Move worktree names code to the main wt script

It is used in all completions. So, might as well move it into the main
script.

completions/_wt_completion

@@ -3,29 +3,20 @@
 # AUTOCOMPLETION FOR ZSH
 # Reference: https://zsh.sourceforge.io/Doc/Release/Completion-Widgets.html
 
-# `list` is populated with the names of all Git worktrees in the current directory.
-# git rev-parse --git-dir:                             Check if the current directory is a Git repository.
-# git worktree list --porcelain:                       List all worktrees in an easily parse-able way.
-# awk '/^worktree / { sub("worktree ", ""); print; }': Extract the worktree names and remove the `worktree ` prefix.
-# xargs -I{} basename {}:                              Get the base name of each worktree path, preserving whitespace.
-list="$(git rev-parse --git-dir &> /dev/null \
-	&& git worktree list --porcelain \
-	| awk '/^worktree / { sub("worktree ", ""); print; }' \
-	| xargs -I{} basename {})"
-
-# Split the output into an array, line-by-line.
-list=("${(@f)${list}}")
-
 # Declare an associative array named `opts`
 declare -A opts
 
+# Split the worktree names into an array, line-by-line.
+list=("${(@f)$(wt names)}")
+
 # Create associative array with key same as its value
 # Completion keywords are taken as keys of arrays and the possible matches are their values
 for item in $list; do
 	# Escape every element's special characters
 	item=$(printf '%q' "$item")
 	opts+=(["$item"]="$item")
 done
+
 # Add the keys of `opts` as completion options for the `wt` command.
 # `-Q` quotes the completion options.
 # `-a` specifies that the options are taken from an associative array.

completions/wt.fish

@@ -1,14 +1,4 @@
 # AUTOCOMPLETION FOR FISH
 # Reference: https://fishshell.com/docs/current/completions.html
 
-# if git rev-parse --git-dir &> /dev/null: Only check for completions if the user is in a git repository
-# git worktree list --porcelain: list all the available worktrees in a format that's easy to parse
-# | awk '/^worktree / { sub("worktree ", ""); print; }': grab only lines beginning with worktree and keep only their path
-# | xargs -I{} basename {}: get the basename of each worktree
-# separated by space
-
-function _wt_complete
-	git rev-parse --git-dir &> /dev/null && git worktree list --porcelain | awk '/^worktree / { sub("worktree ", ""); print; }' | xargs -I{} basename {}
-end
-
-complete -c wt -f -n '__fish_is_nth_token 1' -a "(_wt_complete)"
+complete -c wt -f -n '__fish_is_nth_token 1' -a "(wt names)"

completions/wt_completion

@@ -3,29 +3,20 @@
 # AUTOCOMPLETION FOR BASH
 # Reference: https://www.gnu.org/software/bash/manual/html_node/A-Programmable-Completion-Example.html
 
-# git rev-parse --git-dir &> /dev/null: check if the user is in a git repo
-# && git worktree list --porcelain: list all the available worktrees in a format that's easy to parse
-# | awk '/^worktree / { sub("worktree ", ""); print; }': grab only lines beginning with worktree and keep only their path
-# | xargs -I{} basename {}: get the basename of each worktree
-# separated by space
-
 _wt() {
     local cur
+	# The currently typed prefix to be completed
 	cur="${COMP_WORDS[COMP_CWORD]}"
 	COMPREPLY=()
 
     # Only show suggestions for the root command (wt)
     # Pass autocompletion suggestion as "words (-W)" to `compgen` separated by space
+	# Escape each suggestion special characters
     if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]]; then
-		local list suggestions
-
-		list=$(git rev-parse --git-dir &> /dev/null \
-			&& git worktree list --porcelain \
-			| awk '/^worktree / { sub("worktree ", ""); print; }' \
-			| xargs -I{} basename {})
-
+		# Use the newline as a separator for the suggestions
 		local IFS=$'\n'
-		suggestions=$(compgen -W "$list" -- "$cur")
+		local suggestions
+		suggestions=$(compgen -W "$(wt names)" -- "$cur")
 		for word in $suggestions; do
 			COMPREPLY+=("$(printf '%q' "$word")")
 		done

wt

@@ -20,11 +20,20 @@ worktree_list() {
 	git worktree list
 }
 
+worktree_list_names() {
+	if git rev-parse --git-dir &> /dev/null; then
+		git worktree list --porcelain \
+			| awk '/^worktree / { sub("worktree ", ""); print; }' \
+			| xargs -I{} basename {}
+	fi
+}
+
 help_message() {
 	echo -e "wt lets you switch between your git worktrees with speed.\n"
 	echo "Usage:"
 	echo -e "\twt <worktree-name>: search for worktree names and change to that directory."
 	echo -e "\twt list: list out all the git worktrees."
+	echo -e "\twt names: list out only the git worktree names."
 	echo -e "\twt update: update to the latest release of worktree switcher."
 	echo -e "\twt version: show the CLI version."
 	echo -e "\twt help: shows this help message."
@@ -83,6 +92,9 @@ if [ -z "${args[0]}" ]; then
 fi
 
 case "${args[0]}" in
+names)
+	worktree_list_names
+	;;
 list)
 	worktree_list
 	;;