124 lines
3.9 KiB
TypeScript
124 lines
3.9 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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import {existsSync} from 'fs';
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import {join} from 'path';
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import {exec} from 'shelljs';
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import {isTsNodeAvailable} from './ts-node';
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/**
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* Describes the Github configuration for dev-infra. This configuration is
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* used for API requests, determining the upstream remote, etc.
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*/
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export interface GithubConfig {
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/** Owner name of the repository. */
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owner: string;
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/** Name of the repository. */
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name: string;
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}
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/** The common configuration for ng-dev. */
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type CommonConfig = {
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github: GithubConfig
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};
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/**
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* The configuration for the specific ng-dev command, providing both the common
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* ng-dev config as well as the specific config of a subcommand.
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*/
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export type NgDevConfig<T = {}> = CommonConfig&T;
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/**
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* The filename expected for creating the ng-dev config, without the file
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* extension to allow either a typescript or javascript file to be used.
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*/
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const CONFIG_FILE_NAME = '.ng-dev-config';
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/** The configuration for ng-dev. */
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let CONFIG: {}|null = null;
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/**
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* Get the configuration from the file system, returning the already loaded
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* copy if it is defined.
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*/
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export function getConfig(): NgDevConfig {
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// If the global config is not defined, load it from the file system.
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if (CONFIG === null) {
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// The full path to the configuration file.
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const configPath = join(getRepoBaseDir(), CONFIG_FILE_NAME);
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// Set the global config object.
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CONFIG = readConfigFile(configPath);
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}
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// Return a clone of the global config to ensure that a new instance of the config is returned
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// each time, preventing unexpected effects of modifications to the config object.
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return validateCommonConfig({...CONFIG});
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}
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/** Validate the common configuration has been met for the ng-dev command. */
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function validateCommonConfig(config: Partial<NgDevConfig>) {
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const errors: string[] = [];
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// Validate the github configuration.
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if (config.github === undefined) {
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errors.push(`Github repository not configured. Set the "github" option.`);
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} else {
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if (config.github.name === undefined) {
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errors.push(`"github.name" is not defined`);
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}
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if (config.github.owner === undefined) {
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errors.push(`"github.owner" is not defined`);
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}
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}
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assertNoErrors(errors);
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return config as NgDevConfig;
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}
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/** Resolves and reads the specified configuration file. */
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function readConfigFile(configPath: string): object {
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// If the the `.ts` extension has not been set up already, and a TypeScript based
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// version of the given configuration seems to exist, set up `ts-node` if available.
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if (require.extensions['.ts'] === undefined && existsSync(`${configPath}.ts`) &&
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isTsNodeAvailable()) {
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require('ts-node').register({skipProject: true, transpileOnly: true});
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}
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try {
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return require(configPath)
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} catch (e) {
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console.error('Could not read configuration file.');
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console.error(e);
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process.exit(1);
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}
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}
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/**
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* Asserts the provided array of error messages is empty. If any errors are in the array,
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* logs the errors and exit the process as a failure.
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*/
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export function assertNoErrors(errors: string[]) {
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if (errors.length == 0) {
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return;
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}
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console.error(`Errors discovered while loading configuration file:`);
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for (const error of errors) {
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console.error(` - ${error}`);
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}
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process.exit(1);
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}
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/** Gets the path of the directory for the repository base. */
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export function getRepoBaseDir() {
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const baseRepoDir = exec(`git rev-parse --show-toplevel`, {silent: true});
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if (baseRepoDir.code) {
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throw Error(
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`Unable to find the path to the base directory of the repository.\n` +
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`Was the command run from inside of the repo?\n\n` +
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`ERROR:\n ${baseRepoDir.stderr}`);
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}
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return baseRepoDir.trim();
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}
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