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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
commitc8bae7493d2f2910b57f13ded012e86bdcfb0532 (patch)
tree24e09d9f84dec336720cf393e156089ca2835791 /contrib/mw-to-git/git-remote-mediawiki.perl
parentInitial commit. (diff)
downloadgit-c8bae7493d2f2910b57f13ded012e86bdcfb0532.tar.xz
git-c8bae7493d2f2910b57f13ded012e86bdcfb0532.zip
Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'contrib/mw-to-git/git-remote-mediawiki.perl')
-rwxr-xr-xcontrib/mw-to-git/git-remote-mediawiki.perl1390
1 files changed, 1390 insertions, 0 deletions
diff --git a/contrib/mw-to-git/git-remote-mediawiki.perl b/contrib/mw-to-git/git-remote-mediawiki.perl
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+#! /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;
+ }
+}