From 388e36c98bf3efae3a1e25eabdd291f0b5b5e7c9 Mon Sep 17 00:00:00 2001
From: Peter Feiner <peter@gridcentric.ca>
Date: Thu, 24 Oct 2013 18:51:44 -0400
Subject: [PATCH] zsh openrc compatibility

Replacing $BASH_SOURCE with ${BASH_SOURCE:-$0} makes devstack zsh friendly: in
bash, $BASH_SOURCE is used per usual; in zsh, where $BASH_SOURCE isn't
defined, $0 is used, which, unlike in bash, evaluates to the current
source file.

Now you can source devstack's openrc from a zsh shell.

Tested with bash and zsh from directories other than the root devstack
directory.

Change-Id: Iab1a817b15d86144163b5094bb58f94b15c598a0
---
 eucarc  | 2 +-
 openrc  | 2 +-
 stackrc | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/eucarc b/eucarc
index 2b0f7dd143..350235106c 100644
--- a/eucarc
+++ b/eucarc
@@ -13,7 +13,7 @@ if [[ -n "$2" ]]; then
 fi
 
 # Find the other rc files
-RC_DIR=$(cd $(dirname "$BASH_SOURCE") && pwd)
+RC_DIR=$(cd $(dirname "${BASH_SOURCE:-$0}") && pwd)
 
 # Get user configuration
 source $RC_DIR/openrc
diff --git a/openrc b/openrc
index 3de7e3958f..5344d247bd 100644
--- a/openrc
+++ b/openrc
@@ -18,7 +18,7 @@ if [[ -n "$2" ]]; then
 fi
 
 # Find the other rc files
-RC_DIR=$(cd $(dirname "$BASH_SOURCE") && pwd)
+RC_DIR=$(cd $(dirname "${BASH_SOURCE:-$0}") && pwd)
 
 # Import common functions
 source $RC_DIR/functions
diff --git a/stackrc b/stackrc
index 0151672c1d..4da481e98e 100644
--- a/stackrc
+++ b/stackrc
@@ -1,7 +1,7 @@
 # stackrc
 #
 # Find the other rc files
-RC_DIR=$(cd $(dirname "$BASH_SOURCE") && pwd)
+RC_DIR=$(cd $(dirname "${BASH_SOURCE:-$0}") && pwd)
 
 # Destination path for installation
 DEST=/opt/stack