Install generator ignores --package-manager option in several places

[gordysc]

Description

I setup my Rails project with bun, but when running the install generator with --package-manager=bun (or yarn/pnpm), it looks like the generator still uses hardcoded npm commands in several places, causing errors like sh: 1: npm: not found when npm is not installed.

Steps to Reproduce

1. Install the gem in a Rails project with --javascript=bun
2. Run bin/rails generate inertia:install --package-manager=bun
3. User sees a npm: not found error

Affected Code Locations

lib/generators/inertia/install/install_generator.rb

1. Lines 131-133: TypeScript check scripts use npm pkg set

   run 'npm pkg set scripts.check="..."' if svelte?
   run 'npm pkg set scripts.check="..."' if framework == 'vue'
   run 'npm pkg set scripts.check="..."' if framework == 'react'

2. Line 266: Version resolution uses npm show
   npm show @inertiajs/core@#{options[:inertia_version]} version --json | tail -n2 | head -n1 | tr -d '", '.strip

I think 2 is where my current error is coming from, but 1 might be worth checking as well.

[yogeshjain999]

I'm facing same issue and getting an error while running inertia:scaffold due to npm reference.

inertia-rails/lib/inertia_rails/generators/helper.rb

Line 93 in 253acc1

JSON.parse(`npm ls @inertiajs/core --json`).then do |json|