angular-cn/aio/aio-builds-setup/dockerbuild/scripts-js/lib/common/utils.ts

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import {basename, resolve as resolvePath} from 'path';
import {SHORT_SHA_LEN} from './constants';
/**
* Shorten a SHA to make it more readable
* @param sha The SHA to shorten.
*/
export function computeShortSha(sha: string) {
return sha.substr(0, SHORT_SHA_LEN);
}
/**
* Compute the path for a downloaded artifact file.
* @param downloadsDir The directory where artifacts are downloaded
* @param pr The PR associated with this artifact.
* @param sha The SHA associated with the build for this artifact.
* @param artifactPath The path to the artifact on CircleCI.
* @returns The fully resolved location for the specified downloaded artifact.
*/
export function computeArtifactDownloadPath(downloadsDir: string, pr: number, sha: string, artifactPath: string) {
return resolvePath(downloadsDir, `${pr}-${computeShortSha(sha)}-${basename(artifactPath)}`);
}
/**
* Extract the PR number and latest commit SHA from a downloaded file path.
* @param downloadPath the path to the downloaded file.
* @returns An object whose keys are the PR and SHA extracted from the file path.
*/
export function getPrInfoFromDownloadPath(downloadPath: string) {
const file = basename(downloadPath);
const [pr, sha] = file.split('-');
return {pr: +pr, sha};
}
/**
* Assert that a value is true.
* @param value The value to assert.
* @param message The message if the value is not true.
*/
export function assert(value: boolean, message: string) {
if (!value) {
throw new Error(message);
}
}
/**
* Assert that a parameter is not equal to "".
* @param name The name of the parameter.
* @param value The value of the parameter.
*/
export const assertNotMissingOrEmpty = (name: string, value: string | null | undefined) => {
assert(!!value, `Missing or empty required parameter '${name}'!`);
};
/**
* Get an environment variable.
* @param name The name of the environment variable.
* @param isOptional True if the variable is optional.
* @returns The value of the variable or "" if it is optional and falsy.
* @throws `Error` if the variable is falsy and not optional.
*/
export const getEnvVar = (name: string, isOptional = false): string => {
const value = process.env[name];
if (!isOptional && !value) {
try {
throw new Error(`ERROR: Missing required environment variable '${name}'!`);
} catch (error) {
console.error(error.stack);
process.exit(1);
}
}
return value || '';
};
/**
* A basic logger implementation.
* Delegates to `console`, but prepends each message with the current date and specified scope (i.e caller).
*/
export class Logger {
private padding = ' '.repeat(20 - this.scope.length);
/**
* Create a new `Logger` instance for the specified `scope`.
* @param scope The logger's scope (added to all messages).
*/
constructor(private scope: string) {}
public error(...args: any[]) { this.callMethod('error', args); }
public info(...args: any[]) { this.callMethod('info', args); }
public log(...args: any[]) { this.callMethod('log', args); }
public warn(...args: any[]) { this.callMethod('warn', args); }
private callMethod(method: 'error' | 'info' | 'log' | 'warn', args: any[]) {
console[method](`[${new Date()}]`, `${this.scope}:${this.padding}`, ...args);
}
}