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Process.js
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Process.js
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/**
* Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
*/
import {ChildProcess, spawn} from 'child_process';
import ProjectWorkspace from './project_workspace';
import type {SpawnOptions} from './types';
/**
* Spawns and returns a Jest process with specific args
*
* @param {string[]} args
* @returns {ChildProcess}
*/
export const createProcess = (
workspace: ProjectWorkspace,
args: Array<string>,
options?: SpawnOptions = {},
): ChildProcess => {
// A command could look like `npm run test`, which we cannot use as a command
// as they can only be the first command, so take out the command, and add
// any other bits into the args
const runtimeExecutable = workspace.pathToJest;
const parameters = runtimeExecutable.split(' ');
const command = parameters[0];
const initialArgs = parameters.slice(1);
const runtimeArgs = [].concat(initialArgs, args);
// If a path to configuration file was defined, push it to runtimeArgs
if (workspace.pathToConfig) {
runtimeArgs.push('--config');
runtimeArgs.push(workspace.pathToConfig);
}
// To use our own commands in create-react, we need to tell the command that
// we're in a CI environment, or it will always append --watch
const env = process.env;
env['CI'] = 'true';
const spawnOptions = {
cwd: workspace.rootPath,
env,
shell: options.shell,
};
return spawn(command, runtimeArgs, spawnOptions);
};