build: add script to publish release

package.json

@@ -24,6 +24,7 @@
     "breaking-changes": "gulp breaking-changes",
     "gulp": "gulp",
     "stage-release": "ts-node --project tools/release/ tools/release/stage-release.ts",
+    "publish-release": "ts-node --project tools/release/ tools/release/publish-release.ts",
     "preinstall": "node ./tools/npm/check-npm.js"
   },
   "version": "7.2.0",

tools/release/base-release-task.ts

@@ -0,0 +1,81 @@
+import {green, italic, red, yellow} from 'chalk';
+import {prompt} from 'inquirer';
+import {GitClient} from './git/git-client';
+import {Version} from './version-name/parse-version';
+import {getAllowedPublishBranches} from './version-name/publish-branches';
+
+/**
+ * Base release task class that contains shared methods that are commonly used across
+ * the staging and publish script.
+ */
+export class BaseReleaseTask {
+
+  constructor(public git: GitClient) {}
+
+  /** Checks if the user is on an allowed publish branch for the specified version. */
+  protected switchToPublishBranch(newVersion: Version): string {
+    const allowedBranches = getAllowedPublishBranches(newVersion);
+    const currentBranchName = this.git.getCurrentBranch();
+
+    // If current branch already matches one of the allowed publish branches, just continue
+    // by exiting this function and returning the currently used publish branch.
+    if (allowedBranches.includes(currentBranchName)) {
+      console.log(green(`  ✓   Using the "${italic(currentBranchName)}" branch.`));
+      return currentBranchName;
+    }
+
+    // In case there are multiple allowed publish branches for this version, we just
+    // exit and let the user decide which branch they want to release from.
+    if (allowedBranches.length !== 1) {
+      console.warn(yellow('  ✘   You are not on an allowed publish branch.'));
+      console.warn(yellow(`      Please switch to one of the following branches: ` +
+        `${allowedBranches.join(', ')}`));
+      process.exit(0);
+    }
+
+    // For this version there is only *one* allowed publish branch, so we could
+    // automatically switch to that branch in case the user isn't on it yet.
+    const defaultPublishBranch = allowedBranches[0];
+
+    if (!this.git.checkoutBranch(defaultPublishBranch)) {
+      console.error(red(`  ✘   Could not switch to the "${italic(defaultPublishBranch)}" ` +
+        `branch.`));
+      console.error(red(`      Please ensure that the branch exists or manually switch to the ` +
+        `branch.`));
+      process.exit(1);
+    }
+
+    console.log(green(`  ✓   Switched to the "${italic(defaultPublishBranch)}" branch.`));
+  }
+
+  /** Verifies that the local branch is up to date with the given publish branch. */
+  protected verifyLocalCommitsMatchUpstream(publishBranch: string) {
+    const upstreamCommitSha = this.git.getRemoteCommitSha(publishBranch);
+    const localCommitSha = this.git.getLocalCommitSha('HEAD');
+
+    // Check if the current branch is in sync with the remote branch.
+    if (upstreamCommitSha !== localCommitSha) {
+      console.error(red(`  ✘ The current branch is not in sync with the remote branch. Please ` +
+        `make sure your local branch "${italic(publishBranch)}" is up to date.`));
+      process.exit(1);
+    }
+  }
+
+  /** Verifies that there are no uncommitted changes in the project. */
+  protected verifyNoUncommittedChanges() {
+    if (this.git.hasUncommittedChanges()) {
+      console.error(red(`  ✘   There are changes which are not committed and should be ` +
+        `discarded.`));
+      process.exit(1);
+    }
+  }
+
+  /** Prompts the user with a confirmation question and a specified message. */
+  protected async promptConfirm(message: string): Promise<boolean> {
+    return (await prompt<{result: boolean}>({
+      type: 'confirm',
+      name: 'result',
+      message: message,
+    })).result;
+  }
+}

tools/release/git/git-client.ts

@@ -52,5 +52,16 @@ export class GitClient {
   createNewCommit(message: string): boolean {
     return spawnSync('git', ['commit', '-m', message], {cwd: this.projectDir}).status === 0;
   }
+
+  /** Gets the title of a specified commit reference. */
+  getCommitTitle(commitRef: string): string {
+    return spawnSync('git', ['log', '-n1', '--format', '%s', commitRef], {cwd: this.projectDir})
+      .stdout.toString().trim();
+  }
+
+  /** Creates a tag for the specified commit reference. */
+  createTag(commitRef: string, tagName: string, message: string): boolean {
+    return spawnSync('git', ['tag', tagName, '-m', message], {cwd: this.projectDir}).status === 0;
+  }
 }
 

tools/release/git/github-urls.ts

@@ -2,3 +2,8 @@
 export function getGithubBranchCommitsUrl(owner: string, repository: string, branchName: string) {
   return `https://github.com/${owner}/${repository}/commits/${branchName}`;
 }
+
+/** Gets a Github URL that refers list of releases within the specified repository. */
+export function getGithubReleasesUrl(owner: string, repository: string) {
+  return `https://github.com/${owner}/${repository}/releases`;
+}

tools/release/npm/npm-client.ts

@@ -0,0 +1,44 @@
+import {spawnSync} from 'child_process';
+
+/**
+ * Process environment that does not refer to Yarn's package registry. Since the scripts are
+ * usually run through Yarn, we need to update the "npm_config_registry" so that NPM is able to
+ * properly run "npm login" and "npm publish".
+ */
+const npmClientEnvironment = {
+  ...process.env,
+  // See https://docs.npmjs.com/misc/registry for the official documentation of the NPM registry.
+  npm_config_registry: 'https://registry.npmjs.org',
+};
+
+/** Checks whether NPM is currently authenticated. */
+export function isNpmAuthenticated(): boolean {
+  return spawnSync('npm', ['whoami'], {
+    shell: true,
+    env: npmClientEnvironment,
+  }).stdout.toString() !== '';
+}
+
+/** Runs "npm login" interactively by piping stdin/stderr/stdout to the current tty. */
+export function runInteractiveNpmLogin(): boolean {
+  return spawnSync('npm', ['login'], {
+    stdio: 'inherit',
+    shell: true,
+    env: npmClientEnvironment,
+  }).status === 0;
+}
+
+/** Runs NPM publish within a specified directory */
+export function runNpmPublish(packagePath: string, distTag: string): string | null {
+  const result = spawnSync('npm', ['publish', '--access', 'public', '--tag', distTag], {
+    cwd: packagePath,
+    shell: true,
+    env: npmClientEnvironment,
+  });
+
+  // We only want to return an error if the exit code is not zero. NPM by default prints the
+  // logging messages to "stdout" and therefore just checking for "stdout" is not reliable.
+  if (result.status !== 0) {
+    return result.stderr.toString();
+  }
+}

tools/release/prompt/npm-dist-tag-prompt.ts

@@ -0,0 +1,40 @@
+import {prompt} from 'inquirer';
+import {Version} from '../version-name/parse-version';
+
+/** Inquirer choice for selecting the "latest" npm dist-tag. */
+const LATEST_TAG_CHOICE = {value: 'latest', name: 'Latest'};
+
+/** Inquirer choice for selecting the "next" npm dist-tag. */
+const NEXT_TAG_CHOICE = {value: 'next', name: 'Next'};
+
+/**
+ * Prompts the current user-input interface for a npm dist-tag. The provided npm-dist tag
+ * will be validated against the specified version and prevents that any pre-releases
+ * will be published under the "latest" npm dist tag. Read more about conventions for
+ * NPM dist tags here: https://docs.npmjs.com/cli/dist-tag
+ */
+export async function promptForNpmDistTag(version: Version): Promise<string> {
+  const {distTag} = await prompt<{distTag: string}>({
+    type: 'list',
+    name: 'distTag',
+    message: 'What is the NPM dist-tag you want to publish to?',
+    choices: getDistTagChoicesForVersion(version),
+  });
+
+  return distTag;
+}
+
+/**
+ * Determines all allowed npm dist-tag choices for a specified version. For example,
+ * a pre-release version should be never published to the "latest" tag.
+ */
+export function getDistTagChoicesForVersion(version: Version) {
+  const {prereleaseLabel} = version;
+
+  if (!prereleaseLabel) {
+    return [LATEST_TAG_CHOICE, NEXT_TAG_CHOICE];
+  }
+
+  return [NEXT_TAG_CHOICE];
+}
+