Perform CLI argument validation as early as possible

bin/rbenv-install

@@ -101,6 +101,8 @@ for option in "${OPTIONS[@]}"; do
   esac
 done
 
+[ "${#ARGUMENTS[@]}" -le 1 ] || usage 1
+
 unset VERSION_NAME
 
 # The first argument contains the definition to install. If the
@@ -111,9 +113,6 @@ DEFINITION="${ARGUMENTS[0]}"
 [ -n "$DEFINITION" ] || DEFINITION="$(rbenv-local 2>/dev/null || true)"
 [ -n "$DEFINITION" ] || usage 1
 
-# Fail if number of arguments is greater than 1
-[ "${#ARGUMENTS[@]}" -le 1 ] || usage 1
-
 # Define `before_install` and `after_install` functions that allow
 # plugin hooks to register a string of code for execution before or
 # after the installation process.

bin/rbenv-uninstall

@@ -33,6 +33,8 @@ if [ "$1" = "-f" ] || [ "$1" = "--force" ]; then
   shift
 fi
 
+[ "$#" -eq 1 ] || usage 1
+
 DEFINITION="$1"
 case "$DEFINITION" in
 "" | -* )
@@ -44,9 +46,6 @@ case "$DEFINITION" in
   ;;
 esac
 
-# Fail if number of arguments is not equal 1
-[ "$#" -eq 1 ] || usage 1
-
 declare -a before_hooks after_hooks
 
 before_uninstall() {

bin/ruby-build

@@ -1022,6 +1022,8 @@ for option in "${OPTIONS[@]}"; do
   esac
 done
 
+[ "${#ARGUMENTS[@]}" -eq 2 ] || usage 1
+
 DEFINITION_PATH="${ARGUMENTS[0]}"
 if [ -z "$DEFINITION_PATH" ]; then
   usage
@@ -1046,9 +1048,6 @@ elif [ "${PREFIX_PATH#/}" = "$PREFIX_PATH" ]; then
   PREFIX_PATH="${PWD}/${PREFIX_PATH}"
 fi
 
-# Fail if number of arguments is not equal to 2
-[ "${#ARGUMENTS[@]}" -eq 2 ] || usage
-
 if [ -z "$TMPDIR" ]; then
   TMP="/tmp"
 else