Automatically post a warning comment when translation files are changed

.github/workflows/detect-translation-file-changes.yml

@@ -0,0 +1,62 @@
+name: Detect translation file changes
+
+
+on:
+  pull_request:
+    branches:
+      - master
+    paths:
+      - lang/po/*.po
+      - lang/po/*.pot
+
+
+jobs:
+  po-change-warning:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Detect translation file changes"
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            const skip_phrase = 'Translation file changes are intended';
+            if (context.payload.pull_request.body.includes(skip_phrase)) {
+              console.log('PR body contains skip phrase.  Exiting.');
+              return;
+            }
+            core.setFailed('Translation file changes detected, but a skip phrase is not found in the PR body.')
+            console.log(
+              'Fetching comments of pull request %d of repository %s/%s.',
+              context.issue.number, context.repo.owner, context.repo.repo
+            );
+            const comments = await github.paginate(
+              github.rest.issues.listComments,
+              {
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number
+              }
+            );
+            const body = 'It appears you modified a `.po` or `.pot` file.  '
+              + 'These translation files are automatically generated, '
+              + 'pushed to, and pulled from Transifex, and should not be '
+              + 'modified otherwise.  If these changes are intended, please '
+              + 'add `' + skip_phrase + '` to the '
+              + 'PR body.';
+            comments.reverse();
+            const bot_comments = comments.filter(
+              comment => comment.user.type === 'Bot'
+              && comment.user.login === 'github-actions[bot]'
+              && comment.body === body
+            );
+            if (bot_comments.length > 0) {
+              console.log('Comment already exists.  Exiting.');
+              return;
+            }
+            console.log('Posting comment.');
+            await github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: body
+            });

.github/workflows/post-spell-check-result.yml

@@ -55,8 +55,12 @@ jobs:
               }
             );
             comments.reverse();
-            const bot_comments = comments.filter(comment => comment.user.type === 'Bot' && comment.user.login === 'github-actions[bot]');
-            if (bot_comments.length > 0 && bot_comments[0].body === body) {
+            const bot_comments = comments.filter(
+              comment => comment.user.type === 'Bot'
+              && comment.user.login === 'github-actions[bot]'
+              && comment.body === body
+            );
+            if (bot_comments.length > 0) {
               console.log("Comment already exists.  Exiting.");
               return;
             }

.github/workflows/pull-translations.yml

@@ -34,5 +34,5 @@ jobs:
           delete-branch: true
           base: master
           title: Routine i18n updates on ${{ steps.current-date.outputs.formattedTime }}
-          body: "#### Summary\nNone"
+          body: "#### Summary\nNone\n\n#### Additional context\n`Translation file changes are intended`"
           labels: Translation