how to pass options to scripts using npm babel and commanderjs [duplicate]

Question

Could someone explain me why i have troubles retrieving the option '-x' (see below)?

Do I have to escape some characters ?

Beyond that:

why this is working: node b.js parse url1 url2 url3 -x
but this is not: npm run babel-node a.js parse url1 url2 url3 -x

here is my package.json file

{ "name": "commander_test", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "babel-node": "babel-node --presets=env", "a": "npm run babel-node a.js parse url1 url2 url3 -x", "b": "node b.js parse url1 url2 url3 -x ", "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC", "dependencies": { "commander": "^2.18.0" }, "devDependencies": { "babel-cli": "^6.26.0", "babel-core": "^6.26.3", "babel-preset-env": "^1.7.0", "babel-preset-es2015": "^6.24.1" } }

result of npm run a :

> [email protected] a D:\repositories\node\commander > npm run babel-node a.js parse url1 url2 url3 -x > [email protected] babel-node D:\repositories\node\commander > babel-node --presets=env "a.js" "parse" "url1" "url2" "url3" [ 'node', 'D:\\repositories\\node\\commander\\a.js', 'parse', 'url1', 'url2', 'url3' ] parse : url1 => undefined parse : url2 => undefined parse : url3 => undefined

result of npm run b

> [email protected] b D:\repositories\node\commander > node b.js parse url1 url2 url3 -x [ 'C:\\Program Files\\nodejs\\node.exe', 'D:\\repositories\\node\\commander\\b.js', 'parse', 'url1', 'url2', 'url3', '-x' ] parse : url1 => true parse : url2 => true parse : url3 => true

the 2 files a.js and b.js are the same . just a.js uses es6 modules and b.js Commonjs modules

 import program from "commander" // a.js let program = require("commander") // b.js //from here it's the exact same code console.log(process.argv) program .version('0.0.1') .command('parse <urls...> ') .option('-x, --opt', 'opt') .action( function (urls, cmd) { urls.forEach(url => { console.log(`parse : ${url} => ${cmd.opt}`) }); }) program.parse(process.argv)

Other users marked your question for low quality and need for improvement. I re-worded/formatted your input to make it easier to read/understand. Please review my changes to ensure they reflect your intentions. Feel free to drop me a comment in case you have further questions or feedback for me. — GhostCat
– GhostCat, Commented Sep 11, 2018 at 8:19

kas · Accepted Answer · 2018-09-10 15:32:25Z

i saw the anwser [https://github.com/babel/babel/issues/1730#issuecomment-111247861]

Thanks to Gajus here is the solution : he wrotes:

To avoid any confusion for those who stumble across this thread in the future, here is an example of how to use --:

babel-node --a -- ./foo --b In this case:

--a is an option that is passed to node (e.g. --debug or --throw-deprecation). --b is an option that is passed to the script, i.e., available under process.argv.

according to this solution i changed my scripts to :

 "scripts": { "a": "babel-node -- a.js parse url1 url2 url3 -x", "b": "node b.js parse url1 url2 url3 -x ", "test": "echo \"Error: no test specified\" && exit 1" }

and it worked !!

thanks

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