[PATCH v8 2/7] wrap-for-bin: Make bin-wrappers chainable

[benoit.person@ensimag.fr]

From: Benoit Person <benoit.person@ensimag.fr>

For now, bin-wrappers overwrites GITPERLLIB. If we want to chain to
those scripts and define GITPERLLIB before, our changes will be
discarded.

This patch makes the bin-wrappers prepend their modifications to
GITPERLLIB rather than redefining it. It also unset GITPERLLIB in the
test-suite to prevent broken $GITPERLLIB in the user's configuration
from interfering with the testsuite.

The codes using GIT_TEMPLATE_DIR and GIT_TEXTDOMAINDIR handle only one
path in each of this variable so this new behavior would be useless on
those variables.

Signed-off-by: Benoit Person <benoit.person@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
---
 t/test-lib.sh   | 1 +
 wrap-for-bin.sh | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/t/test-lib.sh b/t/test-lib.sh
index eff3a65..43e2a39 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -92,6 +92,7 @@ unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
 	print join("\n", @vars);
 ')
 unset XDG_CONFIG_HOME
+unset GITPERLLIB
 GIT_AUTHOR_EMAIL=author@example.com
 GIT_AUTHOR_NAME='A U Thor'
 GIT_COMMITTER_EMAIL=committer@example.com
diff --git a/wrap-for-bin.sh b/wrap-for-bin.sh
index 53a8dd0..35b394a 100644
--- a/wrap-for-bin.sh
+++ b/wrap-for-bin.sh
@@ -14,7 +14,7 @@ else
 	GIT_TEMPLATE_DIR='@@BUILD_DIR@@/templates/blt'
 	export GIT_TEMPLATE_DIR
 fi
-GITPERLLIB='@@BUILD_DIR@@/perl/blib/lib'
+GITPERLLIB='@@BUILD_DIR@@/perl/blib/lib:'"${GITPERLLIB:+:$GITPERLLIB}"
 GIT_TEXTDOMAINDIR='@@BUILD_DIR@@/po/build/locale'
 PATH='@@BUILD_DIR@@/bin-wrappers:'"$PATH"
 export GIT_EXEC_PATH GITPERLLIB PATH GIT_TEXTDOMAINDIR
-- 
1.8.3.1.590.gc07d91b