From 2b21e22e976ae905bb80585ccfe9a57e1dcc64de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mislav=20Marohnic=CC=81?= <mislav.marohnic@gmail.com>
Date: Sat, 29 Dec 2012 22:03:04 +0100
Subject: [PATCH] display help for commands that have Summary but not Usage

A command doesn't have to specify Usage docs if it doesn't accept any
arguments. The default usage for a command will be printed as:

    Usage: rbenv ${command}
---
 libexec/rbenv-help   | 8 ++++++--
 libexec/rbenv-rehash | 1 -
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/libexec/rbenv-help b/libexec/rbenv-help
index d43782c4..3bba20ad 100755
--- a/libexec/rbenv-help
+++ b/libexec/rbenv-help
@@ -97,8 +97,12 @@ print_help() {
   eval "$(documentation_for "$command")"
   [ -n "$help" ] || help="$summary"
 
-  if [ -n "$usage" ]; then
-    echo "$usage"
+  if [ -n "$usage" -o -n "$summary" ]; then
+    if [ -n "$usage" ]; then
+      echo "$usage"
+    else
+      echo "Usage: rbenv ${command}"
+    fi
     if [ -n "$help" ]; then
       echo
       echo "$help"
diff --git a/libexec/rbenv-rehash b/libexec/rbenv-rehash
index 0f147385..a50819dd 100755
--- a/libexec/rbenv-rehash
+++ b/libexec/rbenv-rehash
@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
 # Summary: Rehash rbenv shims (run this after installing binaries)
-# Usage: rbenv rehash
 
 set -e
 [ -n "$RBENV_DEBUG" ] && set -x