feat: add fzf functions to interact with git worktrees

These have to be functions sadly because `cd` doesn't work otherwise.
This just means there is more reason to have subcommand aliases on a shell level. :)

Heavily based on nerdypeppers stuff[https://peppe.rs/posts/curing_a_case_of_git-UX/].

users/buffet/bash.nix

@@ -42,6 +42,54 @@ in {
         '';
 
         initExtra = ''
+          gwa() {
+              [[ "$1" ]] || {
+                  echo "required branch name argument" >&2
+                  return 1
+              }
+
+              local repo="''${PWD##*/}"
+              local uuid="$(< /proc/sys/kernel/random/uuid)"
+              local basepath="$HOME/worktrees"
+              local path="$basepath/$repo-$uuid"
+
+              mkdir -p "$basepath"
+              git worktree add "$path" -b "$1" && cd "$path"
+          }
+
+          gwd() {
+              local res="$(
+                  set -o pipefail
+                  git worktree list | \
+                  ${pkgs.fzf}/bin/fzf --preview 'git log --color --decorate --oneline' \
+                      --preview-window=up \
+                      --cycle \
+                      --query "$1" |\
+                  cut -d' ' -f1
+              )"
+
+              [[ $? -eq 0 ]] && echo "$res" && git worktree remove "$res"
+          }
+
+          gwg() {
+              local res="$(
+                  set -o pipefail
+
+                  local trees="$(git worktree list | ${pkgs.fzf}/bin/fzf --filter "$1" --no-sort)"
+                  if [[ "$(wc -l <<<"$trees")" -eq 1 ]]; then
+                      printf '%s\n' "$trees"
+                  else
+                      printf '%s\n' "$trees" | \
+                      ${pkgs.fzf}/bin/fzf --preview='git log --color --decorate --oneline' \
+                          --preview-window=up \
+                          --cycle \
+                          --query "$1"
+                  fi | cut -d' ' -f1
+              )"
+
+              [[ $? -eq 0 ]] && echo "$res" && cd "$res"
+          }
+
           __prompt() {
           	local status="$?"
           	local row