51 lines
2.1 KiB
Markdown
51 lines
2.1 KiB
Markdown
Node.js packages
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================
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The `pkgs/development/node-packages` folder contains a generated collection of
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[NPM packages](https://npmjs.com/) that can be installed with the Nix package
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manager.
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As a rule of thumb, the package set should only provide *end user* software
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packages, such as command-line utilities. Libraries should only be added to the
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package set if there is a non-NPM package that requires it.
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When it is desired to use NPM libraries in a development project, use the
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`node2nix` generator directly on the `package.json` configuration file of the
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project.
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The package set also provides support for multiple Node.js versions. The policy
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is that a new package should be added to the collection for the latest stable LTS
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release (which is currently 6.x), unless there is an explicit reason to support
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a different release.
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If your package uses native addons, you need to examine what kind of native
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build system it uses. Here are some examples:
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* `node-gyp`
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* `node-gyp-builder`
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* `node-pre-gyp`
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After you have identified the correct system, you need to override your package
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expression while adding in build system as a build input. For example, `dat`
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requires `node-gyp-build`, so we override its expression in `default-v6.nix`:
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```nix
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dat = nodePackages.dat.override (oldAttrs: {
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buildInputs = oldAttrs.buildInputs ++ [ nodePackages.node-gyp-build ];
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});
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```
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To add a package from NPM to nixpkgs:
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1. Modify `pkgs/development/node-packages/node-packages-v6.json` to add, update
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or remove package entries. (Or `pkgs/development/node-packages/node-packages-v4.json`
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for packages depending on Node.js 4.x)
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2. Run the script: `(cd pkgs/development/node-packages && ./generate.sh)`.
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3. Build your new package to test your changes:
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`cd /path/to/nixpkgs && nix-build -A nodePackages.<new-or-updated-package>`.
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To build against a specific Node.js version (e.g. 4.x):
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`nix-build -A nodePackages_4_x.<new-or-updated-package>`
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4. Add and commit all modified and generated files.
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For more information about the generation process, consult the
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[README.md](https://github.com/svanderburg/node2nix) file of the `node2nix`
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tool.
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