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)';
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 $file_name;
+}
+
my %commands = (
'help' =>
- [\&help, {}, \&help]
+ [\&help, {}, \&help],
+ 'preview' =>
+ [\&preview, {
+ '<>' => \&file,
+ 'output|o=s' => \$preview_file_name,
+ 'remote|r=s' => \$remote_name,
+ 'autoload|a' => \$autoload
+ }, \&preview_help]
);
# Search for sub-command
# Launch command
&{$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 {
git mw commands are:
help Display help information about git mw
+ preview Parse and render local file into HTML
END
exit;
}