Inject script into multiple process when using child_process.fork.
One of the use case is Multiple Process Code Coverage with istanbul.
$ npm i childprocessrequire('childprocess').inject(function(modulePath, args, opt) {
const execFile = 'path/to/istanbul';
const cwd = opt.cwd && process.cwd();
const execArgs = [
'cover',
'--root', cwd,
'--dir', path.join(cwd, './coverage'),
'--report', 'none',
'--print', 'none',
'--include-pid',
modulePath,
'--',
].concat(args);
return [execFile, execArgs, opt];
});
require('child_process').fork();Inject script when using child_process.fork.
The inject script is a function that running in sandbox in every process. that mean you can't use the variable out of the function.
The function should return an array that contains 3 arguments same as fork.
childprocess.inject(function(modulePath, args, opt) {
return [modulePath, args, opt];
});Use child_process.fork without injected script.