Add System Reference to CI (#3466)

* Initial workflow for system reference ext build

* add default branch to checkout

* fix directory

* try to fix path

* fix

* undo prev change

* debugging

* remove system ref path

* add rpi toolchain dir to path

* fix step

* rename var

* update path

* update path

* update toolchain version

* add ply

* add pkg config path to env

* update dirs

* fix pkgconfig path

* fix typo

* remove -j arg

* try with my branch

* cleanup

* one more test

* undo prev change

* Update spelling

* Update default branch

.github/actions/spelling/expect.txt

@@ -463,6 +463,7 @@ INVALIDHEADERHASH
 invisi
 ioc
 ioctl
+ipas
 IPCFG
 IPHELPER
 ipriority

.github/workflows/ext-raspberry-system-reference.yml

@@ -0,0 +1,75 @@
+# Cross-compile https://github.com/fprime-community/fprime-system-reference
+
+name: "External Repo: System Reference"
+
+on:
+  push:
+    branches: [ devel, release/** ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ devel, release/** ]
+    paths-ignore:
+      - 'docs/**'
+      - '**.md'
+      - '.github/actions/spelling/**'
+      - '.github/ISSUE_TEMPLATE/**'
+
+env:
+  RPI_TOOLCHAIN_DIR: /tmp/rpi-toolchain
+  PKG_CONFIG_PATH: ${{ github.workspace }}/libcamera/build/lib/pkgconfig/
+
+jobs:
+  get-branch:
+    name: "Get target branch"
+    uses: ./.github/workflows/reusable-get-pr-branch.yml
+    with:
+      target_repository: fprime-community/fprime-system-reference
+      default_target_ref: main
+  
+  cross-compilation:
+    name: "Cross Compilation"
+    runs-on: ubuntu-22.04
+    needs: get-branch
+    steps:
+      - name: "Checkout target repository"
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+          repository: fprime-community/fprime-system-reference
+          ref: ${{ needs.get-branch.outputs.target-branch }}
+      - name: "Overlay current F´ revision"
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+          path: ./fprime
+          fetch-depth: 0
+      - uses: ./fprime/.github/actions/setup
+        with:
+          location: ./fprime
+      - name: "Install meson and ninja"
+        run: |
+          pip3 install meson ninja ply
+        shell: bash
+      - name: "Setup RPI Toolchain"
+        uses: fprime-community/setup-rpi-sysroot@main
+        with:
+          # libcamera requires 8+
+          toolchain: "https://developer.arm.com/-/media/Files/downloads/gnu-a/8.3-2019.03/binrel/gcc-arm-8.3-2019.03-x86_64-arm-linux-gnueabihf.tar.xz"
+      - name: "Add RPI Toolchain to PATH"
+        run: |
+          echo "PATH=$RPI_TOOLCHAIN_DIR/bin:$PATH" >> $GITHUB_ENV
+      - name: Build libcamera
+        run: |
+          cd libcamera
+          meson setup build -Dprefix=${{ github.workspace }}/libcamera/build/ -Dpipelines=rpi/vc4 -Dipas=rpi/vc4 --cross-file ../libcamera-aarch32.txt
+          cd build
+          ninja
+          ninja install
+      - name: "Generate System Reference build cache"
+        working-directory: SystemReference
+        run: |
+          fprime-util generate raspberrypi
+      - name: "Build System Reference"
+        working-directory: SystemReference
+        run: |
+          fprime-util build raspberrypi