clj2nix

installation

(Change rev and sha256 according to nix-prefetch-github hlolli clj2nix)

let
  clj2nix = pkgs.callPackage (pkgs.fetchFromGitHub {
    owner = "hlolli";
    repo = "clj2nix";
    rev = "b9a28d4a920d5d680439b1b0d18a1b2c56d52b04";
    sha256 = "0d8xlja62igwg757lab9ablz1nji8cp9p9x3j0ihqvp1y48w2as3";
  }) {};

usage

After the installation you should have clj2nix on your path, which takes two arguments, the depn.edn file for the project's dependencies, and the output file.

Example:

$ clj2nix ./deps.edn ./deps.nix [options]

With an imported deps.nix you can use it to fetch the dependencies trough nix. The set has two helper functions that can do this for you; makeClasspaths {} and makePaths {}.

{ stdenv, pkgs, clojure }:

let cljdeps = import ./deps.nix { inherit pkgs; };
    classp  = cljsdeps.makeClasspaths {};

in stdenv.mkDerivation {
  ...whatever here...

  installPhase = ''
      clojure -i somefile.clj -Scp ${classp}
  '';
}

makeClasspaths (colon seperated classpaths)

# example
let cljdeps = import ./deps.nix { inherit pkgs; };
    classp  = cljsdeps.makeClasspaths {};

....
echo ${classp}

prints:
/nix/store/9zp8rpnhpmx9i1g7vnicq6hiz11yknqi-clj-time_clj-time-0.14.2.jar:/nix/store/n7fmadn560r77qw34814a97j408n0vd6-data.csv:/nix/store/sch7dhx6f6mhfx33nvl964qfdr8ivn2x-joda-time_joda-time-2.9.7.jar

with the optional parameter extraClasspaths

# example
let cljdeps = import ./deps.nix { inherit pkgs; };
    classp  = cljsdeps.makeClasspaths {extraClasspaths="./local/file.jar"};

....
echo ${classp}

prints:
/nix/store/9zp8rpnhpmx9i1g7vnicq6hiz11yknqi-clj-time_clj-time-0.14.2.jar:/nix/store/n7fmadn560r77qw34814a97j408n0vd6-data.csv:/nix/store/sch7dhx6f6mhfx33nvl964qfdr8ivn2x-joda-time_joda-time-2.9.7.jar:./local/file.jar

makePaths

# example
let cljdeps = import ./deps.nix { inherit pkgs; };
    classp  = cljsdeps.makePaths {};

....
echo ${builtins.toString classp}

prints (square brackets added for demonstrations):
[
  /nix/store/9zp8rpnhpmx9i1g7vnicq6hiz11yknqi-clj-time_clj-time-0.14.2.jar
  /nix/store/n7fmadn560r77qw34814a97j408n0vd6-data.csv
  /nix/store/sch7dhx6f6mhfx33nvl964qfdr8ivn2x-joda-time_joda-time-2.9.7.jar
]

options

It's possible to add the extra dependencies form aliases into the nix file by adding one or more -Aalias to the end of the command. Example

clj2nix ./deps.edn ./deps.nix -A:test -A:ci

glittershark / clj2nix