NPM run script pass argument from one script to another

Question

This is my npm package.json scripts:

"scripts": {
  "method1": "./somScript $1",
  "method2": "webpack-dev-server",
  "runBoth": "npm run method1 $1 & npm run method2"
},

I want to be able to run npm run runBoth someArgument that would get passed to runBoth, and then to method1.

However, my code above does not work. Please advice!

Have you tried `--` between `runBoth` and `someArgument`? http://stackoverflow.com/a/14404223/6352710 — ahwayakchih, Jun 08 '16 at 23:26

Daniel Vukasovich · Accepted Answer · 2016-06-09T00:59:34.260

No, unfortunately it's not possible as NPM appends arguments.

You are executing: npm run method1 & npm run method2 "someArgument"

So, I guess your output is as follows:

[nodejs@mean test]$ npm run runBoth someArgument

> stackOverflow@0.0.1 runBoth /data/nodejs/node_projects/test
> npm run method1 $1 & npm run method2  "someArgument"


> stackOverflow@0.0.1 method1 /data/nodejs/node_projects/test
> ./somScript

[somScript] argument:

> stackOverflow@0.0.1 method2 /data/nodejs/node_projects/test
> ./script2.sh "someArgument"

now executing script2.sh using arg: someArgument
[nodejs@mean test]$

Also please note that arguments should be passed using "--" as follows:

[nodejs@mean test]$ npm run runBoth -- someArgument

> stackOverflow@0.0.1 runBoth /data/nodejs/node_projects/test
> npm run method1 $1 & npm run method2  "someArgument"


> stackOverflow@0.0.1 method1 /data/nodejs/node_projects/test
> ./somScript

[somScript] argument:

> stackOverflow@0.0.1 method2 /data/nodejs/node_projects/test
> ./script2.sh "someArgument"

now executing script2.sh using arg: someArgument
[nodejs@mean test]$

But in your case, the expected output will be the same.

My package.json:

  "scripts" : {
    "method1": "./somScript",
    "method2": "./script2.sh",
    "runBoth": "npm run method1 $1 & npm run method2 "
  }

You should try another implementation (as exporting/using environment variables, or others)

Here's a possible workaround:

package.json:

  "scripts" : {
    "method1": "./somScript",
    "method2": "./script2.sh",
    "runBoth": "npm run method1 $1 & npm run method2 ",
    "runBoth2": "./alternative.sh"
  }

Where runBoth2 executes "alternative.sh" as:

[nodejs@mean test]$ cat alternative.sh
npm run method1 $1 & npm run method2

And the expected output:

[nodejs@mean test]$ npm run runBoth2 -- someArgument

> stackOverflow@0.0.1 runBoth2 /data/nodejs/node_projects/test
> ./alternative.sh "someArgument"


> stackOverflow@0.0.1 method1 /data/nodejs/node_projects/test
> ./somScript "someArgument"

[somScript] argument: someArgument

> stackOverflow@0.0.1 method2 /data/nodejs/node_projects/test
> ./script2.sh

now executing script2.sh using arg:
[nodejs@mean test]$

Regards

NPM run script pass argument from one script to another

1 Answers1