From b6bc30edc2d33277461eb6021585e382bea77178 Mon Sep 17 00:00:00 2001
From: Peter Hoeg <p.hoeg@northwind.sg>
Date: Thu, 29 Sep 2011 12:40:33 +0800
Subject: [PATCH] change: make it work even without rbenv active

---
 plugins/rbenv/rbenv.plugin.zsh | 46 ++++++++++++++++++----------------
 1 file changed, 25 insertions(+), 21 deletions(-)

diff --git a/plugins/rbenv/rbenv.plugin.zsh b/plugins/rbenv/rbenv.plugin.zsh
index af2c3706a..4fff7e919 100644
--- a/plugins/rbenv/rbenv.plugin.zsh
+++ b/plugins/rbenv/rbenv.plugin.zsh
@@ -1,24 +1,28 @@
-alias rubies='rbenv versions'
-alias gemsets='rbenv gemset list'
+if [ -x rbenv ] ; then
+  alias rubies='rbenv versions'
+  alias gemsets='rbenv gemset list'
 
-# TODO: Make this usable w/o rbenv.
-function gems {
-  local current_ruby=`rbenv active | cut -f1 -d ' '`
-  local current_gemset=`rbenv gemset active | grep -v 'no active gemsets'`
+  current_ruby=$(rbenv active | cut -f1 -d ' ')
+  current_gemset=$(rbenv gemset active 2&>/dev/null | grep -v 'no active gemsets')
 
-  gem list $@ | sed \
-    -Ee "s/\([0-9\.]+( .+)?\)/$fg[blue]&$reset_color/g" \
-    -Ee "s|$(echo $rvm_path)|$fg[magenta]\$rvm_path$reset_color|g" \
-    -Ee "s/$current_ruby@global/$fg[yellow]&$reset_color/g" \
-    -Ee "s/$current_ruby$current_gemset$/$fg[green]&$reset_color/g"
-}
+  function gems {
+    local rbenv_path=$(rbenv prefix)
+    gem list $@ | sed \
+      -Ee "s/\([0-9\.]+( .+)?\)/$fg[blue]&$reset_color/g" \
+      -Ee "s|$(echo $rbenv_path)|$fg[magenta]\$rbenv_path$reset_color|g" \
+      -Ee "s/$current_ruby@global/$fg[yellow]&$reset_color/g" \
+      -Ee "s/$current_ruby$current_gemset$/$fg[green]&$reset_color/g"
+  }
 
-function rbenv_prompt_info() {
-  ruby_version=$(rbenv version | cut -f1 -d ' ') || return
-  gemset=$(rbenv gemset active 2&>/dev/null | grep -v 'no active gemsets')
-  if [[ -n $gemset ]] ; then
-    echo "${ruby_version}@${gemset}"
-  else
-    echo "${ruby_version}"
-  fi
-}
+  function rbenv_prompt_info() {
+    if [[ -n $gemset ]] ; then
+      echo "${ruby_version}@${gemset}"
+    else
+      echo "${ruby_version}"
+    fi
+  }
+else
+  alias rubies='ruby -v'
+  function gemsets() { echo 'not supported' }
+  function rbenv_prompt_info() { echo '' }
+fi