feat: Add library auto-update workflow

.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 "$LATEST_TAG" ]; then
+            echo "No matching tags found"
+            exit 1
+          fi
+
+          # Extract version from the tag (remove c2pa-c-ffi- prefix, keep v prefix as used in gradle.properties)
+          VERSION=$(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: $VERSION"
+
+      - name: Get current version from gradle.properties
+        id: current_version
+        run: |
+          CURRENT_VERSION=$(grep '^c2paVersion=' library/gradle.properties | cut -d'=' -f2 | xargs)
+          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: ${{ steps.current_version.outputs.current_version }}"
+          fi
+
+      - name: Update gradle.properties
+        if: steps.check_update.outputs.needs_update == 'true'
+        run: |
+          # Update the c2paVersion in library/gradle.properties
+          sed -i "s/^c2paVersion=.*/c2paVersion=${{ steps.get_release.outputs.version }}/" library/gradle.properties
+
+          # Verify the changes
+          echo "Updated library/gradle.properties:"
+          grep '^c2paVersion=' library/gradle.properties
+
+      - 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 c2paVersion in library/gradle.properties 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