chore: Add workflow step to update metainfo.xml for releases

.github/workflows/build.yml

@@ -381,10 +381,71 @@ jobs:
             Fladder_x86_64.AppImage
             Fladder_x86_64.AppImage.zsync
 
+  prepare-metainfo:
+    runs-on: ubuntu-latest
+    needs: [fetch-info]
+    if: needs.fetch-info.outputs.build_type == 'release'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6.0.2
+        with:
+          fetch-depth: 0
+
+      - name: Update metainfo.xml releases
+        uses: actions/github-script@v8
+        with:
+          script: |
+            const fs = require('fs');
+            const version = '${{ needs.fetch-info.outputs.version_name }}';
+            const date = new Date().toISOString().split('T')[0];
+
+            // Same API call that generate_release_notes: true uses internally
+            const { data } = await github.rest.repos.generateReleaseNotes({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              tag_name: `v${version}`,
+              target_commitish: 'HEAD',
+            });
+
+            const escape = s => s
+              .replace(/&/g, '&')
+              .replace(/</g, '&lt;')
+              .replace(/>/g, '&gt;');
+
+            const items = data.body.split('\n')
+              .filter(l => l.trimStart().startsWith('* '))
+              .map(l => l.replace(/^\s*\*\s*/, '').trim())
+              .map(l => l.replace(/\[([^\]]+)\]\([^)]+\)/g, '$1')) // strip markdown links
+              .map(l => l.replace(/\*\*([^*]+)\*\*/g, '$1'))        // strip bold
+              .filter(Boolean)
+              .slice(0, 30)
+              .map(l => `        <li>${escape(l)}</li>`)
+              .join('\n');
+
+            const description = items
+              ? `      <description>\n        <ul>\n${items}\n        </ul>\n      </description>`
+              : `      <description>\n        <p>See GitHub for detailed changelog</p>\n      </description>`;
+
+            const newReleases =
+              `  <releases>\n    <release version="${version}" date="${date}">\n${description}\n    </release>\n  </releases>`;
+
+            let content = fs.readFileSync('flatpak/nl.jknaapen.fladder.metainfo.xml', 'utf8');
+            content = content.replace(/  <releases>[\s\S]*?<\/releases>/, newReleases);
+            fs.writeFileSync('flatpak/nl.jknaapen.fladder.metainfo.xml', content);
+
+            core.info(`Updated metainfo.xml: version=${version}, date=${date}`);
+
+      - name: Upload updated metainfo
+        uses: actions/upload-artifact@v4
+        with:
+          name: fladder-metainfo
+          path: flatpak/nl.jknaapen.fladder.metainfo.xml
+
   build-linux-flatpak:
     runs-on: ubuntu-latest
-    if: needs.fetch-info.outputs.build_type == 'release' || needs.fetch-info.outputs.build_type == 'nightly'
-    needs: [fetch-info, build-linux]
+    # prepare-metainfo is skipped for nightly; !failure() && !cancelled() allows this job to still run
+    if: ${{ !failure() && !cancelled() && (needs.fetch-info.outputs.build_type == 'release' || needs.fetch-info.outputs.build_type == 'nightly') }}
+    needs: [fetch-info, build-linux, prepare-metainfo]
     container:
       image: bilelmoussaoui/flatpak-github-actions:gnome-46
       options: --privileged
@@ -394,6 +455,13 @@ jobs:
         with:
           submodules: true
 
+      - name: Download updated metainfo
+        if: needs.fetch-info.outputs.build_type == 'release'
+        uses: actions/download-artifact@v4
+        with:
+          name: fladder-metainfo
+          path: flatpak
+
       - name: Download Artifacts Linux
         uses: actions/download-artifact@v4
         with:
@@ -456,6 +524,7 @@ jobs:
     name: Create Release
     needs:
       - fetch-info
+      - prepare-metainfo
       - build-android
       - build-windows
       - build-ios
@@ -474,6 +543,13 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Checkout repository (release)
+        if: needs.fetch-info.outputs.build_type == 'release'
+        uses: actions/checkout@v4.1.1
+        with:
+          ref: develop
+          token: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Set version variables
         id: version
         run: |
@@ -483,6 +559,27 @@ jobs:
             echo "version=${{ needs.fetch-info.outputs.version_name }}" >> $GITHUB_OUTPUT
           fi
 
+      - name: Download updated metainfo for commit
+        if: needs.fetch-info.outputs.build_type == 'release'
+        uses: actions/download-artifact@v4
+        with:
+          name: fladder-metainfo
+          path: fladder-metainfo
+
+      - name: Commit updated metainfo.xml to develop
+        if: needs.fetch-info.outputs.build_type == 'release'
+        run: |
+          cp fladder-metainfo/nl.jknaapen.fladder.metainfo.xml flatpak/nl.jknaapen.fladder.metainfo.xml
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add flatpak/nl.jknaapen.fladder.metainfo.xml
+          if git diff --staged --quiet; then
+            echo "No changes to metainfo.xml, skipping commit"
+          else
+            git commit -m "chore: update metainfo.xml to v${{ needs.fetch-info.outputs.version_name }}"
+            git push origin develop
+          fi
+
       - name: Delete existing nightly release
         if: needs.fetch-info.outputs.build_type == 'nightly'
         run: |