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-rwxr-xr-xthird_party/git/contrib/mw-to-git/git-remote-mediawiki.perl1390
1 files changed, 0 insertions, 1390 deletions
diff --git a/third_party/git/contrib/mw-to-git/git-remote-mediawiki.perl b/third_party/git/contrib/mw-to-git/git-remote-mediawiki.perl
deleted file mode 100755
index a5624413dc11..000000000000
--- a/third_party/git/contrib/mw-to-git/git-remote-mediawiki.perl
+++ /dev/null
@@ -1,1390 +0,0 @@
-#! /usr/bin/perl
-
-# Copyright (C) 2011
-#     Jérémie Nikaes <jeremie.nikaes@ensimag.imag.fr>
-#     Arnaud Lacurie <arnaud.lacurie@ensimag.imag.fr>
-#     Claire Fousse <claire.fousse@ensimag.imag.fr>
-#     David Amouyal <david.amouyal@ensimag.imag.fr>
-#     Matthieu Moy <matthieu.moy@grenoble-inp.fr>
-# License: GPL v2 or later
-
-# Gateway between Git and MediaWiki.
-# Documentation & bugtracker: https://github.com/Git-Mediawiki/Git-Mediawiki
-
-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;
-
-# By default, use UTF-8 to communicate with Git and the user
-binmode STDERR, ':encoding(UTF-8)';
-binmode STDOUT, ':encoding(UTF-8)';
-
-use URI::Escape;
-
-# 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";
-
-# It's not possible to create empty pages. New empty files in Git are
-# sent with this content instead.
-use constant EMPTY_CONTENT => "<!-- empty page -->\n";
-
-# used to reflect file creation or deletion in diff.
-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*';
-
-# Number of pages taken into account at once in submodule get_mw_page_list
-use constant SLICE_SIZE => 50;
-
-# Number of linked mediafile to get at once in get_linked_mediafiles
-# The query is split in small batches because of the MW API limit of
-# the number of links to be returned (500 links max).
-use constant BATCH_SIZE => 10;
-
-if (@ARGV != 2) {
-	exit_error_usage();
-}
-
-my $remotename = $ARGV[0];
-my $url = $ARGV[1];
-
-# Accept both space-separated and multiple keys in config file.
-# Spaces should be written as _ anyway because we'll use chomp.
-my @tracked_pages = split(/[ \n]/, run_git_quoted(["config", "--get-all", "remote.${remotename}.pages"]));
-chomp(@tracked_pages);
-
-# Just like @tracked_pages, but for MediaWiki categories.
-my @tracked_categories = split(/[ \n]/, run_git_quoted(["config", "--get-all", "remote.${remotename}.categories"]));
-chomp(@tracked_categories);
-
-# Just like @tracked_categories, but for MediaWiki namespaces.
-my @tracked_namespaces = split(/[ \n]/, run_git_quoted(["config", "--get-all", "remote.${remotename}.namespaces"]));
-for (@tracked_namespaces) { s/_/ /g; }
-chomp(@tracked_namespaces);
-
-# Import media files on pull
-my $import_media = run_git_quoted(["config", "--get", "--bool", "remote.${remotename}.mediaimport"]);
-chomp($import_media);
-$import_media = ($import_media eq 'true');
-
-# Export media files on push
-my $export_media = run_git_quoted(["config", "--get", "--bool", "remote.${remotename}.mediaexport"]);
-chomp($export_media);
-$export_media = !($export_media eq 'false');
-
-my $wiki_login = run_git_quoted(["config", "--get", "remote.${remotename}.mwLogin"]);
-# Note: mwPassword is discouraged. Use the credential system instead.
-my $wiki_passwd = run_git_quoted(["config", "--get", "remote.${remotename}.mwPassword"]);
-my $wiki_domain = run_git_quoted(["config", "--get", "remote.${remotename}.mwDomain"]);
-chomp($wiki_login);
-chomp($wiki_passwd);
-chomp($wiki_domain);
-
-# Import only last revisions (both for clone and fetch)
-my $shallow_import = run_git_quoted(["config", "--get", "--bool", "remote.${remotename}.shallow"]);
-chomp($shallow_import);
-$shallow_import = ($shallow_import eq 'true');
-
-# Fetch (clone and pull) by revisions instead of by pages. This behavior
-# is more efficient when we have a wiki with lots of pages and we fetch
-# the revisions quite often so that they concern only few pages.
-# Possible values:
-# - by_rev: perform one query per new revision on the remote wiki
-# - by_page: query each tracked page for new revision
-my $fetch_strategy = run_git_quoted(["config", "--get", "remote.${remotename}.fetchStrategy"]);
-if (!$fetch_strategy) {
-	$fetch_strategy = run_git_quoted(["config", "--get", "mediawiki.fetchStrategy"]);
-}
-chomp($fetch_strategy);
-if (!$fetch_strategy) {
-	$fetch_strategy = 'by_page';
-}
-
-# Remember the timestamp corresponding to a revision id.
-my %basetimestamps;
-
-# Dumb push: don't update notes and mediawiki ref to reflect the last push.
-#
-# Configurable with mediawiki.dumbPush, or per-remote with
-# remote.<remotename>.dumbPush.
-#
-# This means the user will have to re-import the just-pushed
-# revisions. On the other hand, this means that the Git revisions
-# corresponding to MediaWiki revisions are all imported from the wiki,
-# regardless of whether they were initially created in Git or from the
-# web interface, hence all users will get the same history (i.e. if
-# the push from Git to MediaWiki loses some information, everybody
-# will get the history with information lost). If the import is
-# deterministic, this means everybody gets the same sha1 for each
-# MediaWiki revision.
-my $dumb_push = run_git_quoted(["config", "--get", "--bool", "remote.${remotename}.dumbPush"]);
-if (!$dumb_push) {
-	$dumb_push = run_git_quoted(["config", "--get", "--bool", "mediawiki.dumbPush"]);
-}
-chomp($dumb_push);
-$dumb_push = ($dumb_push eq 'true');
-
-my $wiki_name = $url;
-$wiki_name =~ s{[^/]*://}{};
-# If URL is like http://user:password@example.com/, we clearly don't
-# want the password in $wiki_name. While we're there, also remove user
-# and '@' sign, to avoid author like MWUser@HTTPUser@host.com
-$wiki_name =~ s/^.*@//;
-
-# Commands parser
-while (<STDIN>) {
-	chomp;
-
-	if (!parse_command($_)) {
-		last;
-	}
-
-	BEGIN { $| = 1 } # flush STDOUT, to make sure the previous
-			 # command is fully processed.
-}
-
-########################## Functions ##############################
-
-## error handling
-sub exit_error_usage {
-	die "ERROR: git-remote-mediawiki module was not called with a correct number of\n" .
-	    "parameters\n" .
-	    "You may obtain this error because you attempted to run the git-remote-mediawiki\n" .
-            "module directly.\n" .
-	    "This module can be used the following way:\n" .
-	    "\tgit clone mediawiki://<address of a mediawiki>\n" .
-	    "Then, use git commit, push and pull as with every normal git repository.\n";
-}
-
-sub parse_command {
-	my ($line) = @_;
-	my @cmd = split(/ /, $line);
-	if (!defined $cmd[0]) {
-		return 0;
-	}
-	if ($cmd[0] eq 'capabilities') {
-		die("Too many arguments for capabilities\n")
-		    if (defined($cmd[1]));
-		mw_capabilities();
-	} elsif ($cmd[0] eq 'list') {
-		die("Too many arguments for list\n") if (defined($cmd[2]));
-		mw_list($cmd[1]);
-	} elsif ($cmd[0] eq 'import') {
-		die("Invalid argument for import\n")
-		    if ($cmd[1] eq EMPTY);
-		die("Too many arguments for import\n")
-		    if (defined($cmd[2]));
-		mw_import($cmd[1]);
-	} elsif ($cmd[0] eq 'option') {
-		die("Invalid arguments for option\n")
-		    if ($cmd[1] eq EMPTY || $cmd[2] eq EMPTY);
-		die("Too many arguments for option\n")
-		    if (defined($cmd[3]));
-		mw_option($cmd[1],$cmd[2]);
-	} elsif ($cmd[0] eq 'push') {
-		mw_push($cmd[1]);
-	} else {
-		print {*STDERR} "Unknown command. Aborting...\n";
-		return 0;
-	}
-	return 1;
-}
-
-# MediaWiki API instance, created lazily.
-my $mediawiki;
-
-sub fatal_mw_error {
-	my $action = shift;
-	print STDERR "fatal: could not $action.\n";
-	print STDERR "fatal: '$url' does not appear to be a mediawiki\n";
-	if ($url =~ /^https/) {
-		print STDERR "fatal: make sure '$url/api.php' is a valid page\n";
-		print STDERR "fatal: and the SSL certificate is correct.\n";
-	} else {
-		print STDERR "fatal: make sure '$url/api.php' is a valid page.\n";
-	}
-	print STDERR "fatal: (error " .
-	    $mediawiki->{error}->{code} . ': ' .
-	    $mediawiki->{error}->{details} . ")\n";
-	exit 1;
-}
-
-## Functions for listing pages on the remote wiki
-sub get_mw_tracked_pages {
-	my $pages = shift;
-	get_mw_page_list(\@tracked_pages, $pages);
-	return;
-}
-
-sub get_mw_page_list {
-	my $page_list = shift;
-	my $pages = shift;
-	my @some_pages = @{$page_list};
-	while (@some_pages) {
-		my $last_page = SLICE_SIZE;
-		if ($#some_pages < $last_page) {
-			$last_page = $#some_pages;
-		}
-		my @slice = @some_pages[0..$last_page];
-		get_mw_first_pages(\@slice, $pages);
-		@some_pages = @some_pages[(SLICE_SIZE + 1)..$#some_pages];
-	}
-	return;
-}
-
-sub get_mw_tracked_categories {
-	my $pages = shift;
-	foreach my $category (@tracked_categories) {
-		if (index($category, ':') < 0) {
-			# Mediawiki requires the Category
-			# prefix, but let's not force the user
-			# to specify it.
-			$category = "Category:${category}";
-		}
-		my $mw_pages = $mediawiki->list( {
-			action => 'query',
-			list => 'categorymembers',
-			cmtitle => $category,
-			cmlimit => 'max' } )
-			|| die $mediawiki->{error}->{code} . ': '
-				. $mediawiki->{error}->{details} . "\n";
-		foreach my $page (@{$mw_pages}) {
-			$pages->{$page->{title}} = $page;
-		}
-	}
-	return;
-}
-
-sub get_mw_tracked_namespaces {
-    my $pages = shift;
-    foreach my $local_namespace (sort @tracked_namespaces) {
-        my $namespace_id;
-        if ($local_namespace eq "(Main)") {
-            $namespace_id = 0;
-        } else {
-            $namespace_id = get_mw_namespace_id($local_namespace);
-        }
-        # virtual namespaces don't support allpages
-        next if !defined($namespace_id) || $namespace_id < 0;
-        my $mw_pages = $mediawiki->list( {
-            action => 'query',
-            list => 'allpages',
-            apnamespace => $namespace_id,
-            aplimit => 'max' } )
-            || die $mediawiki->{error}->{code} . ': '
-                . $mediawiki->{error}->{details} . "\n";
-        print {*STDERR} "$#{$mw_pages} found in namespace $local_namespace ($namespace_id)\n";
-        foreach my $page (@{$mw_pages}) {
-            $pages->{$page->{title}} = $page;
-        }
-    }
-    return;
-}
-
-sub get_mw_all_pages {
-	my $pages = shift;
-	# No user-provided list, get the list of pages from the API.
-	my $mw_pages = $mediawiki->list({
-		action => 'query',
-		list => 'allpages',
-		aplimit => 'max'
-	});
-	if (!defined($mw_pages)) {
-		fatal_mw_error("get the list of wiki pages");
-	}
-	foreach my $page (@{$mw_pages}) {
-		$pages->{$page->{title}} = $page;
-	}
-	return;
-}
-
-# queries the wiki for a set of pages. Meant to be used within a loop
-# querying the wiki for slices of page list.
-sub get_mw_first_pages {
-	my $some_pages = shift;
-	my @some_pages = @{$some_pages};
-
-	my $pages = shift;
-
-	# pattern 'page1|page2|...' required by the API
-	my $titles = join('|', @some_pages);
-
-	my $mw_pages = $mediawiki->api({
-		action => 'query',
-		titles => $titles,
-	});
-	if (!defined($mw_pages)) {
-		fatal_mw_error("query the list of wiki pages");
-	}
-	while (my ($id, $page) = each(%{$mw_pages->{query}->{pages}})) {
-		if ($id < 0) {
-			print {*STDERR} "Warning: page $page->{title} not found on wiki\n";
-		} else {
-			$pages->{$page->{title}} = $page;
-		}
-	}
-	return;
-}
-
-# Get the list of pages to be fetched according to configuration.
-sub get_mw_pages {
-	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-
-	print {*STDERR} "Listing pages on remote wiki...\n";
-
-	my %pages; # hash on page titles to avoid duplicates
-	my $user_defined;
-	if (@tracked_pages) {
-		$user_defined = 1;
-		# The user provided a list of pages titles, but we
-		# still need to query the API to get the page IDs.
-		get_mw_tracked_pages(\%pages);
-	}
-	if (@tracked_categories) {
-		$user_defined = 1;
-		get_mw_tracked_categories(\%pages);
-	}
-	if (@tracked_namespaces) {
-		$user_defined = 1;
-		get_mw_tracked_namespaces(\%pages);
-	}
-	if (!$user_defined) {
-		get_mw_all_pages(\%pages);
-	}
-	if ($import_media) {
-		print {*STDERR} "Getting media files for selected pages...\n";
-		if ($user_defined) {
-			get_linked_mediafiles(\%pages);
-		} else {
-			get_all_mediafiles(\%pages);
-		}
-	}
-	print {*STDERR} (scalar keys %pages) . " pages found.\n";
-	return %pages;
-}
-
-# usage: $out = run_git_quoted(["command", "args", ...]);
-#        $out = run_git_quoted(["command", "args", ...], "raw"); # don't interpret output as UTF-8.
-#        $out = run_git_quoted_nostderr(["command", "args", ...]); # discard stderr
-#        $out = run_git_quoted_nostderr(["command", "args", ...], "raw"); # ditto but raw instead of UTF-8 as above
-sub _run_git {
-	my $args = shift;
-	my $encoding = (shift || 'encoding(UTF-8)');
-	open(my $git, "-|:${encoding}", @$args)
-	    or die "Unable to fork: $!\n";
-	my $res = do {
-		local $/ = undef;
-		<$git>
-	};
-	close($git);
-
-	return $res;
-}
-
-sub run_git_quoted {
-    _run_git(["git", @{$_[0]}], $_[1]);
-}
-
-sub run_git_quoted_nostderr {
-    _run_git(['sh', '-c', 'git "$@" 2>/dev/null', '--', @{$_[0]}], $_[1]);
-}
-
-sub get_all_mediafiles {
-	my $pages = shift;
-	# Attach list of all pages for media files from the API,
-	# they are in a different namespace, only one namespace
-	# can be queried at the same moment
-	my $mw_pages = $mediawiki->list({
-		action => 'query',
-		list => 'allpages',
-		apnamespace => get_mw_namespace_id('File'),
-		aplimit => 'max'
-	});
-	if (!defined($mw_pages)) {
-		print {*STDERR} "fatal: could not get the list of pages for media files.\n";
-		print {*STDERR} "fatal: '$url' does not appear to be a mediawiki\n";
-		print {*STDERR} "fatal: make sure '$url/api.php' is a valid page.\n";
-		exit 1;
-	}
-	foreach my $page (@{$mw_pages}) {
-		$pages->{$page->{title}} = $page;
-	}
-	return;
-}
-
-sub get_linked_mediafiles {
-	my $pages = shift;
-	my @titles = map { $_->{title} } values(%{$pages});
-
-	my $batch = BATCH_SIZE;
-	while (@titles) {
-		if ($#titles < $batch) {
-			$batch = $#titles;
-		}
-		my @slice = @titles[0..$batch];
-
-		# pattern 'page1|page2|...' required by the API
-		my $mw_titles = join('|', @slice);
-
-		# Media files could be included or linked from
-		# a page, get all related
-		my $query = {
-			action => 'query',
-			prop => 'links|images',
-			titles => $mw_titles,
-			plnamespace => get_mw_namespace_id('File'),
-			pllimit => 'max'
-		};
-		my $result = $mediawiki->api($query);
-
-		while (my ($id, $page) = each(%{$result->{query}->{pages}})) {
-			my @media_titles;
-			if (defined($page->{links})) {
-				my @link_titles
-				    = map { $_->{title} } @{$page->{links}};
-				push(@media_titles, @link_titles);
-			}
-			if (defined($page->{images})) {
-				my @image_titles
-				    = map { $_->{title} } @{$page->{images}};
-				push(@media_titles, @image_titles);
-			}
-			if (@media_titles) {
-				get_mw_page_list(\@media_titles, $pages);
-			}
-		}
-
-		@titles = @titles[($batch+1)..$#titles];
-	}
-	return;
-}
-
-sub get_mw_mediafile_for_page_revision {
-	# Name of the file on Wiki, with the prefix.
-	my $filename = shift;
-	my $timestamp = shift;
-	my %mediafile;
-
-	# Search if on a media file with given timestamp exists on
-	# MediaWiki. In that case download the file.
-	my $query = {
-		action => 'query',
-		prop => 'imageinfo',
-		titles => "File:${filename}",
-		iistart => $timestamp,
-		iiend => $timestamp,
-		iiprop => 'timestamp|archivename|url',
-		iilimit => 1
-	};
-	my $result = $mediawiki->api($query);
-
-	my ($fileid, $file) = each( %{$result->{query}->{pages}} );
-	# If not defined it means there is no revision of the file for
-	# given timestamp.
-	if (defined($file->{imageinfo})) {
-		$mediafile{title} = $filename;
-
-		my $fileinfo = pop(@{$file->{imageinfo}});
-		$mediafile{timestamp} = $fileinfo->{timestamp};
-		# Mediawiki::API's download function doesn't support https URLs
-		# and can't download old versions of files.
-		print {*STDERR} "\tDownloading file $mediafile{title}, version $mediafile{timestamp}\n";
-		$mediafile{content} = download_mw_mediafile($fileinfo->{url});
-	}
-	return %mediafile;
-}
-
-sub download_mw_mediafile {
-	my $download_url = shift;
-
-	my $response = $mediawiki->{ua}->get($download_url);
-	if ($response->code == HTTP_CODE_OK) {
-		# It is tempting to return
-		# $response->decoded_content({charset => "none"}), but
-		# when doing so, utf8::downgrade($content) fails with
-		# "Wide character in subroutine entry".
-		$response->decode();
-		return $response->content();
-	} else {
-		print {*STDERR} "Error downloading mediafile from :\n";
-		print {*STDERR} "URL: ${download_url}\n";
-		print {*STDERR} 'Server response: ' . $response->code . q{ } . $response->message . "\n";
-		exit 1;
-	}
-}
-
-sub get_last_local_revision {
-	# Get note regarding last mediawiki revision.
-	my $note = run_git_quoted_nostderr(["notes", "--ref=${remotename}/mediawiki",
-					    "show", "refs/mediawiki/${remotename}/master"]);
-	my @note_info = split(/ /, $note);
-
-	my $lastrevision_number;
-	if (!(defined($note_info[0]) && $note_info[0] eq 'mediawiki_revision:')) {
-		print {*STDERR} 'No previous mediawiki revision found';
-		$lastrevision_number = 0;
-	} else {
-		# Notes are formatted : mediawiki_revision: #number
-		$lastrevision_number = $note_info[1];
-		chomp($lastrevision_number);
-		print {*STDERR} "Last local mediawiki revision found is ${lastrevision_number}";
-	}
-	return $lastrevision_number;
-}
-
-# Get the last remote revision without taking in account which pages are
-# tracked or not. This function makes a single request to the wiki thus
-# avoid a loop onto all tracked pages. This is useful for the fetch-by-rev
-# option.
-sub get_last_global_remote_rev {
-	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-
-	my $query = {
-		action => 'query',
-		list => 'recentchanges',
-		prop => 'revisions',
-		rclimit => '1',
-		rcdir => 'older',
-	};
-	my $result = $mediawiki->api($query);
-	return $result->{query}->{recentchanges}[0]->{revid};
-}
-
-# Get the last remote revision concerning the tracked pages and the tracked
-# categories.
-sub get_last_remote_revision {
-	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-
-	my %pages_hash = get_mw_pages();
-	my @pages = values(%pages_hash);
-
-	my $max_rev_num = 0;
-
-	print {*STDERR} "Getting last revision id on tracked pages...\n";
-
-	foreach my $page (@pages) {
-		my $id = $page->{pageid};
-
-		my $query = {
-			action => 'query',
-			prop => 'revisions',
-			rvprop => 'ids|timestamp',
-			pageids => $id,
-		};
-
-		my $result = $mediawiki->api($query);
-
-		my $lastrev = pop(@{$result->{query}->{pages}->{$id}->{revisions}});
-
-		$basetimestamps{$lastrev->{revid}} = $lastrev->{timestamp};
-
-		$max_rev_num = ($lastrev->{revid} > $max_rev_num ? $lastrev->{revid} : $max_rev_num);
-	}
-
-	print {*STDERR} "Last remote revision found is $max_rev_num.\n";
-	return $max_rev_num;
-}
-
-# Clean content before sending it to MediaWiki
-sub mediawiki_clean {
-	my $string = shift;
-	my $page_created = shift;
-	# Mediawiki does not allow blank space at the end of a page and ends with a single \n.
-	# This function right trims a string and adds a \n at the end to follow this rule
-	$string =~ s/\s+$//;
-	if ($string eq EMPTY && $page_created) {
-		# Creating empty pages is forbidden.
-		$string = EMPTY_CONTENT;
-	}
-	return $string."\n";
-}
-
-# Filter applied on MediaWiki data before adding them to Git
-sub mediawiki_smudge {
-	my $string = shift;
-	if ($string eq EMPTY_CONTENT) {
-		$string = EMPTY;
-	}
-	# This \n is important. This is due to mediawiki's way to handle end of files.
-	return "${string}\n";
-}
-
-sub literal_data {
-	my ($content) = @_;
-	print {*STDOUT} 'data ', bytes::length($content), "\n", $content;
-	return;
-}
-
-sub literal_data_raw {
-	# Output possibly binary content.
-	my ($content) = @_;
-	# Avoid confusion between size in bytes and in characters
-	utf8::downgrade($content);
-	binmode STDOUT, ':raw';
-	print {*STDOUT} 'data ', bytes::length($content), "\n", $content;
-	binmode STDOUT, ':encoding(UTF-8)';
-	return;
-}
-
-sub mw_capabilities {
-	# Revisions are imported to the private namespace
-	# refs/mediawiki/$remotename/ by the helper and fetched into
-	# refs/remotes/$remotename later by fetch.
-	print {*STDOUT} "refspec refs/heads/*:refs/mediawiki/${remotename}/*\n";
-	print {*STDOUT} "import\n";
-	print {*STDOUT} "list\n";
-	print {*STDOUT} "push\n";
-	if ($dumb_push) {
-		print {*STDOUT} "no-private-update\n";
-	}
-	print {*STDOUT} "\n";
-	return;
-}
-
-sub mw_list {
-	# MediaWiki do not have branches, we consider one branch arbitrarily
-	# called master, and HEAD pointing to it.
-	print {*STDOUT} "? refs/heads/master\n";
-	print {*STDOUT} "\@refs/heads/master HEAD\n";
-	print {*STDOUT} "\n";
-	return;
-}
-
-sub mw_option {
-	print {*STDERR} "remote-helper command 'option $_[0]' not yet implemented\n";
-	print {*STDOUT} "unsupported\n";
-	return;
-}
-
-sub fetch_mw_revisions_for_page {
-	my $page = shift;
-	my $id = shift;
-	my $fetch_from = shift;
-	my @page_revs = ();
-	my $query = {
-		action => 'query',
-		prop => 'revisions',
-		rvprop => 'ids',
-		rvdir => 'newer',
-		rvstartid => $fetch_from,
-		rvlimit => 500,
-		pageids => $id,
-
-		# Let MediaWiki know that we support the latest API.
-		continue => '',
-	};
-
-	my $revnum = 0;
-	# Get 500 revisions at a time due to the mediawiki api limit
-	while (1) {
-		my $result = $mediawiki->api($query);
-
-		# Parse each of those 500 revisions
-		foreach my $revision (@{$result->{query}->{pages}->{$id}->{revisions}}) {
-			my $page_rev_ids;
-			$page_rev_ids->{pageid} = $page->{pageid};
-			$page_rev_ids->{revid} = $revision->{revid};
-			push(@page_revs, $page_rev_ids);
-			$revnum++;
-		}
-
-		if ($result->{'query-continue'}) { # For legacy APIs
-			$query->{rvstartid} = $result->{'query-continue'}->{revisions}->{rvstartid};
-		} elsif ($result->{continue}) { # For newer APIs
-			$query->{rvstartid} = $result->{continue}->{rvcontinue};
-			$query->{continue} = $result->{continue}->{continue};
-		} else {
-			last;
-		}
-	}
-	if ($shallow_import && @page_revs) {
-		print {*STDERR} "  Found 1 revision (shallow import).\n";
-		@page_revs = sort {$b->{revid} <=> $a->{revid}} (@page_revs);
-		return $page_revs[0];
-	}
-	print {*STDERR} "  Found ${revnum} revision(s).\n";
-	return @page_revs;
-}
-
-sub fetch_mw_revisions {
-	my $pages = shift; my @pages = @{$pages};
-	my $fetch_from = shift;
-
-	my @revisions = ();
-	my $n = 1;
-	foreach my $page (@pages) {
-		my $id = $page->{pageid};
-		print {*STDERR} "page ${n}/", scalar(@pages), ': ', $page->{title}, "\n";
-		$n++;
-		my @page_revs = fetch_mw_revisions_for_page($page, $id, $fetch_from);
-		@revisions = (@page_revs, @revisions);
-	}
-
-	return ($n, @revisions);
-}
-
-sub fe_escape_path {
-    my $path = shift;
-    $path =~ s/\\/\\\\/g;
-    $path =~ s/"/\\"/g;
-    $path =~ s/\n/\\n/g;
-    return qq("${path}");
-}
-
-sub import_file_revision {
-	my $commit = shift;
-	my %commit = %{$commit};
-	my $full_import = shift;
-	my $n = shift;
-	my $mediafile = shift;
-	my %mediafile;
-	if ($mediafile) {
-		%mediafile = %{$mediafile};
-	}
-
-	my $title = $commit{title};
-	my $comment = $commit{comment};
-	my $content = $commit{content};
-	my $author = $commit{author};
-	my $date = $commit{date};
-
-	print {*STDOUT} "commit refs/mediawiki/${remotename}/master\n";
-	print {*STDOUT} "mark :${n}\n";
-	print {*STDOUT} "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
-	literal_data($comment);
-
-	# If it's not a clone, we need to know where to start from
-	if (!$full_import && $n == 1) {
-		print {*STDOUT} "from refs/mediawiki/${remotename}/master^0\n";
-	}
-	if ($content ne DELETED_CONTENT) {
-		print {*STDOUT} 'M 644 inline ' .
-		    fe_escape_path("${title}.mw") . "\n";
-		literal_data($content);
-		if (%mediafile) {
-			print {*STDOUT} 'M 644 inline '
-			    . fe_escape_path($mediafile{title}) . "\n";
-			literal_data_raw($mediafile{content});
-		}
-		print {*STDOUT} "\n\n";
-	} else {
-		print {*STDOUT} 'D ' . fe_escape_path("${title}.mw") . "\n";
-	}
-
-	# mediawiki revision number in the git note
-	if ($full_import && $n == 1) {
-		print {*STDOUT} "reset refs/notes/${remotename}/mediawiki\n";
-	}
-	print {*STDOUT} "commit refs/notes/${remotename}/mediawiki\n";
-	print {*STDOUT} "committer ${author} <${author}\@${wiki_name}> " . $date->epoch . " +0000\n";
-	literal_data('Note added by git-mediawiki during import');
-	if (!$full_import && $n == 1) {
-		print {*STDOUT} "from refs/notes/${remotename}/mediawiki^0\n";
-	}
-	print {*STDOUT} "N inline :${n}\n";
-	literal_data("mediawiki_revision: $commit{mw_revision}");
-	print {*STDOUT} "\n\n";
-	return;
-}
-
-# parse a sequence of
-# <cmd> <arg1>
-# <cmd> <arg2>
-# \n
-# (like batch sequence of import and sequence of push statements)
-sub get_more_refs {
-	my $cmd = shift;
-	my @refs;
-	while (1) {
-		my $line = <STDIN>;
-		if ($line =~ /^$cmd (.*)$/) {
-			push(@refs, $1);
-		} elsif ($line eq "\n") {
-			return @refs;
-		} else {
-			die("Invalid command in a '$cmd' batch: $_\n");
-		}
-	}
-	return;
-}
-
-sub mw_import {
-	# multiple import commands can follow each other.
-	my @refs = (shift, get_more_refs('import'));
-	my $processedRefs;
-	foreach my $ref (@refs) {
-		next if $processedRefs->{$ref}; # skip duplicates: "import refs/heads/master" being issued twice; TODO: why?
-		$processedRefs->{$ref} = 1;
-		mw_import_ref($ref);
-	}
-	print {*STDOUT} "done\n";
-	return;
-}
-
-sub mw_import_ref {
-	my $ref = shift;
-	# The remote helper will call "import HEAD" and
-	# "import refs/heads/master".
-	# Since HEAD is a symbolic ref to master (by convention,
-	# followed by the output of the command "list" that we gave),
-	# we don't need to do anything in this case.
-	if ($ref eq 'HEAD') {
-		return;
-	}
-
-	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-
-	print {*STDERR} "Searching revisions...\n";
-	my $last_local = get_last_local_revision();
-	my $fetch_from = $last_local + 1;
-	if ($fetch_from == 1) {
-		print {*STDERR} ", fetching from beginning.\n";
-	} else {
-		print {*STDERR} ", fetching from here.\n";
-	}
-
-	my $n = 0;
-	if ($fetch_strategy eq 'by_rev') {
-		print {*STDERR} "Fetching & writing export data by revs...\n";
-		$n = mw_import_ref_by_revs($fetch_from);
-	} elsif ($fetch_strategy eq 'by_page') {
-		print {*STDERR} "Fetching & writing export data by pages...\n";
-		$n = mw_import_ref_by_pages($fetch_from);
-	} else {
-		print {*STDERR} qq(fatal: invalid fetch strategy "${fetch_strategy}".\n);
-		print {*STDERR} "Check your configuration variables remote.${remotename}.fetchStrategy and mediawiki.fetchStrategy\n";
-		exit 1;
-	}
-
-	if ($fetch_from == 1 && $n == 0) {
-		print {*STDERR} "You appear to have cloned an empty MediaWiki.\n";
-		# Something has to be done remote-helper side. If nothing is done, an error is
-		# thrown saying that HEAD is referring to unknown object 0000000000000000000
-		# and the clone fails.
-	}
-	return;
-}
-
-sub mw_import_ref_by_pages {
-
-	my $fetch_from = shift;
-	my %pages_hash = get_mw_pages();
-	my @pages = values(%pages_hash);
-
-	my ($n, @revisions) = fetch_mw_revisions(\@pages, $fetch_from);
-
-	@revisions = sort {$a->{revid} <=> $b->{revid}} @revisions;
-	my @revision_ids = map { $_->{revid} } @revisions;
-
-	return mw_import_revids($fetch_from, \@revision_ids, \%pages_hash);
-}
-
-sub mw_import_ref_by_revs {
-
-	my $fetch_from = shift;
-	my %pages_hash = get_mw_pages();
-
-	my $last_remote = get_last_global_remote_rev();
-	my @revision_ids = $fetch_from..$last_remote;
-	return mw_import_revids($fetch_from, \@revision_ids, \%pages_hash);
-}
-
-# Import revisions given in second argument (array of integers).
-# Only pages appearing in the third argument (hash indexed by page titles)
-# will be imported.
-sub mw_import_revids {
-	my $fetch_from = shift;
-	my $revision_ids = shift;
-	my $pages = shift;
-
-	my $n = 0;
-	my $n_actual = 0;
-	my $last_timestamp = 0; # Placeholder in case $rev->timestamp is undefined
-
-	foreach my $pagerevid (@{$revision_ids}) {
-	        # Count page even if we skip it, since we display
-		# $n/$total and $total includes skipped pages.
-		$n++;
-
-		# fetch the content of the pages
-		my $query = {
-			action => 'query',
-			prop => 'revisions',
-			rvprop => 'content|timestamp|comment|user|ids',
-			revids => $pagerevid,
-		};
-
-		my $result = $mediawiki->api($query);
-
-		if (!$result) {
-			die "Failed to retrieve modified page for revision $pagerevid\n";
-		}
-
-		if (defined($result->{query}->{badrevids}->{$pagerevid})) {
-			# The revision id does not exist on the remote wiki.
-			next;
-		}
-
-		if (!defined($result->{query}->{pages})) {
-			die "Invalid revision ${pagerevid}.\n";
-		}
-
-		my @result_pages = values(%{$result->{query}->{pages}});
-		my $result_page = $result_pages[0];
-		my $rev = $result_pages[0]->{revisions}->[0];
-
-		my $page_title = $result_page->{title};
-
-		if (!exists($pages->{$page_title})) {
-			print {*STDERR} "${n}/", scalar(@{$revision_ids}),
-				": Skipping revision #$rev->{revid} of ${page_title}\n";
-			next;
-		}
-
-		$n_actual++;
-
-		my %commit;
-		$commit{author} = $rev->{user} || 'Anonymous';
-		$commit{comment} = $rev->{comment} || EMPTY_MESSAGE;
-		$commit{title} = smudge_filename($page_title);
-		$commit{mw_revision} = $rev->{revid};
-		$commit{content} = mediawiki_smudge($rev->{'*'});
-
-		if (!defined($rev->{timestamp})) {
-			$last_timestamp++;
-		} else {
-			$last_timestamp = $rev->{timestamp};
-		}
-		$commit{date} = DateTime::Format::ISO8601->parse_datetime($last_timestamp);
-
-		# Differentiates classic pages and media files.
-		my ($namespace, $filename) = $page_title =~ /^([^:]*):(.*)$/;
-		my %mediafile;
-		if ($namespace) {
-			my $id = get_mw_namespace_id($namespace);
-			if ($id && $id == get_mw_namespace_id('File')) {
-				%mediafile = get_mw_mediafile_for_page_revision($filename, $rev->{timestamp});
-			}
-		}
-		# If this is a revision of the media page for new version
-		# of a file do one common commit for both file and media page.
-		# Else do commit only for that page.
-		print {*STDERR} "${n}/", scalar(@{$revision_ids}), ": Revision #$rev->{revid} of $commit{title}\n";
-		import_file_revision(\%commit, ($fetch_from == 1), $n_actual, \%mediafile);
-	}
-
-	return $n_actual;
-}
-
-sub error_non_fast_forward {
-	my $advice = run_git_quoted(["config", "--bool", "advice.pushNonFastForward"]);
-	chomp($advice);
-	if ($advice ne 'false') {
-		# Native git-push would show this after the summary.
-		# We can't ask it to display it cleanly, so print it
-		# ourselves before.
-		print {*STDERR} "To prevent you from losing history, non-fast-forward updates were rejected\n";
-		print {*STDERR} "Merge the remote changes (e.g. 'git pull') before pushing again. See the\n";
-		print {*STDERR} "'Note about fast-forwards' section of 'git push --help' for details.\n";
-	}
-	print {*STDOUT} qq(error $_[0] "non-fast-forward"\n);
-	return 0;
-}
-
-sub mw_upload_file {
-	my $complete_file_name = shift;
-	my $new_sha1 = shift;
-	my $extension = shift;
-	my $file_deleted = shift;
-	my $summary = shift;
-	my $newrevid;
-	my $path = "File:${complete_file_name}";
-	my %hashFiles = get_allowed_file_extensions();
-	if (!exists($hashFiles{$extension})) {
-		print {*STDERR} "${complete_file_name} is not a permitted file on this wiki.\n";
-		print {*STDERR} "Check the configuration of file uploads in your mediawiki.\n";
-		return $newrevid;
-	}
-	# Deleting and uploading a file requires a privileged user
-	if ($file_deleted) {
-		$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-		my $query = {
-			action => 'delete',
-			title => $path,
-			reason => $summary
-		};
-		if (!$mediawiki->edit($query)) {
-			print {*STDERR} "Failed to delete file on remote wiki\n";
-			print {*STDERR} "Check your permissions on the remote site. Error code:\n";
-			print {*STDERR} $mediawiki->{error}->{code} . ':' . $mediawiki->{error}->{details};
-			exit 1;
-		}
-	} else {
-		# Don't let perl try to interpret file content as UTF-8 => use "raw"
-		my $content = run_git_quoted(["cat-file", "blob", $new_sha1], 'raw');
-		if ($content ne EMPTY) {
-			$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-			$mediawiki->{config}->{upload_url} =
-				"${url}/index.php/Special:Upload";
-			$mediawiki->edit({
-				action => 'upload',
-				filename => $complete_file_name,
-				comment => $summary,
-				file => [undef,
-					 $complete_file_name,
-					 Content => $content],
-				ignorewarnings => 1,
-			}, {
-				skip_encoding => 1
-			} ) || die $mediawiki->{error}->{code} . ':'
-				 . $mediawiki->{error}->{details} . "\n";
-			my $last_file_page = $mediawiki->get_page({title => $path});
-			$newrevid = $last_file_page->{revid};
-			print {*STDERR} "Pushed file: ${new_sha1} - ${complete_file_name}.\n";
-		} else {
-			print {*STDERR} "Empty file ${complete_file_name} not pushed.\n";
-		}
-	}
-	return $newrevid;
-}
-
-sub mw_push_file {
-	my $diff_info = shift;
-	# $diff_info contains a string in this format:
-	# 100644 100644 <sha1_of_blob_before_commit> <sha1_of_blob_now> <status>
-	my @diff_info_split = split(/[ \t]/, $diff_info);
-
-	# Filename, including .mw extension
-	my $complete_file_name = shift;
-	# Commit message
-	my $summary = shift;
-	# MediaWiki revision number. Keep the previous one by default,
-	# in case there's no edit to perform.
-	my $oldrevid = shift;
-	my $newrevid;
-
-	if ($summary eq EMPTY_MESSAGE) {
-		$summary = EMPTY;
-	}
-
-	my $new_sha1 = $diff_info_split[3];
-	my $old_sha1 = $diff_info_split[2];
-	my $page_created = ($old_sha1 eq NULL_SHA1);
-	my $page_deleted = ($new_sha1 eq NULL_SHA1);
-	$complete_file_name = clean_filename($complete_file_name);
-
-	my ($title, $extension) = $complete_file_name =~ /^(.*)\.([^\.]*)$/;
-	if (!defined($extension)) {
-		$extension = EMPTY;
-	}
-	if ($extension eq 'mw') {
-		my $ns = get_mw_namespace_id_for_page($complete_file_name);
-		if ($ns && $ns == get_mw_namespace_id('File') && (!$export_media)) {
-			print {*STDERR} "Ignoring media file related page: ${complete_file_name}\n";
-			return ($oldrevid, 'ok');
-		}
-		my $file_content;
-		if ($page_deleted) {
-			# Deleting a page usually requires
-			# special privileges. A common
-			# convention is to replace the page
-			# with this content instead:
-			$file_content = DELETED_CONTENT;
-		} else {
-			$file_content = run_git_quoted(["cat-file", "blob", $new_sha1]);
-		}
-
-		$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-
-		my $result = $mediawiki->edit( {
-			action => 'edit',
-			summary => $summary,
-			title => $title,
-			basetimestamp => $basetimestamps{$oldrevid},
-			text => mediawiki_clean($file_content, $page_created),
-				  }, {
-					  skip_encoding => 1 # Helps with names with accentuated characters
-				  });
-		if (!$result) {
-			if ($mediawiki->{error}->{code} == 3) {
-				# edit conflicts, considered as non-fast-forward
-				print {*STDERR} 'Warning: Error ' .
-				    $mediawiki->{error}->{code} .
-				    ' from mediawiki: ' . $mediawiki->{error}->{details} .
-				    ".\n";
-				return ($oldrevid, 'non-fast-forward');
-			} else {
-				# Other errors. Shouldn't happen => just die()
-				die 'Fatal: Error ' .
-				    $mediawiki->{error}->{code} .
-				    ' from mediawiki: ' . $mediawiki->{error}->{details} . "\n";
-			}
-		}
-		$newrevid = $result->{edit}->{newrevid};
-		print {*STDERR} "Pushed file: ${new_sha1} - ${title}\n";
-	} elsif ($export_media) {
-		$newrevid = mw_upload_file($complete_file_name, $new_sha1,
-					   $extension, $page_deleted,
-					   $summary);
-	} else {
-		print {*STDERR} "Ignoring media file ${title}\n";
-	}
-	$newrevid = ($newrevid or $oldrevid);
-	return ($newrevid, 'ok');
-}
-
-sub mw_push {
-	# multiple push statements can follow each other
-	my @refsspecs = (shift, get_more_refs('push'));
-	my $pushed;
-	for my $refspec (@refsspecs) {
-		my ($force, $local, $remote) = $refspec =~ /^(\+)?([^:]*):([^:]*)$/
-		    or die("Invalid refspec for push. Expected <src>:<dst> or +<src>:<dst>\n");
-		if ($force) {
-			print {*STDERR} "Warning: forced push not allowed on a MediaWiki.\n";
-		}
-		if ($local eq EMPTY) {
-			print {*STDERR} "Cannot delete remote branch on a MediaWiki\n";
-			print {*STDOUT} "error ${remote} cannot delete\n";
-			next;
-		}
-		if ($remote ne 'refs/heads/master') {
-			print {*STDERR} "Only push to the branch 'master' is supported on a MediaWiki\n";
-			print {*STDOUT} "error ${remote} only master allowed\n";
-			next;
-		}
-		if (mw_push_revision($local, $remote)) {
-			$pushed = 1;
-		}
-	}
-
-	# Notify Git that the push is done
-	print {*STDOUT} "\n";
-
-	if ($pushed && $dumb_push) {
-		print {*STDERR} "Just pushed some revisions to MediaWiki.\n";
-		print {*STDERR} "The pushed revisions now have to be re-imported, and your current branch\n";
-		print {*STDERR} "needs to be updated with these re-imported commits. You can do this with\n";
-		print {*STDERR} "\n";
-		print {*STDERR} "  git pull --rebase\n";
-		print {*STDERR} "\n";
-	}
-	return;
-}
-
-sub mw_push_revision {
-	my $local = shift;
-	my $remote = shift; # actually, this has to be "refs/heads/master" at this point.
-	my $last_local_revid = get_last_local_revision();
-	print {*STDERR} ".\n"; # Finish sentence started by get_last_local_revision()
-	my $last_remote_revid = get_last_remote_revision();
-	my $mw_revision = $last_remote_revid;
-
-	# Get sha1 of commit pointed by local HEAD
-	my $HEAD_sha1 = run_git_quoted_nostderr(["rev-parse", $local]);
-	chomp($HEAD_sha1);
-	# Get sha1 of commit pointed by remotes/$remotename/master
-	my $remoteorigin_sha1 = run_git_quoted_nostderr(["rev-parse", "refs/remotes/${remotename}/master"]);
-	chomp($remoteorigin_sha1);
-
-	if ($last_local_revid > 0 &&
-	    $last_local_revid < $last_remote_revid) {
-		return error_non_fast_forward($remote);
-	}
-
-	if ($HEAD_sha1 eq $remoteorigin_sha1) {
-		# nothing to push
-		return 0;
-	}
-
-	# Get every commit in between HEAD and refs/remotes/origin/master,
-	# including HEAD and refs/remotes/origin/master
-	my @commit_pairs = ();
-	if ($last_local_revid > 0) {
-		my $parsed_sha1 = $remoteorigin_sha1;
-		# Find a path from last MediaWiki commit to pushed commit
-		print {*STDERR} "Computing path from local to remote ...\n";
-		my @local_ancestry = split(/\n/, run_git_quoted(["rev-list", "--boundary", "--parents", $local, "^${parsed_sha1}"]));
-		my %local_ancestry;
-		foreach my $line (@local_ancestry) {
-			if (my ($child, $parents) = $line =~ /^-?([a-f0-9]+) ([a-f0-9 ]+)/) {
-				foreach my $parent (split(/ /, $parents)) {
-					$local_ancestry{$parent} = $child;
-				}
-			} elsif (!$line =~ /^([a-f0-9]+)/) {
-				die "Unexpected output from git rev-list: ${line}\n";
-			}
-		}
-		while ($parsed_sha1 ne $HEAD_sha1) {
-			my $child = $local_ancestry{$parsed_sha1};
-			if (!$child) {
-				print {*STDERR} "Cannot find a path in history from remote commit to last commit\n";
-				return error_non_fast_forward($remote);
-			}
-			push(@commit_pairs, [$parsed_sha1, $child]);
-			$parsed_sha1 = $child;
-		}
-	} else {
-		# No remote mediawiki revision. Export the whole
-		# history (linearized with --first-parent)
-		print {*STDERR} "Warning: no common ancestor, pushing complete history\n";
-		my $history = run_git_quoted(["rev-list", "--first-parent", "--children", $local]);
-		my @history = split(/\n/, $history);
-		@history = @history[1..$#history];
-		foreach my $line (reverse @history) {
-			my @commit_info_split = split(/[ \n]/, $line);
-			push(@commit_pairs, \@commit_info_split);
-		}
-	}
-
-	foreach my $commit_info_split (@commit_pairs) {
-		my $sha1_child = @{$commit_info_split}[0];
-		my $sha1_commit = @{$commit_info_split}[1];
-		my $diff_infos = run_git_quoted(["diff-tree", "-r", "--raw", "-z", $sha1_child, $sha1_commit]);
-		# TODO: we could detect rename, and encode them with a #redirect on the wiki.
-		# TODO: for now, it's just a delete+add
-		my @diff_info_list = split(/\0/, $diff_infos);
-		# Keep the subject line of the commit message as mediawiki comment for the revision
-		my $commit_msg = run_git_quoted(["log", "--no-walk", '--format="%s"', $sha1_commit]);
-		chomp($commit_msg);
-		# Push every blob
-		while (@diff_info_list) {
-			my $status;
-			# git diff-tree -z gives an output like
-			# <metadata>\0<filename1>\0
-			# <metadata>\0<filename2>\0
-			# and we've split on \0.
-			my $info = shift(@diff_info_list);
-			my $file = shift(@diff_info_list);
-			($mw_revision, $status) = mw_push_file($info, $file, $commit_msg, $mw_revision);
-			if ($status eq 'non-fast-forward') {
-				# we may already have sent part of the
-				# commit to MediaWiki, but it's too
-				# late to cancel it. Stop the push in
-				# the middle, but still give an
-				# accurate error message.
-				return error_non_fast_forward($remote);
-			}
-			if ($status ne 'ok') {
-				die("Unknown error from mw_push_file()\n");
-			}
-		}
-		if (!$dumb_push) {
-			run_git_quoted(["notes", "--ref=${remotename}/mediawiki",
-					"add", "-f", "-m",
-					"mediawiki_revision: ${mw_revision}",
-					$sha1_commit]);
-		}
-	}
-
-	print {*STDOUT} "ok ${remote}\n";
-	return 1;
-}
-
-sub get_allowed_file_extensions {
-	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-
-	my $query = {
-		action => 'query',
-		meta => 'siteinfo',
-		siprop => 'fileextensions'
-		};
-	my $result = $mediawiki->api($query);
-	my @file_extensions = map { $_->{ext}} @{$result->{query}->{fileextensions}};
-	my %hashFile = map { $_ => 1 } @file_extensions;
-
-	return %hashFile;
-}
-
-# In memory cache for MediaWiki namespace ids.
-my %namespace_id;
-
-# Namespaces whose id is cached in the configuration file
-# (to avoid duplicates)
-my %cached_mw_namespace_id;
-
-# Return MediaWiki id for a canonical namespace name.
-# Ex.: "File", "Project".
-sub get_mw_namespace_id {
-	$mediawiki = connect_maybe($mediawiki, $remotename, $url);
-	my $name = shift;
-
-	if (!exists $namespace_id{$name}) {
-		# Look at configuration file, if the record for that namespace is
-		# already cached. Namespaces are stored in form:
-		# "Name_of_namespace:Id_namespace", ex.: "File:6".
-		my @temp = split(/\n/,
-				 run_git_quoted(["config", "--get-all", "remote.${remotename}.namespaceCache"]));
-		chomp(@temp);
-		foreach my $ns (@temp) {
-			my ($n, $id) = split(/:/, $ns);
-			if ($id eq 'notANameSpace') {
-				$namespace_id{$n} = {is_namespace => 0};
-			} else {
-				$namespace_id{$n} = {is_namespace => 1, id => $id};
-			}
-			$cached_mw_namespace_id{$n} = 1;
-		}
-	}
-
-	if (!exists $namespace_id{$name}) {
-		print {*STDERR} "Namespace ${name} not found in cache, querying the wiki ...\n";
-		# NS not found => get namespace id from MW and store it in
-	        # configuration file.
-	        my $query = {
-	                action => 'query',
-	                meta => 'siteinfo',
-	                siprop => 'namespaces'
-	        };
-	        my $result = $mediawiki->api($query);
-
-	        while (my ($id, $ns) = each(%{$result->{query}->{namespaces}})) {
-	                if (defined($ns->{id}) && defined($ns->{canonical})) {
-				$namespace_id{$ns->{canonical}} = {is_namespace => 1, id => $ns->{id}};
-				if ($ns->{'*'}) {
-					# alias (e.g. french Fichier: as alias for canonical File:)
-					$namespace_id{$ns->{'*'}} = {is_namespace => 1, id => $ns->{id}};
-				}
-			}
-	        }
-	}
-
-	my $ns = $namespace_id{$name};
-	my $id;
-
-	if (!defined $ns) {
-		my @namespaces = map { s/ /_/g; $_; } sort keys %namespace_id;
-		print {*STDERR} "No such namespace ${name} on MediaWiki, known namespaces: @namespaces\n";
-		$ns = {is_namespace => 0};
-		$namespace_id{$name} = $ns;
-	}
-
-	if ($ns->{is_namespace}) {
-		$id = $ns->{id};
-	}
-
-	# Store "notANameSpace" as special value for inexisting namespaces
-	my $store_id = ($id || 'notANameSpace');
-
-	# Store explicitly requested namespaces on disk
-	if (!exists $cached_mw_namespace_id{$name}) {
-		run_git_quoted(["config", "--add", "remote.${remotename}.namespaceCache", "${name}:${store_id}"]);
-		$cached_mw_namespace_id{$name} = 1;
-	}
-	return $id;
-}
-
-sub get_mw_namespace_id_for_page {
-	my $namespace = shift;
-	if ($namespace =~ /^([^:]*):/) {
-		return get_mw_namespace_id($namespace);
-	} else {
-		return;
-	}
-}