git-remote-mediawiki: introduction of Git::Mediawiki.pm

We would want to allow the user to preview what he has edited locally
before pushing it out (and thus creating a non-removable revision in
the mediawiki's history).

This patch introduces a new perl package in which we will be able to
share code between that new tool and the remote helper:
git-remote-mediawiki.perl.

A perl package offers the best way to handle such case: Each script
can select what should be imported in its namespace.  The package
namespacing limits the use of side effects in the shared code.

An alternate solution is to concatenate a "toolset" file with each
*.perl when 'make'-ing the project. In that scheme, everything is
imported in the script's namespace. Plus, files should be renamed in
order to chain to Git's toplevel makefile. Hence, this solution is not
acceptable.

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/Git/Mediawiki.pm

@@ -0,0 +1,24 @@
+package Git::Mediawiki;
+
+use 5.008;
+use strict;
+use Git;
+
+BEGIN {
+
+our ($VERSION, @ISA, @EXPORT, @EXPORT_OK);
+
+# Totally unstable API.
+$VERSION = '0.01';
+
+require Exporter;
+
+@ISA = qw(Exporter);
+
+@EXPORT = ();
+
+# Methods which can be called as standalone functions as well:
+@EXPORT_OK = ();
+}
+
+1; # Famous last words

contrib/mw-to-git/Makefile

@@ -2,18 +2,36 @@
 # Copyright (C) 2013
 #     Matthieu Moy <Matthieu.Moy@imag.fr>
 #
-## Build git-remote-mediawiki
+# To install, run Git's toplevel 'make install' then run:
+#
+#   make install
 
+GIT_MEDIAWIKI_PM=Git/Mediawiki.pm
 SCRIPT_PERL=git-remote-mediawiki.perl
 GIT_ROOT_DIR=../..
 HERE=contrib/mw-to-git/
 
 SCRIPT_PERL_FULL=$(patsubst %,$(HERE)/%,$(SCRIPT_PERL))
+INSTLIBDIR=$(shell $(MAKE) -C $(GIT_ROOT_DIR)/perl \
+                -s --no-print-directory instlibdir)
 
 all: build
 
-build install clean:
+install_pm:
+	install $(GIT_MEDIAWIKI_PM) $(INSTLIBDIR)/$(GIT_MEDIAWIKI_PM)
+
+build:
+	$(MAKE) -C $(GIT_ROOT_DIR) SCRIPT_PERL=$(SCRIPT_PERL_FULL) \
+                build-perl-script
+
+install: install_pm
 	$(MAKE) -C $(GIT_ROOT_DIR) SCRIPT_PERL=$(SCRIPT_PERL_FULL) \
-                $@-perl-script
+                install-perl-script
+
+clean:
+	$(MAKE) -C $(GIT_ROOT_DIR) SCRIPT_PERL=$(SCRIPT_PERL_FULL) \
+                clean-perl-script
+	rm $(INSTLIBDIR)/$(GIT_MEDIAWIKI_PM)
+
 perlcritic:
 	perlcritic -2 *.perl