shake

commit 7f3edf3c9045ef41046eeefd4f6094a56a801c91
parent abf6473eed93f6f533a5e2b7d9a5eda5cf5a30be
Author: Jul <jul@9o.is>
Date:   Tue, 17 Mar 2026 00:06:59 +0800

add optional flag parsing to rule command

Diffstat:
M
shake
 | 
68
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----

1 file changed, 64 insertions(+), 4 deletions(-)
diff --git a/shake b/shake
@@ -252,18 +252,78 @@ build() {
 	printf '\n' >&3
 }
 
+_shake_requires_arg() {
+	case "$2" in
+	*"$1:"*) return 0;;
+	*) return 1;;
+	esac
+}
+
+_shake_parse_args() {
+	_optstring="$1"
+	shift
+
+	_opts=
+	_deps=
+	_optshift=0
+	_optcnt=$#
+
+	while [ $# -gt 0 ]; do
+		case "$1" in
+		-*)
+			_optflag="${1#-}"
+			if _shake_requires_arg "$_optflag" "$_optstring"; then
+				_optval="$2"
+				case "$_optval" in
+				\$*dir/*)
+					if [ -z "$_deps" ]; then
+						_deps='-'
+					fi
+					_deps="$_deps $_optval"
+					;;
+				esac
+				shift 2
+			else
+				_optval=
+				shift 1
+			fi
+			[ -n "$_optval" ] && _opts="$_opts -$_optflag $_optval" || _opts="$_opts -$_optflag"
+			;;
+		*)
+			break
+			;;
+		esac
+	done
+
+	_optrem=$#
+	_optshift=$(( _optcnt - _optrem ))
+}
+
 rule() {
-	printf 'rule %s\n' "$1" >&3
-	bind command "${*:2}"
+	_r=$1
+	shift
+	printf 'rule %s\n' "$_r" >&3
+
+	_optstring=
+	if [ "$1" == '-o' ]; then
+		_optstring="$2"
+		shift 2
+	fi
+
+	bind command "$*"
 
 	_d=
-	for _v in ${*:2}; do
+	for _v in $*; do
 		case "$_v" in
 		\$*dir/*|/*|./|../) _d="${_d:-'-'} $_v";;
 		esac
 	done
 
-	eval "$1() { build $1 \$* $_d; }"
+	if [ -z "$_optstring" ]; then
+		eval "$_r() { build $_r \$* $_d; }"
+	else
+		eval "$_r() { _shake_parse_args '$_optstring' \$*; shift \$_optshift; build $_r \$* \$_deps $_d; bind opts \"\$_opts\"; }"
+	fi
 }
 
 default() {