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NPM not running postinstall

I've installed a custom package called @company/cdk-library.

It has package.json scripts:

  "scripts": {
    "test": "jest",
    "build": "tsc",
    "prepublishOnly": "npx tsc --skipLibCheck",
    "installLambdas": "(cd constructs/account/mylambda/code/ && npm i)",
    "postinstall": "npm run installLambdas"
  },

When I install this package into my project using: npm i @mycompany/[email protected] --foreground-script

I don't get any indication that it's ran the postinstall script. If I check the directory, there's no dependencies there either.

Output from install:

➜  cdk git:(cdk-update) ✗ npm i @mycompany/[email protected] --foreground-scripts
npm WARN deprecated [email protected]: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated [email protected]: See https://github.com/lydell/source-map-url#deprecated
npm WARN deprecated [email protected]: See https://github.com/lydell/source-map-resolve#deprecated
npm WARN deprecated [email protected]: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated [email protected]: some dependency vulnerabilities fixed, support for node < 10 dropped, and newer ECMAScript syntax/features added

added 504 packages, and audited 523 packages in 16s

25 packages are looking for funding
  run `npm fund` for details

1 critical severity vulnerability

To address all issues, run:
  npm audit fix

Run `npm audit` for details.

However, if I do it manually by running cd node_modules/@mycompany/cdk-library && npm run postinstall

It runs it fine, output:

cdk-library git:(cdk-update) ✗ npm run postinstall                                                               

> @mycompany/[email protected] postinstall
> npm run installLambdas

npm WARN deprecated [email protected]: Critical security vulnerability fixed in v0.21.1. For more information, see https://github.com/axios/axios/pull/3410

added 82 packages, and audited 83 packages in 1s

...

Does anyone know why my postinstall isn't running when I install the package?

Solution

  • I know this has been here for a while, but I just ran into it myself and what I finally worked out, is that "postinstall" will only be callled with you actually using "npm install ..."

    If you happen to use the shortcut "npm i ..." it won't be called. You would need to add a script entry for "posti" in order to have it also work with the shortcut.

    Hope this helps others.