Split stub build

Author: danog

.github/workflows/build-docker.yml

@@ -95,7 +95,6 @@ jobs:
           PLATFORM: ${{ matrix.image }}
         run: |
           echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.repository_owner }} --password-stdin
-          bin/stubs/build_docker.sh
           php bin/ci/build-docker.php
 
   merge-docker:

.github/workflows/build-stubs.yml

@@ -0,0 +1,52 @@
+name: Build docker image for stubs
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  push:
+    branches:
+      - master
+      - 6.x
+
+permissions:
+  contents: read
+
+jobs:
+  pre_job:
+    permissions:
+      actions: write
+    runs-on: ubuntu-latest
+    outputs:
+      should_skip: ${{ steps.skip_check.outputs.should_skip }}
+    steps:
+      - id: skip_check
+        uses: fkirc/skip-duplicate-actions@v5.3.1
+        with:
+          cancel_others: true
+          do_not_skip: '["release"]'
+          paths: '[".github/**", "bin/**"]'
+
+  build-stubs-docker:
+    permissions:
+      packages: write
+    needs: pre_job
+    if: ${{ needs.pre_job.outputs.should_skip != 'true' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Upload docker image
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          REF: ${{ github.ref }}
+          ACTOR: ${{ github.repository_owner }}
+        run: |
+          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.repository_owner }} --password-stdin
+          bin/stubs/build_docker.sh
+

bin/stubs/build_docker.sh

@@ -1,12 +1,10 @@
 #!/bin/bash -e
 
-if [ "$PLATFORM" != "ubuntu-latest" ]; then exit 0; fi
-
 VERSIONS="7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4"
 
 for f in $VERSIONS; do
     {
-        docker build --build-arg VERSION=$f . -f bin/stubs/Dockerfile_$f -t ghcr.io/$ACTOR/psalm:internal_stubs_$f
+        docker buildx build --push --cache-to type=inline --cache-from type=registry,ref=ghcr.io/$ACTOR/psalm:internal_stubs_$f --build-arg VERSION=$f . -f bin/stubs/Dockerfile_$f -t ghcr.io/$ACTOR/psalm:internal_stubs_$f
     } &
     if [ "$f" == "7.1" ] || [ "$f" == "7.3" ] || [ "$f" == "8.0" ] || [ "$f" == "8.2" ] || [ "$f" == "8.4" ]; then wait; fi
 done