Merge pull request #6 from WyriHaximus/support-multiple-images

Support multiple images

.github/workflows/ci.yml

@@ -25,6 +25,10 @@ jobs:
             with:
               dockerfile: tests/Dockerfile
               image: ghcr.io/home-assistant/home-assistant:2024.12.2
+          - name: Multiple images
+            expected: '["linux/arm64","linux/amd64"]'
+            with:
+              image: ghcr.io/home-assistant/home-assistant:2024.12.2,ghcr.io/wyrihaximusnet/php:8.3-zts-alpine-dev
     steps:
       - uses: actions/checkout@v4
       - name: OCI Image Supported Platforms

README.md

@@ -15,6 +15,17 @@ The Dockerfile to get its supported platforms
 * *Default*: `Dockerfile`
 * *Example*: `Dockerfile-alpine-zts`
 
+### image
+
+Passing anything into the `image` input will disable checking for the passed `dockerfile` input value, and will get the 
+platforms for the image(s) you give it. When you pass it two or more, for example `ghcr.io/home-assistant/home-assistant:2024.12.2,ghcr.io/wyrihaximusnet/php:8.3-zts-alpine-dev`, 
+it will get the platforms for all of them but only return the platforms that are supported by all of them.
+
+* *Required*: `No`
+* *Type*: `string`
+* *Default*: ``
+* *Example*: `ghcr.io/wyrihaximusnet/php:8.3-zts-alpine-slim`
+
 ## Output
 
 This action only outputs a list of platforms as JSON through `platform`.
@@ -37,7 +48,7 @@ jobs:
       # Note: No checkout needed, the action will handle that for you in the most optimized way possible
       - id: supported-arch-matrix
         name: Generate Arch
-        uses: wyrihaximus/github-action-oci-image-supported-archs@v1
+        uses: wyrihaximus/github-action-oci-image-supported-platforms@v1
   build-docker-image:
     name: Build ${{ matrix.platform }} image
     strategy:

action.yaml

@@ -9,7 +9,7 @@ inputs:
     required: false
     default: 'Dockerfile'
   image:
-    description: The OCI image to get its supported platforms
+    description: The OCI image to get its supported platforms, optionally a comma seperated list of images can be supplied and the intersection of the supported platforms will be the output
     required: false
     default: ''
 outputs:
@@ -33,7 +33,7 @@ runs:
       shell: bash
       run: |
         printf "from=%s" $(cat ${{ inputs.dockerfile }} | grep FROM | tail -n 1 | docker run -q -i --rm ghcr.io/wyrihaximusnet/php:8.3-nts-alpine-slim php -r 'echo explode(" ", trim(fgets(STDIN)))[1];') >> $GITHUB_OUTPUT
-    - name: Image Wizzard
+    - name: Image 🧙
       id: image
       shell: bash
       run: |
@@ -46,7 +46,15 @@ runs:
       id: platform
       shell: bash
       run: |
-        printf "platform=%s" $(docker manifest inspect ${{ steps.image.outputs.image }} | docker run --rm -i -q ghcr.io/jqlang/jq:1.7.1 '([.manifests[].platform | select(.os != "unknown")]?) | .[] | (.os + "/" + .architecture)' | docker run --rm -i -q ghcr.io/jqlang/jq:1.7.1 -s -c '.') >> $GITHUB_OUTPUT
-
-github:
-  head_ref:
+        getPlatformsForImage () {
+          docker manifest inspect $1 | docker run --rm -i -q ghcr.io/jqlang/jq:1.7.1 '([.manifests[].platform | select(.os != "unknown")]?) | .[] | (.os + "/" + .architecture)' | docker run --rm -i -q ghcr.io/jqlang/jq:1.7.1 -s -c '.'
+        }
+        getPlatformsIntersected () {
+          echo $1 | docker run -q -i --rm ghcr.io/wyrihaximusnet/php:8.3-nts-alpine-slim php -r 'echo json_encode(array_intersect(...array_values(json_decode(trim(fgets(STDIN)), true))), JSON_UNESCAPED_SLASHES);'
+        }
+        export -f getPlatformsForImage
+        if [[ "${{ steps.image.outputs.image }}" == *","* ]]; then
+          printf "platform=%s" $(getPlatformsIntersected $(echo "${{ steps.image.outputs.image }}" | tr ',' '\n'| xargs -I % bash -c 'getPlatformsForImage "%"' | docker run --rm -i -q ghcr.io/jqlang/jq:1.7.1 -s -c '.')) >> $GITHUB_OUTPUT
+        else
+          printf "platform=%s" $(getPlatformsForImage ${{ steps.image.outputs.image }}) >> $GITHUB_OUTPUT
+        fi