failing to execute bundix due to bundler version read in Gemfile

[drzln]

Hello,

It would seem that bundix is unhappy with the bundler read in the Gemfile. My understanding is bundix should be an isolated binary with all its necessary dependencies with it.

Traceback (most recent call last):
        8: from /nix/store/fm8l4xxawiw08a9ylwgzkqc46whgh53d-bundix-2.5.1/bin/.bundix-wrapped:18:in `<main>'
        7: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems.rb:298:in `activate_bin_path'
        6: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems.rb:298:in `synchronize'
        5: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems.rb:299:in `block in activate_bin_path'
        4: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1372:in `activate'
        3: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1390:in `activate_dependencies'
        2: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1390:in `each'
        1: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1402:in `block in activate_dependencies'
/nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/dependency.rb:313:in `to_specs': Could not find 'bundler' (1.17.3) required by your /home/luis/code/tapresearch/raynor/Gemfile.lock. (Gem::MissingSpecVersionError)
To update to the latest version installed on your system, run `bundle update --bundler`.
To install the missing version, run `gem install bundler:1.17.3`
Checked in 'GEM_PATH=/nix/store/85p5si2a5amra5f3vbq6qjhsl127ck5i-bundler-2.3.9/lib/ruby/gems/2.7.0:/nix/store/fm8l4xxawiw08a9ylwgzkqc46whgh53d-bundix-2.5.1/lib/ruby/gems/2.7.0:/nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/gems/2.7.0' , execute `gem env` for more information
        8: from /nix/store/fm8l4xxawiw08a9ylwgzkqc46whgh53d-bundix-2.5.1/bin/.bundix-wrapped:18:in `<main>'
        7: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems.rb:298:in `activate_bin_path'
        6: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems.rb:298:in `synchronize'
        5: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems.rb:299:in `block in activate_bin_path'
        4: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1372:in `activate'
        3: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1390:in `activate_dependencies'
        2: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1390:in `each'
        1: from /nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1401:in `block in activate_dependencies'
/nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/2.7.0/rubygems/specification.rb:1404:in `rescue in block in activate_dependencies': Could not find 'bundler' (>= 1.11) among 57 total gem(s) (Gem::MissingSpecError)
Checked in 'GEM_PATH=/nix/store/85p5si2a5amra5f3vbq6qjhsl127ck5i-bundler-2.3.9/lib/ruby/gems/2.7.0:/nix/store/fm8l4xxawiw08a9ylwgzkqc46whgh53d-bundix-2.5.1/lib/ruby/gems/2.7.0:/nix/store/ki8kjxf7bnrykyv3jsr8g7cqm8sgc9b2-ruby-2.7.6/lib/ruby/gems/2.7.0' at: /nix/store/fm8l4xxawiw08a9ylwgzkqc46whgh53d-bundix-2.5.1/lib/ruby/gems/2.7.0/specifications/bundix-2.5.0.gemspec, execute `gem env` for more information
┌───────────────────>
│<rio>
│raynor
│on  nix_configuration
└─>✖  bundle --version
Bundler version 1.17.3```

Is there something I'm doing particularly wrong here?

[pfgray]

It looks like bundix pulls bundler from nixpkgs (https://github.com/nix-community/bundix/blob/master/default.nix#L23), which is currently v2.3.9.

If there's a way to override that, you might be able to replace that with bundler v1.17.3

[pfgray]

I was able to hack around this by checking out the bundix repo, replacing the bundler reference with an old version from nix, building it, and using the executable in my project.

Here's the changes I made to bundix:

diff --git a/default.nix b/default.nix
index f72ea93..6f664e9 100644
--- a/default.nix
+++ b/default.nix
@@ -1,10 +1,18 @@
 {
   pkgs ? (import <nixpkgs> {}),
-  ruby ? pkgs.ruby_2_6,
+  ruby ? pkgs.ruby_2_7,
   bundler ? (pkgs.bundler.override { inherit ruby; }),
   nix ? pkgs.nix,
   nix-prefetch-git ? pkgs.nix-prefetch-git,
 }:
+let
+  old_nixpkgs = import (
+    builtins.fetchTarball {
+      url = "https://github.com/nixos/nixpkgs/archive/96a1dbac972c4f67aea7ee548f4e5531003f8ab0.tar.gz";
+      sha256 = "0mx335ym9ai3ci3dgwszk289xjpvsqf6xx6g43250y5zwz9692mz";
+    }
+  ) {};
+in
 pkgs.stdenv.mkDerivation rec {
   version = "2.5.0";
   name = "bundix";
@@ -20,7 +28,7 @@ pkgs.stdenv.mkDerivation rec {
   '';

   nativeBuildInputs = [ pkgs.makeWrapper ];
-  buildInputs = [ ruby bundler ];
+  buildInputs = [ ruby old_nixpkgs.bundler ];

   meta = {
     inherit version;

and then after that, I ran nix-build ., and then I had a bundix executable in result/bin/bundix which had bundler v1.17.3.

You can check out the history of bundler on nixpkgs here to find other commit shas with different versions: https://github.com/NixOS/nixpkgs/commits/350fd0044447ae8712392c6b212a18bdf2433e71/pkgs/development/ruby-modules/bundler

Someone with more nix experience than me could probably come up with a better solution, maybe there's a way you can override bundix's bundler version from just a reference to the derivation?

[AndrewKvalheim]

In case it helps anyone, here’s how I did it:

let
  bundler_1_17_3 = (import (pkgs.fetchFromGitHub {
    owner = "NixOS";
    repo = "nixpkgs";
    rev = "fcc8660d359d2c582b0b148739a72cec476cfef5";
    hash = "sha256-eZhUhVwSWkLqhmbOoBDd26J42CeyhMcYxXRqjGuVXFs=";
  }) { }).bundler;

  bundix = pkgs.bundix.override {
    bundler = bundler_1_17_3.override {
      ruby = pkgs.ruby_2_7;
    };
  };
in
pkgs.mkShell {
  buildInputs = [ bundix ];
}

Nix Package Versions is useful for finding the old revision.