Generate a PR to adopt latest C2PA core SDK when it is updated (#1)

Author: scouten-adobe

.github/workflows/update-c2pa-core-sdk.yml

@@ -0,0 +1,87 @@
+name: Update C2PA core SDK version
+
+on:
+  schedule:
+    # Check for new releases every 6 hours
+    - cron: '0 */6 * * *'
+  workflow_dispatch:
+
+jobs:
+  check-and-update:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+    
+    - name: Get latest c2pa-rs release
+      id: get_release
+      run: |
+        # Get the latest release tag from c2pa-rs that matches the pattern c2pa-c-ffi-v*
+        LATEST_TAG=$(curl -s "https://api.github.com/repos/contentauth/c2pa-rs/releases" | \
+          jq -r '.[].tag_name | select(test("^c2pa-c-ffi-v"))' | \
+          head -1)
+        
+        if [ -z "$LATEST_TAG" ]; then
+          echo "No matching tags found"
+          exit 1
+        fi
+        
+        # Extract version from the tag (remove c2pa-c-ffi- prefix)
+        VERSION=$(echo "$LATEST_TAG" | sed 's/^c2pa-c-ffi-//')
+        
+        echo "latest_tag=$LATEST_TAG" >> $GITHUB_OUTPUT
+        echo "version=$VERSION" >> $GITHUB_OUTPUT
+
+        echo "Latest matching tag: $LATEST_TAG"
+        echo "Extracted version: $VERSION"
+    
+    - name: Get current version from Makefile
+      id: current_version
+      run: |
+        CURRENT_VERSION=$(grep '^C2PA_VERSION := ' Makefile | cut -d' ' -f3)
+        echo "current_version=$CURRENT_VERSION" >> $GITHUB_OUTPUT
+        echo "Current version: $CURRENT_VERSION"
+    
+    - name: Check if update is needed
+      id: check_update
+      run: |
+        if [ "${{ steps.get_release.outputs.version }}" != "${{ steps.current_version.outputs.current_version }}" ]; then
+          echo "needs_update=true" >> $GITHUB_OUTPUT
+          echo "Update needed: ${{ steps.current_version.outputs.current_version }} -> ${{ steps.get_release.outputs.version }}"
+        else
+          echo "needs_update=false" >> $GITHUB_OUTPUT
+          echo "No update needed, versions match: ${{ steps.current_version.outputs.current_version }}"
+        fi
+    
+    - name: Update Makefile
+      if: steps.check_update.outputs.needs_update == 'true'
+      run: |
+        # Update the C2PA_VERSION variable in Makefile
+        sed -i "s/^C2PA_VERSION := .*/C2PA_VERSION := ${{ steps.get_release.outputs.version }}/" Makefile
+        
+        # Verify the change
+        echo "Updated Makefile:"
+        grep '^C2PA_VERSION := ' Makefile
+    
+    - name: Create pull request
+      if: steps.check_update.outputs.needs_update == 'true'
+      uses: peter-evans/create-pull-request@v5
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+        commit-message: "Update core C2PA SDK to ${{ steps.get_release.outputs.version }}"
+        title: "Update core C2PA SDK to ${{ steps.get_release.outputs.version }}"
+        body: |
+          This PR updates C2PA_VERSION in the Makefile to use the latest c2pa-rs release.
+          
+          - **Previous version**: ${{ steps.current_version.outputs.current_version }}
+          - **New version**: ${{ steps.get_release.outputs.version }}
+          - **Release tag**: ${{ steps.get_release.outputs.latest_tag }}
+          
+          This update was automatically generated by the update-c2pa-core-sdk workflow.
+          
+          Please review and merge if the changes look correct.
+        branch: update-c2pa-version-${{ steps.get_release.outputs.version }}
+        delete-branch: true