283 lines
10 KiB
TypeScript
283 lines
10 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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// tslint:disable:no-console
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// TODO(alexeagle): why not import chalk from 'chalk'?
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// Something to do with TS default export in UMD emit...
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const chalk = require('chalk');
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import * as minimist from 'minimist';
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import * as path from 'path';
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import {SerializationOptions, generateGoldenFile, verifyAgainstGoldenFile, discoverAllEntrypoints} from './main';
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/** Name of the CLI */
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const CMD = 'ts-api-guardian';
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/** Name of the Bazel workspace that runs the CLI. */
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const bazelWorkspaceName = process.env.BAZEL_WORKSPACE;
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/**
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* Path to the Bazel workspace directory. Only set if the CLI is run with `bazel run`.
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* https://docs.bazel.build/versions/master/user-manual.html#run.
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*/
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const bazelWorkspaceDirectory = process.env.BUILD_WORKSPACE_DIRECTORY;
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/**
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* Regular expression that matches Bazel manifest paths that start with the
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* current Bazel workspace, followed by a path delimiter.
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*/
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const bazelWorkspaceManifestPathRegex =
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bazelWorkspaceName ? new RegExp(`^${bazelWorkspaceName}[/\\\\]`) : null;
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export function startCli() {
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const {argv, mode, errors} = parseArguments(process.argv.slice(2));
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const options: SerializationOptions = {
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stripExportPattern: [].concat(argv['stripExportPattern']),
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allowModuleIdentifiers: [].concat(argv['allowModuleIdentifiers']),
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};
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// Since the API guardian can be also used by other projects, we should not set up the default
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// Angular project tag rules unless specified explicitly through a given option.
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if (argv['useAngularTagRules']) {
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options.exportTags = {
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requireAtLeastOne: ['publicApi', 'codeGenApi'],
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banned: ['experimental'],
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toCopy: ['deprecated']
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};
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options.memberTags = {
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requireAtLeastOne: [],
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banned: ['experimental', 'publicApi', 'codeGenApi'],
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toCopy: ['deprecated']
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};
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options.paramTags = {
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requireAtLeastOne: [],
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banned: ['experimental', 'publicApi', 'codeGenApi'],
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toCopy: ['deprecated']
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};
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}
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// In autoDiscoverEntrypoints mode we set the inputed files as the discovered entrypoints
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// for the rootDir
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let entrypoints: string[];
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if (argv['autoDiscoverEntrypoints']) {
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entrypoints = discoverAllEntrypoints(argv['rootDir']);
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} else {
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entrypoints = argv._.slice();
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}
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for (const error of errors) {
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console.warn(error);
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}
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if (mode === 'help') {
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printUsageAndExit(!!errors.length);
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} else {
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const targets = resolveFileNamePairs(argv, mode, entrypoints);
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if (mode === 'out') {
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for (const {entrypoint, goldenFile} of targets) {
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generateGoldenFile(entrypoint, goldenFile, options);
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}
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} else { // mode === 'verify'
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let hasDiff = false;
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for (const {entrypoint, goldenFile} of targets) {
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const diff = verifyAgainstGoldenFile(entrypoint, goldenFile, options);
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if (diff) {
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hasDiff = true;
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const lines = diff.split('\n');
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if (lines.length) {
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lines.pop(); // Remove trailing newline
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}
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for (const line of lines) {
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const chalkMap:
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{[key: string]: any} = {'-': chalk.red, '+': chalk.green, '@': chalk.cyan};
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const chalkFunc = chalkMap[line[0]] || chalk.reset;
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console.log(chalkFunc(line));
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}
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}
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}
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if (hasDiff) {
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const bazelTarget = process.env['BAZEL_TARGET'];
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// Under bazel, give instructions how to use bazel run to accept the golden file.
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if (bazelTarget) {
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console.error('\n\nIf you modify a public API, you must accept the new golden file.');
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console.error('\n\nTo do so, execute the following Bazel target:');
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console.error(` yarn bazel run ${bazelTarget.replace(/_bin$/, '')}.accept`);
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if (process.env['TEST_WORKSPACE'] === 'angular') {
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console.error('\n\nFor more information, see');
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console.error(
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'\n https://github.com/angular/angular/blob/master/docs/PUBLIC_API.md#golden-files');
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}
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}
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process.exit(1);
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}
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}
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}
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}
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export function parseArguments(input: string[]):
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{argv: minimist.ParsedArgs, mode: string, errors: string[]} {
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let help = false;
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const errors: string[] = [];
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const argv = minimist(input, {
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string: [
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'out', 'outDir', 'verify', 'verifyDir', 'rootDir', 'stripExportPattern',
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'allowModuleIdentifiers'
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],
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boolean: [
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'help', 'useAngularTagRules', 'autoDiscoverEntrypoints',
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// Options used by chalk automagically
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'color', 'no-color'
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],
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alias: {'outFile': 'out', 'verifyFile': 'verify'},
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unknown: (option: string) => {
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if (option[0] === '-') {
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errors.push(`Unknown option: ${option}`);
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help = true;
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return false; // do not add to argv._
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} else {
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return true; // add to argv._
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}
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}
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});
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help = help || argv['help'];
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if (help) {
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return {argv, mode: 'help', errors};
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}
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let modes: string[] = [];
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if (argv['out']) {
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modes.push('out');
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}
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if (argv['outDir']) {
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modes.push('out');
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}
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if (argv['verify']) {
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modes.push('verify');
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}
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if (argv['verifyDir']) {
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modes.push('verify');
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}
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if (argv['autoDiscoverEntrypoints']) {
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if (!argv['rootDir']) {
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errors.push(`--rootDir must be provided with --autoDiscoverEntrypoints.`);
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modes = ['help'];
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}
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if (!argv['outDir'] && !argv['verifyDir']) {
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errors.push(`--outDir or --verifyDir must be used with --autoDiscoverEntrypoints.`);
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modes = ['help'];
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}
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} else {
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if (!argv._.length) {
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errors.push('No input file specified.');
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modes = ['help'];
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} else if (modes.length !== 1) {
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errors.push('Specify either --out[Dir] or --verify[Dir]');
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modes = ['help'];
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} else if (argv._.length > 1 && !argv['outDir'] && !argv['verifyDir']) {
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errors.push(`More than one input specified. Use --${modes[0]}Dir instead.`);
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modes = ['help'];
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}
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}
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return {argv, mode: modes[0], errors};
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}
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function printUsageAndExit(error = false) {
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const print = error ? console.warn.bind(console) : console.log.bind(console);
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print(`Usage: ${CMD} [options] <file ...>
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${CMD} --out <output file> <entrypoint .d.ts file>
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${CMD} --outDir <output dir> [--rootDir .] <entrypoint .d.ts files>
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${CMD} --verify <golden file> <entrypoint .d.ts file>
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${CMD} --verifyDir <golden file dir> [--rootDir .] <entrypoint .d.ts files>
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Options:
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--help Show this usage message
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--out <file> Write golden output to file
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--outDir <dir> Write golden file structure to directory
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--verify <file> Read golden input from file
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--verifyDir <dir> Read golden file structure from directory
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--rootDir <dir> Specify the root directory of input files
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--useAngularTagRules <boolean> Whether the Angular specific tag rules should be used.
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--stripExportPattern <regexp> Do not output exports matching the pattern
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--allowModuleIdentifiers <identifier>
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Allow identifier for "* as foo" imports
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--autoDiscoverEntrypoints Automatically find all entrypoints .d.ts files in the rootDir`);
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process.exit(error ? 1 : 0);
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}
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/**
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* Resolves a given path in the file system. If `ts-api-guardian` runs with Bazel, file paths
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* are resolved through runfiles. Additionally in Bazel, this method handles the case where
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* manifest file paths are not existing, but need to resolve to the Bazel workspace directory.
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* This happens commonly when goldens are approved, but the golden file does not exist yet.
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*/
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function resolveFilePath(fileName: string): string {
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// If an absolute path is specified, the path is already resolved.
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if (path.isAbsolute(fileName)) {
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return fileName;
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}
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// Outside of Bazel, file paths are resolved based on the current working directory.
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if (!bazelWorkspaceName) {
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return path.resolve(fileName);
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}
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// In Bazel, we first try to resolve the file through the runfiles. We do this by calling
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// the `require.resolve` function that is patched by the Bazel NodeJS rules. Note that we
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// need to catch errors because files inside tree artifacts cannot be resolved through
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// runfile manifests. Hence, we need to have alternative resolution logic when resolving
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// file paths. Additionally, it could happen that manifest paths which aren't part of the
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// runfiles are specified (i.e. golden is approved but does not exist in the workspace yet).
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try {
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return require.resolve(fileName);
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} catch {
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}
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// This handles cases where file paths cannot be resolved through runfiles. This happens
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// commonly when goldens are approved while the golden does not exist in the workspace yet.
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// In those cases, we want to build up a relative path based on the manifest path, and join
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// it with the absolute bazel workspace directory (which is only set in `bazel run`).
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// e.g. `angular/goldens/<..>/common` should become `{workspace_dir}/goldens/<...>/common`.
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if (bazelWorkspaceManifestPathRegex !== null && bazelWorkspaceDirectory &&
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bazelWorkspaceManifestPathRegex.test(fileName)) {
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return path.join(bazelWorkspaceDirectory, fileName.substr(bazelWorkspaceName.length + 1));
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}
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throw Error(`Could not resolve file path in runfiles: ${fileName}`);
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}
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function resolveFileNamePairs(argv: minimist.ParsedArgs, mode: string, entrypoints: string[]):
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{entrypoint: string, goldenFile: string}[] {
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if (argv[mode]) {
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return [{
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entrypoint: resolveFilePath(entrypoints[0]),
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goldenFile: resolveFilePath(argv[mode]),
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}];
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} else { // argv[mode + 'Dir']
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let rootDir = argv['rootDir'] || '.';
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const goldenDir = argv[mode + 'Dir'];
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return entrypoints.map((fileName: string) => {
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return {
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entrypoint: resolveFilePath(fileName),
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goldenFile: resolveFilePath(path.join(goldenDir, path.relative(rootDir, fileName))),
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};
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});
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}
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}
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