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TempDir.ts
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TempDir.ts
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import * as fs from 'mz/fs';
import * as path from 'path';
import * as mkdirp from 'mkdirp';
import { getLogger } from 'log4js';
import { deleteDir } from './fileUtils';
export class TempDir {
private readonly log = getLogger(TempDir.name);
baseTempFolder: string;
tempFolder: string;
private constructor() { }
initialize(tempDirName: string) {
this.baseTempFolder = path.join(process.cwd(), tempDirName);
this.tempFolder = path.join(this.baseTempFolder, this.random().toString());
this.log.debug(`Using stryker temp folder ${this.baseTempFolder}`);
mkdirp.sync(this.baseTempFolder);
mkdirp.sync(this.tempFolder);
}
/**
* Creates a new random folder with the specified prefix.
* @param prefix The prefix.
* @returns The path to the folder.
*/
createRandomFolder(prefix: string): string {
if (!this.baseTempFolder) {
throw new Error('initialize() was not called!');
}
let dir = this.baseTempFolder + path.sep + prefix + this.random();
mkdirp.sync(dir);
return dir;
}
/**
* Copies a file.
* @param fromFilename The path to the existing file.
* @param toFilename The path to copy the file to.
* @param instrumenter An optional additional instrumenter to stream the file through
* @returns A promise to eventually copy the file.
*/
copyFile(fromFilename: string, toFilename: string, instrumenter: NodeJS.ReadWriteStream | null): Promise<void> {
return new Promise<void>((resolve, reject) => {
let readStream: NodeJS.ReadableStream = fs.createReadStream(fromFilename, { encoding: 'utf8' });
const writeStream = fs.createWriteStream(toFilename);
readStream.on('error', reject);
writeStream.on('error', reject);
if (instrumenter) {
readStream = readStream.pipe(instrumenter);
}
readStream.pipe(writeStream);
readStream.on('end', () => resolve());
});
}
/**
* Deletes the Stryker-temp folder
*/
clean() {
if (!this.baseTempFolder) {
throw new Error('initialize() was not called!');
}
this.log.debug(`Deleting stryker temp folder ${this.baseTempFolder}`);
return deleteDir(this.baseTempFolder)
.catch(() => this.log.info(`Failed to delete stryker temp folder ${this.baseTempFolder}`));
}
/**
* Creates a random integer number.
* @returns A random integer.
*/
random(): number {
return Math.ceil(Math.random() * 10000000);
}
private static _instance: TempDir;
static instance() {
if (!this._instance) {
this._instance = new TempDir();
}
return this._instance;
}
}