chore: import upstream snapshot with attribution

.github/workflows/release-note.js

@@ -0,0 +1,129 @@
+async function fetchRepoLabels({ github, owner, repo }) {
+  const { data } = await github.rest.issues.listLabelsForRepo({
+    owner,
+    repo,
+    per_page: 100, // the default value is 30, which is too small to fetch all labels
+  });
+  return data.map(({ name }) => name);
+}
+
+async function fetchPrLabels({ github, owner, repo, issue_number }) {
+  const { data } = await github.rest.issues.listLabelsOnIssue({
+    owner,
+    repo,
+    issue_number,
+  });
+  return data.map(({ name }) => name);
+}
+
+function isReleaseNoteLabel(name) {
+  return name.startsWith("rn/");
+}
+
+async function validateLabeled({ core, context, github }) {
+  const { user, html_url: pr_url } = context.payload.pull_request;
+  const { owner, repo } = context.repo;
+  const { number: issue_number } = context.issue;
+
+  // Skip validation on pull requests created by the automation bot
+  if (user.login === "mlflow-app[bot]") {
+    console.log("This pull request was created by the automation bot, skipping");
+    return;
+  }
+
+  const repoLabels = await fetchRepoLabels({ github, owner, repo });
+  const releaseNoteLabels = repoLabels.filter(isReleaseNoteLabel);
+
+  // Fetch the release-note category labels applied on this PR
+  const fetchAppliedLabels = async () => {
+    const backoffs = [0, 1, 2, 4, 8, 16];
+    for (const [index, backoff] of backoffs.entries()) {
+      console.log(`Attempt ${index + 1}/${backoffs.length}`);
+      await new Promise((r) => setTimeout(r, backoff * 1000));
+      const prLabels = await fetchPrLabels({
+        github,
+        owner,
+        repo,
+        issue_number,
+      });
+      const prReleaseNoteLabels = prLabels.filter((name) => releaseNoteLabels.includes(name));
+
+      if (prReleaseNoteLabels.length > 0) {
+        return prReleaseNoteLabels;
+      }
+    }
+    return [];
+  };
+
+  const prReleaseNoteLabels = await fetchAppliedLabels();
+
+  // If no release note category label is applied to this PR, set the action status to "failed"
+  if (prReleaseNoteLabels.length === 0) {
+    // Make sure '.github/pull_request_template.md' contains an HTML anchor with this name
+    const anchorName = "release-note-category";
+
+    // Fragmented URL to jump to the release note category section in the PR description
+    const anchorUrl = `${pr_url}#user-content-${anchorName}`;
+    const message = [
+      "No release-note label is applied to this PR. ",
+      `Please select a checkbox in the release note category section: ${anchorUrl} `,
+      "or manually apply a release note category label (e.g. 'rn/bug-fix') ",
+      "if you're a maintainer of this repository. ",
+      "If this job failed when a release note category label is already applied, ",
+      "please re-run it.",
+    ].join("");
+    core.setFailed(message);
+  }
+}
+
+async function postMerge({ context, github }) {
+  const { user } = context.payload.pull_request;
+  const { owner, repo } = context.repo;
+  const { number: issue_number } = context.issue;
+
+  if (user.login === "mlflow-app[bot]") {
+    console.log("This PR was created by the automation bot, skipping");
+    return;
+  }
+
+  const repoLabels = await fetchRepoLabels({ github, owner, repo });
+  const releaseNoteLabels = repoLabels.filter(isReleaseNoteLabel);
+  const prLabels = await fetchPrLabels({
+    github,
+    owner,
+    repo,
+    issue_number,
+  });
+  const prReleaseNoteLabels = prLabels.filter((name) => releaseNoteLabels.includes(name));
+
+  if (prReleaseNoteLabels.length === 0) {
+    const pull = await github.rest.pulls.get({
+      owner,
+      repo,
+      pull_number: issue_number,
+    });
+    const { login: mergedBy } = pull.data.merged_by;
+    const noneLabel = "rn/none";
+    const body = [
+      `@${mergedBy} This PR is missing a release-note label, adding \`${noneLabel}\`. `,
+      "If this label is incorrect, please replace it with the correct label.",
+    ].join("");
+    await github.rest.issues.createComment({
+      owner,
+      repo,
+      issue_number,
+      body,
+    });
+    await github.rest.issues.addLabels({
+      owner,
+      repo,
+      issue_number,
+      labels: [noneLabel],
+    });
+  }
+}
+
+module.exports = {
+  validateLabeled,
+  postMerge,
+};