nix/doc/manual/rl-next/nix-formatter.md

synopsis	issues	prs
Add `nix formatter build` and `nix formatter run` commands		13063

nix formatter run is an alias for nix fmt. Nothing new there.

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).