Comment on issues when fix is released

Fixes #649

.github/workflows/gradle.yml

@@ -11,6 +11,8 @@ on:
 jobs:
   build:
     runs-on: ubuntu-22.04
+    permissions:
+      issues: write
     concurrency:
       group: release-${{ github.ref }}
       cancel-in-progress: true
@@ -52,6 +54,57 @@ jobs:
         env:
           CURSEFORGE_TOKEN: ${{ secrets.CURSEFORGE_TOKEN }}
           MODRINTH_TOKEN: ${{ secrets.MODRINTH_TOKEN }}
+      - name: Capture mod version
+        if: steps.check_branch.outputs.is_release == 'true'
+        run: echo "MOD_VERSION=$(./gradlew properties -q | grep '^version:' | awk '{print $2}')" >> $GITHUB_ENV
+      - name: Comment on fixed issues
+        if: steps.check_branch.outputs.is_release == 'true'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const { execSync } = require('child_process');
+
+            const branch = context.ref.replace('refs/heads/', '');
+            const { data: runs } = await github.rest.actions.listWorkflowRuns({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              workflow_id: 'gradle.yml',
+              branch,
+              status: 'success',
+              per_page: 1
+            });
+
+            const logArgs = runs.workflow_runs.length > 0
+              ? `${runs.workflow_runs[0].head_sha}..${context.sha}`
+              : `-1 ${context.sha}`;
+            const log = execSync(`git log ${logArgs} --format=%s%n%b`, { encoding: 'utf8' });
+
+            const issueNumbers = new Set();
+            const pattern = /(?:fix(?:es|ed)?|close[sd]?|resolve[sd]?)\s+#(\d+)/gi;
+            let match;
+            while ((match = pattern.exec(log)) !== null) {
+              issueNumbers.add(parseInt(match[1]));
+            }
+
+            if (issueNumbers.size === 0) {
+              console.log('No fixed issues found in commits');
+              return;
+            }
+
+            const version = process.env.MOD_VERSION;
+            for (const issueNumber of issueNumbers) {
+              try {
+                await github.rest.issues.createComment({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: issueNumber,
+                  body: `The fix for this issue has been released in ModernFix ${version}`
+                });
+                console.log(`Commented on issue #${issueNumber}`);
+              } catch (e) {
+                console.log(`Could not comment on #${issueNumber}: ${e.message}`);
+              }
+            }
       - name: Upload Artifacts to GitHub
         uses: actions/upload-artifact@v4
         with: