git-remote-mediawiki: add a git bin-wrapper for developement

The introduction of the Git::Mediawiki package makes it impossible to test,
without installation, git-remote-mediawiki and git-mw.

Using a git bin-wrapper enables us to define proper $GITPERLLIB to force the
use of the developement version of the Git::Mediawiki package, bypassing its
installed version if any.

An alternate solution was to 'install' all the files required at each build
but it pollutes the toplevel with untracked files.

Signed-off-by: Benoit Person <benoit.person@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/mw-to-git/Makefile

@@ -2,6 +2,12 @@
 # Copyright (C) 2013
 #     Matthieu Moy <Matthieu.Moy@imag.fr>
 #
+# To build and test:
+#
+#   make
+#   bin-wrapper/git mw preview Some_page.mw
+#   bin-wrapper/git clone mediawiki::http://example.com/wiki/
+#
 # To install, run Git's toplevel 'make install' then run:
 #
 #   make install

contrib/mw-to-git/bin-wrapper/git

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# git executable wrapper script for Git-Mediawiki to run tests without
+# installing all the scripts and perl packages.
+
+GIT_ROOT_DIR=../../..
+GIT_EXEC_PATH=$(cd "$(dirname "$0")" && cd ${GIT_ROOT_DIR} && pwd)
+
+GITPERLLIB="$GIT_EXEC_PATH"'/contrib/mw-to-git'"${GITPERLLIB:+:$GITPERLLIB}"
+PATH="$GIT_EXEC_PATH"'/contrib/mw-to-git:'"$PATH"
+
+export GITPERLLIB PATH
+
+exec "${GIT_EXEC_PATH}/bin-wrappers/git" "$@"