ci: refactor docker runner script

We will support alpine check in docker later in this series.

While we're at it, tell people to run as root in podman,
if podman is used as drop-in replacement for docker,
because podman will map host-user to container's root,
therefore, mapping their permission.

Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>

.travis.yml

@@ -32,7 +32,7 @@ matrix:
       services:
         - docker
       before_install:
-      script: ci/run-linux32-docker.sh
+      script: ci/run-docker.sh
     - env: jobname=StaticAnalysis
       os: linux
       compiler:

azure-pipelines.yml

@@ -489,14 +489,14 @@ jobs:
        test "$GITFILESHAREPWD" = '$(gitfileshare.pwd)' || ci/mount-fileshare.sh //gitfileshare.file.core.windows.net/test-cache gitfileshare "$GITFILESHAREPWD" "$HOME/test-cache" || exit 1
 
        res=0
-       sudo AGENT_OS="$AGENT_OS" BUILD_BUILDNUMBER="$BUILD_BUILDNUMBER" BUILD_REPOSITORY_URI="$BUILD_REPOSITORY_URI" BUILD_SOURCEBRANCH="$BUILD_SOURCEBRANCH" BUILD_SOURCEVERSION="$BUILD_SOURCEVERSION" SYSTEM_PHASENAME="$SYSTEM_PHASENAME" SYSTEM_TASKDEFINITIONSURI="$SYSTEM_TASKDEFINITIONSURI" SYSTEM_TEAMPROJECT="$SYSTEM_TEAMPROJECT" CC=$CC MAKEFLAGS="$MAKEFLAGS" bash -lxc ci/run-linux32-docker.sh || res=1
+       sudo AGENT_OS="$AGENT_OS" BUILD_BUILDNUMBER="$BUILD_BUILDNUMBER" BUILD_REPOSITORY_URI="$BUILD_REPOSITORY_URI" BUILD_SOURCEBRANCH="$BUILD_SOURCEBRANCH" BUILD_SOURCEVERSION="$BUILD_SOURCEVERSION" SYSTEM_PHASENAME="$SYSTEM_PHASENAME" SYSTEM_TASKDEFINITIONSURI="$SYSTEM_TASKDEFINITIONSURI" SYSTEM_TEAMPROJECT="$SYSTEM_TEAMPROJECT" CC=$CC MAKEFLAGS="$MAKEFLAGS" jobname=Linux32 bash -lxc ci/run-docker.sh || res=1
 
        sudo chmod a+r t/out/TEST-*.xml
        test ! -d t/failed-test-artifacts || sudo chmod a+r t/failed-test-artifacts
 
        test "$GITFILESHAREPWD" = '$(gitfileshare.pwd)' || sudo umount "$HOME/test-cache" || res=1
        exit $res
-    displayName: 'ci/run-linux32-docker.sh'
+    displayName: 'jobname=Linux32 ci/run-docker.sh'
     env:
       GITFILESHAREPWD: $(gitfileshare.pwd)
   - task: PublishTestResults@2

ci/run-docker-build.sh

@@ -1,16 +1,16 @@
 #!/bin/sh
 #
-# Build and test Git in a 32-bit environment
+# Build and test Git inside container
 #
 # Usage:
-#   run-linux32-build.sh <host-user-id>
+#   run-docker-build.sh <host-user-id>
 #
 
 set -ex
 
 if test $# -ne 1 || test -z "$1"
 then
-	echo >&2 "usage: run-linux32-build.sh <host-user-id>"
+	echo >&2 "usage: run-docker-build.sh <host-user-id>"
 	exit 1
 fi
 

ci/run-docker.sh

@@ -1,16 +1,26 @@
 #!/bin/sh
 #
-# Download and run Docker image to build and test 32-bit Git
+# Download and run Docker image to build and test Git
 #
 
 . ${0%/*}/lib.sh
 
-docker pull daald/ubuntu32:xenial
+case "$jobname" in
+Linux32)
+	CI_CONTAINER="daald/ubuntu32:xenial"
+	;;
+*)
+	exit 1
+	;;
+esac
+
+docker pull "$CI_CONTAINER"
 
 # Use the following command to debug the docker build locally:
-# $ docker run -itv "${PWD}:/usr/src/git" --entrypoint /bin/bash daald/ubuntu32:xenial
+# <host-user-id> must be 0 if podman is used as drop-in replacement for docker
+# $ docker run -itv "${PWD}:/usr/src/git" --entrypoint /bin/sh "$CI_CONTAINER"
 # root@container:/# export jobname=<jobname>
-# root@container:/# /usr/src/git/ci/run-linux32-build.sh <host-user-id>
+# root@container:/# /usr/src/git/ci/run-docker-build.sh <host-user-id>
 
 container_cache_dir=/tmp/travis-cache
 
@@ -26,8 +36,8 @@ docker run \
 	--env cache_dir="$container_cache_dir" \
 	--volume "${PWD}:/usr/src/git" \
 	--volume "$cache_dir:$container_cache_dir" \
-	daald/ubuntu32:xenial \
-	/usr/src/git/ci/run-linux32-build.sh $(id -u $USER)
+	"$CI_CONTAINER" \
+	/usr/src/git/ci/run-docker-build.sh $(id -u $USER)
 
 check_unignored_build_artifacts