zshrc: Add an option to get the old simple prompt

zshrc

@@ -9,6 +9,7 @@ local ls=""
 local ls_color="auto"
 local ls_on_cd="yes"
 local ls_on_init="no"
+local simple_prompt="no"
 
 bindkey -v
 # history-incremental-search-backward is much more useful than
@@ -67,22 +68,35 @@ case $TERM_PROGRAM in
 		;;
 esac
 
+if [ "$simple_prompt" = yes ]; then
 	set_prompt() {
-	PS1="%F{23}%m %F{29}%c$1%F{36}%(!.#.>)%f "
+		local branch
+		[ -n "$1" ] && branch="%F{black}%B(%b%F{cyan}$1%F{black}%B)%b%f"
+
+		PS1="%m:%c$branch%B%(!.#.$)%b "
 		PS2="%B>%b "
 		RPS1="%(1j.%F{yellow}%j%f.)%(?..%(1j. .)%F{red}%?%f)"
 		RPS2="%(1_.%F{black}%B(%_%)%b%f.)"
 	}
+else
+	set_prompt() {
+		local branch
+		[ -n "$1" ] && branch="%F{36}(%F{78}$1%F{36})"
+
+		PS1="%F{23}%m %F{29}%c$branch%F{36}%(!.#.>)%f "
+		PS2="%B>%b "
+		RPS1="%(1j.%F{yellow}%j%f.)%(?..%(1j. .)%F{red}%?%f)"
+		RPS2="%(1_.%F{black}%B(%_%)%b%f.)"
+	}
+fi
 set_prompt
 
 __precmd() {
 	__update_terminal_cwd
 
-	local branch_name=$(git symbolic-ref HEAD 2>/dev/null)
-	branch_name=${branch_name##refs/heads/}
-	if [ -n "$branch_name" -a "$branch_name" != master ]; then
-		local branch="%F{36}(%F{78}$branch_name%F{36})"
-	fi
+	local branch=$(git symbolic-ref HEAD 2>/dev/null)
+	branch=${branch##refs/heads/}
+	[ "$branch" = master ] && branch=""
 	set_prompt $branch
 }
 
@@ -201,5 +215,5 @@ alias pws="__pw -k ~/.cryptopassphrase-server.key"
 ixio() { curl -F 'f:1=<-' ix.io }
 0x0st() { curl -F'file=@-' https://0x0.st }
 
-unset fgrep grep grep_color ls ls_color ls_on_cd ls_on_init
+unset fgrep grep grep_color ls ls_color ls_on_cd ls_on_init simple_prompt
 unset HISTFILE