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docs/javascript/buildNpmPackage: Document bin, man and npm pack behavior

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Doron Behar 2023-10-02 17:07:31 +03:00
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doc/languages-frameworks/javascript.section.md
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@ -161,6 +161,8 @@ git config --global url."https://github.com/".insteadOf git://github.com/
`buildNpmPackage` allows you to package npm-based projects in Nixpkgs without the use of an auto-generated dependencies file (as used in [node2nix](#javascript-node2nix)). It works by utilizing npm's cache functionality -- creating a reproducible cache that contains the dependencies of a project, and pointing npm to it.
Here's an example:
```nix
{ lib, buildNpmPackage, fetchFromGitHub }:
@ -191,6 +193,8 @@ buildNpmPackage rec {
}
```
In the default `installPhase` set by `buildNpmPackage`, it uses `npm pack --json --dry-run` to decide what files to install in `$out/lib/node_modules/$name/`, where `$name` is the `name` string defined in the package's `package.json`. Additionally, the `bin` and `man` keys in the source's `package.json` are used to decide what binaries and manpages are supposed to be installed. If these are not defined, `npm pack` may miss some files, and no binaries will be produced.
#### Arguments {#javascript-buildNpmPackage-arguments}
* `npmDepsHash`: The output hash of the dependencies for this project. Can be calculated in advance with [`prefetch-npm-deps`](#javascript-buildNpmPackage-prefetch-npm-deps).