From 7cf7f54a65aa1c70e21fe73753f6b0671d129adf Mon Sep 17 00:00:00 2001
From: Jeff King <peff@peff.net>
Date: Sun, 24 Feb 2008 14:40:45 -0500
Subject: [PATCH] use build-time SHELL_PATH in test scripts

The top-level Makefile now creates a GIT-BUILD-OPTIONS file
which stores any options selected by the make process that
may be of use to further parts of the build process.
Specifically, we store the SHELL_PATH so that it can be used
by tests to construct shell scripts on the fly.

The format of the GIT-BUILD-OPTIONS file is Bourne shell,
and it is sourced by test-lib.sh; all tests can rely on just
having $SHELL_PATH correctly set in the environment.

The GIT-BUILD-OPTIONS file is written every time the
toplevel 'make' is invoked. Since the only users right now
are the test scripts, there's no drawback to updating its
timestamp. If something build-related depends on this, we
can do a trick similar to the one used by GIT-CFLAGS.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 .gitignore                    | 1 +
 Makefile                      | 8 ++++++--
 t/t3404-rebase-interactive.sh | 2 +-
 t/test-lib.sh                 | 2 ++
 4 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index 165b256e2e..4ff2fec278 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+GIT-BUILD-OPTIONS
 GIT-CFLAGS
 GIT-GUI-VARS
 GIT-VERSION-FILE
diff --git a/Makefile b/Makefile
index a5b6eebf1a..c2f84a76f6 100644
--- a/Makefile
+++ b/Makefile
@@ -812,7 +812,7 @@ export TAR INSTALL DESTDIR SHELL_PATH
 
 ### Build rules
 
-all:: $(ALL_PROGRAMS) $(BUILT_INS) $(OTHER_PROGRAMS)
+all:: $(ALL_PROGRAMS) $(BUILT_INS) $(OTHER_PROGRAMS) GIT-BUILD-OPTIONS
 ifneq (,$X)
 	$(foreach p,$(patsubst %$X,%,$(filter %$X,$(ALL_PROGRAMS) $(BUILT_INS) git$X)), $(RM) '$p';)
 endif
@@ -1011,6 +1011,9 @@ GIT-CFLAGS: .FORCE-GIT-CFLAGS
 		echo "$$FLAGS" >GIT-CFLAGS; \
             fi
 
+GIT-BUILD-OPTIONS: .FORCE-GIT-BUILD-OPTIONS
+	@echo SHELL_PATH=\''$(SHELL_PATH_SQ)'\' >$@
+
 ### Detect Tck/Tk interpreter path changes
 ifndef NO_TCLTK
 TRACK_VARS = $(subst ','\'',-DTCLTK_PATH='$(TCLTK_PATH_SQ)')
@@ -1166,10 +1169,11 @@ ifndef NO_TCLTK
 	$(MAKE) -C gitk-git clean
 	$(MAKE) -C git-gui clean
 endif
-	$(RM) GIT-VERSION-FILE GIT-CFLAGS GIT-GUI-VARS
+	$(RM) GIT-VERSION-FILE GIT-CFLAGS GIT-GUI-VARS GIT-BUILD-OPTIONS
 
 .PHONY: all install clean strip
 .PHONY: .FORCE-GIT-VERSION-FILE TAGS tags cscope .FORCE-GIT-CFLAGS
+.PHONY: .FORCE-GIT-BUILD-OPTIONS
 
 ### Check documentation
 #
diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 62e65d704b..049aa37538 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -61,7 +61,7 @@ test_expect_success 'setup' '
 	git tag I
 '
 
-echo "#!$SHELL" >fake-editor
+echo "#!$SHELL_PATH" >fake-editor.sh
 cat >> fake-editor.sh <<\EOF
 case "$1" in
 */COMMIT_EDITMSG)
diff --git a/t/test-lib.sh b/t/test-lib.sh
index 90df619b9f..68efda4492 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -359,6 +359,8 @@ if ! test -x ../test-chmtime; then
 	exit 1
 fi
 
+. ../GIT-BUILD-OPTIONS
+
 # Test repository
 test=trash
 rm -fr "$test"