electron/lib/node/init.ts

49 lines
1.9 KiB
TypeScript

// Initialize ASAR support in fs module.
import { wrapFsWithAsar } from './asar-fs-wrapper';
wrapFsWithAsar(require('fs'));
// Hook child_process.fork.
import cp = require('child_process'); // eslint-disable-line import/first
const originalFork = cp.fork;
cp.fork = (modulePath, args?, options?: cp.ForkOptions) => {
// Parse optional args.
if (args == null) {
args = [];
} else if (typeof args === 'object' && !Array.isArray(args)) {
options = args as cp.ForkOptions;
args = [];
}
// Fallback to original fork to report arg type errors.
if (typeof modulePath !== 'string' || !Array.isArray(args) ||
(typeof options !== 'object' && typeof options !== 'undefined')) {
return originalFork(modulePath, args, options);
}
// When forking a child script, we setup a special environment to make
// the electron binary run like upstream Node.js.
options = options ?? {};
options.env = Object.create(options.env || process.env);
options.env!.ELECTRON_RUN_AS_NODE = '1';
// On mac the child script runs in helper executable.
if (!options.execPath && process.platform === 'darwin') {
options.execPath = process.helperExecPath;
}
return originalFork(modulePath, args, options);
};
// Prevent Node from adding paths outside this app to search paths.
import path = require('path'); // eslint-disable-line import/first
const Module = require('module') as NodeJS.ModuleInternal;
const resourcesPathWithTrailingSlash = process.resourcesPath + path.sep;
const originalNodeModulePaths = Module._nodeModulePaths;
Module._nodeModulePaths = function (from) {
const paths: string[] = originalNodeModulePaths(from);
const fromPath = path.resolve(from) + path.sep;
// If "from" is outside the app then we do nothing.
if (fromPath.startsWith(resourcesPathWithTrailingSlash)) {
return paths.filter(function (candidate) {
return candidate.startsWith(resourcesPathWithTrailingSlash);
});
} else {
return paths;
}
};