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Diffstat (limited to 'contrib/mw-to-git/git-mw.perl')
| -rwxr-xr-x | contrib/mw-to-git/git-mw.perl | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/contrib/mw-to-git/git-mw.perl b/contrib/mw-to-git/git-mw.perl new file mode 100755 index 0000000..eb52a53 --- /dev/null +++ b/contrib/mw-to-git/git-mw.perl @@ -0,0 +1,368 @@ +#!/usr/bin/perl + +# Copyright (C) 2013 +# Benoit Person <benoit.person@ensimag.imag.fr> +# Celestin Matte <celestin.matte@ensimag.imag.fr> +# License: GPL v2 or later + +# Set of tools for git repo with a mediawiki remote. +# Documentation & bugtracker: https://github.com/Git-Mediawiki/Git-Mediawiki + +use strict; +use warnings; + +use Getopt::Long; +use URI::URL qw(url); +use LWP::UserAgent; +use HTML::TreeBuilder; + +use Git; +use MediaWiki::API; +use Git::Mediawiki qw(clean_filename connect_maybe + EMPTY HTTP_CODE_PAGE_NOT_FOUND); + +# By default, use UTF-8 to communicate with Git and the user +binmode STDERR, ':encoding(UTF-8)'; +binmode STDOUT, ':encoding(UTF-8)'; + +# Global parameters +my $verbose = 0; +sub v_print { + if ($verbose) { + return print {*STDERR} @_; + } + 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], + 'preview' => + [\&preview, { + '<>' => \&file, + 'output|o=s' => \$preview_file_name, + 'remote|r=s' => \$remote_name, + 'autoload|a' => \$autoload + }, \&preview_help] +); + +# Search for sub-command +my $cmd = $commands{'help'}; +for (0..@ARGV-1) { + if (defined $commands{$ARGV[$_]}) { + $cmd = $commands{$ARGV[$_]}; + splice @ARGV, $_, 1; + last; + } +}; +GetOptions( %{$cmd->[1]}, + 'help|h' => \&{$cmd->[2]}, + 'verbose|v' => \$verbose); + +# Launch command +&{$cmd->[0]}; + +############################# 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 { + print {*STDOUT} <<'END'; +usage: git mw <command> <args> + +git mw commands are: + help Display help information about git mw + preview Parse and render local file into HTML +END + exit; +} |