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Jeremy Fleischman ba6b617e75
Add nix formatter build command 
`nix formatter build` is sort of like `nix build`: it builds, links, and
prints a path to the formatter program:

    $ nix formatter build
    /nix/store/cb9w44vkhk2x4adfxwgdkkf5gjmm856j-treefmt/bin/treefmt

Note that unlike `nix build`, this prints the full path to the program,
not just the store path (in the example above that would be
`/nix/store/cb9w44vkhk2x4adfxwgdkkf5gjmm856j-treefmt`).

Motivation
----------

I maintain a vim plugin that automatically runs `nix fmt` on files on
save. Since `nix fmt` can be quite slow due to nix evaluation, I choose
to cache the `nix fmt `entrypoint. This was very awkward to do, see the
implementation for details:
7864607231/lua/null-ls/builtins/formatting/nix_flake_fmt.lua (L83-L110).

I recently discovered that my implementation was buggy (it didn't handle
flakes that expose a `formatter` package, such as nixpkgs), so I had to
rework the implementation:
https://github.com/nvimtools/none-ls.nvim/pull/272.

With the new `nix formatter build` command, I can delete all this akward
code, and it will be easier for other folks to build performant editor
integrations for `nix fmt`.
2025-04-29 18:40:02 -07:00
.github build(deps): bump cachix/install-nix-action from 30 to 31 2025-03-10 22:58:40 +00:00
contrib function-trace: always show the trace 2019-09-18 23:23:21 +02:00
doc/manual doc/manual: Add language/evaluation 2025-04-25 18:06:03 +02:00
maintainers refactor: create a new nix formatter run command alias for nix fmt 2025-04-29 18:40:02 -07:00
misc Install init system configs only when relevant 2024-12-03 16:51:01 +01:00
nix-meson-build-support Add -Wundef to make #if FOO an error if not defined 2025-04-05 00:45:19 +02:00
packaging Fix pkgs.nixVersions and installTests 2025-04-20 22:20:52 +02:00
scripts Merge pull request #12423 from ilya-bobyr/fish-profile-local-state-bin-in-PATH 2025-04-18 07:27:04 +02:00
src Add nix formatter build command 2025-04-29 18:40:02 -07:00
tests Add nix formatter build command 2025-04-29 18:40:02 -07:00
.clang-format Factor out lookupExecutable and other PATH improvments 2024-08-07 18:12:58 -04:00
.clang-tidy Add .clang-tidy 2024-02-01 01:01:39 +01:00
.dir-locals.el .dir-locals.el: Set c-block-comment-prefix 2020-07-10 11:21:06 +02:00
.editorconfig No global eval settings in libnixexpr 2024-06-24 12:15:16 -04:00
.gitignore Expand manual on derivation outputs 2025-02-27 02:13:36 -05:00
.mergify.yml .mergify.yml: Add backport 2.28-maintenance entry 2025-03-31 12:15:28 -04:00
.shellcheckrc housekeeping: shellcheck for tests/functional/ca/build-cache.sh 2024-06-12 17:41:16 -04:00
.version Bump version 2025-04-01 14:26:00 -04:00
CITATION.cff chore: PhD thesis as reference in CITATION.cff 2024-05-18 20:05:22 +02:00
CONTRIBUTING.md Rename doc/manual{src -> source} 2024-10-14 11:21:24 -04:00
COPYING * Change this to LGPL to keep the government happy. 2006-04-25 16:41:06 +00:00
default.nix Format .nix files 2025-01-24 17:04:02 +01:00
docker.nix Format .nix files 2025-01-24 17:04:02 +01:00
flake.lock flake.lock: Update 2025-04-24 13:43:53 -04:00
flake.nix Explain the use of "2" in the overlay 2025-04-20 17:20:54 -04:00
HACKING.md Rename doc/manual{src -> source} 2024-10-14 11:21:24 -04:00
meson.build Fix meson warning about meson_version 1.1 2025-04-09 15:31:34 +02:00
meson.options Don't build the API docs in the devshell 2024-11-12 20:18:33 +01:00
precompiled-headers.h Build a minimized Nix with MinGW 2024-04-17 12:26:10 -04:00
README.md README: update CI badge 2024-08-22 23:16:14 +08:00
shell.nix Remove url literals 2022-01-24 13:28:21 +01:00

README.md

Nix

Open Collective supporters CI

Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.

Installation and first steps

Visit nix.dev for installation instructions and beginner tutorials.

Full reference documentation can be found in the Nix manual.

Building and developing

Follow instructions in the Nix reference manual to set up a development environment and build Nix from source.

Contributing

Check the contributing guide if you want to get involved with developing Nix.

Additional resources

Nix was created by Eelco Dolstra and developed as the subject of his PhD thesis The Purely Functional Software Deployment Model, published 2006. Today, a world-wide developer community contributes to Nix and the ecosystem that has grown around it.

License

Nix is released under the LGPL v2.1.