[PATCH v5 0/5] git-remote-mediawiki: new tool to preview local changes without pushing

[PATCH v5 0/5] git-remote-mediawiki: new tool to preview local changes without pushing

[benoit.person]

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

The #7 issue on git-mediawiki's issue tracker [1] states that the ability to
preview content without pushing would be a nice thing to have.

changes from v4:
  - Rebase on latest master
  - Typos in commits messages and code
  - Comments in Makefile
  - Factoring the conversion from relatives links to absolute ones in
    `git mw preview`
  - Updating that "conversion" mechanism to not convert links with an
    anchor '#'.
  - git-mw should be executable now.

changes from v3:
  - Rewrite all commit messages.
  - No more "\ No newline at end of file".
  - Rename GitMediawiki.pm into Git::Mediawiki.pm (so it moves GitMedawiki.pm
    into Git/Mediawiki.pm).
  - Remove from the Makefile the copy_pm target (see below 'Add a bin-wrapper').
  - Use of 'install' insted of 'cp' in the Makefile.
  - Comment on the install_pm target in the Makefile.
  - Add a bin-wrapper for git to test scripts without 'make install'-ing them.
  - Move verbose option handling from previous v3-4/4 (introduction of preview
  	tool) into v4-4/5 (introduction of git-mw).
  - Refactor some code into subroutines to clean the global 'preview'
    subroutine.
  - Rewrite some error messages to make them more concise while still giving
    the same amount of information.
  - Use 'remote.${remote_name}.mwIDcontent' instead of 'mediawiki.IDContent'
    as config item for the lookup ID used to combine template + new content.
  - Remove comments about what's going on in the preview subroutine.
  - Use 'clean_filename' (and not 'smudge_filename') in the preview tool to find
    the correct mediawiki page name based on a filename.
  - Remove space/tab mixup in the 'help' subroutine.

changes from v2:
  - Add a way to test, without installation, code that uses GitMediawiki.pm.
  - Move more constants to GitMediawiki.pm
  - Remove the encapsulation of Git::config calls into a git_cmd_try one.
  - Remove the --blob option, distinction between files and blobs is now 
    automatic.
  - Add a --verbose option to output more information on what's going on.
  - Rewrote the doc and the commit message.
  - Rewrote of the template retrieving code (see 'get_template' sub).
  - Use a configuration variable to define the content ID search in the
    template. Default value set as 'bodyContent' since it seems more standard
    than 'mw-content-text'.
  - Final content is now saved as utf-8 to solve encoding issues.
  - Perlcritic changes: 
    - Update for loops style to a more perlish one.
    - All 'print's specify their output streams.
    --> Same useless warnings left in git-remote-mediawiki.perl after célestin's 
        work and git-mw.perl after this patch :) .

changes from v1:
  - add new package GitMediawiki
    - move some of git-remote-mediawiki functions into the package
    - update git-remote-mediawiki to use those "moved" functions
    - add a hacky-way to install it in the Makefile
    - use it in the new git mw tool
  - add a way to give to the preview tool blobs as argument
  - add a fallback when the upstream's branch remote is not a mediawiki remote
  - update the `autoload` option to use `git web--browse` and not `xdg-open`
  - update the way we find the upstream's branch remote name

This serie is based on the 'master' branch merged with célestin's patch series.

[1] https://github.com/moy/Git-Mediawiki/issues/7

Benoit Person (5):
  git-remote-mediawiki: Introduction of Git::Mediawiki.pm
  git-remote-mediawiki: new git bin-wrapper for developement
  git-remote-mediawiki: factoring code between git-remote-mediawiki and
    Git::Mediawiki
  git-remote-mediawiki: Adding git-mw command
  git-remote-mediawiki: Add preview subcommand into git mw.

 contrib/mw-to-git/Git/Mediawiki.pm          | 100 ++++++++
 contrib/mw-to-git/Makefile                  |  33 ++-
 contrib/mw-to-git/git                       |  25 ++
 contrib/mw-to-git/git-mw.perl               | 368 ++++++++++++++++++++++++++++
 contrib/mw-to-git/git-remote-mediawiki.perl |  85 +------
 5 files changed, 535 insertions(+), 76 deletions(-)
 create mode 100644 contrib/mw-to-git/Git/Mediawiki.pm
 create mode 100755 contrib/mw-to-git/git
 create mode 100755 contrib/mw-to-git/git-mw.perl

-- 
1.8.3.GIT

[PATCH v5 1/5] git-remote-mediawiki: Introduction of Git::Mediawiki.pm

[benoit.person]

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

Currently, the mw-to-git project contains only a remote helper
(git-remote-mediawiki.perl). To improve the user experience while
working with mediawiki remotes, new tools, designed for such cases,
should be created. To achieve this goal, the project needs a way to
share code between several scripts (remote helper, commands, ... ).

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>

---
 contrib/mw-to-git/Git/Mediawiki.pm | 24 ++++++++++++++++++++++++
 contrib/mw-to-git/Makefile         | 24 +++++++++++++++++++++---
 2 files changed, 45 insertions(+), 3 deletions(-)
 create mode 100644 contrib/mw-to-git/Git/Mediawiki.pm

diff --git a/contrib/mw-to-git/Git/Mediawiki.pm b/contrib/mw-to-git/Git/Mediawiki.pm
new file mode 100644
index 0000000..805f42a
--- /dev/null
+++ b/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
diff --git a/contrib/mw-to-git/Makefile b/contrib/mw-to-git/Makefile
index 1fb2424..a6f8b24 100644
--- a/contrib/mw-to-git/Makefile
+++ b/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
-- 
1.8.3.GIT

[PATCH v5 2/5] git-remote-mediawiki: new git bin-wrapper for developement

[benoit.person]

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

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>

---
 contrib/mw-to-git/Makefile |  6 ++++++
 contrib/mw-to-git/git      | 25 +++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100755 contrib/mw-to-git/git

diff --git a/contrib/mw-to-git/Makefile b/contrib/mw-to-git/Makefile
index a6f8b24..2a80d56 100644
--- a/contrib/mw-to-git/Makefile
+++ b/contrib/mw-to-git/Makefile
@@ -2,6 +2,12 @@
 # Copyright (C) 2013
 #     Matthieu Moy <Matthieu.Moy@imag.fr>
 #
+# To build and test:
+#
+#   make:
+#     ./git mw preview Some_page.mw
+#     ./git clone mediawiki::http://example.com/wiki/
+#
 # To install, run Git's toplevel 'make install' then run:
 #
 #   make install
diff --git a/contrib/mw-to-git/git b/contrib/mw-to-git/git
new file mode 100755
index 0000000..25b60ad
--- /dev/null
+++ b/contrib/mw-to-git/git
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# git executable wrapper script for Git-Mediawiki to run tests without
+# installing all the scripts and perl packages.
+
+# based on $GIT_ROOT_DIR/wrap-for-bin.sh
+
+
+GIT_ROOT_DIR=../..
+GIT_EXEC_PATH=$(cd "$(dirname "$0")" && cd ${GIT_ROOT_DIR} && pwd)
+
+if test -n "$NO_SET_GIT_TEMPLATE_DIR"
+then
+	unset GIT_TEMPLATE_DIR
+else
+	GIT_TEMPLATE_DIR="$GIT_EXEC_PATH"'/templates/blt'
+	export GIT_TEMPLATE_DIR
+fi
+# Hack to make the `use lib` call works with multiple paths
+GITPERLLIB="$GIT_EXEC_PATH"'/contrib/mw-to-git:'"$GIT_EXEC_PATH"'/perl/blib/lib'
+GIT_TEXTDOMAINDIR="$GIT_EXEC_PATH"'/po/build/locale'
+PATH="$GIT_EXEC_PATH"'/contrib/mw-to-git:'"$GIT_EXEC_PATH"'/bin-wrappers:'"$PATH"
+export GIT_EXEC_PATH GITPERLLIB PATH GIT_TEXTDOMAINDIR
+
+exec "${GIT_EXEC_PATH}/git" "$@"
\ No newline at end of file
-- 
1.8.3.GIT

[PATCH v5 3/5] git-remote-mediawiki: factoring code between git-remote-mediawiki and Git::Mediawiki

[benoit.person]

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

For now, Git::Mediawiki contains nothing.

This first patch moves some of git-remote-mediawiki.perl's factorisable code
into Git::Mediawiki. In the same time, it removes the side effects of that code
and renames the fucntions and constants moved to expose a better API.

Signed-off-by: Benoit Person <benoit.person@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>

---
 contrib/mw-to-git/Git/Mediawiki.pm          | 77 +++++++++++++++++++++++++-
 contrib/mw-to-git/git-remote-mediawiki.perl | 85 +++++------------------------
 2 files changed, 89 insertions(+), 73 deletions(-)

diff --git a/contrib/mw-to-git/Git/Mediawiki.pm b/contrib/mw-to-git/Git/Mediawiki.pm
index 805f42a..47fe4f4 100644
--- a/contrib/mw-to-git/Git/Mediawiki.pm
+++ b/contrib/mw-to-git/Git/Mediawiki.pm
@@ -18,7 +18,82 @@ require Exporter;
 @EXPORT = ();
 
 # Methods which can be called as standalone functions as well:
-@EXPORT_OK = ();
+@EXPORT_OK = qw(clean_filename smudge_filename connect_maybe
+				EMPTY HTTP_CODE_OK);
+}
+
+# Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
+use constant SLASH_REPLACEMENT => '%2F';
+
+# Used to test for empty strings
+use constant EMPTY => q{};
+
+# HTTP codes
+use constant HTTP_CODE_OK => 200;
+
+sub clean_filename {
+	my $filename = shift;
+	$filename =~ s{@{[SLASH_REPLACEMENT]}}{/}g;
+	# [, ], |, {, and } are forbidden by MediaWiki, even URL-encoded.
+	# Do a variant of URL-encoding, i.e. looks like URL-encoding,
+	# but with _ added to prevent MediaWiki from thinking this is
+	# an actual special character.
+	$filename =~ s/[\[\]\{\}\|]/sprintf("_%%_%x", ord($&))/ge;
+	# If we use the uri escape before
+	# we should unescape here, before anything
+
+	return $filename;
+}
+
+sub smudge_filename {
+	my $filename = shift;
+	$filename =~ s{/}{@{[SLASH_REPLACEMENT]}}g;
+	$filename =~ s/ /_/g;
+	# Decode forbidden characters encoded in clean_filename
+	$filename =~ s/_%_([0-9a-fA-F][0-9a-fA-F])/sprintf('%c', hex($1))/ge;
+	return $filename;
+}
+
+sub connect_maybe {
+	my $wiki = shift;
+	if ($wiki) {
+		return $wiki;
+	}
+
+	my $remote_name = shift;
+	my $remote_url = shift;
+	my ($wiki_login, $wiki_password, $wiki_domain);
+
+	$wiki_login = Git::config("remote.${remote_name}.mwLogin");
+	$wiki_password = Git::config("remote.${remote_name}.mwPassword");
+	$wiki_domain = Git::config("remote.${remote_name}.mwDomain");
+
+	$wiki = MediaWiki::API->new;
+	$wiki->{config}->{api_url} = "${remote_url}/api.php";
+	if ($wiki_login) {
+		my %credential = (
+			'url' => $remote_url,
+			'username' => $wiki_login,
+			'password' => $wiki_password
+		);
+		Git::credential(\%credential);
+		my $request = {lgname => $credential{username},
+			       lgpassword => $credential{password},
+			       lgdomain => $wiki_domain};
+		if ($wiki->login($request)) {
+			Git::credential(\%credential, 'approve');
+			print {*STDERR} qq(Logged in mediawiki user "$credential{username}".\n);
+		} else {
+			print {*STDERR} qq(Failed to log in mediawiki user "$credential{username}" on ${remote_url}\n);
+			print {*STDERR} '  (error ' .
+				$wiki->{error}->{code} . ': ' .
+				$wiki->{error}->{details} . ")\n";
+			Git::credential(\%credential, 'reject');
+			exit 1;
+		}
+	}
+
+	return $wiki;
 }
 
 1; # Famous last words
diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
index 71baf8a..e40c034 100755
--- a/contrib/mw-to-git/git-remote-mediawiki.perl
+++ b/contrib/mw-to-git/git-remote-mediawiki.perl
@@ -14,6 +14,8 @@
 use strict;
 use MediaWiki::API;
 use Git;
+use Git::Mediawiki qw(clean_filename smudge_filename connect_maybe
+					EMPTY HTTP_CODE_OK);
 use DateTime::Format::ISO8601;
 use warnings;
 
@@ -23,9 +25,6 @@ binmode STDOUT, ':encoding(UTF-8)';
 
 use URI::Escape;
 
-# Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
-use constant SLASH_REPLACEMENT => '%2F';
-
 # It's not always possible to delete pages (may require some
 # privileges). Deleted pages are replaced with this content.
 use constant DELETED_CONTENT => "[[Category:Deleted]]\n";
@@ -40,8 +39,6 @@ use constant NULL_SHA1 => '0000000000000000000000000000000000000000';
 # Used on Git's side to reflect empty edit messages on the wiki
 use constant EMPTY_MESSAGE => '*Empty MediaWiki Message*';
 
-use constant EMPTY => q{};
-
 # Number of pages taken into account at once in submodule get_mw_page_list
 use constant SLICE_SIZE => 50;
 
@@ -50,8 +47,6 @@ use constant SLICE_SIZE => 50;
 # the number of links to be returned (500 links max).
 use constant BATCH_SIZE => 10;
 
-use constant HTTP_CODE_OK => 200;
-
 if (@ARGV != 2) {
 	exit_error_usage();
 }
@@ -199,37 +194,6 @@ sub parse_command {
 # MediaWiki API instance, created lazily.
 my $mediawiki;
 
-sub mw_connect_maybe {
-	if ($mediawiki) {
-		return;
-	}
-	$mediawiki = MediaWiki::API->new;
-	$mediawiki->{config}->{api_url} = "${url}/api.php";
-	if ($wiki_login) {
-		my %credential = (
-			'url' => $url,
-			'username' => $wiki_login,
-			'password' => $wiki_passwd
-		);
-		Git::credential(\%credential);
-		my $request = {lgname => $credential{username},
-			       lgpassword => $credential{password},
-			       lgdomain => $wiki_domain};
-		if ($mediawiki->login($request)) {
-			Git::credential(\%credential, 'approve');
-			print {*STDERR} qq(Logged in mediawiki user "$credential{username}".\n);
-		} else {
-			print {*STDERR} qq(Failed to log in mediawiki user "$credential{username}" on ${url}\n);
-			print {*STDERR} '  (error ' .
-				$mediawiki->{error}->{code} . ': ' .
-				$mediawiki->{error}->{details} . ")\n";
-			Git::credential(\%credential, 'reject');
-			exit 1;
-		}
-	}
-	return;
-}
-
 sub fatal_mw_error {
 	my $action = shift;
 	print STDERR "fatal: could not $action.\n";
@@ -339,7 +303,7 @@ sub get_mw_first_pages {
 
 # Get the list of pages to be fetched according to configuration.
 sub get_mw_pages {
-	mw_connect_maybe();
+	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 
 	print {*STDERR} "Listing pages on remote wiki...\n";
 
@@ -529,7 +493,7 @@ sub get_last_local_revision {
 # avoid a loop onto all tracked pages. This is useful for the fetch-by-rev
 # option.
 sub get_last_global_remote_rev {
-	mw_connect_maybe();
+	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 
 	my $query = {
 		action => 'query',
@@ -545,7 +509,7 @@ sub get_last_global_remote_rev {
 # Get the last remote revision concerning the tracked pages and the tracked
 # categories.
 sub get_last_remote_revision {
-	mw_connect_maybe();
+	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 
 	my %pages_hash = get_mw_pages();
 	my @pages = values(%pages_hash);
@@ -601,29 +565,6 @@ sub mediawiki_smudge {
 	return "${string}\n";
 }
 
-sub mediawiki_clean_filename {
-	my $filename = shift;
-	$filename =~ s{@{[SLASH_REPLACEMENT]}}{/}g;
-	# [, ], |, {, and } are forbidden by MediaWiki, even URL-encoded.
-	# Do a variant of URL-encoding, i.e. looks like URL-encoding,
-	# but with _ added to prevent MediaWiki from thinking this is
-	# an actual special character.
-	$filename =~ s/[\[\]\{\}\|]/sprintf("_%%_%x", ord($&))/ge;
-	# If we use the uri escape before
-	# we should unescape here, before anything
-
-	return $filename;
-}
-
-sub mediawiki_smudge_filename {
-	my $filename = shift;
-	$filename =~ s{/}{@{[SLASH_REPLACEMENT]}}g;
-	$filename =~ s/ /_/g;
-	# Decode forbidden characters encoded in mediawiki_clean_filename
-	$filename =~ s/_%_([0-9a-fA-F][0-9a-fA-F])/sprintf('%c', hex($1))/ge;
-	return $filename;
-}
-
 sub literal_data {
 	my ($content) = @_;
 	print {*STDOUT} 'data ', bytes::length($content), "\n", $content;
@@ -831,7 +772,7 @@ sub mw_import_ref {
 		return;
 	}
 
-	mw_connect_maybe();
+	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 
 	print {*STDERR} "Searching revisions...\n";
 	my $last_local = get_last_local_revision();
@@ -945,7 +886,7 @@ sub mw_import_revids {
 		my %commit;
 		$commit{author} = $rev->{user} || 'Anonymous';
 		$commit{comment} = $rev->{comment} || EMPTY_MESSAGE;
-		$commit{title} = mediawiki_smudge_filename($page_title);
+		$commit{title} = smudge_filename($page_title);
 		$commit{mw_revision} = $rev->{revid};
 		$commit{content} = mediawiki_smudge($rev->{'*'});
 
@@ -1006,7 +947,7 @@ sub mw_upload_file {
 	}
 	# Deleting and uploading a file requires a priviledged user
 	if ($file_deleted) {
-		mw_connect_maybe();
+		$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 		my $query = {
 			action => 'delete',
 			title => $path,
@@ -1022,7 +963,7 @@ sub mw_upload_file {
 		# Don't let perl try to interpret file content as UTF-8 => use "raw"
 		my $content = run_git("cat-file blob ${new_sha1}", 'raw');
 		if ($content ne EMPTY) {
-			mw_connect_maybe();
+			$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 			$mediawiki->{config}->{upload_url} =
 				"${url}/index.php/Special:Upload";
 			$mediawiki->edit({
@@ -1070,7 +1011,7 @@ sub mw_push_file {
 	my $old_sha1 = $diff_info_split[2];
 	my $page_created = ($old_sha1 eq NULL_SHA1);
 	my $page_deleted = ($new_sha1 eq NULL_SHA1);
-	$complete_file_name = mediawiki_clean_filename($complete_file_name);
+	$complete_file_name = clean_filename($complete_file_name);
 
 	my ($title, $extension) = $complete_file_name =~ /^(.*)\.([^\.]*)$/;
 	if (!defined($extension)) {
@@ -1093,7 +1034,7 @@ sub mw_push_file {
 			$file_content = run_git("cat-file blob ${new_sha1}");
 		}
 
-		mw_connect_maybe();
+		$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 
 		my $result = $mediawiki->edit( {
 			action => 'edit',
@@ -1279,7 +1220,7 @@ sub mw_push_revision {
 }
 
 sub get_allowed_file_extensions {
-	mw_connect_maybe();
+	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 
 	my $query = {
 		action => 'query',
@@ -1303,7 +1244,7 @@ my %cached_mw_namespace_id;
 # Return MediaWiki id for a canonical namespace name.
 # Ex.: "File", "Project".
 sub get_mw_namespace_id {
-	mw_connect_maybe();
+	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
 	my $name = shift;
 
 	if (!exists $namespace_id{$name}) {
-- 
1.8.3.GIT

[PATCH v5 4/5] git-remote-mediawiki: Adding git-mw command

[benoit.person]

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

For now, git-remote-mediawiki is only a remote-helper. This patch adds a new
toolset script in which we will be able to build new tools for
git-remote-mediawiki.

This toolset uses a subcommand-mechanism to launch the proper action. For now
only the 'help' subcommand is implemented. It also provides some generic code
for the verbose and help command line options.

Signed-off-by: Benoit Person <benoit.person@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>

---
 contrib/mw-to-git/Makefile    |  7 ++---
 contrib/mw-to-git/git-mw.perl | 60 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+), 3 deletions(-)
 create mode 100755 contrib/mw-to-git/git-mw.perl

diff --git a/contrib/mw-to-git/Makefile b/contrib/mw-to-git/Makefile
index 2a80d56..37afbbf 100644
--- a/contrib/mw-to-git/Makefile
+++ b/contrib/mw-to-git/Makefile
@@ -14,6 +14,7 @@
 
 GIT_MEDIAWIKI_PM=Git/Mediawiki.pm
 SCRIPT_PERL=git-remote-mediawiki.perl
+SCRIPT_PERL+=git-mw.perl
 GIT_ROOT_DIR=../..
 HERE=contrib/mw-to-git/
 
@@ -27,15 +28,15 @@ install_pm:
 	install $(GIT_MEDIAWIKI_PM) $(INSTLIBDIR)/$(GIT_MEDIAWIKI_PM)
 
 build:
-	$(MAKE) -C $(GIT_ROOT_DIR) SCRIPT_PERL=$(SCRIPT_PERL_FULL) \
+	$(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) \
+	$(MAKE) -C $(GIT_ROOT_DIR) SCRIPT_PERL="$(SCRIPT_PERL_FULL)" \
                 install-perl-script
 
 clean:
-	$(MAKE) -C $(GIT_ROOT_DIR) SCRIPT_PERL=$(SCRIPT_PERL_FULL) \
+	$(MAKE) -C $(GIT_ROOT_DIR) SCRIPT_PERL="$(SCRIPT_PERL_FULL)" \
                 clean-perl-script
 	rm $(INSTLIBDIR)/$(GIT_MEDIAWIKI_PM)
 
diff --git a/contrib/mw-to-git/git-mw.perl b/contrib/mw-to-git/git-mw.perl
new file mode 100755
index 0000000..4a3e4a9
--- /dev/null
+++ b/contrib/mw-to-git/git-mw.perl
@@ -0,0 +1,60 @@
+#!/usr/bin/perl
+
+# Copyright (C) 2013
+#     Benoit Person <benoit.person@ensimag.imag.fr>
+#     Celestin Matte <celestin.matte@ensimag.imag.fr>
+# License: GPL v2 or later
+
+# Set of tools for git repo with a mediawiki remote.
+# Documentation & bugtracker: https://github.com/moy/Git-Mediawiki/
+
+use strict;
+use warnings;
+
+use Getopt::Long;
+
+# By default, use UTF-8 to communicate with Git and the user
+binmode STDERR, ':encoding(UTF-8)';
+binmode STDOUT, ':encoding(UTF-8)';
+
+# Global parameters
+my $verbose = 0;
+sub v_print {
+	if ($verbose) {
+		return print {*STDERR} @_;
+	}
+	return;
+}
+
+my %commands = (
+	'help' =>
+		[\&help, {}, \&help]
+);
+
+# Search for sub-command
+my $cmd = $commands{'help'};
+for (0..@ARGV-1) {
+	if (defined $commands{$ARGV[$_]}) {
+		$cmd = $commands{$ARGV[$_]};
+		splice @ARGV, $_, 1;
+		last;
+	}
+};
+GetOptions( %{$cmd->[1]},
+	'help|h' => \&{$cmd->[2]},
+	'verbose|v'  => \$verbose);
+
+# Launch command
+&{$cmd->[0]};
+
+############################## Help Functions ##################################
+
+sub help {
+	print {*STDOUT} <<'END';
+usage: git mw <command> <args>
+
+git mw commands are:
+    help        Display help information about git mw
+END
+	exit;
+}
-- 
1.8.3.GIT

[PATCH v5 5/5] git-remote-mediawiki: Add preview subcommand into git mw.

[benoit.person]

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

In the current state, a user of git-remote-mediawiki can edit the markup text
locally, but has to push to the remote wiki to see how the page is rendererd.
Add a new 'git mw preview' command that allows rendering the markup text on
the remote wiki without actually pushing any change on the wiki.

This uses Mediawiki's API to render the markup and inserts it in an actual
HTML page from the wiki so that CSS can be rendered properly. Most links
should work when the page exists on the remote.

Signed-off-by: Benoit Person <benoit.person@ensimag.fr>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>

---
 contrib/mw-to-git/Git/Mediawiki.pm |   3 +-
 contrib/mw-to-git/git-mw.perl      | 310 ++++++++++++++++++++++++++++++++++++-
 2 files changed, 311 insertions(+), 2 deletions(-)

diff --git a/contrib/mw-to-git/Git/Mediawiki.pm b/contrib/mw-to-git/Git/Mediawiki.pm
index 47fe4f4..d13c4df 100644
--- a/contrib/mw-to-git/Git/Mediawiki.pm
+++ b/contrib/mw-to-git/Git/Mediawiki.pm
@@ -19,7 +19,7 @@ require Exporter;
 
 # Methods which can be called as standalone functions as well:
 @EXPORT_OK = qw(clean_filename smudge_filename connect_maybe
-				EMPTY HTTP_CODE_OK);
+				EMPTY HTTP_CODE_OK HTTP_CODE_PAGE_NOT_FOUND);
 }
 
 # Mediawiki filenames can contain forward slashes. This variable decides by which pattern they should be replaced
@@ -30,6 +30,7 @@ use constant EMPTY => q{};
 
 # HTTP codes
 use constant HTTP_CODE_OK => 200;
+use constant HTTP_CODE_PAGE_NOT_FOUND => 404;
 
 sub clean_filename {
 	my $filename = shift;
diff --git a/contrib/mw-to-git/git-mw.perl b/contrib/mw-to-git/git-mw.perl
index 4a3e4a9..28df3ee 100755
--- a/contrib/mw-to-git/git-mw.perl
+++ b/contrib/mw-to-git/git-mw.perl
@@ -12,6 +12,14 @@ use strict;
 use warnings;
 
 use Getopt::Long;
+use URI::URL qw(url);
+use LWP::UserAgent;
+use HTML::TreeBuilder;
+
+use Git;
+use MediaWiki::API;
+use Git::Mediawiki qw(clean_filename connect_maybe
+					EMPTY HTTP_CODE_PAGE_NOT_FOUND);
 
 # By default, use UTF-8 to communicate with Git and the user
 binmode STDERR, ':encoding(UTF-8)';
@@ -26,9 +34,26 @@ sub v_print {
 	return;
 }
 
+# Preview parameters
+my $file_name = EMPTY;
+my $remote_name = EMPTY;
+my $preview_file_name = EMPTY;
+my $autoload = 0;
+sub file {
+	$file_name = shift;
+	return $file_name;
+}
+
 my %commands = (
 	'help' =>
-		[\&help, {}, \&help]
+		[\&help, {}, \&help],
+	'preview' =>
+		[\&preview, {
+			'<>' => \&file,
+			'output|o=s' => \$preview_file_name,
+			'remote|r=s' => \$remote_name,
+			'autoload|a' => \$autoload
+		}, \&preview_help]
 );
 
 # Search for sub-command
@@ -47,6 +72,288 @@ GetOptions( %{$cmd->[1]},
 # Launch command
 &{$cmd->[0]};
 
+############################# Preview Functions ################################
+
+sub preview_help {
+	print {*STDOUT} <<'END';
+USAGE: git mw preview [--remote|-r <remote name>] [--autoload|-a]
+                      [--output|-o <output filename>] [--verbose|-v]
+                      <blob> | <filename>
+
+DESCRIPTION:
+Preview is an utiliy to preview local content of a mediawiki repo as if it was
+pushed on the remote.
+
+For that, preview searches for the remote name of the current branch's
+upstream if --remote is not set. If that remote is not found or if it
+is not a mediawiki, it lists all mediawiki remotes configured and asks
+you to replay your command with the --remote option set properly.
+
+Then, it searches for a file named 'filename'. If it's not found in
+the current dir, it will assume it's a blob.
+
+The content retrieved in the file (or in the blob) will then be parsed
+by the remote mediawiki and combined with a template retrieved from
+the mediawiki.
+
+Finally, preview will save the HTML result in a file. and autoload it
+in your default web browser if the option --autoload is present.
+
+OPTIONS:
+    -r <remote name>, --remote <remote name>
+        If the remote is a mediawiki, the template and the parse engine
+        used for the preview will be those of that remote.
+        If not, a list of valid remotes will be shown.
+
+    -a, --autoload
+        Try to load the HTML output in a new tab (or new window) of your
+        default web browser.
+
+    -o <output filename>, --output <output filename>
+        Change the HTML output filename. Default filename is based on the
+        input filename with its extension replaced by '.html'.
+
+    -v, --verbose
+        Show more information on what's going on under the hood.
+END
+	exit;
+}
+
+sub preview {
+	my $wiki;
+	my ($remote_url, $wiki_page_name);
+	my ($new_content, $template);
+	my $file_content;
+
+	if ($file_name eq EMPTY) {
+		die "Missing file argument, see `git mw help`\n";
+	}
+
+	v_print("### Selecting remote\n");
+	if ($remote_name eq EMPTY) {
+		$remote_name = find_upstream_remote_name();
+		if ($remote_name) {
+			$remote_url = mediawiki_remote_url_maybe($remote_name);
+		}
+
+		if (! $remote_url) {
+			my @valid_remotes = find_mediawiki_remotes();
+
+			if ($#valid_remotes == 0) {
+				print {*STDERR} "No mediawiki remote in this repo. \n";
+				exit 1;
+			} else {
+				my $remotes_list = join("\n\t", @valid_remotes);
+				print {*STDERR} <<"MESSAGE";
+There are multiple mediawiki remotes, which of:
+	${remotes_list}
+do you want ? Use the -r option to specify the remote.
+MESSAGE
+			}
+
+			exit 1;
+		}
+	} else {
+		if (!is_valid_remote($remote_name)) {
+			die "${remote_name} is not a remote\n";
+		}
+
+		$remote_url = mediawiki_remote_url_maybe($remote_name);
+		if (! $remote_url) {
+			die "${remote_name} is not a mediawiki remote\n";
+		}
+	}
+	v_print("selected remote:\n\tname: ${remote_name}\n\turl: ${remote_url}\n");
+
+	$wiki = connect_maybe($wiki, $remote_name, $remote_url);
+
+	# Read file content
+	if (! -e $file_name) {
+		$file_content = git_cmd_try {
+			Git::command('cat-file', 'blob', $file_name); }
+			"%s failed w/ code %d";
+
+		if ($file_name =~ /(.+):(.+)/) {
+			$file_name = $2;
+		}
+	} else {
+		open my $read_fh, "<", $file_name
+			or die "could not open ${file_name}: $!\n";
+		$file_content = do { local $/ = undef; <$read_fh> };
+		close $read_fh
+			or die "unable to close: $!\n";
+	}
+
+	v_print("### Retrieving template\n");
+	($wiki_page_name = clean_filename($file_name)) =~ s/\.[^.]+$//;
+	$template = get_template($remote_url, $wiki_page_name);
+
+	v_print("### Parsing local content\n");
+	$new_content = $wiki->api({
+		action => 'parse',
+		text => $file_content,
+		title => $wiki_page_name
+	}, {
+		skip_encoding => 1
+	}) or die "No response from remote mediawiki\n";
+	$new_content = $new_content->{'parse'}->{'text'}->{'*'};
+
+	v_print("### Merging contents\n");
+	if ($preview_file_name eq EMPTY) {
+		($preview_file_name = $file_name) =~ s/\.[^.]+$/.html/;
+	}
+	open(my $save_fh, '>:encoding(UTF-8)', $preview_file_name)
+		or die "Could not open: $!\n";
+	print {$save_fh} merge_contents($template, $new_content, $remote_url);
+	close($save_fh)
+		or die "Could not close: $!\n";
+
+	v_print("### Results\n");
+	if ($autoload) {
+		v_print("Launching browser w/ file: ${preview_file_name}");
+		system('git', 'web--browse', $preview_file_name);
+	} else {
+		print {*STDERR} "Preview file saved as: ${preview_file_name}\n";
+	}
+
+	exit;
+}
+
+# uses global scope variable: $remote_name
+sub merge_contents {
+	my $template = shift;
+	my $content = shift;
+	my $remote_url = shift;
+	my ($content_tree, $html_tree, $mw_content_text);
+	my $template_content_id = 'bodyContent';
+
+	$html_tree = HTML::TreeBuilder->new;
+	$html_tree->parse($template);
+
+	$content_tree = HTML::TreeBuilder->new;
+	$content_tree->parse($content);
+
+	$template_content_id = Git::config("remote.${remote_name}.mwIDcontent")
+		|| $template_content_id;
+	v_print("Using '${template_content_id}' as the content ID\n");
+
+	$mw_content_text = $html_tree->look_down('id', $template_content_id);
+	if (!defined $mw_content_text) {
+		print {*STDERR} <<"CONFIG";
+Could not combine the new content with the template. You might want to
+configure `mediawiki.IDContent` in your config:
+	git config --add remote.${remote_name}.mwIDcontent <id>
+and re-run the command afterward.
+CONFIG
+		exit 1;
+	}
+	$mw_content_text->delete_content();
+	$mw_content_text->push_content($content_tree);
+
+	make_links_absolute($html_tree, $remote_url);
+
+	return $html_tree->as_HTML;
+}
+
+sub make_links_absolute {
+	my $html_tree = shift;
+	my $remote_url = shift;
+	for (@{ $html_tree->extract_links() }) {
+		my ($link, $element, $attr) = @{ $_ };
+		my $url = url($link)->canonical;
+		if ($url !~ /#/) {
+			$element->attr($attr, URI->new_abs($url, $remote_url));
+		}
+	}
+	return $html_tree;
+}
+
+sub is_valid_remote {
+	my $remote = shift;
+	my @remotes = git_cmd_try {
+		Git::command('remote') }
+		"%s failed w/ code %d";
+	my $found_remote = 0;
+	foreach my $remote (@remotes) {
+		if ($remote eq $remote) {
+			$found_remote = 1;
+			last;
+		}
+	}
+	return $found_remote;
+}
+
+sub find_mediawiki_remotes {
+	my @remotes = git_cmd_try {
+		Git::command('remote'); }
+		"%s failed w/ code %d";
+	my $remote_url;
+	my @valid_remotes = ();
+	foreach my $remote (@remotes) {
+		$remote_url = mediawiki_remote_url_maybe($remote);
+		if ($remote_url) {
+			push(@valid_remotes, $remote);
+		}
+	}
+	return @valid_remotes;
+}
+
+sub find_upstream_remote_name {
+	my $current_branch = git_cmd_try {
+		Git::command_oneline('symbolic-ref', '--short', 'HEAD') }
+		"%s failed w/ code %d";
+	return Git::config("branch.${current_branch}.remote");
+}
+
+sub mediawiki_remote_url_maybe {
+	my $remote = shift;
+
+	# Find remote url
+	my $remote_url = Git::config("remote.${remote}.url");
+	if ($remote_url =~ s/mediawiki::(.*)/$1/) {
+		return url($remote_url)->canonical;
+	}
+
+	return;
+}
+
+sub get_template {
+	my $url = shift;
+	my $page_name = shift;
+	my ($req, $res, $code, $url_after);
+
+	$req = LWP::UserAgent->new;
+	if ($verbose) {
+		$req->show_progress(1);
+	}
+
+	$res = $req->get("${url}/index.php?title=${page_name}");
+	if (!$res->is_success) {
+		$code = $res->code;
+		$url_after = $res->request()->uri(); # resolve all redirections
+		if ($code == HTTP_CODE_PAGE_NOT_FOUND) {
+			if ($verbose) {
+				print {*STDERR} <<"WARNING";
+Warning: Failed to retrieve '$page_name'. Create it on the mediawiki if you want
+all the links to work properly.
+Trying to use the mediawiki homepage as a fallback template ...
+WARNING
+			}
+
+			# LWP automatically redirects GET request
+			$res = $req->get("${url}/index.php");
+			if (!$res->is_success) {
+				$url_after = $res->request()->uri(); # resolve all redirections
+				die "Failed to get homepage @ ${url_after} w/ code ${code}\n";
+			}
+		} else {
+			die "Failed to get '${page_name}' @ ${url_after} w/ code ${code}\n";
+		}
+	}
+
+	return $res->decoded_content;
+}
+
 ############################## Help Functions ##################################
 
 sub help {
@@ -55,6 +362,7 @@ usage: git mw <command> <args>
 
 git mw commands are:
     help        Display help information about git mw
+    preview     Parse and render local file into HTML
 END
 	exit;
 }
-- 
1.8.3.GIT

Re: [PATCH v5 5/5] git-remote-mediawiki: Add preview subcommand into git mw.

[Matthieu Moy]

benoit.person@ensimag.fr writes:

> +do you want ? Use the -r option to specify the remote.

Not that it really matters, but there should be no space before ? in
English (although there is in French).

(Shouldn't prevent merging)

Other than that, the series looks good to me. Good work splitting
patches 1 to 4, the history looks much nicer now.

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/

Re: [PATCH v5 5/5] git-remote-mediawiki: Add preview subcommand into git mw.

[Junio C Hamano]

Matthieu Moy <Matthieu.Moy@grenoble-inp.fr> writes:

> benoit.person@ensimag.fr writes:
>
>> +do you want ? Use the -r option to specify the remote.
>
> Not that it really matters, but there should be no space before ? in
> English (although there is in French).
>
> (Shouldn't prevent merging)
>
> Other than that, the series looks good to me. Good work splitting
> patches 1 to 4, the history looks much nicer now.

Thanks; queued.