From 581dea70d15483b56e174d8debd13a5af701692e Mon Sep 17 00:00:00 2001
From: "martin f. krafft" <madduck@madduck.net>
Date: Fri, 14 Jun 2013 10:31:01 +0200
Subject: [PATCH] Generalise determination of hacking directory path

Bash needs a special case to determine the dirname of the sourced path
(the hacking dir), but in all other cases, using $0 allows the script to
be sourced also from within the hacking directory, not only from its
parent.

Signed-off-by: martin f. krafft <madduck@madduck.net>
---
 hacking/env-setup | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/hacking/env-setup b/hacking/env-setup
index 338e768686..8eb45370ab 100755
--- a/hacking/env-setup
+++ b/hacking/env-setup
@@ -3,11 +3,12 @@
 #    modifies environment for running Ansible from checkout
 
 # When run using source as directed, $0 gets set to bash, so we must use $BASH_SOURCE
-if [ -n "$BASH_SOURCE" ] ; then
-    HACKING_DIR=`dirname $BASH_SOURCE`
-else
-    HACKING_DIR="$PWD/hacking"
-fi
+case "$0" in
+    (bash)
+        HACKING_DIR=${BASH_SOURCE%/*};;
+    (*)
+        HACKING_DIR=${0%/*};;
+esac
 # The below is an alternative to readlink -fn which doesn't exist on OS X
 # Source: http://stackoverflow.com/a/1678636
 FULL_PATH=`python -c "import os; print(os.path.realpath('$HACKING_DIR'))"`