Fix handling metadata with single quotes (#90)

Author: k0ff33

action.yml

@@ -1,9 +1,9 @@
-name: 'Docker build and push'
-description: 'Simple Docker build and push action'
+name: "Docker build and push"
+description: "Simple Docker build and push action"
 author: [email protected]
 branding:
-  icon: 'box'
-  color: 'white'
+  icon: "box"
+  color: "white"
 inputs:
   allow:
     description: "List of extra privileged entitlement (e.g., network.host,security.insecure)"
@@ -15,60 +15,60 @@ inputs:
     description: "List of additional build contexts (e.g., name=path)"
     required: false
   buildkitd-flags:
-    description: 'BuildKit daemon flags'
-    default: '--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host'
+    description: "BuildKit daemon flags"
+    default: "--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host"
     required: false
   driver-opts:
-    description: 'List of additional driver-specific options. (eg. image=moby/buildkit:master)'
+    description: "List of additional driver-specific options. (eg. image=moby/buildkit:master)"
     required: false
     default: image=public.ecr.aws/vend/moby/buildkit:buildx-stable-1
   binfmt-image:
-    description: 'Binfmt image'
+    description: "Binfmt image"
     required: false
     default: public.ecr.aws/eks-distro-build-tooling/binfmt-misc:qemu-v7.0.0
   workdir:
-    description: 'Working directory'
+    description: "Working directory"
     required: false
-    default: './'
+    default: "./"
   file:
-    description: 'Dockerfile name'
+    description: "Dockerfile name"
     required: false
-    default: 'Dockerfile'
+    default: "Dockerfile"
   build-args:
     description: "List of build-time variables"
     required: false
   organization:
-    description: 'Organization'
+    description: "Organization"
     required: true
   repository:
-    description: 'Repository'
+    description: "Repository"
     required: true
   registry:
-    description: 'Docker registry'
+    description: "Docker registry"
     required: true
   target:
     description: "Sets the target stage to build"
     required: false
-    default: ''
+    default: ""
   platforms:
     description: "List of target platforms for build (e.g. linux/amd64,linux/arm64,linux/riscv64,linux/ppc64le,linux/s390x,etc)"
     required: false
-    default: 'linux/amd64'
+    default: "linux/amd64"
   provenance:
     description: "Generate provenance attestation for the build"
     required: false
   image_name:
     description: "Image name (excluding registry). Defaults to {{$organization/$repository}}."
     required: false
-    default: ''
+    default: ""
   login:
-    description: 'Docker login'
+    description: "Docker login"
     required: false
-    default: ''
+    default: ""
   password:
-    description: 'Docker password'
+    description: "Docker password"
     required: false
-    default: ''
+    default: ""
   cache-from:
     description: "List of external cache sources for buildx (e.g., user/app:cache, type=local,src=path/to/dir)"
     required: false
@@ -159,11 +159,11 @@ runs:
         labels: |
           org.opencontainers.image.source=https://github.com/${{ inputs.organization }}/${{ inputs.repository }}
 
-    - name: 'Install jq 1.6'
+    - name: "Install jq 1.6"
       uses: dcarbone/[email protected]
       with:
         version: 1.6
-        force: 'true'
+        force: "true"
 
     # here we set the first tag in the output as the output of this step
     # this order is determined by the priority, we set the sha as 1001, as that is 1 above the defaults
@@ -195,7 +195,7 @@ runs:
       uses: docker/setup-buildx-action@v3
       with:
         endpoint: buildx-context
-        buildkitd-flags: "${{ inputs.debug == 'true' && '--debug' || '' }} ${{ inputs.buildkitd-flags }}" 
+        buildkitd-flags: "${{ inputs.debug == 'true' && '--debug' || '' }} ${{ inputs.buildkitd-flags }}"
         driver-opts: "${{ inputs.driver-opts }}"
 
     - name: Login
@@ -206,7 +206,6 @@ runs:
         username: ${{ inputs.login }}
         password: ${{ inputs.password }}
 
-
     - name: Build and push Docker images
       # Do not update to >=v6 untill the issue would be solved
       # https://github.com/docker/build-push-action/issues/1167
@@ -236,17 +235,22 @@ runs:
     - name: Get Metadata
       id: get-metadata
       shell: bash
+      env:
+        METADATA: ${{ toJSON(steps.docker-build-push-action.outputs.metadata) }}
       run: |
-        metadata=$(echo '${{ steps.docker-build-push-action.outputs.metadata }}' | jq -c)
-        echo "metadata=$metadata" >> $GITHUB_OUTPUT
+        {
+          echo "metadata<<EOF"
+          echo "$METADATA"
+          echo "EOF"
+        } >> $GITHUB_OUTPUT
         echo "## Docker Image Metadata" >> $GITHUB_STEP_SUMMARY
         echo '```json' >> $GITHUB_STEP_SUMMARY
-        echo "$metadata" | jq >> $GITHUB_STEP_SUMMARY
+        echo "$METADATA" | jq >> $GITHUB_STEP_SUMMARY
         echo '```' >> $GITHUB_STEP_SUMMARY
 
     - name: Docker Inspect
       id: inspect
-      if:  ${{ inputs.inspect }} == 'true'
+      if: ${{ inputs.inspect }} == 'true'
       shell: bash
       run: |
         docker pull "${{ inputs.registry }}/${{ steps.image_name.outputs.image_name }}:${{ steps.tag.outputs.output }}"