yash: use less external commands in PS1

1 files changed, 44 insertions, 44 deletions

diff --git a/.yashrc b/.yashrc
index 4cf14c5..c83de3d 100644
--- a/.yashrc
+++ b/.yashrc
@@ -4,73 +4,73 @@ _ps1_prompt() {
 	CMD_DURATION=0
 	is_git=$(git rev-parse --is-inside-work-tree 2>/dev/null)
 
-	printf '\n\\foc.'
+	prompt="\n\\foc."
 	if [ "$is_git" ]; then
-		printf '%s' "$(git rev-parse --show-toplevel | awk -F/ '{ print $NF }')"
+		prompt="$prompt$(git rev-parse --show-toplevel | awk -F/ '{ print $NF }')"
 		git_path=$(git rev-parse --show-prefix)
 		git_path="${git_path%/}"
-		[ "$git_path" ] && printf '/%s' "$git_path"
+		prompt="$prompt${git_path:+"/$git_path"}"
+	elif [ "${PWD#"$HOME"}" != "$PWD" ]; then
+		prompt="$prompt~${PWD#"$HOME"}"
 	else
-		printf '%s' "$(pwd | sed "s#^$HOME#~#")"
+		prompt="$prompt$PWD"
 	fi
-	printf '\\fD.'
+	prompt="$prompt\\fD."
 
 	if [ "$is_git" ]; then
-		printf ' on \\fom. %s' "$(git branch --show-current)"
+		prompt="$prompt on \\fom. $(git branch --show-current)"
 
 		stat=
-		s=$(git status --porcelain -b)
-		echo "$s" | grep -q '^U[UDA]|^AA|^DD|^[DA]U'      && stat="$stat="
 		git rev-parse --verify refs/stash >/dev/null 2>&1 && stat="$stat\$"
-		echo "$s" | grep -q '^[MARCDU ]D|^D[ UM]'         && stat="$stat✘"
-		echo "$s" | grep -q '^R[ MD]'                     && stat="$stat»"
-		echo "$s" | grep -q '^[ MARC]M'                   && stat="$stat!"
-		echo "$s" | grep -q '^A[ MDAU]|^M[ MD]|^UA'       && stat="$stat+"
-		echo "$s" | grep -q '^\?\?'                       && stat="$stat?"
-
-		ahead=
-		behind=
-		echo "$s" | grep -q '^## [^ ]\+ .*ahead' && ahead=1
-		echo "$s" | grep -q '^## [^ ]\+ .*behind' && behind=1
-		if [ "$ahead" ] && [ "$behind" ]; then
-			stat="$stat⇕"
-		elif [ "$ahead" ]; then
-			stat="$stat⇡"
-		elif [ "$behind" ]; then
-			stat="$stat⇣"
-		fi
-
-		if [ "$stat" ]; then
-			printf '\\for. [%s]' "$stat"
-		fi
+		status="$(git status --porcelain -b)"
+		case "$status" in
+			U[UDA]*|AA*|DD*|[DA]U*)  stat="$stat=" ;;
+		esac
+		case "$status" in
+			[MARCDU\ ]D*|D[\ UM]*)   stat="$stat✘" ;;
+		esac
+		case "$status" in
+			R[\ MD]*)                stat="$stat»" ;;
+		esac
+		case "$status" in
+			[\ MARC]M*)              stat="$stat!" ;;
+		esac
+		case "$status" in
+			A[\ MDAU]*|M[\ MD]*|UA*) stat="$stat+" ;;
+		esac
+		case "$status" in
+			'??'*)                   stat="$stat?" ;;
+		esac
+		case "$status" in
+			'## '*ahead*behind*) stat="$stat⇕" ;;
+			'## '*ahead*) stat="$stat⇡" ;;
+			'## '*behind*) stat="$stat⇣" ;;
+		esac
+		prompt="$prompt${stat:+"\\for. [$stat]"}"
 	fi
 
 	if [ "$cmd_duration" -gt 1 ]; then
-		printf ' took\\foy.'
+		prompt="$prompt took\\foy."
 
 		secs=$((cmd_duration % 60))
 		mins=$((cmd_duration / 60 % 60))
 		hours=$((cmd_duration / 3600))
 
-		[ "$hours" -gt 0 ] && printf ' %dh' "$hours"
-		[ "$mins" -gt 0 ] && printf ' %dm' "$mins"
-		[ "$secs" -gt 0 ] && printf ' %ds' "$secs"
+		[ "$hours" -gt 0 ] && prompt="$prompt ${hours}h"
+		[ "$mins" -gt 0 ] && prompt="$prompt ${mins}m"
+		[ "$secs" -gt 0 ] && prompt="$prompt ${secs}s"
 	fi
-	printf '\\fD.\n'
+	prompt="$prompt\n"
 
 	n_jobs="$(jobs 2>/dev/null | wc -l)"
 	if [ "$n_jobs" -gt 0 ]; then
-		printf '\\fob.✦ '
-		[ "$n_jobs" -gt 1 ] && printf '%d ' "$n_jobs"
-		printf '\\fD.'
-	fi
-
-	if [ "$cmd_status" -eq 0 ]; then
-		printf '\\fg.'
-	else
-		printf '\\fr.'
+		[ "$n_jobs" -le 1 ] && n_jobs=
+		prompt="$prompt\\fob.✦ ${n_jobs:+"$n_jobs "}"
 	fi
-	printf '❯ \\fD.'
+	case "$cmd_status" in
+		0) printf '%s\\fg.❯ \\fD.' "$prompt" ;;
+		*) printf '%s\\fr.❯ \\fD.' "$prompt" ;;
+	esac
 }
 
 export PS1='$(_ps1_prompt)'