bower2nix

bower2nix

Generate nix expressions to fetch bower dependencies.

Usage

usage: bower2nix [-h] [-v] [INPUT] [OUTPUT]

Generate nix expressions to fetch bower dependencies

Positional arguments:
  INPUT          The bower.json file (default: ./bower.json)
  OUTPUT         The output file to generate (default: stdout)

Optional arguments:
  -h, --help     Show this help message and exit.
  -v, --version  Show program's version number and exit.

Installing

The easiest way to install bower2nix is not to install it at all. Just start a nix-shell:

nix-shell -p nodePackages.bower2nix

Example

If you have a bower.json file like this:

{
  "name": "bower-test",
  "dependencies": {
    "angular": "~1.4.0"
  }
}

Then running bower2nix bower.json bower-generated.nix will generate something like this:

# bower-generated.nix
{ fetchbower, buildEnv }:
buildEnv { name = "bower-env"; ignoreCollisions = true; paths = [
  (fetchbower "angular" "1.4.9" "~1.4.0" "0a2754zsxv9dngpg08gkr9fdwv75y986av12q4drf1sm8p8cj6bs")
]; }

The resulting derivation is a union of all the downloaded bower packages (and their dependencies).

How to use in your project

Usually, you want a bower_components directory. This can be generated with bower install by pointing it at the environment of downloaded bower packages.

  bowerComponents = pkgs.buildBowerComponents {
    name = "bower-test";
    generated = ./bower-generated.nix;
    src = mySources;
  };

The resulting derivation contains a bower_components directory which is ready to use in your project's build process.

There is a small example within the example subdirectory of this repo.

For more information, see the Nixpkgs manual.

Fetch Bower

For testing purposes, a single package can be downloaded. For example: fetch-bower angular '~1.4.0' '1.4.8'. If no output directory is provided, the package attributes will be shown, and the package contents discarded.

usage: fetch-bower [-h] [-v] [--out DIR] NAME [TARGET] [VERSION]

Fetch a single bower dependency

Positional arguments:
  NAME               Package name
  TARGET             Target version range
  VERSION            Exact package version

Optional arguments:
  -h, --help         Show this help message and exit.
  -v, --version      Show program's version number and exit.
  --out DIR, -o DIR  Output directory

Requirements

bower2nix requires Node.js 4.x or higher. The latest version of bower2nix is in the 16.09 release of nixpkgs/NixOS, so use that.

Authors

• Shea Levy @shlevy
• Rodney Lorrimar @rvl