How to set shell for npm run-scripts in Windows

I'm running npm on Windows and would like to use & style parallel operations in run-scripts but running in parallel in cmd is kind of messy in my package.json file I'd like to write-

scripts: { "go": "cmd1 & cmd2"} 

but npm executes the script under cmd.exe which does not know about ; I could change this to scripts: { "go": "bats/bat1.bat") where bat1.bat is a cmd bat file that uses the windows style call or start commands to run commands in parallel. which works but gives me a script that only works on Windows.

It would be a lot simpler if I could get npm to run the script under a bash clone or cygwin.

I tried config: { "shell": "bash"} but that still ran cmd.exe

Is there any way to tell npm to run-scripts using a specific shell (not cmd.exe)?

Since npm 5.1

npm config set script-shell "C:\\Program Files (x86)\\git\\bin\\bash.exe"  

or (64bit installation)

npm config set script-shell "C:\\Program Files\\git\\bin\\bash.exe"

Note that you need to have git for windows installed.

You can revert it by running:

npm config delete script-shell

Here's one way to do it:

1. Create a script, such as my_script.sh, in your project bin directory.

2. In your package.json file, add a line to run the script using bash. For example:

   "scripts": {
     "boogie": "bash bin/my_script.sh"
   }
   

Now you can run your bash script from npm by:

    npm run-script boogie

Not very elegant, but it works.

If you are developing in both Windows and Linux/Unix, then at least this approach is fairly portable to both environments.

Ideally, overriding the npm shell config parameter should work, but npm (at least version 1.4.14) seems in Windows to ignore the setting and use cmd.exe instead.

Use the following command in your bash or Git Bash shell to find out the shell setting:

$ npm config ls -l | grep shell

By default, the output will be:

shell = "C:\\WINDOWS\\system32\\cmd.exe"

However, to override the default shell parameter, you can add (or edit) an npmrc file to the \Users\yourusername\AppData\Roaming\npm\etc directory. Just add the following line:

shell = "C:\\Program Files (x86)\\git\\bin\\bash.exe"

The path you use can be any valid path to bash.exe. Now, if you run the above "npm config ls -l | grep shell" command, you will see the following output, indicating that the shell parameter has been overriden:

shell = "C:\\Program Files (x86)\\git\\bin\\bash.exe"
; shell = "C:\\WINDOWS\\system32\\cmd.exe" (overridden)

One day, perhaps, a new version of npm will pay attention to the overridden shell parameter.

You can also use cross-platform powershell https://github.com/powershell/powershell#get-powershell for npm scripts.

To set for single project, run this from project root folder:

npm config set script-shell pwsh --userconfig ./.npmrc

To globally set for all node projects:

npm config set script-shell pwsh [--global]