refactor: improve bin/configure

bin/configure

@@ -4,16 +4,14 @@ set -euC
 _venv() {
 	_py_version=${1:-3.12.0}
 
-	if command -v pyenv >/dev/null 2>&1; then
 	pyenv install $_py_version
 	pyenv shell $_py_version
+
 	if [ -d .venv ]; then
 		rm -rf .venv
 	fi
+
 	python -m venv ".venv"
-	else
-		echo "Please install pyenv"
-	fi
 }
 VENV_match=venv
 
@@ -32,7 +30,7 @@ _freeze() {
 	if [ -d .venv ]; then
 		source .venv/bin/activate
 		mv requirements.txt requirements.txt.bak
-		pip freeze >requirements.txt
+		pip freeze > requirements.txt
 	else
 		echo "Please run 'bin/configure init' first"
 	fi
@@ -48,14 +46,14 @@ _help() {
 }
 
 _check_cmds() {
-    if ! command -v pyenv >/dev/null 2>&1; then
+	if ! command -v pyenv >/dev/null; then
 		echo "Please install pyenv"
 		_fail=true
 	fi
 }
 
 _main() {
-    _fail=false
+	export _fail=false
 	_check_cmds
 
 	if $_fail; then
@@ -63,13 +61,16 @@ _main() {
 	fi
 
 	_cmd="${1:-help}"
+    if ! [ -z "$_cmd" ]; then
+        shift
+    fi
 
 	case "$_cmd" in
 	--*) ;;
 	help | -h) _help ;;
-	"$VENV_match") _venv "${2:-}" ;;
+	"$VENV_match") _venv "$@" ;;
 	"$INIT_match")
-		_venv "${2:-}"
+		_venv "$@"
 		_init
 		;;
 	"$FREEZE_match") _freeze ;;