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lix/src/nix/fmt.md
Qyriad 194ba8a02f docs: guide to installables docs in installable commands' docs 
The installables syntax is not documented in any of the man pages or
docbook pages for any of those individual commands. And while these
commands really should at least peripherally individually document how
installables work, in the meantime we can at least direct people to the
right place.

This commit also clarifies the unexpected fact that `nix profile remove`
and `nix profile upgrade` do *not* take installables.

Change-Id: I3b1453cb197a613bbab639c66a466365c3592c6d
2024-04-29 08:06:05 -06:00

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R""(

Note: this command's interface is based heavily around installables, which you may want to read about first (nix --help).

Examples

With nixpkgs-fmt:

# flake.nix
{
  outputs = { nixpkgs, self }: {
    formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixpkgs-fmt;
  };
}

  • Format the current flake: $ nix fmt

  • Format a specific folder or file: $ nix fmt ./folder ./file.nix

With nixfmt:

# flake.nix
{
  outputs = { nixpkgs, self }: {
    formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt;
  };
}
  • Format specific files: $ nix fmt ./file1.nix ./file2.nix

With Alejandra:

# flake.nix
{
  outputs = { nixpkgs, self }: {
    formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.alejandra;
  };
}

  • Format the current flake: $ nix fmt

  • Format a specific folder or file: $ nix fmt ./folder ./file.nix

Description

nix fmt will rewrite all Nix files (*.nix) to a canonical format using the formatter specified in your flake.

)""