Merge branch 'jc/checkout-merge-base'
[gitweb.git] / gitweb / gitweb.perl
index f94536c680c05932595f0766fde1d87b5a8f2162..7e477af9567cff322d18fc9a1fbfe507732418dc 100755 (executable)
 use File::Basename qw(basename);
 binmode STDOUT, ':utf8';
 
+our $t0;
+if (eval { require Time::HiRes; 1; }) {
+       $t0 = [Time::HiRes::gettimeofday()];
+}
+our $number_of_git_cmds = 0;
+
 BEGIN {
        CGI->compile() if $ENV{'MOD_PERL'};
 }
@@ -90,6 +96,8 @@ BEGIN
 our $logo = "++GITWEB_LOGO++";
 # URI of GIT favicon, assumed to be image/png type
 our $favicon = "++GITWEB_FAVICON++";
+# URI of gitweb.js (JavaScript code for gitweb)
+our $javascript = "++GITWEB_JS++";
 
 # URI and label (title) of GIT logo link
 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
@@ -417,6 +425,20 @@ BEGIN
                'sub' => \&feature_avatar,
                'override' => 0,
                'default' => ['']},
+
+       # Enable displaying how much time and how many git commands
+       # it took to generate and display page.  Disabled by default.
+       # Project specific override is not supported.
+       'timed' => {
+               'override' => 0,
+               'default' => [0]},
+
+       # Enable turning some links into links to actions which require
+       # JavaScript to run (like 'blame_incremental').  Not enabled by
+       # default.  Project specific override is currently not supported.
+       'javascript-actions' => {
+               'override' => 0,
+               'default' => [0]},
 );
 
 sub gitweb_get_feature {
@@ -531,6 +553,7 @@ sub filter_snapshot_fmts {
 
 # version of the core git binary
 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
+$number_of_git_cmds++;
 
 $projects_list ||= $projectroot;
 
@@ -568,12 +591,16 @@ sub filter_snapshot_fmts {
        snapshot_format => "sf",
        extra_options => "opt",
        search_use_regexp => "sr",
+       # this must be last entry (for manipulation from JavaScript)
+       javascript => "js"
 );
 our %cgi_param_mapping = @cgi_param_mapping;
 
 # we will also need to know the possible actions, for validation
 our %actions = (
        "blame" => \&git_blame,
+       "blame_incremental" => \&git_blame_incremental,
+       "blame_data" => \&git_blame_data,
        "blobdiff" => \&git_blobdiff,
        "blobdiff_plain" => \&git_blobdiff_plain,
        "blob" => \&git_blob,
@@ -2006,6 +2033,7 @@ sub get_feed_info {
 
 # returns path to the core git executable and the --git-dir parameter as list
 sub git_cmd {
+       $number_of_git_cmds++;
        return $GIT, '--git-dir='.$git_dir;
 }
 
@@ -3281,10 +3309,36 @@ sub git_footer_html {
        }
        print "</div>\n"; # class="page_footer"
 
+       if (defined $t0 && gitweb_check_feature('timed')) {
+               print "<div id=\"generating_info\">\n";
+               print 'This page took '.
+                     '<span id="generating_time" class="time_span">'.
+                     Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
+                     ' seconds </span>'.
+                     ' and '.
+                     '<span id="generating_cmd">'.
+                     $number_of_git_cmds.
+                     '</span> git commands '.
+                     " to generate.\n";
+               print "</div>\n"; # class="page_footer"
+       }
+
        if (-f $site_footer) {
                insert_file($site_footer);
        }
 
+       print qq!<script type="text/javascript" src="$javascript"></script>\n!;
+       if ($action eq 'blame_incremental') {
+               print qq!<script type="text/javascript">\n!.
+                     qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
+                     qq!           "!. href() .qq!");\n!.
+                     qq!</script>\n!;
+       } elsif (gitweb_check_feature('javascript-actions')) {
+               print qq!<script type="text/javascript">\n!.
+                     qq!window.onload = fixLinks;\n!.
+                     qq!</script>\n!;
+       }
+
        print "</body>\n" .
              "</html>";
 }
@@ -4881,7 +4935,13 @@ sub git_tag {
        git_footer_html();
 }
 
-sub git_blame {
+sub git_blame_common {
+       my $format = shift || 'porcelain';
+       if ($format eq 'porcelain' && $cgi->param('js')) {
+               $format = 'incremental';
+               $action = 'blame_incremental'; # for page title etc
+       }
+
        # permissions
        gitweb_check_feature('blame')
                or die_error(403, "Blame view not allowed");
@@ -4903,123 +4963,220 @@ sub git_blame {
                }
        }
 
-       # run git-blame --porcelain
-       open my $fd, "-|", git_cmd(), "blame", '-p',
-               $hash_base, '--', $file_name
-               or die_error(500, "Open git-blame failed");
+       my $fd;
+       if ($format eq 'incremental') {
+               # get file contents (as base)
+               open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
+                       or die_error(500, "Open git-cat-file failed");
+       } elsif ($format eq 'data') {
+               # run git-blame --incremental
+               open $fd, "-|", git_cmd(), "blame", "--incremental",
+                       $hash_base, "--", $file_name
+                       or die_error(500, "Open git-blame --incremental failed");
+       } else {
+               # run git-blame --porcelain
+               open $fd, "-|", git_cmd(), "blame", '-p',
+                       $hash_base, '--', $file_name
+                       or die_error(500, "Open git-blame --porcelain failed");
+       }
+
+       # incremental blame data returns early
+       if ($format eq 'data') {
+               print $cgi->header(
+                       -type=>"text/plain", -charset => "utf-8",
+                       -status=> "200 OK");
+               local $| = 1; # output autoflush
+               print while <$fd>;
+               close $fd
+                       or print "ERROR $!\n";
+
+               print 'END';
+               if (defined $t0 && gitweb_check_feature('timed')) {
+                       print ' '.
+                             Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
+                             ' '.$number_of_git_cmds;
+               }
+               print "\n";
+
+               return;
+       }
 
        # page header
        git_header_html();
        my $formats_nav =
                $cgi->a({-href => href(action=>"blob", -replay=>1)},
                        "blob") .
+               " | ";
+       if ($format eq 'incremental') {
+               $formats_nav .=
+                       $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
+                               "blame") . " (non-incremental)";
+       } else {
+               $formats_nav .=
+                       $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
+                               "blame") . " (incremental)";
+       }
+       $formats_nav .=
                " | " .
                $cgi->a({-href => href(action=>"history", -replay=>1)},
                        "history") .
                " | " .
-               $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
+               $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
                        "HEAD");
        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
        git_print_page_path($file_name, $ftype, $hash_base);
 
        # page body
+       if ($format eq 'incremental') {
+               print "<noscript>\n<div class=\"error\"><center><b>\n".
+                     "This page requires JavaScript to run.\n Use ".
+                     $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
+                             'this page').
+                     " instead.\n".
+                     "</b></center></div>\n</noscript>\n";
+
+               print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
+       }
+
+       print qq!<div class="page_body">\n!;
+       print qq!<div id="progress_info">... / ...</div>\n!
+               if ($format eq 'incremental');
+       print qq!<table id="blame_table" class="blame" width="100%">\n!.
+             #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
+             qq!<thead>\n!.
+             qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
+             qq!</thead>\n!.
+             qq!<tbody>\n!;
+
        my @rev_color = qw(light dark);
        my $num_colors = scalar(@rev_color);
        my $current_color = 0;
-       my %metainfo = ();
 
-       print <<HTML;
-<div class="page_body">
-<table class="blame">
-<tr><th>Commit</th><th>Line</th><th>Data</th></tr>
-HTML
- LINE:
-       while (my $line = <$fd>) {
-               chomp $line;
-               # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
-               # no <lines in group> for subsequent lines in group of lines
-               my ($full_rev, $orig_lineno, $lineno, $group_size) =
-                  ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
-               if (!exists $metainfo{$full_rev}) {
-                       $metainfo{$full_rev} = { 'nprevious' => 0 };
-               }
-               my $meta = $metainfo{$full_rev};
-               my $data;
-               while ($data = <$fd>) {
-                       chomp $data;
-                       last if ($data =~ s/^\t//); # contents of line
-                       if ($data =~ /^(\S+)(?: (.*))?$/) {
-                               $meta->{$1} = $2 unless exists $meta->{$1};
+       if ($format eq 'incremental') {
+               my $color_class = $rev_color[$current_color];
+
+               #contents of a file
+               my $linenr = 0;
+       LINE:
+               while (my $line = <$fd>) {
+                       chomp $line;
+                       $linenr++;
+
+                       print qq!<tr id="l$linenr" class="$color_class">!.
+                             qq!<td class="sha1"><a href=""> </a></td>!.
+                             qq!<td class="linenr">!.
+                             qq!<a class="linenr" href="">$linenr</a></td>!;
+                       print qq!<td class="pre">! . esc_html($line) . "</td>\n";
+                       print qq!</tr>\n!;
+               }
+
+       } else { # porcelain, i.e. ordinary blame
+               my %metainfo = (); # saves information about commits
+
+               # blame data
+       LINE:
+               while (my $line = <$fd>) {
+                       chomp $line;
+                       # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
+                       # no <lines in group> for subsequent lines in group of lines
+                       my ($full_rev, $orig_lineno, $lineno, $group_size) =
+                          ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
+                       if (!exists $metainfo{$full_rev}) {
+                               $metainfo{$full_rev} = { 'nprevious' => 0 };
                        }
-                       if ($data =~ /^previous /) {
-                               $meta->{'nprevious'}++;
+                       my $meta = $metainfo{$full_rev};
+                       my $data;
+                       while ($data = <$fd>) {
+                               chomp $data;
+                               last if ($data =~ s/^\t//); # contents of line
+                               if ($data =~ /^(\S+)(?: (.*))?$/) {
+                                       $meta->{$1} = $2 unless exists $meta->{$1};
+                               }
+                               if ($data =~ /^previous /) {
+                                       $meta->{'nprevious'}++;
+                               }
                        }
-               }
-               my $short_rev = substr($full_rev, 0, 8);
-               my $author = $meta->{'author'};
-               my %date =
-                       parse_date($meta->{'author-time'}, $meta->{'author-tz'});
-               my $date = $date{'iso-tz'};
-               if ($group_size) {
-                       $current_color = ($current_color + 1) % $num_colors;
-               }
-               my $tr_class = $rev_color[$current_color];
-               $tr_class .= ' boundary' if (exists $meta->{'boundary'});
-               $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
-               $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
-               print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
-               if ($group_size) {
-                       print "<td class=\"sha1\"";
-                       print " title=\"". esc_html($author) . ", $date\"";
-                       print " rowspan=\"$group_size\"" if ($group_size > 1);
-                       print ">";
-                       print $cgi->a({-href => href(action=>"commit",
-                                                    hash=>$full_rev,
-                                                    file_name=>$file_name)},
-                                     esc_html($short_rev));
-                       if ($group_size >= 2) {
-                               my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
-                               if (@author_initials) {
-                                       print "<br />" .
-                                             esc_html(join('', @author_initials));
-                                       #           or join('.', ...)
+                       my $short_rev = substr($full_rev, 0, 8);
+                       my $author = $meta->{'author'};
+                       my %date =
+                               parse_date($meta->{'author-time'}, $meta->{'author-tz'});
+                       my $date = $date{'iso-tz'};
+                       if ($group_size) {
+                               $current_color = ($current_color + 1) % $num_colors;
+                       }
+                       my $tr_class = $rev_color[$current_color];
+                       $tr_class .= ' boundary' if (exists $meta->{'boundary'});
+                       $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
+                       $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
+                       print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
+                       if ($group_size) {
+                               print "<td class=\"sha1\"";
+                               print " title=\"". esc_html($author) . ", $date\"";
+                               print " rowspan=\"$group_size\"" if ($group_size > 1);
+                               print ">";
+                               print $cgi->a({-href => href(action=>"commit",
+                                                            hash=>$full_rev,
+                                                            file_name=>$file_name)},
+                                             esc_html($short_rev));
+                               if ($group_size >= 2) {
+                                       my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
+                                       if (@author_initials) {
+                                               print "<br />" .
+                                                     esc_html(join('', @author_initials));
+                                               #           or join('.', ...)
+                                       }
                                }
+                               print "</td>\n";
                        }
-                       print "</td>\n";
-               }
-               # 'previous' <sha1 of parent commit> <filename at commit>
-               if (exists $meta->{'previous'} &&
-                   $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
-                       $meta->{'parent'} = $1;
-                       $meta->{'file_parent'} = unquote($2);
-               }
-               my $linenr_commit =
-                       exists($meta->{'parent'}) ?
-                       $meta->{'parent'} : $full_rev;
-               my $linenr_filename =
-                       exists($meta->{'file_parent'}) ?
-                       $meta->{'file_parent'} : unquote($meta->{'filename'});
-               my $blamed = href(action => 'blame',
-                                 file_name => $linenr_filename,
-                                 hash_base => $linenr_commit);
-               print "<td class=\"linenr\">";
-               print $cgi->a({ -href => "$blamed#l$orig_lineno",
-                               -class => "linenr" },
-                             esc_html($lineno));
-               print "</td>";
-               print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
-               print "</tr>\n";
+                       # 'previous' <sha1 of parent commit> <filename at commit>
+                       if (exists $meta->{'previous'} &&
+                           $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
+                               $meta->{'parent'} = $1;
+                               $meta->{'file_parent'} = unquote($2);
+                       }
+                       my $linenr_commit =
+                               exists($meta->{'parent'}) ?
+                               $meta->{'parent'} : $full_rev;
+                       my $linenr_filename =
+                               exists($meta->{'file_parent'}) ?
+                               $meta->{'file_parent'} : unquote($meta->{'filename'});
+                       my $blamed = href(action => 'blame',
+                                         file_name => $linenr_filename,
+                                         hash_base => $linenr_commit);
+                       print "<td class=\"linenr\">";
+                       print $cgi->a({ -href => "$blamed#l$orig_lineno",
+                                       -class => "linenr" },
+                                     esc_html($lineno));
+                       print "</td>";
+                       print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
+                       print "</tr>\n";
+               } # end while
+
        }
-       print "</table>\n";
-       print "</div>";
+
+       # footer
+       print "</tbody>\n".
+             "</table>\n"; # class="blame"
+       print "</div>\n";   # class="blame_body"
        close $fd
                or print "Reading blob failed\n";
 
-       # page footer
        git_footer_html();
 }
 
+sub git_blame {
+       git_blame_common();
+}
+
+sub git_blame_incremental {
+       git_blame_common('incremental');
+}
+
+sub git_blame_data {
+       git_blame_common('data');
+}
+
 sub git_tags {
        my $head = git_get_head_hash($project);
        git_header_html();