.github/workflows: build arm64 packages for latest Debian

Users have recently requested packages for arm64, which is an
increasingly popular architecture.  In addition, it is the architecture
used on newer Macs and some Windows systems, which may commonly run
Linux VMs or WSL.

However, GitHub Actions does not support arm64 natively, so we must
build in emulation.  This is extraordinarily slow, so we'll build only
for the latest Debian release.  All Debian-based images use our Debian
images, and Debian is by far the most portable mainstream Linux
distribution in terms of architecture support, so the cost to add
additional architectures should be extremely minimal.  Users who would
like versions for older releases may build their own packages with our
tooling.

Build these packages in both CI and for releases.

Author: bk2204

.github/workflows/ci.yml

@@ -114,3 +114,27 @@ jobs:
     - run: git clone https://github.com/git-lfs/build-dockers.git "$HOME/build-dockers"
     - run: (cd "$HOME/build-dockers" && ./build_dockers.bsh)
     - run: DOCKER_AUTOPULL=0 ./docker/run_dockers.bsh --prune
+  build-docker-cross:
+    name: Build Cross Linux packages
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        arch: [arm64]
+        container: [debian_11]
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-ruby@v1
+    - run: |
+        echo '{"experimental": true}' | sudo tee /etc/docker/daemon.json
+        sudo systemctl restart docker.service
+        docker version -f '{{.Server.Experimental}}'
+    - uses: docker/setup-qemu-action@v1
+    - run: git clone https://github.com/git-lfs/build-dockers.git "$HOME/build-dockers"
+    - run: (cd "$HOME/build-dockers" && ./build_dockers.bsh --arch=$ARCH $CONTAINER)
+      env:
+        ARCH: ${{matrix.arch}}
+        CONTAINER: ${{matrix.container}}
+    - run: DOCKER_AUTOPULL=0 ./docker/run_dockers.bsh --prune --arch=$ARCH $CONTAINER
+      env:
+        ARCH: ${{matrix.arch}}
+        CONTAINER: ${{matrix.container}}

.github/workflows/release.yml

@@ -122,3 +122,30 @@ jobs:
     - run: '[ -z "${GITHUB_REF%%refs/tags/*-pre*}" ] || ./script/packagecloud.rb'
       env:
         PACKAGECLOUD_TOKEN: ${{secrets.PACKAGECLOUD_TOKEN}}
+  build-docker-cross:
+    name: Build Cross Linux packages
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        arch: [arm64]
+        container: [debian_11]
+    - uses: actions/checkout@v1
+    - uses: actions/setup-ruby@v1
+    - run: |
+        echo '{"experimental": true}' | sudo tee /etc/docker/daemon.json
+        sudo systemctl restart docker.service
+        docker version -f '{{.Server.Experimental}}'
+    - uses: docker/setup-qemu-action@v1
+    - run: git clone https://github.com/git-lfs/build-dockers.git "$HOME/build-dockers"
+    - run: (cd "$HOME/build-dockers" && ./build_dockers.bsh --arch=$ARCH $CONTAINER)
+      env:
+        ARCH: ${{matrix.arch}}
+        CONTAINER: ${{matrix.container}}
+    - run: DOCKER_AUTOPULL=0 ./docker/run_dockers.bsh --prune --arch=$ARCH $CONTAINER
+      env:
+        ARCH: ${{matrix.arch}}
+        CONTAINER: ${{matrix.container}}
+    # If this is a pre-release tag, don't upload anything to packagecloud.
+    - run: '[ -z "${GITHUB_REF%%refs/tags/*-pre*}" ] || ./script/packagecloud.rb'
+      env:
+        PACKAGECLOUD_TOKEN: ${{secrets.PACKAGECLOUD_TOKEN}}

README.md

@@ -33,6 +33,9 @@ built from source using the latest version of [Go](https://golang.org), and the
 available instructions in our
 [Wiki](https://github.com/git-lfs/git-lfs/wiki/Installation#source).
 
+Note that Debian and RPM packages are built for all OSes for amd64 and i386.
+For arm64, only Debian packages for the latest Debian release are built due to the cost of building in emulation.
+
 ### Installing
 
 #### From binary