Positional arguments in `npm run-script`

[piranna]

promise-spawn/lib/index.js

Lines 116 to 123 in 8e99175

	} else {
	for (const arg of args) {
	script += ` ${escape.sh(arg)}`
	}
	realArgs.push('-c', script)
	}
	return promiseSpawn(command, realArgs, options, extra)

We are concatenating the user provided arguments to the command_string, but POSIX shell -c flag allow extra arguments, one to set the $0 (process name) of the executed script from the command_string, and next ones to define the other positional arguments ($1, $2, $3...). It seems like a dumb change, but since we are just concatenating the strings to the real_args variable, $@ and $* are shown as empty, so for example it's not possible to use variables expansion with them like eslint ${@:-.} on package.json scripts to set current directory as default value if files argument are not provided when executing npm run.