[rush] postinstall config is not getting executed by default on "rush install/rush update"

[Sukesh-Gundoji]

Please prefix the issue title with the project name i.e. [rush], [api-extractor] etc.

Is this a feature or a bug?

• Feature
• Bug

Please describe the actual behavior.
Need help: we are having a monorepo which contains multiple angular projects(libraries). Recently, we upgraded to angular V9. During this phase we explored that our library node_modules needs to be Angular Ivy compatible for which we have to make sure running "ngcc" after any change in node_module installation in each individual project/library.

In npm/yarn scenario we can use "postinstall" option which is available in package.json.

Is there a way we can achieve the same in Rush ? and also, will "postRushInstall" option can be of any help ? if so, can you please provide an example for the same ?

If the issue is a bug, how can we reproduce it? Please provide detailed steps and include a GitHub branch if applicable. Your issue will get resolved faster if you can make it easy to investigate.

What is the expected behavior?

If this is a bug, please provide the tool version, Node.js version, and OS.

• Tool:
• Tool Version:
• Node Version:
  • Is this a LTS version?
  • Have you tested on a LTS version?
• OS:

[iclanton]

I'm not very familiar with Angular. Can you share a repro?

[Sukesh-Gundoji]

Sorry for delay in response. I am trying to get a simple repro scenario out of my current application(which is a bit difficult...trying). meanwhile I just want to check a simple thing. as part of "rush update/rush install" command will it run package.json's "postinstall" config(which happens default in yarn/npm ?

[octogonz]

meanwhile I just want to check a simple thing. as part of "rush update/rush install" command will it run package.json's "postinstall" config(which happens default in yarn/npm ?

rush install will run the postinstall scripts for external dependencies. It will NOT run postinstall scripts found in the package.json for a local project, because those projects are locally linked rather than being "installed."

The postRushInstall script runs once for the entire monorepo, after rush install is finished.

[yume-chan]

Related to #862

[yume-chan]

Didn't realize that when "useWorkspaces": true is used, postinstall scripts run automatically after each rush install/update.

With "useWorkspaces": false, rush collects dependencies from all projects, to generate a new package.json to be used pnpm install. Now with "useWorkspaces": true, rush calls pnpm install --recursive, which uses each package.json directly, thus also runs postinstall scripts.