npm-run
Run executables in node_modules from the command-line
Use npm-run to ensure you're using the same version of a package on the command-line and in package.json scripts.
Any executable available to an npm lifecycle script is available to npm-run.
Usage
> npm install mocha # mocha installed in ./node_modules
> npm-run mocha test/* # uses locally installed mocha executable > npm-run --help
Usage: npm-run command [...args]
Options:
--version Display version & exit.
--help Display this help & exit.
Hint: to print augmented path use:
npm-run node -p process.env.PATHInstallation
> npm install -g npm-runProgrammatic API
The API of npm-run basically wraps core child_process methods (exec, spawn, etc) such that locally install package executables will be on the PATH when the command runs.
npmRun(command[, options], callback)
Alias of npmRun.exec.
npmRun.exec(command[, options], callback)
Takes same arguments as node's exec.
npmRun.exec('mocha --debug-brk --sort', {cwd: __dirname + '/tests'}, function (err, stdout, stderr) {
// err Error or null if there was no error
// stdout Buffer|String
// stderr Buffer|String
})npmRun.sync(command[, options])
Alias of npmRun.execSync
npmRun.execSync(command[, options])
Takes same arguments as node's execSync.
var stdout = npmRun.execSync(
'mocha --debug-brk --sort',
{cwd: __dirname + '/tests'}
)
stdout // command output as Buffer|StringnpmRun.spawnSync(command[, args][, options])
Takes same arguments as node's spawnSync.
var child = npmRun.spawnSync(
'mocha',
'--debug-brk --sort'.split(' '),
{cwd: __dirname + '/tests'}
)
child.stdout // stdout Buffer|String
child.stderr // stderr Buffer|String
child.status // exit codenpmRun.spawn(command[, args][, options])
Takes same arguments as node's spawn.
var child = npmRun.spawn(
'mocha',
'--debug-brk --sort'.split(' '),
{cwd: __dirname + '/tests'}
)
child.stdout // stdout Stream
child.stderr // stderr Stream
child.on('exit', function (code) {
code // exit code
})Why
Due to npm's install algorithm node_modules/.bin is not guaranteed to contain your executable. npm-run uses the same mechanism npm uses to locate the correct executable.
See Also
License
MIT