[PATCH/RFC 3/3] t/gitweb-lib.sh: Add support for GITWEB_TEST_INSTALLED

[Jakub Narebski <jnareb@gmail.com>]

You can set the GITWEB_TEST_INSTALLED environment variable to the
gitwebdir (the directory where gitweb is installed / deployed to) of
an existing gitweb instalation to test that installation.

This change is intended to make it possible to test that process of
installing gitweb (and the modules it depends on) works correctly
after splitting gitweb.

Signed-off-by: Jakub Narebski <jnareb@gmail.com>
---

It is an RFC because I am not sure where to put documentation,
i.e. description of GITWEB_TEST_INSTALLED.  Should it be put in
t/README, in gitweb/README, or in gitweb/INSTALL, or in
t/gitweb-lib.sh header?

 t/gitweb-lib.sh |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/t/gitweb-lib.sh b/t/gitweb-lib.sh
index 8c490c8..b17459c 100755
--- a/t/gitweb-lib.sh
+++ b/t/gitweb-lib.sh
@@ -32,17 +32,28 @@ EOF
 	cat >.git/description <<EOF
 $0 test repository
 EOF
+
+	# You can set the GITWEB_TEST_INSTALLED environment variable to
+	# the gitwebdir (the directory where gitweb is installed / deployed to)
+	# of an existing gitweb instalation to test that installation.
+	if test -n "$GITWEB_TEST_INSTALLED" ; then
+		SCRIPT_NAME="$GITWEB_TEST_INSTALLED/gitweb.cgi"
+		test -f "$SCRIPT_NAME" ||
+		error "Cannot find gitweb.cgi at $GITWEB_TEST_INSTALLED."
+	else # normal case, use source version of gitweb
+		SCRIPT_NAME="$GIT_BUILD_DIR/gitweb/gitweb.perl"
+	fi
+	export SCRIPT_NAME
 }
 
 gitweb_run () {
 	GATEWAY_INTERFACE='CGI/1.1'
 	HTTP_ACCEPT='*/*'
 	REQUEST_METHOD='GET'
-	SCRIPT_NAME="$GIT_BUILD_DIR/gitweb/gitweb.perl"
 	QUERY_STRING=""$1""
 	PATH_INFO=""$2""
 	export GATEWAY_INTERFACE HTTP_ACCEPT REQUEST_METHOD \
-		SCRIPT_NAME QUERY_STRING PATH_INFO
+		QUERY_STRING PATH_INFO
 
 	GITWEB_CONFIG=$(pwd)/gitweb_config.perl
 	export GITWEB_CONFIG
-- 
1.7.2.1