Use null delimiters in xargs to support space in file names

[pbsds]

Alternatively we could have xargs use newline instead of space as the delimiter, but fd will also ignore hidden files and respect .gitignore if it finds such further down.

[pbsds]

It seems fd only wants to list directories

[JumpIn-Git]

It seems fd only wants to list directories

what do you mean? if you want to use fd to format, you should do
fd -t f -e nix -x nixfmt
this should follow the gitignore

[pbsds]

These are the failing tests where I used fd '\.nix$ "$@" --type f - nixfmt':
https://buildbot.numtide.com/#/builders/519/builds/166

It doesn't like files in $@

[phaer]

Could you add a rationale for this change to the description, or ideally, the commit?

Is it to support file names with spaces? If so git ls-files -z for \0-terminated file names might be an even more robust alternative (see e.g. man page)

[JumpIn-Git]

These are the failing tests where I used fd '\.nix$ "$@" --type f - nixfmt': https://buildbot.numtide.com/#/builders/519/builds/166

It doesn't like files in $@

use fd -t f -e nix -x nixfmt -- "${@}"

[pbsds]

use fd -t f -e nix -x nixfmt -- "${@}"

That would run nixfmt on the files mentioned in "${@}" multiplied by the number of files that fd otherwise finds:

$ myfmt() { fd -t f -e nix -x echo nixfmt -- "${@}"; }
$ myfmt file-i-want-to-format.nix
nixfmt -- file-i-want-to-format.nix ./templates/nixos-and-darwin-shared-homes/modules/home/home-shared.nix
nixfmt -- file-i-want-to-format.nix ./templates/nixos-and-darwin-shared-homes/modules/nixos/host-shared.nix
nixfmt -- file-i-want-to-format.nix ./templates/nixos-and-darwin-shared-homes/hosts/my-darwin/users/me/home-configuration.nix
nixfmt -- file-i-want-to-format.nix ./templates/nixos-and-darwin-shared-homes/hosts/my-nixos/users/me/home-configuration.nix
nixfmt -- file-i-want-to-format.nix ./templates/nixos-and-darwin-shared-homes/hosts/my-darwin/darwin-configuration.nix
nixfmt -- file-i-want-to-format.nix ./templates/toml-devenvs/devshells/bye.nix
nixfmt -- file-i-want-to-format.nix ./templates/toml-devenvs/checks/default-devshell.nix
nixfmt -- file-i-want-to-format.nix ./templates/toml-devenvs/checks/bye-devshell.nix
nixfmt -- file-i-want-to-format.nix ./templates/system-manager/flake.nix
nixfmt -- file-i-want-to-format.nix ./templates/system-manager/hosts/myhost/system-configuration.nix
nixfmt -- file-i-want-to-format.nix ./templates/nixos-and-darwin-shared-homes/hosts/my-nixos/configuration.nix
nixfmt -- file-i-want-to-format.nix ./formatter.nix
nixfmt -- file-i-want-to-format.nix ./templates/nixos-and-darwin-shared-homes/flake.nix
nixfmt -- file-i-want-to-format.nix ./templates/toml-devenvs/flake.nix
nixfmt -- file-i-want-to-format.nix ./templates/default/devshell.nix
nixfmt -- file-i-want-to-format.nix ./lib/default.nix
nixfmt -- file-i-want-to-format.nix ./templates/toml-devenvs/packages/bye.nix
nixfmt -- file-i-want-to-format.nix ./templates/default/flake.nix
nixfmt -- file-i-want-to-format.nix ./packages/docs/default.nix
nixfmt -- file-i-want-to-format.nix ./flake.nix

[phaer]

Thanks 👍