nixos-config/home-manager/modules/fish/functions.nix

{ git, coreutils }: {
  mark_prompt_start = {
    onEvent = "fish_prompt";
    body = ''
      ${coreutils}/bin/echo -en "\e]133;A\e\\"
    '';
  };
  reload = {
    body = ''
      history --save
      set -gx dirprev $dirprev
      set -gx dirnext $dirnext
      set -gx dirstack $dirstack
      set -g fish_greeting ""
      exec fish
    '';
    description = "Reload Fish while keeping some context";
  };
  update-env = {
    body = ''
      set -gx SWAYSOCK /run/user/(id -u)/sway-ipc.(id -u).(pgrep -x sway).sock
    '';
    description = "Update environment variables";
  };
  clangfmt = {
    body = ''
      set source_exts "h" "hpp" "c" "cpp" "cc" "cp" "c++" "cxx" "cu" "proto"
      set files (${git}/bin/git diff --diff-filter=ACMR --name-only $argv[1])
      set repo_path (realpath --relative-to=$PWD (${git}/bin/git rev-parse --show-toplevel))
      set clangformat (${git}/bin/git config --get clangFormat.binary)
      ${coreutils}/bin/echo "Formatting files in $repo_path with $clangformat"

      for f in $files
        set file (realpath $repo_path/$f)
        ${coreutils}/bin/echo "Processing $file"

        set ext (string match -r ".*\.([^\.]+)\$" $file)[2]

        if contains $ext $source_exts
          ${coreutils}/bin/echo "Formatting $file"
          $clangformat -i -style=file $file
        else
          ${coreutils}/bin/echo "Extension $ext not found in $source_exts"
        end
      end
    '';
    description = "Use clang-format to format all changed and added files";
  };

  linklib = {
    body = ''
      function linklib --argument lib
        set libcomponents (string split "." "$lib")
        set libname $libcomponents[1].$libcomponents[2]
        set libmajor $libname.$libcomponents[3]

        if test -f $libname -o -L $libname
          ${coreutils}/bin/echo "$libname already exists"
          return 1
        end

        if test -f $libmajor -o -L $libmajor
          ${coreutils}/bin/echo "$libmajor already exists"
          return 2
        end

        ${coreutils}/bin/ln -s $lib $libmajor
        ${coreutils}/bin/ln -s $libmajor $libname
      end
    '';
  };
}