使用 npm 在多个节点项目目录中运行脚本

Question

The Context

I have one main project which has multiple node projects inside that as subdirectories. each one with their own node_modules directories and package.json files. I want to have an npm script defined in my main package.json files which runs npm scripts from each of those projects concurrently.

The Code

My directory structure is like this:

main:
  ...
  package.json

  - sub-project-1
    - ...
      package.json
  - sub-project-2
    ...
    package.json

Sub-project-1/package.json:

...
"scripts": {
  "start": "node run foo.js"
}

Sub-project-2/package.json:

...
"scripts": {
  "start": "node run bar.js"
}

Main package.json:

...
"scripts": {
  "start": "/* Here I want to do something like npm sub-project-1/ start && npm sub-project-2/ start */
}

Now, obviously I could copy and paste the commands in sub-project-1/package.json 's start script and sub-project-2/package.json 's start script into a bash script and run that instead. But I want to be able to change those npm start scripts without having to manually change the bash script every time. Is there a way to do this?

Answer 1

1.You can also write a python script that parses all the package.jsons of the subdirectories and then generate the master package.json file

2.or You can also write a python script that parses all the package.jsons of the subdirectories and then generate a shellscript where the mater package.json will call it in the "start".

Answer 2

The following is not concurrent; however, you can change the npm start scripts with this approach.

I should mention also that it's not the world's most scalable approach. But it's simple, so I thought it might be helpful to share.

Here goes ...

Main package.json:

...
"scripts": {
  "start": "cd Sub-project-1 && npm run start && cd ../Sub-project-2 && npm run start && cd ../ && <parent project start script here>"
}

With this script, you're just meandering through the sub projects and then coming back up to run the parent project's script.