From 957baa4fc3e59dc480f879bbe2eb732acd88a4ef Mon Sep 17 00:00:00 2001
From: Felipe Contreras <felipe.contreras@gmail.com>
Date: Tue, 5 Mar 2024 23:27:50 -0600
Subject: [PATCH] Fix zsh default srcdir support

It turns that by adding zsh support in 00cb93e (Add initial support for
zsh, 2023-03-10) we disabled the feature enabled in 0bc8705 (Set proper
location of TEST_SRCDIR, 2022-09-07) for zsh.

In order for SHARNESS_TEST_SRCDIR to have a proper default in zsh, we
need to restore the previous semantics of $0.

Let's do that by storing the value of $0 before POSIX_ARGZERO is turned
on.

Helps issue #124.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 sharness.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sharness.sh b/sharness.sh
index b6f2f08c7..722479152 100644
--- a/sharness.sh
+++ b/sharness.sh
@@ -20,7 +20,10 @@
 
 if test -n "${ZSH_VERSION-}"
 then
+	SHARNESS_SOURCE=$0
 	emulate sh -o POSIX_ARGZERO
+else
+	SHARNESS_SOURCE=${BASH_SOURCE-$0}
 fi
 
 # Public: Current version of Sharness.
@@ -40,7 +43,7 @@ SHARNESS_TEST_DIRECTORY=$(cd "$SHARNESS_TEST_DIRECTORY" && pwd) || exit 1
 export SHARNESS_TEST_DIRECTORY
 
 # shellcheck disable=SC3028
-: "${SHARNESS_TEST_SRCDIR:=$(cd "$(dirname "${BASH_SOURCE-$0}")" && pwd)}"
+: "${SHARNESS_TEST_SRCDIR:=$(cd "$(dirname "$SHARNESS_SOURCE")" && pwd)}"
 # Public: Source directory of test code and sharness library.
 # This directory may be different from the directory in which tests are
 # being run.