message: scripts/prepare-release: read release version from root package instead
diff: @@ -28,9 +28,9 @@ const execFile = promisify(execFileCb);
  // All of these are considered to be main-line release branches
  const MAIN_BRANCHES = ['master', 'origin/master', 'changeset-release/master'];
  -// This prefix is used for patch branches, followed by the release version WITH a 'v' prefix
  +// This prefix is used for patch branches, followed by the release version
  // For example, `patch/v1.2.0`
  -const PATCH_BRANCH_PREFIX = 'patch/';
  +const PATCH_BRANCH_PREFIX = 'patch/v';
  const DEPENDENCY_TYPES = [
  'dependencies',
  @@ -39,21 +39,6 @@ const DEPENDENCY_TYPES = [
  'peerDependencies',
  ];
  -/**
  - * Returns the most recent release version on the main branch that is not a pre-release.
  - */
  -async function getPreviousReleaseVersion(repo) {
  - // TODO(Rugvip): Figure out which field to sort by to avoid manual sort after
  - const { stdout: tagsStr } = await execFile(
  - 'git',
  - ['tag', '--list', 'v*', '--merged=HEAD'],
  - { shell: true, cwd: repo.root.dir },
  - );
  - const tags = tagsStr.trim().split(/\r\n|\n/);
  - const [latestTag] = semver.rsort(tags).filter(t => !semver.prerelease(t));
  - return latestTag;
  -}
  -
  /**
  * Finds the tip of the patch branch of a given release version.
  * Returns undefined if no patch branch exists.
  @@ -187,10 +172,11 @@ async function applyPatchVersions(repo, patchVersions) {
  * the main branch, and then bumps all packages in the repo accordingly.
  */
  async function updatePackageVersions(repo) {
  - const previousRelease = await getPreviousReleaseVersion(repo);
  - console.log(`Found release version: ${previousRelease}`);
  + const rootPkgPath = path.resolve(repo.root.dir, 'package.json');
  + const { version: currentRelease } = await fs.readJson(rootPkgPath);
  + console.log(`Current release version: ${currentRelease}`);
  - const patchRef = await findTipOfPatchBranch(repo, previousRelease);
  + const patchRef = await findTipOfPatchBranch(repo, currentRelease);
  if (patchRef) {
  console.log(`Tip of the patch branch: ${patchRef}`);
  