE_ITEM PROGRAMS_BUILT git git-shell)
-install(TARGETS ${PROGRAMS_BUILT}
-	RUNTIME DESTINATION libexec/git-core)
-
 set(bin_links
 	git-receive-pack git-upload-archive git-upload-pack)
 
@@ -828,12 +839,12 @@ install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git-shell${EXE_EXTENS
 
 foreach(b ${git_links})
 	string(REPLACE "${CMAKE_BINARY_DIR}" "" b ${b})
-	install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/libexec/git-core/${b}${EXE_EXTENSION})")
+	install(CODE "file(CREATE_LINK ${CMAKE_INSTALL_PREFIX}/bin/git${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/libexec/git-core/${b})")
 endforeach()
 
 foreach(b ${git_http_links})
 	string(REPLACE "${CMAKE_BINARY_DIR}" "" b ${b})
-	install(CODE "file(CREATE_LINK  ${CMAKE_INSTALL_PREFIX}/libexec/git-core/git-remote-http${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/libexec/git-core/${b}${EXE_EXTENSION})")
+	install(CODE "file(CREATE_LINK  ${CMAKE_INSTALL_PREFIX}/libexec/git-core/git-remote-http${EXE_EXTENSION} ${CMAKE_INSTALL_PREFIX}/libexec/git-core/${b})")
 endforeach()
 
 install(PROGRAMS ${git_shell_scripts} ${git_perl_scripts} ${CMAKE_BINARY_DIR}/git-p4
@@ -961,7 +972,7 @@ file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_GETTEXT='${NO_GETTEXT}'\n"
 file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "RUNTIME_PREFIX='${RUNTIME_PREFIX}'\n")
 file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_PYTHON='${NO_PYTHON}'\n")
 if(WIN32)
-	file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "PATH=\"$PATH:$TEST_DIRECTORY/../compat/vcbuild/vcpkg/installed/x64-windows/bin\"\n")
+	file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "PATH=\"$PATH:$TEST_DIRECTORY/../compat/vcbuild/vcpkg/installed/${VCPKG_ARCH}/bin\"\n")
 endif()
 
 #Make the tests work when building out of the source tree

contrib/buildsystems/Generators/Vcxproj.pm

@@ -58,8 +58,8 @@ sub createProject {
     my $uuid = generate_guid($name);
     $$build_structure{"$prefix${target}_GUID"} = $uuid;
     my $vcxproj = $target;
-    $vcxproj =~ s/(.*\/)?(.*)/$&\/$2.vcxproj/;
-    $vcxproj =~ s/([^\/]*)(\/lib)\/(lib.vcxproj)/$1$2\/$1_$3/;
+    $vcxproj =~ s/(.*\/)?(.*)/$&.proj\/$2.vcxproj/;
+    $vcxproj =~ s/([^\/]*)(\/lib\.proj)\/(lib.vcxproj)/$1$2\/$1_$3/;
     $$build_structure{"$prefix${target}_VCXPROJ"} = $vcxproj;
 
     my @srcs = sort(map("$rel_dir\\$_", @{$$build_structure{"$prefix${name}_SOURCES"}}));
@@ -89,7 +89,9 @@ sub createProject {
     $defines =~ s/>/>/g;
     $defines =~ s/\'//g;
 
-    die "Could not create the directory $target for $label project!\n" unless (-d "$target" || mkdir "$target");
+    my $dir = $vcxproj;
+    $dir =~ s/\/[^\/]*$//;
+    die "Could not create the directory $dir for $label project!\n" unless (-d "$dir" || mkdir "$dir");
 
     open F, ">$vcxproj" or die "Could not open $vcxproj for writing!\n";
     binmode F, ":crlf :utf8";
@@ -114,12 +116,21 @@ sub createProject {
       <Configuration>Release</Configuration>
       <Platform>x64</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
     <ProjectGuid>$uuid</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <VCPKGArch Condition="'\$(Platform)'=='Win32'">x86-windows</VCPKGArch>
-    <VCPKGArch Condition="'\$(Platform)'!='Win32'">x64-windows</VCPKGArch>
+    <VCPKGArch Condition="'\$(Platform)'=='x64'">x64-windows</VCPKGArch>
+    <VCPKGArch Condition="'\$(Platform)'=='ARM64'">arm64-windows</VCPKGArch>
     <VCPKGArchDirectory>$cdup\\compat\\vcbuild\\vcpkg\\installed\\\$(VCPKGArch)</VCPKGArchDirectory>
     <VCPKGBinDirectory Condition="'\$(Configuration)'=='Debug'">\$(VCPKGArchDirectory)\\debug\\bin</VCPKGBinDirectory>
     <VCPKGLibDirectory Condition="'\$(Configuration)'=='Debug'">\$(VCPKGArchDirectory)\\debug\\lib</VCPKGLibDirectory>
@@ -140,7 +151,7 @@ sub createProject {
   </PropertyGroup>
   <PropertyGroup>
     <ConfigurationType>$config_type</ConfigurationType>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v142</PlatformToolset>
     <!-- <CharacterSet>UTF-8</CharacterSet> -->
     <OutDir>..\\</OutDir>
     <!-- <IntDir>\$(ProjectDir)\$(Configuration)\\</IntDir> -->
@@ -184,7 +195,7 @@ EOM
     <PreBuildEvent Condition="!Exists('$cdup\\compat\\vcbuild\\vcpkg\\installed\\\$(VCPKGArch)\\include\\openssl\\ssl.h')">
       <Message>Initialize VCPKG</Message>
       <Command>del "$cdup\\compat\\vcbuild\\vcpkg"</Command>
-      <Command>call "$cdup\\compat\\vcbuild\\vcpkg_install.bat"</Command>
+      <Command>call "$cdup\\compat\\vcbuild\\vcpkg_install.bat" \$(VCPKGArch)</Command>
     </PreBuildEvent>
 EOM
     }
@@ -236,14 +247,14 @@ EOM
 
       print F << "EOM";
   <ItemGroup>
-    <ProjectReference Include="$cdup\\libgit\\libgit.vcxproj">
+    <ProjectReference Include="$cdup\\libgit.proj\\libgit.vcxproj">
       <Project>$uuid_libgit</Project>
       <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
     </ProjectReference>
 EOM
       if (!($name =~ 'xdiff')) {
         print F << "EOM";
-    <ProjectReference Include="$cdup\\xdiff\\lib\\xdiff_lib.vcxproj">
+    <ProjectReference Include="$cdup\\xdiff\\lib.proj\\xdiff_lib.vcxproj">
       <Project>$uuid_xdiff_lib</Project>
       <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
     </ProjectReference>
@@ -252,7 +263,7 @@ EOM
       if ($name =~ /(test-(line-buffer|svn-fe)|^git-remote-testsvn)\.exe$/) {
         my $uuid_vcs_svn_lib = $$build_structure{"LIBS_vcs-svn/lib_GUID"};
         print F << "EOM";
-    <ProjectReference Include="$cdup\\vcs-svn\\lib\\vcs-svn_lib.vcxproj">
+    <ProjectReference Include="$cdup\\vcs-svn\\lib.proj\\vcs-svn_lib.vcxproj">
       <Project>$uuid_vcs_svn_lib</Project>
       <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
     </ProjectReference>
@@ -329,7 +340,7 @@ sub createGlueProject {
 	my $vcxproj = $build_structure{"APPS_${appname}_VCXPROJ"};
 	$vcxproj =~ s/\//\\/g;
         $appname =~ s/.*\///;
-        print F "\"${appname}\", \"${vcxproj}\", \"${uuid}\"";
+        print F "\"${appname}.proj\", \"${vcxproj}\", \"${uuid}\"";
         print F "$SLN_POST";
     }
     foreach (@libs) {
@@ -339,15 +350,17 @@ sub createGlueProject {
         my $vcxproj = $build_structure{"LIBS_${libname}_VCXPROJ"};
 	$vcxproj =~ s/\//\\/g;
         $libname =~ s/\//_/g;
-        print F "\"${libname}\", \"${vcxproj}\", \"${uuid}\"";
+        print F "\"${libname}.proj\", \"${vcxproj}\", \"${uuid}\"";
         print F "$SLN_POST";
     }
 
     print F << "EOM";
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|ARM64 = Debug|ARM64
 		Debug|x64 = Debug|x64
 		Debug|x86 = Debug|x86
+		Release|ARM64 = Release|ARM64
 		Release|x64 = Release|x64
 		Release|x86 = Release|x86
 	EndGlobalSection
@@ -358,10 +371,14 @@ EOM
     foreach (@apps) {
         my $appname = $_;
         my $uuid = $build_structure{"APPS_${appname}_GUID"};
+        print F "\t\t${uuid}.Debug|ARM64.ActiveCfg = Debug|ARM64\n";
+        print F "\t\t${uuid}.Debug|ARM64.Build.0 = Debug|ARM64\n";
         print F "\t\t${uuid}.Debug|x64.ActiveCfg = Debug|x64\n";
         print F "\t\t${uuid}.Debug|x64.Build.0 = Debug|x64\n";
         print F "\t\t${uuid}.Debug|x86.ActiveCfg = Debug|Win32\n";
         print F "\t\t${uuid}.Debug|x86.Build.0 = Debug|Win32\n";
+        print F "\t\t${uuid}.Release|ARM64.ActiveCfg = Release|ARM64\n";
+        print F "\t\t${uuid}.Release|ARM64.Build.0 = Release|ARM64\n";
         print F "\t\t${uuid}.Release|x64.ActiveCfg = Release|x64\n";
         print F "\t\t${uuid}.Release|x64.Build.0 = Release|x64\n";
         print F "\t\t${uuid}.Release|x86.ActiveCfg = Release|Win32\n";
@@ -370,10 +387,14 @@ EOM
     foreach (@libs) {
         my $libname = $_;
         my $uuid = $build_structure{"LIBS_${libname}_GUID"};
+        print F "\t\t${uuid}.Debug|ARM64.ActiveCfg = Debug|ARM64\n";
+        print F "\t\t${uuid}.Debug|ARM64.Build.0 = Debug|ARM64\n";
         print F "\t\t${uuid}.Debug|x64.ActiveCfg = Debug|x64\n";
         print F "\t\t${uuid}.Debug|x64.Build.0 = Debug|x64\n";
         print F "\t\t${uuid}.Debug|x86.ActiveCfg = Debug|Win32\n";
         print F "\t\t${uuid}.Debug|x86.Build.0 = Debug|Win32\n";
+        print F "\t\t${uuid}.Release|ARM64.ActiveCfg = Release|ARM64\n";
+        print F "\t\t${uuid}.Release|ARM64.Build.0 = Release|ARM64\n";
         print F "\t\t${uuid}.Release|x64.ActiveCfg = Release|x64\n";
         print F "\t\t${uuid}.Release|x64.Build.0 = Release|x64\n";
         print F "\t\t${uuid}.Release|x86.ActiveCfg = Release|Win32\n";

contrib/completion/git-prompt.sh

@@ -433,8 +433,8 @@ __git_ps1 ()
 	fi
 
 	local sparse=""
-	if [ -z "${GIT_PS1_COMPRESSSPARSESTATE}" ] &&
-	   [ -z "${GIT_PS1_OMITSPARSESTATE}" ] &&
+	if [ -z "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
+	   [ -z "${GIT_PS1_OMITSPARSESTATE-}" ] &&
 	   [ "$(git config --bool core.sparseCheckout)" = "true" ]; then
 		sparse="|SPARSE"
 	fi
@@ -543,7 +543,7 @@ __git_ps1 ()
 			u="%${ZSH_VERSION+%}"
 		fi
 
-		if [ -n "${GIT_PS1_COMPRESSSPARSESTATE}" ] &&
+		if [ -n "${GIT_PS1_COMPRESSSPARSESTATE-}" ] &&
 		   [ "$(git config --bool core.sparseCheckout)" = "true" ]; then
 			h="?"
 		fi

diffcore-rename.c

@@ -84,6 +84,18 @@ static struct diff_rename_src *register_rename_src(struct diff_filepair *p)
 
 	first = 0;
 	last = rename_src_nr;
+
+	if (last > 0) {
+		struct diff_rename_src *src = &(rename_src[last-1]);
+		int cmp = strcmp(one->path, src->p->one->path);
+		if (!cmp)
+			return src;
+		if (cmp > 0) {
+			first = last;
+			goto append_it;
+		}
+	}
+
 	while (last > first) {
 		int next = first + ((last - first) >> 1);
 		struct diff_rename_src *src = &(rename_src[next]);
@@ -97,6 +109,7 @@ static struct diff_rename_src *register_rename_src(struct diff_filepair *p)
 		first = next+1;
 	}
 
+append_it:
 	/* insert to make it at "first" */
 	ALLOC_GROW(rename_src, rename_src_nr + 1, rename_src_alloc);
 	rename_src_nr++;

git-add--interactive.perl

@@ -174,6 +174,24 @@ sub run_cmd_pipe {
 		die "$^O does not support: @invalid\n" if @invalid;
 		my @args = map { m/ /o ? "\"$_\"": $_ } @_;
 		return qx{@args};
+	} elsif (($^O eq 'MSWin32' || $^O eq 'msys') && (scalar @_ > 200) &&
+			grep $_ eq '--', @_) {
+		use File::Temp qw(tempfile);
+		my ($fhargs, $filename) =
+			tempfile('git-args-XXXXXX', UNLINK => 1);
+
+		my $cmd = 'cat '.$filename.' | xargs -0 -s 20000 ';
+		while ($_[0] ne '--') {
+			$cmd = $cmd . shift(@_) . ' ';
+		}
+
+		shift(@_);
+		print $fhargs join("\0", @_);
+		close($fhargs);
+
+		my $fh = undef;
+		open($fh, '-|', $cmd) or die;
+		return <$fh>;
 	} else {
 		my $fh = undef;
 		open($fh, '-|', @_) or die;

git-compat-util.h

@@ -406,10 +406,18 @@ static inline int git_has_dir_sep(const char *path)
 #define has_dir_sep(path) git_has_dir_sep(path)
 #endif
 
+#ifndef is_mount_point
+#define is_mount_point is_mount_point_via_stat
+#endif
+
 #ifndef query_user_email
 #define query_user_email() NULL
 #endif
 
+#ifndef platform_strbuf_realpath
+#define platform_strbuf_realpath(resolved, path) NULL
+#endif
+
 #ifdef __TANDEM
 #include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)>
 #include <floss.h(floss_getpwuid)>

git-gui/git-gui.sh

@@ -2087,6 +2087,7 @@ set all_icons(U$ui_index)   file_merge
 set all_icons(T$ui_index)   file_statechange
 
 set all_icons(_$ui_workdir) file_plain
+set all_icons(A$ui_workdir) file_plain
 set all_icons(M$ui_workdir) file_mod
 set all_icons(D$ui_workdir) file_question
 set all_icons(U$ui_workdir) file_merge
@@ -2113,6 +2114,7 @@ foreach i {
 		{A_ {mc "Staged for commit"}}
 		{AM {mc "Portions staged for commit"}}
 		{AD {mc "Staged for commit, missing"}}
+		{AA {mc "Intended to be added"}}
 
 		{_D {mc "Missing"}}
 		{D_ {mc "Staged for removal"}}

git-gui/lib/diff.tcl

@@ -582,7 +582,8 @@ proc apply_or_revert_hunk {x y revert} {
 	if {$current_diff_side eq $ui_index} {
 		set failed_msg [mc "Failed to unstage selected hunk."]
 		lappend apply_cmd --reverse --cached
-		if {[string index $mi 0] ne {M}} {
+		set file_state [string index $mi 0]
+		if {$file_state ne {M} && $file_state ne {A}} {
 			unlock_index
 			return
 		}
@@ -595,7 +596,8 @@ proc apply_or_revert_hunk {x y revert} {
 			lappend apply_cmd --cached
 		}
 
-		if {[string index $mi 1] ne {M}} {
+		set file_state [string index $mi 1]
+		if {$file_state ne {M} && $file_state ne {A}} {
 			unlock_index
 			return
 		}
@@ -687,7 +689,8 @@ proc apply_or_revert_range_or_line {x y revert} {
 		set failed_msg [mc "Failed to unstage selected line."]
 		set to_context {+}
 		lappend apply_cmd --reverse --cached
-		if {[string index $mi 0] ne {M}} {
+		set file_state [string index $mi 0]
+		if {$file_state ne {M} && $file_state ne {A}} {
 			unlock_index
 			return
 		}
@@ -702,7 +705,8 @@ proc apply_or_revert_range_or_line {x y revert} {
 			lappend apply_cmd --cached
 		}
 
-		if {[string index $mi 1] ne {M}} {
+		set file_state [string index $mi 1]
+		if {$file_state ne {M} && $file_state ne {A}} {
 			unlock_index
 			return
 		}

gitk-git/gitk

@@ -353,6 +353,16 @@ proc parseviewrevs {view revs} {
     return $ret
 }
 
+# Escapes a list of filter paths to be passed to git log via stdin. Note that
+# paths must not be quoted.
+proc escape_filter_paths {paths} {
+	set escaped [list]
+	foreach path $paths {
+		lappend escaped [string map {\\ \\\\ "\ " "\\\ "} $path]
+	}
+	return $escaped
+}
+
 # Start off a git log process and arrange to read its output
 proc start_rev_list {view} {
     global startmsecs commitidx viewcomplete curview
@@ -405,14 +415,17 @@ proc start_rev_list {view} {
         if {$revs eq {}} {
             return 0
         }
-        set args [concat $vflags($view) $revs]
+        set args $vflags($view)
     } else {
+        set revs {}
         set args $vorigargs($view)
     }
 
     if {[catch {
         set fd [open [concat | git log --no-color -z --pretty=raw $show_notes \
-                        --parents --boundary $args "--" $files] r]
+                        --parents --boundary $args --stdin \
+                        "<<[join [concat $revs "--" \
+                                [escape_filter_paths $files]] "\\n"]"] r]
     } err]} {
         error_popup "[mc "Error executing git log:"] $err"
         return 0
@@ -554,13 +567,20 @@ proc updatecommits {} {
             set revs $newrevs
             set vposids($view) [lsort -unique [concat $oldpos $vposids($view)]]
         }
-        set args [concat $vflags($view) $revs --not $oldpos]
+        set args $vflags($view)
+        foreach r $oldpos {
+                lappend revs "^$r"
+        }
     } else {
+        set revs {}
         set args $vorigargs($view)
     }
     if {[catch {
         set fd [open [concat | git log --no-color -z --pretty=raw $show_notes \
-                        --parents --boundary $args "--" $vfilelimit($view)] r]
+                        --parents --boundary $args --stdin \
+                        "<<[join [concat $revs "--" \
+                                [escape_filter_paths \
+                                        $vfilelimit($view)]] "\\n"]"] r]
     } err]} {
         error_popup "[mc "Error executing git log:"] $err"
         return
@@ -10228,10 +10248,16 @@ proc getallcommits {} {
             foreach id $seeds {
                 lappend ids "^$id"
             }
+            lappend ids "--"
         }
     }
     if {$ids ne {}} {
-        set fd [open [concat $cmd $ids] r]
+        if {$ids eq "--all"} {
+            set cmd [concat $cmd "--all"]
+        } else {
+            set cmd [concat $cmd --stdin "<<[join $ids "\\n"]"]
+        }
+        set fd [open $cmd r]
         fconfigure $fd -blocking 0
         incr allcommits
         nowbusy allcommits

http.c

@@ -165,7 +165,13 @@ static char *cached_accept_language;
 
 static char *http_ssl_backend;
 
-static int http_schannel_check_revoke = 1;
+static int http_schannel_check_revoke_mode =
+#ifdef CURLSSLOPT_REVOKE_BEST_EFFORT
+	CURLSSLOPT_REVOKE_BEST_EFFORT;
+#else
+	CURLSSLOPT_NO_REVOKE;
+#endif
+
 /*
  * With the backend being set to `schannel`, setting sslCAinfo would override
  * the Certificate Store in cURL v7.60.0 and later, which is not what we want
@@ -330,7 +336,19 @@ static int http_options(const char *var, const char *value, void *cb)
 	}
 
 	if (!strcmp("http.schannelcheckrevoke", var)) {
-		http_schannel_check_revoke = git_config_bool(var, value);
+		if (value && !strcmp(value, "best-effort")) {
+			http_schannel_check_revoke_mode =
+#ifdef CURLSSLOPT_REVOKE_BEST_EFFORT
+				CURLSSLOPT_REVOKE_BEST_EFFORT;
+#else
+				CURLSSLOPT_NO_REVOKE;
+			warning(_("%s=%s unsupported by current cURL"),
+				var, value);
+#endif
+		} else
+			http_schannel_check_revoke_mode =
+				(git_config_bool(var, value) ?
+				 0 : CURLSSLOPT_NO_REVOKE);
 		return 0;
 	}
 
@@ -903,9 +921,9 @@ static CURL *get_curl_handle(void)
 #endif
 
 	if (http_ssl_backend && !strcmp("schannel", http_ssl_backend) &&
-	    !http_schannel_check_revoke) {
+	    http_schannel_check_revoke_mode) {
 #if LIBCURL_VERSION_NUM >= 0x072c00
-		curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE);
+		curl_easy_setopt(result, CURLOPT_SSL_OPTIONS, http_schannel_check_revoke_mode);
 #else
 		warning(_("CURLSSLOPT_NO_REVOKE not supported with cURL < 7.44.0"));
 #endif

path.c

@@ -12,6 +12,7 @@
 #include "packfile.h"
 #include "object-store.h"
 #include "lockfile.h"
+#include "exec-cmd.h"
 
 static int get_st_mode_bits(const char *path, int *mode)
 {
@@ -732,6 +733,10 @@ char *expand_user_path(const char *path, int real_home)
 
 	if (path == NULL)
 		goto return_null;
+#ifdef __MINGW32__
+	if (path[0] == '/')
+		return system_path(path + 1);
+#endif
 	if (path[0] == '~') {
 		const char *first_slash = strchrnul(path, '/');
 		const char *username = path + 1;
@@ -1289,6 +1294,45 @@ char *strip_path_suffix(const char *path, const char *suffix)
 	return offset == -1 ? NULL : xstrndup(path, offset);
 }
 
+int is_mount_point_via_stat(struct strbuf *path)
+{
+	size_t len = path->len;
+	unsigned int current_dev;
+	struct stat st;
+
+	if (!strcmp("/", path->buf))
+		return 1;
+
+	strbuf_addstr(path, "/.");
+	if (lstat(path->buf, &st)) {
+		/*
+		 * If we cannot access the current directory, we cannot say
+		 * that it is a bind mount.
+		 */
+		strbuf_setlen(path, len);
+		return 0;
+	}
+	current_dev = st.st_dev;
+
+	/* Now look at the parent directory */
+	strbuf_addch(path, '.');
+	if (lstat(path->buf, &st)) {
+		/*
+		 * If we cannot access the parent directory, we cannot say
+		 * that it is a bind mount.
+		 */
+		strbuf_setlen(path, len);
+		return 0;
+	}
+	strbuf_setlen(path, len);
+
+	/*
+	 * If the device ID differs between current and parent directory,
+	 * then it is a bind mount.
+	 */
+	return current_dev != st.st_dev;
+}
+
 int daemon_avoid_alias(const char *p)
 {
 	int sl, ndot;

prompt.c

@@ -80,7 +80,7 @@ int git_read_line_interactively(struct strbuf *line)
 	int ret;
 
 	fflush(stdout);
-	ret = strbuf_getline_lf(line, stdin);
+	ret = strbuf_getline(line, stdin);
 	if (ret != EOF)
 		strbuf_trim_trailing_newline(line);
 

send-pack.c

@@ -39,6 +39,16 @@ int option_parse_push_signed(const struct option *opt,
 	die("bad %s argument: %s", opt->long_name, arg);
 }
 
+static int config_use_sideband = 1;
+
+static int send_pack_config(const char *var, const char *value, void *unused)
+{
+	if (!strcmp("sendpack.sideband", var))
+		config_use_sideband = git_config_bool(var, value);
+
+	return 0;
+}
+
 static void feed_object(const struct object_id *oid, FILE *fh, int negative)
 {
 	if (negative &&
@@ -437,6 +447,7 @@ int send_pack(struct send_pack_args *args,
 	const char *push_cert_nonce = NULL;
 	struct packet_reader reader;
 
+	git_config(send_pack_config, NULL);
 	git_config_get_bool("transfer.advertisesid", &advertise_sid);
 
 	/* Does the other end support the reporting? */
@@ -448,7 +459,7 @@ int send_pack(struct send_pack_args *args,
 		allow_deleting_refs = 1;
 	if (server_supports("ofs-delta"))
 		args->use_ofs_delta = 1;
-	if (server_supports("side-band-64k"))
+	if (config_use_sideband && server_supports("side-band-64k"))
 		use_sideband = 1;
 	if (server_supports("quiet"))
 		quiet_supported = 1;

t/t0014-alias.sh

@@ -38,10 +38,10 @@ test_expect_success 'looping aliases - internal execution' '
 #'
 
 test_expect_success 'run-command formats empty args properly' '
-    test_must_fail env GIT_TRACE=1 git frotz a "" b " " c 2>actual.raw &&
-    sed -ne "/run_command:/s/.*trace: run_command: //p" actual.raw >actual &&
-    echo "git-frotz a '\'''\'' b '\'' '\'' c" >expect &&
-    test_cmp expect actual
+	test_must_fail env GIT_TRACE=1 git frotz a "" b " " c 2>actual.raw &&
+	sed -ne "/run_command:/s/.*trace: run_command: //p" actual.raw >actual &&
+	echo "git-frotz a '\'''\'' b '\'' '\'' c" >expect &&
+	test_cmp expect actual
 '
 
 test_done

t/t0060-path-utils.sh

@@ -495,4 +495,42 @@ test_expect_success MINGW 'is_valid_path() on Windows' '
 		"PRN./abc"
 '
 
+test_expect_success MINGW 'MSYSTEM/PATH is adjusted if necessary' '
+	mkdir -p "$HOME"/bin pretend/mingw64/bin \
+		pretend/mingw64/libexec/git-core pretend/usr/bin &&
+	cp "$GIT_EXEC_PATH"/git.exe pretend/mingw64/bin/ &&
+	cp "$GIT_EXEC_PATH"/git.exe pretend/mingw64/libexec/git-core/ &&
+	echo "env | grep MSYSTEM=" | write_script "$HOME"/bin/git-test-home &&
+	echo "echo mingw64" | write_script pretend/mingw64/bin/git-test-bin &&
+	echo "echo usr" | write_script pretend/usr/bin/git-test-bin2 &&
+
+	(
+		MSYSTEM= &&
+		GIT_EXEC_PATH= &&
+		pretend/mingw64/libexec/git-core/git.exe test-home >actual &&
+		pretend/mingw64/libexec/git-core/git.exe test-bin >>actual &&
+		pretend/mingw64/bin/git.exe test-bin2 >>actual
+	) &&
+	test_write_lines MSYSTEM=$MSYSTEM mingw64 usr >expect &&
+	test_cmp expect actual
+'
+
+test_lazy_prereq RUNTIME_PREFIX '
+	test true = "$RUNTIME_PREFIX"
+'
+
+test_lazy_prereq CAN_EXEC_IN_PWD '
+	cp "$GIT_EXEC_PATH"/git$X ./ &&
+	./git rev-parse
+'
+
+test_expect_success RUNTIME_PREFIX,CAN_EXEC_IN_PWD 'RUNTIME_PREFIX works' '
+	mkdir -p pretend/git pretend/libexec/git-core &&
+	echo "echo HERE" | write_script pretend/libexec/git-core/git-here &&
+	cp "$GIT_EXEC_PATH"/git$X pretend/git/ &&
+	GIT_EXEC_PATH= ./pretend/git/git here >actual &&
+	echo HERE >expect &&
+	test_cmp expect actual
+'
+
 test_done

t/t3700-add.sh

@@ -423,4 +423,15 @@ test_expect_success CASE_INSENSITIVE_FS 'path is case-insensitive' '
 	git add "$downcased"
 '
 
+test_expect_success MINGW 'can add files via NTFS junctions' '
+	test_when_finished "cmd //c rmdir junction && rm -rf target" &&
+	test_create_repo target &&
+	cmd //c "mklink /j junction target" &&
+	>target/via-junction &&
+	git -C junction add "$(pwd)/junction/via-junction" &&
+	echo via-junction >expect &&
+	git -C target diff --cached --name-only >actual &&
+	test_cmp expect actual
+'
+
 test_done

t/t3701-add-interactive.sh

@@ -944,6 +944,27 @@ test_expect_success 'checkout -p patch editing of added file' '
 	)
 '
 
+test_expect_success EXPENSIVE 'add -i with a lot of files' '
+	git reset --hard &&
+	x160=0123456789012345678901234567890123456789 &&
+	x160=$x160$x160$x160$x160 &&
+	y= &&
+	i=0 &&
+	while test $i -le 200
+	do
+		name=$(printf "%s%03d" $x160 $i) &&
+		echo $name >$name &&
+		git add -N $name &&
+		y="${y}y$LF" &&
+		i=$(($i+1)) ||
+		break
+	done &&
+	echo "$y" | git add -p -- . &&
+	git diff --cached >staged &&
+	test_line_count = 1407 staged &&
+	git reset --hard
+'
+
 test_expect_success 'show help from add--helper' '
 	git reset --hard &&
 	cat >expect <<-EOF &&

t/t5505-remote.sh

@@ -734,8 +734,8 @@ test_expect_success '"remote show" does not show symbolic refs' '
 	(
 		cd three &&
 		git remote show origin >output &&
-		! grep "^ *HEAD$" < output &&
-		! grep -i stale < output
+		! grep "^ *HEAD$" <output &&
+		! grep -i stale <output
 	)
 '
 
@@ -923,6 +923,7 @@ test_expect_success 'migrate a remote from named file in $GIT_DIR/branches' '
 	(
 		cd six &&
 		git remote rm origin &&
+		mkdir -p .git/branches &&
 		echo "$origin_url#main" >.git/branches/origin &&
 		git remote rename origin origin &&
 		test_path_is_missing .git/branches/origin &&
@@ -937,7 +938,8 @@ test_expect_success 'migrate a remote from named file in $GIT_DIR/branches (2)'
 	(
 		cd seven &&
 		git remote rm origin &&
-		echo "quux#foom" > .git/branches/origin &&
+		mkdir -p .git/branches &&
+		echo "quux#foom" >.git/branches/origin &&
 		git remote rename origin origin &&
 		test_path_is_missing .git/branches/origin &&
 		test "$(git config remote.origin.url)" = "quux" &&

t/t5516-fetch-push.sh

@@ -872,7 +872,8 @@ test_expect_success 'fetch with branches' '
 	mk_empty testrepo &&
 	git branch second $the_first_commit &&
 	git checkout second &&
-	echo ".." > testrepo/.git/branches/branch1 &&
+	mkdir -p testrepo/.git/branches &&
+	echo ".." >testrepo/.git/branches/branch1 &&
 	(
 		cd testrepo &&
 		git fetch branch1 &&
@@ -885,7 +886,8 @@ test_expect_success 'fetch with branches' '
 
 test_expect_success 'fetch with branches containing #' '
 	mk_empty testrepo &&
-	echo "..#second" > testrepo/.git/branches/branch2 &&
+	mkdir -p testrepo/.git/branches &&
+	echo "..#second" >testrepo/.git/branches/branch2 &&
 	(
 		cd testrepo &&
 		git fetch branch2 &&
@@ -899,7 +901,8 @@ test_expect_success 'fetch with branches containing #' '
 test_expect_success 'push with branches' '
 	mk_empty testrepo &&
 	git checkout second &&
-	echo "testrepo" > .git/branches/branch1 &&
+	mkdir -p .git/branches &&
+	echo "testrepo" >.git/branches/branch1 &&
 	git push branch1 &&
 	(
 		cd testrepo &&
@@ -911,7 +914,8 @@ test_expect_success 'push with branches' '
 
 test_expect_success 'push with branches containing #' '
 	mk_empty testrepo &&
-	echo "testrepo#branch3" > .git/branches/branch2 &&
+	mkdir -p .git/branches &&
+	echo "testrepo#branch3" >.git/branches/branch2 &&
 	git push branch2 &&
 	(
 		cd testrepo &&
@@ -1436,7 +1440,7 @@ EOF
 	git init no-thin &&
 	git --git-dir=no-thin/.git config receive.unpacklimit 0 &&
 	git push no-thin/.git refs/heads/master:refs/heads/foo &&
-	echo modified >> path1 &&
+	echo modified >>path1 &&
 	git commit -am modified &&
 	git repack -adf &&
 	rcvpck="git receive-pack --reject-thin-pack-for-testing" &&

t/t5580-unc-paths.sh

@@ -17,14 +17,11 @@ fi
 UNCPATH="$(winpwd)"
 case "$UNCPATH" in
 [A-Z]:*)
+	WITHOUTDRIVE="${UNCPATH#?:}"
 	# Use administrative share e.g. \\localhost\C$\git-sdk-64\usr\src\git
 	# (we use forward slashes here because MSYS2 and Git accept them, and
 	# they are easier on the eyes)
-	UNCPATH="//localhost/${UNCPATH%%:*}\$/${UNCPATH#?:}"
-	test -d "$UNCPATH" || {
-		skip_all='could not access administrative share; skipping'
-		test_done
-	}
+	UNCPATH="//localhost/${UNCPATH%%:*}\$$WITHOUTDRIVE"
 	;;
 *)
 	skip_all='skipping UNC path tests, cannot determine current path as UNC'
@@ -32,6 +29,18 @@ case "$UNCPATH" in
 	;;
 esac
 
+test_expect_success 'clone into absolute path lacking a drive prefix' '
+	USINGBACKSLASHES="$(echo "$WITHOUTDRIVE"/without-drive-prefix |
+		tr / \\\\)" &&
+	git clone . "$USINGBACKSLASHES" &&
+	test -f without-drive-prefix/.git/HEAD
+'
+
+test -d "$UNCPATH" || {
+	skip_all='could not access administrative share; skipping'
+	test_done
+}
+
 test_expect_success setup '
 	test_commit initial
 '

t/t5601-clone.sh

@@ -68,6 +68,13 @@ test_expect_success 'clone respects GIT_WORK_TREE' '
 
 '
 
+test_expect_success CASE_INSENSITIVE_FS 'core.worktree is not added due to path case' '
+
+	mkdir UPPERCASE &&
+	git clone src "$(pwd)/uppercase" &&
+	test "unset" = "$(git -C UPPERCASE config --default unset core.worktree)"
+'
+
 test_expect_success 'clone from hooks' '
 
 	test_create_repo r0 &&

t/t5801-remote-helpers.sh

@@ -236,7 +236,7 @@ test_expect_success 'push update refs failure' '
 	echo "update fail" >>file &&
 	git commit -a -m "update fail" &&
 	git rev-parse --verify testgit/origin/heads/update >expect &&
-	test_expect_code 1 env GIT_REMOTE_TESTGIT_FAILURE="non-fast forward" \
+	test_must_fail env GIT_REMOTE_TESTGIT_FAILURE="non-fast forward" \
 		git push origin update &&
 	git rev-parse --verify testgit/origin/heads/update >actual &&
 	test_cmp expect actual

t/t7300-clean.sh

@@ -746,4 +746,14 @@ test_expect_success 'clean untracked paths by pathspec' '
 	test_must_be_empty actual
 '
 
+test_expect_success MINGW 'clean does not traverse mount points' '
+	mkdir target &&
+	>target/dont-clean-me &&
+	git init with-mountpoint &&
+	cmd //c "mklink /j with-mountpoint\\mountpoint target" &&
+	git -C with-mountpoint clean -dfx &&
+	test_path_is_missing with-mountpoint/mountpoint &&
+	test_path_is_file target/dont-clean-me
+'
+
 test_done

t/t7502-commit-porcelain.sh

@@ -271,6 +271,48 @@ test_expect_success 'cleanup commit messages (scissors option,-F,-e, scissors on
 	test_must_be_empty actual
 '
 
+test_expect_success 'helper-editor' '
+
+	write_script lf-to-crlf.sh <<-\EOF
+	sed "s/\$/Q/" <"$1" | tr Q "\\015" >"$1".new &&
+	mv -f "$1".new "$1"
+	EOF
+'
+
+test_expect_success 'cleanup commit messages (scissors option,-F,-e, CR/LF line endings)' '
+
+	test_config core.editor "\"$PWD/lf-to-crlf.sh\"" &&
+	scissors="# ------------------------ >8 ------------------------" &&
+
+	test_write_lines >text \
+	"# Keep this comment" "" " $scissors" \
+	"# Keep this comment, too" "$scissors" \
+	"# Remove this comment" "$scissors" \
+	"Remove this comment, too" &&
+
+	test_write_lines >expect \
+	"# Keep this comment" "" " $scissors" \
+	"# Keep this comment, too" &&
+
+	git commit --cleanup=scissors -e -F text --allow-empty &&
+	git cat-file -p HEAD >raw &&
+	sed -e "1,/^\$/d" raw >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'cleanup commit messages (scissors option,-F,-e, scissors on first line, CR/LF line endings)' '
+
+	scissors="# ------------------------ >8 ------------------------" &&
+	test_write_lines >text \
+	"$scissors" \
+	"# Remove this comment and any following lines" &&
+	cp text /tmp/test2-text &&
+	git commit --cleanup=scissors -e -F text --allow-empty --allow-empty-message &&
+	git cat-file -p HEAD >raw &&
+	sed -e "1,/^\$/d" raw >actual &&
+	test_must_be_empty actual
+'
+
 test_expect_success 'cleanup commit messages (strip option,-F)' '
 
 	echo >>negative &&

t/t7900-maintenance.sh

@@ -7,6 +7,19 @@ test_description='git maintenance builtin'
 GIT_TEST_COMMIT_GRAPH=0
 GIT_TEST_MULTI_PACK_INDEX=0
 
+test_lazy_prereq XMLLINT '
+	xmllint --version
+'
+
+test_xmllint () {
+	if test_have_prereq XMLLINT
+	then
+		xmllint --noout "$@"
+	else
+		true
+	fi
+}
+
 test_expect_success 'help text' '
 	test_expect_code 129 git maintenance -h 2>err &&
 	test_i18ngrep "usage: git maintenance <subcommand>" err &&
@@ -419,7 +432,7 @@ test_expect_success !MINGW 'register and unregister with regex metacharacters' '
 '
 
 test_expect_success 'start from empty cron table' '
-	GIT_TEST_CRONTAB="test-tool crontab cron.txt" git maintenance start &&
+	GIT_TEST_MAINT_SCHEDULER="crontab:test-tool crontab cron.txt" git maintenance start &&
 
 	# start registers the repo
 	git config --get --global --fixed-value maintenance.repo "$(pwd)" &&
@@ -430,19 +443,19 @@ test_expect_success 'start from empty cron table' '
 '
 
 test_expect_success 'stop from existing schedule' '
-	GIT_TEST_CRONTAB="test-tool crontab cron.txt" git maintenance stop &&
+	GIT_TEST_MAINT_SCHEDULER="crontab:test-tool crontab cron.txt" git maintenance stop &&
 
 	# stop does not unregister the repo
 	git config --get --global --fixed-value maintenance.repo "$(pwd)" &&
 
 	# Operation is idempotent
-	GIT_TEST_CRONTAB="test-tool crontab cron.txt" git maintenance stop &&
+	GIT_TEST_MAINT_SCHEDULER="crontab:test-tool crontab cron.txt" git maintenance stop &&
 	test_must_be_empty cron.txt
 '
 
 test_expect_success 'start preserves existing schedule' '
 	echo "Important information!" >cron.txt &&
-	GIT_TEST_CRONTAB="test-tool crontab cron.txt" git maintenance start &&
+	GIT_TEST_MAINT_SCHEDULER="crontab:test-tool crontab cron.txt" git maintenance start &&
 	grep "Important information!" cron.txt
 '
 
@@ -457,11 +470,94 @@ test_expect_success 'magic markers are correct' '
 
 test_expect_success 'stop preserves surrounding schedule' '
 	echo "Crucial information!" >>cron.txt &&
-	GIT_TEST_CRONTAB="test-tool crontab cron.txt" git maintenance stop &&
+	GIT_TEST_MAINT_SCHEDULER="crontab:test-tool crontab cron.txt" git maintenance stop &&
 	grep "Important information!" cron.txt &&
 	grep "Crucial information!" cron.txt
 '
 
+test_expect_success 'start and stop macOS maintenance' '
+	# ensure $HOME can be compared against hook arguments on all platforms
+	pfx=$(cd "$HOME" && pwd) &&
+
+	write_script print-args <<-\EOF &&
+	echo $* | sed "s:gui/[0-9][0-9]*:gui/[UID]:" >>args
+	EOF
+
+	rm -f args &&
+	GIT_TEST_MAINT_SCHEDULER=launchctl:./print-args git maintenance start &&
+
+	# start registers the repo
+	git config --get --global maintenance.repo "$(pwd)" &&
+
+	ls "$HOME/Library/LaunchAgents" >actual &&
+	cat >expect <<-\EOF &&
+	org.git-scm.git.daily.plist
+	org.git-scm.git.hourly.plist
+	org.git-scm.git.weekly.plist
+	EOF
+	test_cmp expect actual &&
+
+	rm -f expect &&
+	for frequency in hourly daily weekly
+	do
+		PLIST="$pfx/Library/LaunchAgents/org.git-scm.git.$frequency.plist" &&
+		test_xmllint "$PLIST" &&
+		grep schedule=$frequency "$PLIST" &&
+		echo "bootout gui/[UID] $PLIST" >>expect &&
+		echo "bootstrap gui/[UID] $PLIST" >>expect || return 1
+	done &&
+	test_cmp expect args &&
+
+	rm -f args &&
+	GIT_TEST_MAINT_SCHEDULER=launchctl:./print-args git maintenance stop &&
+
+	# stop does not unregister the repo
+	git config --get --global maintenance.repo "$(pwd)" &&
+
+	printf "bootout gui/[UID] $pfx/Library/LaunchAgents/org.git-scm.git.%s.plist\n" \
+		hourly daily weekly >expect &&
+	test_cmp expect args &&
+	ls "$HOME/Library/LaunchAgents" >actual &&
+	test_line_count = 0 actual
+'
+
+test_expect_success 'start and stop Windows maintenance' '
+	write_script print-args <<-\EOF &&
+	echo $* >>args
+	while test $# -gt 0
+	do
+		case "$1" in
+		/xml) shift; xmlfile=$1; break ;;
+		*) shift ;;
+		esac
+	done
+	test -z "$xmlfile" || cp "$xmlfile" "$xmlfile.xml"
+	EOF
+
+	rm -f args &&
+	GIT_TEST_MAINT_SCHEDULER="schtasks:./print-args" git maintenance start &&
+
+	# start registers the repo
+	git config --get --global maintenance.repo "$(pwd)" &&
+
+	for frequency in hourly daily weekly
+	do
+		grep "/create /tn Git Maintenance ($frequency) /f /xml" args &&
+		file=$(ls .git/schedule_${frequency}*.xml) &&
+		test_xmllint "$file" || return 1
+	done &&
+
+	rm -f args &&
+	GIT_TEST_MAINT_SCHEDULER="schtasks:./print-args" git maintenance stop &&
+
+	# stop does not unregister the repo
+	git config --get --global maintenance.repo "$(pwd)" &&
+
+	printf "/delete /tn Git Maintenance (%s) /f\n" \
+		hourly daily weekly >expect &&
+	test_cmp expect args
+'
+
 test_expect_success 'register preserves existing strategy' '
 	git config maintenance.strategy none &&
 	git maintenance register &&

t/t9350-fast-export.sh

@@ -747,4 +747,15 @@ test_expect_success 'merge commit gets exported with --import-marks' '
 	)
 '
 
+cat > expected << EOF
+reset refs/heads/master
+from $(git rev-parse master)
+
+EOF
+
+test_expect_failure 'refs are updated even if no commits need to be exported' '
+	git fast-export master..master > actual &&
+	test_cmp expected actual
+'
+
 test_done

t/test-lib.sh

@@ -1713,7 +1713,8 @@ test_lazy_prereq REBASE_P '
 '
 
 # Ensure that no test accidentally triggers a Git command
-# that runs 'crontab', affecting a user's cron schedule.
-# Tests that verify the cron integration must set this locally
+# that runs the actual maintenance scheduler, affecting a user's
+# system permanently.
+# Tests that verify the scheduler integration must set this locally
 # to avoid errors.
-GIT_TEST_CRONTAB="exit 1"
+GIT_TEST_MAINT_SCHEDULER="none:exit 1"

transport-helper.c

@@ -16,6 +16,8 @@
 #include "protocol.h"
 
 static int debug;
+/* TODO: put somewhere sensible, e.g. git_transport_options? */
+static int auto_gc = 1;
 
 struct helper_data {
 	const char *name;
@@ -478,10 +480,25 @@ static int get_exporter(struct transport *transport,
 	for (i = 0; i < revlist_args->nr; i++)
 		strvec_push(&fastexport->args, revlist_args->items[i].string);
 
+	strvec_push(&fastexport->args, "--");
+
 	fastexport->git_cmd = 1;
 	return start_command(fastexport);
 }
 
+static void check_helper_status(struct helper_data *data)
+{
+	int pid, status;
+
+	pid = waitpid(data->helper->pid, &status, WNOHANG);
+	if (pid < 0)
+		die("Could not retrieve status of remote helper '%s'",
+		    data->name);
+	if (pid > 0 && WIFEXITED(status))
+		die("Remote helper '%s' died with %d",
+		    data->name, WEXITSTATUS(status));
+}
+
 static int fetch_with_import(struct transport *transport,
 			     int nr_heads, struct ref **to_fetch)
 {
@@ -518,6 +535,7 @@ static int fetch_with_import(struct transport *transport,
 
 	if (finish_command(&fastimport))
 		die(_("error while running fast-import"));
+	check_helper_status(data);
 
 	/*
 	 * The fast-import stream of a remote helper that advertises
@@ -551,6 +569,12 @@ static int fetch_with_import(struct transport *transport,
 		}
 	}
 	strbuf_release(&buf);
+	if (auto_gc) {
+		const char *argv_gc_auto[] = {
+			"gc", "--auto", "--quiet", NULL,
+		};
+		run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
+	}
 	return 0;
 }
 
@@ -1105,6 +1129,7 @@ static int push_refs_with_export(struct transport *transport,
 
 	if (finish_command(&exporter))
 		die(_("error while running fast-export"));
+	check_helper_status(data);
 	if (push_update_refs_status(data, remote_refs, flags))
 		return 1;
 

wt-status.c

@@ -22,7 +22,7 @@
 #define AB_DELAY_WARNING_IN_MS (2 * 1000)
 
 static const char cut_line[] =
-"------------------------ >8 ------------------------\n";
+"------------------------ >8 ------------------------";
 
 static char default_wt_status_colors[][COLOR_MAXLEN] = {
 	GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
@@ -999,15 +999,22 @@ conclude:
 	status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
 }
 
+static inline int starts_with_newline(const char *p)
+{
+    return *p == '\n' || (*p == '\r' && p[1] == '\n');
+}
+
 size_t wt_status_locate_end(const char *s, size_t len)
 {
 	const char *p;
 	struct strbuf pattern = STRBUF_INIT;
 
 	strbuf_addf(&pattern, "\n%c %s", comment_line_char, cut_line);
-	if (starts_with(s, pattern.buf + 1))
+	if (starts_with(s, pattern.buf + 1) &&
+	    starts_with_newline(s + pattern.len - 1))
 		len = 0;
-	else if ((p = strstr(s, pattern.buf)))
+	else if ((p = strstr(s, pattern.buf)) &&
+		 starts_with_newline(p + pattern.len))
 		len = p - s + 1;
 	strbuf_release(&pattern);
 	return len;