Merge pull request #3073 from NomicFoundation/add-changeset-check

Add changeset check

.github/workflows/check-changeset-added.yml

@@ -0,0 +1,55 @@
+# Fails if a PR doesn't have a changeset and is not labeled
+# as "no changeset needed"
+
+name: Check that the PR has a changeset
+
+on:
+  pull_request:
+    branches:
+      - main
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - labeled
+      - unlabeled
+
+jobs:
+  check-if-changeset:
+    name: Check that PR has a changeset
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v6
+        with:
+          script: |
+            const pullNumber = context.issue.number;
+
+            const { data: files } = await github.rest.pulls.listFiles({
+              ...context.issue,
+              pull_number: pullNumber
+            });
+            const changeset = files.find(
+              file => file.status === "added" && file.filename.startsWith(".changeset/")
+            );
+            if (changeset !== undefined) {
+              console.log("Changeset found:", changeset.filename);
+              return;
+            }
+
+            console.log("No changeset found");
+
+
+            const { data: pull } = await github.rest.pulls.get({
+              ...context.issue,
+              pull_number: pullNumber
+            });
+            const noChangesetNeededLabel = pull.labels
+              .some(l => l.name === "no changeset needed");
+            if (noChangesetNeededLabel) {
+              console.log('The PR is labeled as "no changeset needed"');
+              return;
+            }
+
+            console.log('The PR is not labeled as "no changeset needed"');
+
+            process.exit(1);