ci(release): sync github release notes from changelog

scripts/sync-release-notes-from-changelog.mjs

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+import { execFileSync } from "node:child_process";
+import { mkdtempSync, readFileSync, rmSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import path from "node:path";
+
+const headingPattern = /^##\s+\[?([^\]\s]+)\]?\s*-\s*([0-9]{4}-[0-9]{2}-[0-9]{2})\s*$/;
+
+function usageAndExit(code = 1) {
+  const usage = `
+Usage: node scripts/sync-release-notes-from-changelog.mjs [options]
+
+Options:
+  --repo <owner/repo>       Repository slug. Defaults to $GITHUB_REPOSITORY.
+  --tag <tag>               Release tag (e.g. v0.1.14). Defaults to latest changelog entry.
+  --create-if-missing       Create release if it does not already exist.
+`;
+  process.stderr.write(usage.trimStart());
+  process.stderr.write("\n");
+  process.exit(code);
+}
+
+function parseArgs(argv) {
+  const args = {
+    repo: process.env.GITHUB_REPOSITORY || "",
+    tag: "",
+    createIfMissing: false,
+  };
+
+  for (let index = 0; index < argv.length; index += 1) {
+    const arg = argv[index];
+    if (arg === "--repo") {
+      const value = argv[index + 1];
+      if (!value) {
+        usageAndExit();
+      }
+      args.repo = value;
+      index += 1;
+      continue;
+    }
+
+    if (arg === "--tag") {
+      const value = argv[index + 1];
+      if (!value) {
+        usageAndExit();
+      }
+      args.tag = value;
+      index += 1;
+      continue;
+    }
+
+    if (arg === "--create-if-missing") {
+      args.createIfMissing = true;
+      continue;
+    }
+
+    usageAndExit();
+  }
+
+  if (!args.repo) {
+    throw new Error("Missing repository. Pass --repo or set GITHUB_REPOSITORY.");
+  }
+
+  return args;
+}
+
+function normalizeTag(rawTag) {
+  const trimmed = rawTag.trim().replace(/^refs\/tags\//, "");
+  return trimmed.startsWith("v") ? trimmed : `v${trimmed}`;
+}
+
+function parseChangelog(changelogText) {
+  const lines = changelogText.split(/\r?\n/);
+  const headings = [];
+
+  for (let index = 0; index < lines.length; index += 1) {
+    const line = lines[index];
+    const match = line.match(headingPattern);
+    if (!match) {
+      continue;
+    }
+
+    headings.push({
+      version: match[1],
+      date: match[2],
+      headingLineIndex: index,
+    });
+  }
+
+  if (headings.length === 0) {
+    throw new Error(
+      "No release headings found in CHANGELOG.md. Expected headings like `## 0.1.14 - 2026-02-19`."
+    );
+  }
+
+  return headings.map((heading, index) => {
+    const nextHeading = headings[index + 1];
+    const bodyStart = heading.headingLineIndex + 1;
+    const bodyEnd = nextHeading ? nextHeading.headingLineIndex : lines.length;
+
+    const bodyLines = lines.slice(bodyStart, bodyEnd);
+    while (bodyLines.length > 0 && bodyLines[0].trim() === "") {
+      bodyLines.shift();
+    }
+    while (bodyLines.length > 0 && bodyLines[bodyLines.length - 1].trim() === "") {
+      bodyLines.pop();
+    }
+
+    const notesParts = [`## ${heading.version} - ${heading.date}`];
+    if (bodyLines.length > 0) {
+      notesParts.push("", ...bodyLines);
+    }
+
+    return {
+      ...heading,
+      tag: `v${heading.version}`,
+      notes: `${notesParts.join("\n").trim()}\n`,
+    };
+  });
+}
+
+function hasRelease(tag, repo) {
+  try {
+    execFileSync("gh", ["release", "view", tag, "--repo", repo], {
+      stdio: "ignore",
+    });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+function runGh(args) {
+  execFileSync("gh", args, { stdio: "inherit" });
+}
+
+function main() {
+  const args = parseArgs(process.argv.slice(2));
+  const changelogPath = path.resolve("CHANGELOG.md");
+  const changelogText = readFileSync(changelogPath, "utf8");
+  const entries = parseChangelog(changelogText);
+
+  const targetTag = args.tag ? normalizeTag(args.tag) : entries[0].tag;
+  const targetEntry = entries.find((entry) => entry.tag === targetTag);
+
+  if (!targetEntry) {
+    throw new Error(
+      `No matching changelog section found for ${targetTag}.`
+    );
+  }
+
+  const tempDir = mkdtempSync(path.join(tmpdir(), "paseo-release-notes-"));
+  const notesPath = path.join(tempDir, `${targetTag}-notes.md`);
+  writeFileSync(notesPath, targetEntry.notes);
+
+  try {
+    if (hasRelease(targetTag, args.repo)) {
+      runGh([
+        "release",
+        "edit",
+        targetTag,
+        "--repo",
+        args.repo,
+        "--notes-file",
+        notesPath,
+      ]);
+      console.log(`Updated release notes for ${targetTag}.`);
+      return;
+    }
+
+    if (!args.createIfMissing) {
+      console.log(
+        `Release ${targetTag} not found. Skipping because --create-if-missing was not provided.`
+      );
+      return;
+    }
+
+    try {
+      runGh([
+        "release",
+        "create",
+        targetTag,
+        "--repo",
+        args.repo,
+        "--title",
+        `Paseo ${targetTag}`,
+        "--notes-file",
+        notesPath,
+        "--verify-tag",
+      ]);
+      console.log(`Created release ${targetTag} with changelog notes.`);
+    } catch (createError) {
+      console.warn(
+        `Release creation failed for ${targetTag}; attempting edit in case another workflow created it concurrently.`
+      );
+      runGh([
+        "release",
+        "edit",
+        targetTag,
+        "--repo",
+        args.repo,
+        "--notes-file",
+        notesPath,
+      ]);
+      console.log(`Updated release notes for ${targetTag} after create race.`);
+
+      if (createError instanceof Error) {
+        console.warn(createError.message);
+      }
+    }
+  } finally {
+    rmSync(tempDir, { force: true, recursive: true });
+  }
+}
+
+main();