Packaging/Ruby: Difference between revisions

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See [https://nixos.org/manual/nixpkgs/stable/#packaging-applications Packaging Ruby programs] in the nixpkgs manual
Ruby projects are generally packaged with [https://github.com/manveru/bundix bundix]. This guide will show how to package a ruby project
Ruby projects are generally packaged with [https://github.com/manveru/bundix bundix]. This guide will show how to package a ruby project
See


== Building '''BeEF''' ==
== Building '''BeEF''' ==
Line 20: Line 26:
     libxml2
     libxml2
     libxslt
     libxslt
     pkgconfig
     pkg-config
     bundix
     bundix
     gnumake
     gnumake
Line 56: Line 62:
     cat > $bin <<EOF
     cat > $bin <<EOF
#!/bin/sh -e
#!/bin/sh -e
exec ${gems}/bin/bundle exec ${ruby}/bin/ruby $i "\$@"
exec ${gems}/bin/bundle exec ${ruby}/bin/ruby $out/share/beef/beef "\$@"
EOF
EOF
     chmod +x $bin
     chmod +x $bin
Line 110: Line 116:
</syntaxHighlight>
</syntaxHighlight>


=== Using Bundler 2 ===
=== set the local gemConfig ===
'''TODO''': also merge with the <code>defaultGemConfig</code> somehow
 
== Using Bundler 2 ==


Bundler 2 comes included with Ruby, so instead of importing <code>ruby.devEnv</code> import Ruby and Bundix separately.
Bundler 2 comes included with Ruby, so instead of importing <code>ruby.devEnv</code> import Ruby and Bundix separately.


=== set the local gemConfig ===
 
'''TODO''': also merge with the <code>defaultGemConfig</code> somehow
[[Category:Development]]
[[Category:Languages]]

Latest revision as of 20:36, 25 June 2024

See Packaging Ruby programs in the nixpkgs manual


Ruby projects are generally packaged with bundix. This guide will show how to package a ruby project

See


Building BeEF

$ git clone https://github.com/beefproject/beef/

Create shell.nix with all dependencies

we create a shell.nix in the project directory:

with import <nixpkgs> {};
stdenv.mkDerivation {
  name = "env";
  buildInputs = [
    ruby.devEnv
    git
    sqlite
    libpcap
    postgresql
    libxml2
    libxslt
    pkg-config
    bundix
    gnumake
  ];
}

Build Gemfile.lock and gemset.nix

$ nix-shell
$ bundle install      # generates Gemfile.lock
$ bundix              # generates gemset.nix

Build default.nix

This will be the package configuration:

{ stdenv, bundlerEnv, ruby }:
let
  # the magic which will include gemset.nix
  gems = bundlerEnv {
    name = "beef-env";
    inherit ruby;
    gemdir  = ./.;
  };
in stdenv.mkDerivation {
  name = "beef";
  src = ./.;
  buildInputs = [gems ruby];
  installPhase = ''
    mkdir -p $out/{bin,share/beef}
    cp -r * $out/share/beef
    bin=$out/bin/beef
# we are using bundle exec to start in the bundled environment
    cat > $bin <<EOF
#!/bin/sh -e
exec ${gems}/bin/bundle exec ${ruby}/bin/ruby $out/share/beef/beef "\$@"
EOF
    chmod +x $bin
  '';
}

Build the package

$ nix-build -E '((import <nixpkgs> {}).callPackage (import ./default.nix) { })' --keep-failed
....
do_sqlite3 build FAILED!

Our Problem is that do_sqlite3 wants to build native extensions and requires sqlite as dependency. There are two ways to solve this issue:

  1. add a global override to your nixpkgs
  2. set the gemConfig for the bundleEnv manually

Adding a global override for a gem

We edit: <nixpkgs/pkgs/development/ruby-modules/gem-config/default.nix:

{
   ...
   do_sqlite3 = attrs: {
     buildInputs = [ sqlite ];
   };
   ...
}


After this change we build the package again.

Defining groups

Sophisticated applications use groups to organize their gems like development, test and production. bundlerEnv only makes the default group available in the environment, that is all gems which are not in a group. To make other groups available, they need to be provided as an array. Don't forget to include the default group.

Example:

  gems = pkgs.bundlerEnv {
    name = "exampleApp";
    inherit ruby;
    gemfile = ./Gemfile;
    lockfile = ./Gemfile.lock;
    gemset = ./gemset.nix;
    groups = [ "default" "production" "development" "test" ];
  };

set the local gemConfig

TODO: also merge with the defaultGemConfig somehow

Using Bundler 2

Bundler 2 comes included with Ruby, so instead of importing ruby.devEnv import Ruby and Bundix separately.