This is the master branch of nixpkgs, initially pulled from commit 8debf2f9a63d54ae4f28994290437ba54c681c7b
The intent of this repo is to be merged onto nixpkgs master. This will also be of help for https://git.suyu.dev/BoomMicrophone/suyu-nix-test
which I will need in order for development (it will also be helpful to know what to do for setting up the environment for the master server. Currently I am focusing on this so I can actually see what is still missing)
This repo will be removed once the PR to the nixpkgs github goes through
b6c06e216b
This improves our Bundler integration (i.e. `bundlerEnv`). Before describing the implementation differences, I'd like to point a breaking change: buildRubyGem now expects `gemName` and `version` as arguments, rather than a `name` attribute in the form of "<gem-name>-<version>". Now for the differences in implementation. The previous implementation installed all gems at once in a single derivation. This was made possible by using a set of monkey-patches to prevent Bundler from downloading gems impurely, and to help Bundler find and activate all required gems prior to installation. This had several downsides: * The patches were really hard to understand, and required subtle interaction with the rest of the build environment. * A single install failure would cause the entire derivation to fail. The new implementation takes a different approach: we install gems into separate derivations, and then present Bundler with a symlink forest thereof. This has a couple benefits over the existing approach: * Fewer patches are required, with less interplay with the rest of the build environment. * Changes to one gem no longer cause a rebuild of the entire dependency graph. * Builds take 20% less time (using gitlab as a reference). It's unfortunate that we still have to muck with Bundler's internals, though it's unavoidable with the way that Bundler is currently designed. There are a number improvements that could be made in Bundler that would simplify our packaging story: * Bundler requires all installed gems reside within the same prefix (GEM_HOME), unlike RubyGems which allows for multiple prefixes to be specified through GEM_PATH. It would be ideal if Bundler allowed for packages to be installed and sourced from multiple prefixes. * Bundler installs git sources very differently from how RubyGems installs gem packages, and, unlike RubyGems, it doesn't provide a public interface (CLI or programmatic) to guide the installation of a single gem. We are presented with the options of either reimplementing a considerable portion Bundler, or patch and use parts of its internals; I choose the latter. Ideally, there would be a way to install gems from git sources in a manner similar to how we drive `gem` to install gem packages. * When a bundled program is executed (via `bundle exec` or a binstub that does `require 'bundler/setup'`), the setup process reads the Gemfile.lock, activates the dependencies, re-serializes the lock file it read earlier, and then attempts to overwrite the Gemfile.lock if the contents aren't bit-identical. I think the reasoning is that by merely running an application with a newer version of Bundler, you'll automatically keep the Gemfile.lock up-to-date with any changes in the format. Unfortunately, that doesn't play well with any form of packaging, because bundler will immediately cause the application to abort when it attempts to write to the read-only Gemfile.lock in the store. We work around this by normalizing the Gemfile.lock with the version of Bundler that we'll use at runtime before we copy it into the store. This feels fragile, but it's the best we can do without changes upstream, or resorting to more delicate hacks. With all of the challenges in using Bundler, one might wonder why we can't just cut Bundler out of the picture and use RubyGems. After all, Nix provides most of the isolation that Bundler is used for anyway. The problem, however, is that almost every Rails application calls `Bundler::require` at startup (by way of the default project templates). Because bundler will then, by default, `require` each gem listed in the Gemfile, Rails applications are almost always written such that none of the source files explicitly require their dependencies. That leaves us with two options: support and use Bundler, or maintain massive patches for every Rails application that we package. Closes #8612 |
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| doc | ||
| lib | ||
| maintainers | ||
| nixos | ||
| pkgs | ||
| .gitignore | ||
| .mention-bot | ||
| .travis.yml | ||
| .version | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| default.nix | ||
| README.md | ||
Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:
% git remote add channels git://github.com/NixOS/nixpkgs-channels.git
For stability and maximum binary package support, it is recommended to maintain
custom changes on top of one of the channels, e.g. nixos-15.09 for the latest
release and nixos-unstable for the latest successful build of master:
% git remote update channels
% git rebase channels/nixos-15.09
For pull-requests, please rebase onto nixpkgs master.
NixOS linux distribution source code is located inside
nixos/ folder.
- NixOS installation instructions
- Documentation (Nix Expression Language chapter)
- Manual (How to write packages for Nix)
- Manual (NixOS)
- Nix Wiki
- Continuous package builds for unstable/master
- Continuous package builds for 15.09 release
- Tests for unstable/master
- Tests for 15.09 release
Communication: