ci: add a composite action for copy-to-production

Signed-off-by: Niccolò Fei <niccolo.fei@enterprisedb.com>

.github/actions/copy-images/README.md

@@ -0,0 +1,120 @@
+# Copy Images Action
+
+This composite GitHub Action copies a set of container images from a
+`testing registry` to a `production registry`, and signs them using `Cosign`.
+It requires as input Bake's build result metadata, which is the output provided
+by the [bake-action](https://github.com/docker/bake-action?tab=readme-ov-file#outputs).
+
+---
+
+## How it works
+
+The action assumes a consistent naming convention between your testing and production registries.
+
+* A production image is named like `ghcr.io/org/image`
+* The corresponding testing image must include a suffix, e.g. `ghcr.io/org/image-testing`
+
+You can customize this suffix with the `inputs.test_registry_suffix` input.
+
+The action proceeds as follows:
+
+1. It retrieves all image references from `inputs.bake_build_metadata`
+2. It generates a list of destination images by stripping out the `test_registry_suffix` from each image
+3. Each image is copied to the destination registry using `Skopeo copy`. The digest of the image is preserved.
+4. Each production image is signed using `Cosign`
+
+---
+
+## Requirements
+
+This composite action requires the calling workflow’s `GITHUB_TOKEN`
+to have the following permissions:
+
+```
+permissions:
+  contents: read
+  packages: write
+  id-token: write # needed by Cosign for signing the images with GitHub OIDC Token
+```
+
+---
+
+## Inputs
+
+| Name                   | Description                                        | Required  | Default        |
+| ---------------------- | -------------------------------------------------- | --------- | -------------- |
+| `bake_build_metadata`  | The JSON build result metadata generated by Bake   | ✅ Yes    | —              |
+| `registry_user`        | The user used to authenticate to the registry      | ✅ Yes    | —              |
+| `registry_token`       | The token used to authenticate to the registry     | ✅ Yes    | —              |
+| `test_registry_suffix` | The suffix of the testing images                   | ❌ No     | `-testing`     |
+
+Note:
+  The JSON build result metadata is provided by [bake-action](https://github.com/docker/bake-action) as an output, see
+  [bake-action outputs](https://github.com/docker/bake-action?tab=readme-ov-file#outputs).
+  Alternatively, if you are using `docker buildx bake` via commandline, you can write your build metadata to a file
+  by using `--metadata-file`, and then provide the content of that file as `input.bake_build_metadata`.
+
+---
+
+## Usage
+
+Example usage:
+
+```
+jobs:
+  copytoproduction:
+    runs-on: ubuntu-latest
+    needs:
+      - testbuild
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    steps:
+      - name: Copy to production
+        uses: cloudnative-pg/postgres-containers/.github/actions/copy-images@main
+        with:
+          bake_build_metadata: "${{ needs.testbuild.outputs.metadata }}"
+          registry_user: ${{ github.actor }}
+          registry_token: ${{ secrets.GITHUB_TOKEN }}
+```
+
+Example workflow:
+
+```
+jobs:
+  # Building and pushing to a testing registry
+  testbuild:
+    runs-on: ubuntu-latest
+    outputs:
+      metadata: ${{ steps.build.outputs.metadata }}
+    steps:
+      ...
+      - uses: docker/bake-action@v6
+        id: build
+        with:
+          push: true
+
+  # Here's when you'd want to have one or
+  # multiple jobs to scan and test your images
+  scan-images:
+    ...
+
+  # If the tests passed, we promote the images to the production repo
+  copytoproduction:
+    runs-on: ubuntu-latest
+    needs:
+      - testbuild
+      - scan-images
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    steps:
+      - name: Copy to production
+        uses: cloudnative-pg/postgres-containers/.github/actions/copy-images@main
+        with:
+          bake_build_metadata: "${{ needs.testbuild.outputs.metadata }}"
+          registry_user: ${{ github.actor }}
+          registry_token: ${{ secrets.GITHUB_TOKEN }}
+```

.github/actions/copy-images/action.yml

@@ -0,0 +1,75 @@
+name: Copy and sign images
+description: Copy and sign images to the production repository
+inputs:
+  bake_build_metadata:
+    description: "The JSON build metadata of Bake"
+    required: true
+  registry_user:
+    description: "The user used to authenticate to the registry"
+    required: true
+  registry_token:
+    description: "The token used to authenticate to the registry"
+    required: true
+  test_registry_suffix:
+    description: "The testing registry suffix"
+    required: false
+    default: '-testing'
+
+runs:
+  using: composite
+  steps:
+    - name: Log in to the GitHub Container registry
+      uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3
+      with:
+        registry: ghcr.io
+        username: ${{ inputs.registry_user }}
+        password: ${{ inputs.registry_token }}
+
+    - name: Copy images
+      shell: bash
+      env:
+        # renovate: datasource=docker depName=quay.io/skopeo/stable versioning=loose
+        SKOPEO_VERSION: "v1.20.0-immutable"
+        SUFFIX: ${{ inputs.test_registry_suffix }}
+      run: |
+        images=$(echo '${{ inputs.bake_build_metadata }}' |
+          jq -r '
+            .[] as $items |
+            (
+              $items."image.name" |
+              split(",")[] +
+                "@" +
+                $items."containerimage.digest"
+            )
+          '
+        )
+        for image in $images
+        do
+          testimageshaonly="${image%:*@*}@${image#*@}"
+          testimagenosha="${image%@*}"
+          prodimage="${testimagenosha/$SUFFIX/}"
+          echo "Copying ${testimageshaonly} to ${prodimage}"
+          docker run --quiet quay.io/skopeo/stable:$SKOPEO_VERSION copy -q -a \
+            --dest-creds ${{ inputs.registry_user }}:${{ inputs.registry_token }} \
+            docker://${testimageshaonly} docker://${prodimage}
+        done
+
+    - name: Install cosign
+      uses: sigstore/cosign-installer@398d4b0eeef1380460a10c8013a76f728fb906ac # v3
+
+    - name: Sign images
+      shell: bash
+      env:
+        SUFFIX: ${{ inputs.test_registry_suffix }}
+      run: |
+        images=$(echo '${{ inputs.bake_build_metadata }}' |
+          jq -r --arg suffix "$SUFFIX" '.[] |
+            (
+              ."image.name" |
+              sub(",.*";"") |
+              sub($suffix + ":[^@]+";"")
+            ) + "@" + ."containerimage.digest"
+          '
+        )
+        echo "Signing ${images}"
+        cosign sign -t 5m --yes ${images}

.github/workflows/bake_targets.yml

@@ -184,9 +184,6 @@ jobs:
         with:
           sarif_file: snyk.sarif
 
-  # Use the metadata generated in the `testbuild` step to find all the images
-  # that have been built. We copy them one by one to the production registry
-  # using skopeo. Then we sign the production images too.
   copytoproduction:
     name: Copy images to production
     if: |
@@ -199,54 +196,15 @@ jobs:
     permissions:
       contents: read
       packages: write
-      security-events: write
       # Required by the cosign step
       id-token: write
     steps:
-      - name: Log in to the GitHub Container registry
+      - name: Checkout Code
-        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+
+      - name: Copy to production
+        uses: ./.github/actions/copy-images
         with:
-          registry: ghcr.io
+          bake_build_metadata: "${{ needs.testbuild.outputs.metadata }}"
-          username: ${{ github.actor }}
+          registry_user: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          registry_token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Copy images
-        run: |
-          images=$(echo '${{ needs.testbuild.outputs.metadata }}' |
-            jq -r '
-              .[] as $items |
-              (
-                $items."image.name" |
-                split(",")[] +
-                  "@" +
-                  $items."containerimage.digest"
-              )
-            '
-          )
-          for image in $images
-          do
-            testimageshaonly="${image%:*@*}@${image#*@}"
-            testimagenosha="${image%@*}"
-            prodimage="${testimagenosha/-testing/}"
-            echo "Copying ${testimageshaonly} to ${prodimage}"
-            docker run --quiet quay.io/skopeo/stable:v1.17.0-immutable copy -q -a \
-              --dest-creds ${{ github.actor }}:${{ secrets.GITHUB_TOKEN }} \
-              docker://${testimageshaonly} docker://${prodimage}
-          done
-
-      - name: Install cosign
-        uses: sigstore/cosign-installer@398d4b0eeef1380460a10c8013a76f728fb906ac # v3
-
-      - name: Sign images
-        run: |
-          images=$(echo '${{ needs.testbuild.outputs.metadata }}' |
-            jq -r '.[] |
-              (
-                ."image.name" |
-                sub(",.*";"") |
-                sub("-testing:[^@]+";"")
-              ) + "@" + ."containerimage.digest"
-            '
-          )
-          echo "Signing ${images}"
-          cosign sign -t 5m --yes ${images}

renovate.json

@@ -19,6 +19,15 @@
         "\\/\\/\\s*renovate:\\s*datasource=(?<datasource>.*?)\\s+(versioning=(?<versioning>.*?))?\\s+depName=(?<depName>.*?)\\s*\\n\\s*[A-Za-z0-9_-]+\\s*=\\s*\"(?<currentValue>[^\"]+)\""
       ],
       "versioningTemplate": "{{#if versioning}}{{{versioning}}}{{else}}semver{{/if}}"
+    },
+    {
+      "customType": "regex",
+      "managerFilePatterns": [
+        "/\\.ya?ml$/"
+      ],
+      "matchStrings": [
+        "# renovate: datasource=(?<datasource>[a-z-.]+?) depName=(?<depName>[^\\s]+?)(?: (?:lookupName|packageName)=(?<packageName>[^\\s]+?))?(?: versioning=(?<versioning>[^\\s]+?))?(?: extractVersion=(?<extractVersion>[^\\s]+?))?\\s+[A-Za-z0-9_]+?_VERSION\\s*:\\s*[\"']?(?<currentValue>.+?)[\"']?\\s"
+      ]
     }
   ],
   "packageRules": [