From cf3728c5aad9e94bf412ad22a5f311c95a75210e Mon Sep 17 00:00:00 2001
From: Ivan Povalyukhin <ipovalyukhin@yammer-inc.com>
Date: Sat, 30 May 2015 00:26:22 -0700
Subject: [PATCH] [pathmunge] added function to prevent duplicates in PATH
 variable

---
 lib/helpers.bash | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/lib/helpers.bash b/lib/helpers.bash
index 9c4c4dbc..c5ae9cd1 100644
--- a/lib/helpers.bash
+++ b/lib/helpers.bash
@@ -361,3 +361,21 @@ all_groups ()
     cat $file | sort | uniq
     rm $file
 }
+
+if ! type pathmunge > /dev/null 2>&1
+then
+  function pathmunge () {
+    _about 'prevent duplicate directories in you PATH variable'
+    _group 'lib helpers'
+    _example 'pathmunge /path/to/dir is equivalent to PATH=/path/to/dir:$PATH'
+    _example 'pathmunge /path/to/dir after is equivalent to PATH=$PATH:/path/to/dir'
+
+    if ! [[ $PATH =~ (^|:)$1($|:) ]] ; then
+      if [ "$2" = "after" ] ; then
+        export PATH=$PATH:$1
+      else
+        export PATH=$1:$PATH
+      fi
+    fi
+  }
+fi