Container always rebuilt

[Krakinou]

Since 2 weeks (around 2nd August as far as I can tell), my github actions using run-on-arch-action systematically rebuild the container when triggered.

• I have the instruction githubToken: ${{ github.token }} in my step
• I have granted read and write permission in the workflow permission in the action settings for this repo.
• The action was running daily for a few month without rebuilding the package

I created a small action to test it and the install step is always run, and the sha256sum is different each time:

name: Check container build
on:
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-22.04


    strategy:
      fail-fast: false
      matrix:
        include:
          - qemu_arch: armv7
            qemu_distro: ubuntu22.04
          - qemu_arch: aarch64
            qemu_distro: ubuntu22.04

    steps:

    - name : Step 1
      uses: uraimo/run-on-arch-action@v.2.5.1
      with:
        arch: ${{ matrix.qemu_arch }}
        distro: ${{ matrix.qemu_distro }}
        githubToken: ${{ github.token }}
        install: |
            case "${{ matrix.qemu_arch }}" in 
              aarch64)
                echo " aarch64";
                echo "This is the install step";
                ;;
              armv7)
                echo " armv7";
                echo "This is the install step";
                ;;
              esac

        run: |
          echo "system installed : This is the run step"

I noticed in the log that a bunch of new messages appeared at the same time as this issue:

  #0 building with "default" instance using docker driver
  
  #1 [internal] load .dockerignore
  #1 transferring context: 2B done
  #1 DONE 0.0s
  
  #2 [internal] load build definition from Dockerfile.aarch64.ubuntu22.04
  #2 transferring dockerfile: 219B done
  #2 DONE 0.0s
  
  #3 [auth] arm64v8/ubuntu:pull token for registry-1.docker.io
  #3 DONE 0.0s
  
  #4 [internal] load metadata for docker.io/arm64v8/ubuntu:22.04
  #4 DONE 0.3s
  
  #5 importing cache manifest from ghcr.io/krakinou/runonarch/run-on-arch-krakinou-runonarch-check-container-build-aarch64-ubuntu22-04
  #5 DONE 0.0s
  
  #6 [internal] load build context
  #6 transferring context: 284B done
  #6 DONE 0.0s

Also a new version of the package with a different sha256sum is created each time.
Am I missing something or did something change?

[Veetaha]

I also see the same problem (ci link)

[gamer191]

diff --git a/src/run-on-arch.sh b/src/run-on-arch.sh
index 813e094..1a22d9b 100755
--- a/src/run-on-arch.sh
+++ b/src/run-on-arch.sh
@@ -72,7 +72,8 @@ build_container () {
       "${ACTION_DIR}/Dockerfiles" \
       --file "$DOCKERFILE" \
       --tag "${CONTAINER_NAME}:latest" \
-      --cache-from="$PACKAGE_REGISTRY"
+      --cache-from="$PACKAGE_REGISTRY" \
+      --build-arg BUILDKIT_INLINE_CACHE=1
     docker tag "${CONTAINER_NAME}:latest" "$PACKAGE_REGISTRY" \
       && docker push "$PACKAGE_REGISTRY" || true
   fi

seems to fix it

source: kleisauke/libvips-packaging@e0b8d32

EDIT: I'm going to verify this, and then I'll open a PR