From 88cc895a7067dc6b7662755796a7cd749f71aee2 Mon Sep 17 00:00:00 2001
From: paulanda <40282207+paulanda@users.noreply.github.com>
Date: Tue, 16 Apr 2019 13:33:02 -0600
Subject: setup-env.sh: fix zsh compatibility error (#11153)

Still look for BASH_SOURCE[0] first, but if it's not set,
_sp_source_file is initialized to an empty value addressing the
unset parameter error (line 217).
---
 share/spack/setup-env.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/share/spack/setup-env.sh b/share/spack/setup-env.sh
index 3698bb35b0..3c4342d852 100755
--- a/share/spack/setup-env.sh
+++ b/share/spack/setup-env.sh
@@ -214,10 +214,10 @@ fi
 # Figure out where this file is.  Below code needs to be portable to
 # bash and zsh.
 #
-_sp_source_file="${BASH_SOURCE[0]}"  # Bash's location of last sourced file.
+_sp_source_file="${BASH_SOURCE[0]:-}"  # Bash's location of last sourced file.
 if [ -z "$_sp_source_file" ]; then
-    _sp_source_file="$0:A"           # zsh way to do it
-    if [[ "$_sp_source_file" == *":A" ]]; then
+    _sp_source_file="${(%):-%N}"       # zsh way to do it
+    if [ -z "$_sp_source_file" ]; then
         # Not zsh either... bail out with plain old $0,
         # which WILL NOT work if this is sourced indirectly.
         _sp_source_file="$0"
-- 
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