~/.zshrc: Display cmd runtime and improve cmd escaping

.bin/Makefile

all: rn timely up ydl
all: rn since timely up ydl
rn: rn.go
	go build $<
since: since.go
	go build $<
timely: timely.go
	go build timely.go

.bin/since.go

package main
import (
	"fmt"
	"os"
	"time"
)
func main() {
	last := os.Args[1]
	t, err := time.Parse(time.RFC3339Nano, last)
	if err != nil {
		return
	}
	fmt.Printf("(%s) ", time.Since(t))
}

.zshrc

	fi
}
__last_cmd_time=""
autoload colors && colors
function precmd {
	echo -ne "\033]0;\007"
	user="%{$fg[red]%}%n%{$reset_color%}"
	dir="%{$fg[cyan]%}%~%{$reset_color%}"
	lastcmd="$history[$(($HISTCMD-1))]"
	lastcmd_witherror="%(?!$lastcmd!%B$lastcmd%b)"
	duration=$(since "$__last_cmd_time")
	# store last cmd in psvar[1] (magically avoids escaping problems?)
	psvar[1]="$history[$(($HISTCMD-1))]"
	if [ -n "$SSH_CONNECTION" ]; then
		server="@`echo $SSH_CONNECTION | cut -d' ' -f3`"
	fi
	PROMPT="$user$server in $dir@$(repo_branch) $lastcmd_witherror
	PROMPT="$user$server in $dir@$(repo_branch) $duration%(?.%1v.%B%1v%b)
$(repo_char) $ "
	RPROMPT="%D{%Y-%m-%d} %{$fg[red]%}%t%{$reset_color%}"
	#RPROMPT="%D{%Y-%m-%d} %{$fg[red]%}%t%{$reset_color%}"
	__last_cmd_time=$(date +%Y-%m-%dT%H:%M:%S.%N%:z)
}
function preexec {
	__last_cmd_time=$(date +%Y-%m-%dT%H:%M:%S.%N%:z)
}
bindkey -e