From 9afe94bac03b277b11be9a18c7a10f7bf49cff47 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Mon, 5 Aug 2013 23:52:12 +1200
Subject: Test for substring presence in cd function

---
 bash/bashrc.d/cd.bash | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/bash/bashrc.d/cd.bash b/bash/bashrc.d/cd.bash
index 0b4944ba..4adaafab 100644
--- a/bash/bashrc.d/cd.bash
+++ b/bash/bashrc.d/cd.bash
@@ -7,7 +7,12 @@ __cd() {
     done
     shift "$(($OPTIND-1))"
     if [[ "$#" -eq 2 ]]; then
-        builtin cd $opts "${PWD/$1/$2}"
+        if [[ "$PWD" == *"$1"* ]]; then
+            builtin cd $opts "${PWD/$1/$2}"
+        else
+            printf 'bash: cd: could not replace substring\n'
+            return 1
+        fi
     else
         builtin cd $opts "$@"
     fi
-- 
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