X-Git-Url: https://git.ladys.computer/Gitweb/blobdiff_plain/d77aeb50057866ca21b2ddd5f758cb5099ddf2ce8c0b0598a5592f7306fb4399..097dce23698a8adb33d6ed01fba227d0ff7823735e79417847eae2d840252640:/gitweb.perl

diff --git a/gitweb.perl b/gitweb.perl
index a1ae09a..bc41a92 100755
--- a/gitweb.perl
+++ b/gitweb.perl
@@ -21,7 +21,6 @@ our $cgi = new CGI;
 our $version = "++GIT_VERSION++";
 our $my_url = $cgi->url();
 our $my_uri = $cgi->url(-absolute => 1);
-our $rss_link = "";
 
 # core git executable to use
 # this can just be "git" if your webserver has a sensible PATH
@@ -37,6 +36,9 @@ our $git_temp = "/tmp/gitweb";
 # target of the home link on top of all pages
 our $home_link = $my_uri;
 
+# string of the home link on top of all pages
+our $home_link_str = "++GITWEB_HOME_LINK_STR++";
+
 # name of your site or organization to appear in page titles
 # replace this with something more descriptive for clearer bookmarks
 our $site_name = "++GITWEB_SITENAME++" || $ENV{'SERVER_NAME'} || "Untitled";
@@ -52,6 +54,10 @@ our $logo = "++GITWEB_LOGO++";
 # source of projects list
 our $projects_list = "++GITWEB_LIST++";
 
+# list of git base URLs used for URL to where fetch project from,
+# i.e. full URL is "$git_base_url/$project"
+our @git_base_url_list = ("++GITWEB_BASE_URL++");
+
 # default blob_plain mimetype and default charset for text/plain blob
 our $default_blob_plain_mimetype = 'text/plain';
 our $default_text_plain_charset  = undef;
@@ -76,8 +82,7 @@ if (! -d $git_temp) {
 our $action = $cgi->param('a');
 if (defined $action) {
 	if ($action =~ m/[^0-9a-zA-Z\.\-_]/) {
-		undef $action;
-		die_error(undef, "Invalid action parameter.");
+		die_error(undef, "Invalid action parameter");
 	}
 	# action which does not check rest of parameters
 	if ($action eq "opml") {
@@ -88,21 +93,19 @@ if (defined $action) {
 
 our $project = ($cgi->param('p') || $ENV{'PATH_INFO'});
 if (defined $project) {
-	$project =~ s|^/||; $project =~ s|/$||;
-	$project = validate_input($project);
-	if (!defined($project)) {
-		die_error(undef, "Invalid project parameter.");
+	$project =~ s|^/||;
+	$project =~ s|/$||;
+}
+if (defined $project && $project) {
+	if (!validate_input($project)) {
+		die_error(undef, "Invalid project parameter");
 	}
 	if (!(-d "$projectroot/$project")) {
-		undef $project;
-		die_error(undef, "No such directory.");
+		die_error(undef, "No such directory");
 	}
 	if (!(-e "$projectroot/$project/HEAD")) {
-		undef $project;
-		die_error(undef, "No such project.");
+		die_error(undef, "No such project");
 	}
-	$rss_link = "<link rel=\"alternate\" title=\"" . esc_param($project) . " log\" href=\"" .
-	            "$my_uri?" . esc_param("p=$project;a=rss") . "\" type=\"application/rss+xml\"/>";
 	$ENV{'GIT_DIR'} = "$projectroot/$project";
 } else {
 	git_project_list();
@@ -111,49 +114,43 @@ if (defined $project) {
 
 our $file_name = $cgi->param('f');
 if (defined $file_name) {
-	$file_name = validate_input($file_name);
-	if (!defined($file_name)) {
-		die_error(undef, "Invalid file parameter.");
+	if (!validate_input($file_name)) {
+		die_error(undef, "Invalid file parameter");
 	}
 }
 
 our $hash = $cgi->param('h');
 if (defined $hash) {
-	$hash = validate_input($hash);
-	if (!defined($hash)) {
-		die_error(undef, "Invalid hash parameter.");
+	if (!validate_input($hash)) {
+		die_error(undef, "Invalid hash parameter");
 	}
 }
 
 our $hash_parent = $cgi->param('hp');
 if (defined $hash_parent) {
-	$hash_parent = validate_input($hash_parent);
-	if (!defined($hash_parent)) {
-		die_error(undef, "Invalid hash parent parameter.");
+	if (!validate_input($hash_parent)) {
+		die_error(undef, "Invalid hash parent parameter");
 	}
 }
 
 our $hash_base = $cgi->param('hb');
 if (defined $hash_base) {
-	$hash_base = validate_input($hash_base);
-	if (!defined($hash_base)) {
-		die_error(undef, "Invalid hash base parameter.");
+	if (!validate_input($hash_base)) {
+		die_error(undef, "Invalid hash base parameter");
 	}
 }
 
 our $page = $cgi->param('pg');
 if (defined $page) {
 	if ($page =~ m/[^0-9]$/) {
-		undef $page;
-		die_error(undef, "Invalid page parameter.");
+		die_error(undef, "Invalid page parameter");
 	}
 }
 
 our $searchtext = $cgi->param('s');
 if (defined $searchtext) {
 	if ($searchtext =~ m/[^a-zA-Z0-9_\.\/\-\+\:\@ ]/) {
-		undef $searchtext;
-		die_error(undef, "Invalid search parameter.");
+		die_error(undef, "Invalid search parameter");
 	}
 	$searchtext = quotemeta $searchtext;
 }
@@ -182,12 +179,38 @@ my %actions = (
 
 $action = 'summary' if (!defined($action));
 if (!defined($actions{$action})) {
-	undef $action;
-	die_error(undef, "Unknown action.");
+	die_error(undef, "Unknown action");
 }
 $actions{$action}->();
 exit;
 
+## ======================================================================
+## action links
+
+sub href(%) {
+	my %mapping = (
+		action => "a",
+		project => "p",
+		file_name => "f",
+		hash => "h",
+		hash_parent => "hp",
+		hash_base => "hb",
+		page => "pg",
+		searchtext => "s",
+	);
+
+	my %params = @_;
+	$params{"project"} ||= $project;
+
+	my $href = "$my_uri?";
+	$href .= esc_param( join(";",
+		map { "$mapping{$_}=$params{$_}" } keys %params
+	) );
+
+	return $href;
+}
+
+
 ## ======================================================================
 ## validation, quoting/unquoting and escaping
 
@@ -235,6 +258,20 @@ sub unquote {
 	return $str;
 }
 
+# escape tabs (convert tabs to spaces)
+sub untabify {
+	my $line = shift;
+
+	while ((my $pos = index($line, "\t")) != -1) {
+		if (my $count = (8 - ($pos % 8))) {
+			my $spaces = ' ' x $count;
+			$line =~ s/\t/$spaces/;
+		}
+	}
+
+	return $line;
+}
+
 ## ----------------------------------------------------------------------
 ## HTML aware string manipulation
 
@@ -351,7 +388,7 @@ sub format_log_line_html {
 	if ($line =~ m/([0-9a-fA-F]{40})/) {
 		my $hash_text = $1;
 		if (git_get_type($hash_text) eq "commit") {
-			my $link = $cgi->a({-class => "text", -href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_text")}, $hash_text);
+			my $link = $cgi->a({-class => "text", -href => href(action=>"commit", hash=>$hash_text)}, $hash_text);
 			$line =~ s/$hash_text/$link/;
 		}
 	}
@@ -359,21 +396,53 @@ sub format_log_line_html {
 }
 
 # format marker of refs pointing to given object
-sub git_get_referencing {
+sub format_ref_marker {
 	my ($refs, $id) = @_;
+	my $markers = '';
 
 	if (defined $refs->{$id}) {
-		return ' <span class="tag">' . esc_html($refs->{$id}) . '</span>';
+		foreach my $ref (@{$refs->{$id}}) {
+			my ($type, $name) = qw();
+			# e.g. tags/v2.6.11 or heads/next
+			if ($ref =~ m!^(.*?)s?/(.*)$!) {
+				$type = $1;
+				$name = $2;
+			} else {
+				$type = "ref";
+				$name = $ref;
+			}
+
+			$markers .= " <span class=\"$type\">" . esc_html($name) . "</span>";
+		}
+	}
+
+	if ($markers) {
+		return ' <span class="refs">'. $markers . '</span>';
 	} else {
 		return "";
 	}
 }
 
+# format, perhaps shortened and with markers, title line
+sub format_subject_html {
+	my ($long, $short, $href, $extra) = @_;
+	$extra = '' unless defined($extra);
+
+	if (length($short) < length($long)) {
+		return $cgi->a({-href => $href, -class => "list",
+		                -title => $long},
+		       esc_html($short) . $extra);
+	} else {
+		return $cgi->a({-href => $href, -class => "list"},
+		       esc_html($long)  . $extra);
+	}
+}
+
 ## ----------------------------------------------------------------------
 ## git utility subroutines, invoking git commands
 
 # get HEAD ref of given project as hash
-sub git_read_head {
+sub git_get_head_hash {
 	my $project = shift;
 	my $oENV = $ENV{'GIT_DIR'};
 	my $retval = undef;
@@ -429,7 +498,7 @@ sub git_get_hash_by_path {
 	my $tree = $base;
 
 	open my $fd, "-|", $GIT, "ls-tree", $base, "--", $path
-		or die_error(undef, "Open git-ls-tree failed.");
+		or die_error(undef, "Open git-ls-tree failed");
 	my $line = <$fd>;
 	close $fd or return undef;
 
@@ -442,7 +511,7 @@ sub git_get_hash_by_path {
 ## git utility functions, directly accessing git repository
 
 # assumes that PATH is not symref
-sub git_read_hash {
+sub git_get_hash_by_ref {
 	my $path = shift;
 
 	open my $fd, "$projectroot/$path" or return undef;
@@ -454,7 +523,7 @@ sub git_read_hash {
 	}
 }
 
-sub git_read_description {
+sub git_get_project_description {
 	my $path = shift;
 
 	open my $fd, "$projectroot/$path/description" or return undef;
@@ -464,7 +533,17 @@ sub git_read_description {
 	return $descr;
 }
 
-sub git_read_projects {
+sub git_get_project_url_list {
+	my $path = shift;
+
+	open my $fd, "$projectroot/$path/cloneurl" or return undef;
+	my @git_project_url_list = map { chomp; $_ } <$fd>;
+	close $fd;
+
+	return wantarray ? @git_project_url_list : \@git_project_url_list;
+}
+
+sub git_get_projects_list {
 	my @list;
 
 	if (-d $projects_list) {
@@ -508,21 +587,58 @@ sub git_read_projects {
 	return @list;
 }
 
-sub read_info_ref {
+sub git_get_project_owner {
+	my $project = shift;
+	my $owner;
+
+	return undef unless $project;
+
+	# read from file (url-encoded):
+	# 'git%2Fgit.git Linus+Torvalds'
+	# 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
+	# 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
+	if (-f $projects_list) {
+		open (my $fd , $projects_list);
+		while (my $line = <$fd>) {
+			chomp $line;
+			my ($pr, $ow) = split ' ', $line;
+			$pr = unescape($pr);
+			$ow = unescape($ow);
+			if ($pr eq $project) {
+				$owner = decode("utf8", $ow, Encode::FB_DEFAULT);
+				last;
+			}
+		}
+		close $fd;
+	}
+	if (!defined $owner) {
+		$owner = get_file_owner("$projectroot/$project");
+	}
+
+	return $owner;
+}
+
+sub git_get_references {
 	my $type = shift || "";
 	my %refs;
+	my $fd;
 	# 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c	refs/tags/v2.6.11
 	# c39ae07f393806ccf406ef966e9a15afc43cc36a	refs/tags/v2.6.11^{}
-	open my $fd, "$projectroot/$project/info/refs" or return;
+	if (-f "$projectroot/$project/info/refs") {
+		open $fd, "$projectroot/$project/info/refs"
+			or return;
+	} else {
+		open $fd, "-|", $GIT, "ls-remote", "."
+			or return;
+	}
+
 	while (my $line = <$fd>) {
 		chomp $line;
-		# attention: for $type == "" it saves only last path part of ref name
-		# e.g. from 'refs/heads/jn/gitweb' it would leave only 'gitweb'
-		if ($line =~ m/^([0-9a-fA-F]{40})\t.*$type\/([^\^]+)/) {
+		if ($line =~ m/^([0-9a-fA-F]{40})\trefs\/($type\/?[^\^]+)/) {
 			if (defined $refs{$1}) {
-				$refs{$1} .= " / $2";
+				push @{$refs{$1}}, $2;
 			} else {
-				$refs{$1} = $2;
+				$refs{$1} = [ $2 ];
 			}
 		}
 	}
@@ -533,7 +649,7 @@ sub read_info_ref {
 ## ----------------------------------------------------------------------
 ## parse to hash functions
 
-sub date_str {
+sub parse_date {
 	my $epoch = shift;
 	my $tz = shift || "-0000";
 
@@ -558,7 +674,7 @@ sub date_str {
 	return %date;
 }
 
-sub git_read_tag {
+sub parse_tag {
 	my $tag_id = shift;
 	my %tag;
 	my @comment;
@@ -593,7 +709,7 @@ sub git_read_tag {
 	return %tag
 }
 
-sub git_read_commit {
+sub parse_commit {
 	my $commit_id = shift;
 	my $commit_text = shift;
 
@@ -687,10 +803,53 @@ sub git_read_commit {
 	return %co;
 }
 
+# parse ref from ref_file, given by ref_id, with given type
+sub parse_ref {
+	my $ref_file = shift;
+	my $ref_id = shift;
+	my $type = shift || git_get_type($ref_id);
+	my %ref_item;
+
+	$ref_item{'type'} = $type;
+	$ref_item{'id'} = $ref_id;
+	$ref_item{'epoch'} = 0;
+	$ref_item{'age'} = "unknown";
+	if ($type eq "tag") {
+		my %tag = parse_tag($ref_id);
+		$ref_item{'comment'} = $tag{'comment'};
+		if ($tag{'type'} eq "commit") {
+			my %co = parse_commit($tag{'object'});
+			$ref_item{'epoch'} = $co{'committer_epoch'};
+			$ref_item{'age'} = $co{'age_string'};
+		} elsif (defined($tag{'epoch'})) {
+			my $age = time - $tag{'epoch'};
+			$ref_item{'epoch'} = $tag{'epoch'};
+			$ref_item{'age'} = age_string($age);
+		}
+		$ref_item{'reftype'} = $tag{'type'};
+		$ref_item{'name'} = $tag{'name'};
+		$ref_item{'refid'} = $tag{'object'};
+	} elsif ($type eq "commit"){
+		my %co = parse_commit($ref_id);
+		$ref_item{'reftype'} = "commit";
+		$ref_item{'name'} = $ref_file;
+		$ref_item{'title'} = $co{'title'};
+		$ref_item{'refid'} = $ref_id;
+		$ref_item{'epoch'} = $co{'committer_epoch'};
+		$ref_item{'age'} = $co{'age_string'};
+	} else {
+		$ref_item{'reftype'} = $type;
+		$ref_item{'name'} = $ref_file;
+		$ref_item{'refid'} = $ref_id;
+	}
+
+	return %ref_item;
+}
+
 ## ......................................................................
 ## parse to array of hashes functions
 
-sub git_read_refs {
+sub git_get_refs_list {
 	my $ref_dir = shift;
 	my @reflist;
 
@@ -704,46 +863,13 @@ sub git_read_refs {
 	}, "$projectroot/$project/$ref_dir");
 
 	foreach my $ref_file (@refs) {
-		my $ref_id = git_read_hash("$project/$ref_dir/$ref_file");
+		my $ref_id = git_get_hash_by_ref("$project/$ref_dir/$ref_file");
 		my $type = git_get_type($ref_id) || next;
-		my %ref_item;
-		my %co;
-		$ref_item{'type'} = $type;
-		$ref_item{'id'} = $ref_id;
-		$ref_item{'epoch'} = 0;
-		$ref_item{'age'} = "unknown";
-		if ($type eq "tag") {
-			my %tag = git_read_tag($ref_id);
-			$ref_item{'comment'} = $tag{'comment'};
-			if ($tag{'type'} eq "commit") {
-				%co = git_read_commit($tag{'object'});
-				$ref_item{'epoch'} = $co{'committer_epoch'};
-				$ref_item{'age'} = $co{'age_string'};
-			} elsif (defined($tag{'epoch'})) {
-				my $age = time - $tag{'epoch'};
-				$ref_item{'epoch'} = $tag{'epoch'};
-				$ref_item{'age'} = age_string($age);
-			}
-			$ref_item{'reftype'} = $tag{'type'};
-			$ref_item{'name'} = $tag{'name'};
-			$ref_item{'refid'} = $tag{'object'};
-		} elsif ($type eq "commit"){
-			%co = git_read_commit($ref_id);
-			$ref_item{'reftype'} = "commit";
-			$ref_item{'name'} = $ref_file;
-			$ref_item{'title'} = $co{'title'};
-			$ref_item{'refid'} = $ref_id;
-			$ref_item{'epoch'} = $co{'committer_epoch'};
-			$ref_item{'age'} = $co{'age_string'};
-		} else {
-			$ref_item{'reftype'} = $type;
-			$ref_item{'name'} = $ref_file;
-			$ref_item{'refid'} = $ref_id;
-		}
+		my %ref_item = parse_ref($ref_file, $ref_id, $type);
 
 		push @reflist, \%ref_item;
 	}
-	# sort tags by age
+	# sort refs by age
 	@reflist = sort {$b->{'epoch'} <=> $a->{'epoch'}} @reflist;
 	return \@reflist;
 }
@@ -775,6 +901,7 @@ sub mimetype_guess_file {
 	my %mimemap;
 	open(MIME, $mimemap) or return undef;
 	while (<MIME>) {
+		next if m/^#/; # skip comments
 		my ($mime, $exts) = split(/\t+/);
 		if (defined $exts) {
 			my @exts = split(/\s+/, $exts);
@@ -796,14 +923,17 @@ sub mimetype_guess {
 
 	if ($mimetypes_file) {
 		my $file = $mimetypes_file;
-		#$file =~ m#^/# or $file = "$projectroot/$path/$file";
+		if ($file !~ m!^/!) { # if it is relative path
+			# it is relative to project
+			$file = "$projectroot/$project/$file";
+		}
 		$mime = mimetype_guess_file($filename, $file);
 	}
 	$mime ||= mimetype_guess_file($filename, '/etc/mime.types');
 	return $mime;
 }
 
-sub git_blob_plain_mimetype {
+sub blob_mimetype {
 	my $fd = shift;
 	my $filename = shift;
 
@@ -856,7 +986,7 @@ sub git_header_html {
 	# 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
 	# we have to do this because MSIE sometimes globs '*/*', pretending to
 	# support xhtml+xml but choking when it gets what it asked for.
-	if ($cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ && $cgi->Accept('application/xhtml+xml') != 0) {
+	if (defined $cgi->http('HTTP_ACCEPT') && $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ && $cgi->Accept('application/xhtml+xml') != 0) {
 		$content_type = 'application/xhtml+xml';
 	} else {
 		$content_type = 'text/html';
@@ -873,17 +1003,22 @@ sub git_header_html {
 <meta name="robots" content="index, nofollow"/>
 <title>$title</title>
 <link rel="stylesheet" type="text/css" href="$stylesheet"/>
-$rss_link
-</head>
-<body>
 EOF
-	print "<div class=\"page_header\">\n" .
+	if (defined $project) {
+		printf('<link rel="alternate" title="%s log" '.
+		       'href="%s" type="application/rss+xml"/>'."\n",
+		       esc_param($project), href(action=>"rss"));
+	}
+
+	print "</head>\n" .
+	      "<body>\n" .
+	      "<div class=\"page_header\">\n" .
 	      "<a href=\"http://www.kernel.org/pub/software/scm/git/docs/\" title=\"git documentation\">" .
 	      "<img src=\"$logo\" width=\"72\" height=\"27\" alt=\"git\" style=\"float:right; border-width:0px;\"/>" .
 	      "</a>\n";
-	print $cgi->a({-href => esc_param($home_link)}, "projects") . " / ";
+	print $cgi->a({-href => esc_param($home_link)}, $home_link_str) . " / ";
 	if (defined $project) {
-		print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, esc_html($project));
+		print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
 		if (defined $action) {
 			print " / $action";
 		}
@@ -916,11 +1051,11 @@ EOF
 sub git_footer_html {
 	print "<div class=\"page_footer\">\n";
 	if (defined $project) {
-		my $descr = git_read_description($project);
+		my $descr = git_get_project_description($project);
 		if (defined $descr) {
 			print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
 		}
-		print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=rss"), -class => "rss_logo"}, "RSS") . "\n";
+		print $cgi->a({-href => href(action=>"rss"), -class => "rss_logo"}, "RSS") . "\n";
 	} else {
 		print $cgi->a({-href => "$my_uri?" . esc_param("a=opml"), -class => "rss_logo"}, "OPML") . "\n";
 	}
@@ -946,7 +1081,7 @@ sub die_error {
 ## ----------------------------------------------------------------------
 ## functions printing or outputting HTML: navigation
 
-sub git_page_nav {
+sub git_print_page_nav {
 	my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
 	$extra = '' if !defined $extra; # pager or formats
 
@@ -955,54 +1090,52 @@ sub git_page_nav {
 		@navs = grep { $_ ne $suppress } @navs;
 	}
 
-	my %arg = map { $_, ''} @navs;
+	my %arg = map { $_ => {action=>$_} } @navs;
 	if (defined $head) {
 		for (qw(commit commitdiff)) {
-			$arg{$_} = ";h=$head";
+			$arg{$_}{hash} = $head;
 		}
 		if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
 			for (qw(shortlog log)) {
-				$arg{$_} = ";h=$head";
+				$arg{$_}{hash} = $head;
 			}
 		}
 	}
-	$arg{tree} .= ";h=$treehead" if defined $treehead;
-	$arg{tree} .= ";hb=$treebase" if defined $treebase;
+	$arg{tree}{hash} = $treehead if defined $treehead;
+	$arg{tree}{hash_base} = $treebase if defined $treebase;
 
 	print "<div class=\"page_nav\">\n" .
 		(join " | ",
-		 map { $_ eq $current
-					 ? $_
-					 : $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$_$arg{$_}")}, "$_")
-				 }
-		 @navs);
+		 map { $_ eq $current ?
+		       $_ : $cgi->a({-href => href(%{$arg{$_}})}, "$_")
+		 } @navs);
 	print "<br/>\n$extra<br/>\n" .
 	      "</div>\n";
 }
 
-sub git_get_paging_nav {
+sub format_paging_nav {
 	my ($action, $hash, $head, $page, $nrevs) = @_;
 	my $paging_nav;
 
 
 	if ($hash ne $head || $page) {
-		$paging_nav .= $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$action")}, "HEAD");
+		$paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
 	} else {
 		$paging_nav .= "HEAD";
 	}
 
 	if ($page > 0) {
 		$paging_nav .= " &sdot; " .
-			$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$action;h=$hash;pg=" . ($page-1)),
-							 -accesskey => "p", -title => "Alt-p"}, "prev");
+			$cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page-1),
+			         -accesskey => "p", -title => "Alt-p"}, "prev");
 	} else {
 		$paging_nav .= " &sdot; prev";
 	}
 
 	if ($nrevs >= (100 * ($page+1)-1)) {
 		$paging_nav .= " &sdot; " .
-			$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$action;h=$hash;pg=" . ($page+1)),
-							 -accesskey => "n", -title => "Alt-n"}, "next");
+			$cgi->a({-href => href(action=>$action, hash=>$hash, page=>$page+1),
+			         -accesskey => "n", -title => "Alt-n"}, "next");
 	} else {
 		$paging_nav .= " &sdot; next";
 	}
@@ -1013,17 +1146,18 @@ sub git_get_paging_nav {
 ## ......................................................................
 ## functions printing or outputting HTML: div
 
-sub git_header_div {
+sub git_print_header_div {
 	my ($action, $title, $hash, $hash_base) = @_;
-	my $rest = '';
+	my %args = ();
 
-	$rest .= ";h=$hash" if $hash;
-	$rest .= ";hb=$hash_base" if $hash_base;
+	$args{action} = $action;
+	$args{hash} = $hash if $hash;
+	$args{hash_base} = $hash_base if $hash_base;
 
 	print "<div class=\"header\">\n" .
-	      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$action$rest"),
-	               -class => "title"}, $title ? $title : $action) . "\n" .
-	      "</div>\n";
+	      $cgi->a({-href => href(%args), -class => "title"},
+	      $title ? $title : $action) .
+	      "\n</div>\n";
 }
 
 sub git_print_page_path {
@@ -1034,7 +1168,7 @@ sub git_print_page_path {
 		print "<div class=\"page_path\"><b>/</b></div>\n";
 	} elsif (defined $type && $type eq 'blob') {
 		print "<div class=\"page_path\"><b>" .
-			$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob_plain;f=$file_name")}, esc_html($name)) . "</b><br/></div>\n";
+			$cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name)}, esc_html($name)) . "</b><br/></div>\n";
 	} else {
 		print "<div class=\"page_path\"><b>" . esc_html($name) . "</b><br/></div>\n";
 	}
@@ -1043,6 +1177,145 @@ sub git_print_page_path {
 ## ......................................................................
 ## functions printing large fragments of HTML
 
+sub git_difftree_body {
+	my ($difftree, $parent) = @_;
+
+	print "<div class=\"list_head\">\n";
+	if ($#{$difftree} > 10) {
+		print(($#{$difftree} + 1) . " files changed:\n");
+	}
+	print "</div>\n";
+
+	print "<table class=\"diff_tree\">\n";
+	my $alternate = 0;
+	foreach my $line (@{$difftree}) {
+		# ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M	ls-files.c'
+		# ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M	rev-tree.c'
+		if ($line !~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
+			next;
+		}
+		my $from_mode = $1;
+		my $to_mode = $2;
+		my $from_id = $3;
+		my $to_id = $4;
+		my $status = $5;
+		my $similarity = $6; # score
+		my $file = validate_input(unquote($7));
+
+		if ($alternate) {
+			print "<tr class=\"dark\">\n";
+		} else {
+			print "<tr class=\"light\">\n";
+		}
+		$alternate ^= 1;
+
+		if ($status eq "A") { # created
+			my $mode_chng = "";
+			if (S_ISREG(oct $to_mode)) {
+				$mode_chng = sprintf(" with mode: %04o", (oct $to_mode) & 0777);
+			}
+			print "<td>" .
+			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$file),
+			              -class => "list"}, esc_html($file)) .
+			      "</td>\n" .
+			      "<td><span class=\"file_status new\">[new " . file_type($to_mode) . "$mode_chng]</span></td>\n" .
+			      "<td class=\"link\">" .
+			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$file)}, "blob") .
+			      "</td>\n";
+
+		} elsif ($status eq "D") { # deleted
+			print "<td>" .
+			      $cgi->a({-href => href(action=>"blob", hash=>$from_id, hash_base=>$parent, file_name=>$file),
+			               -class => "list"}, esc_html($file)) . "</td>\n" .
+			      "<td><span class=\"file_status deleted\">[deleted " . file_type($from_mode). "]</span></td>\n" .
+			      "<td class=\"link\">" .
+			      $cgi->a({-href => href(action=>"blob", hash=>$from_id, hash_base=>$parent, file_name=>$file)}, "blob") . " | " .
+			      $cgi->a({-href => href(action=>"history", hash_base=>$parent, file_name=>$file)}, "history") .
+			      "</td>\n"
+
+		} elsif ($status eq "M" || $status eq "T") { # modified, or type changed
+			my $mode_chnge = "";
+			if ($from_mode != $to_mode) {
+				$mode_chnge = " <span class=\"file_status mode_chnge\">[changed";
+				if (((oct $from_mode) & S_IFMT) != ((oct $to_mode) & S_IFMT)) {
+					$mode_chnge .= " from " . file_type($from_mode) . " to " . file_type($to_mode);
+				}
+				if (((oct $from_mode) & 0777) != ((oct $to_mode) & 0777)) {
+					if (S_ISREG($from_mode) && S_ISREG($to_mode)) {
+						$mode_chnge .= sprintf(" mode: %04o->%04o", (oct $from_mode) & 0777, (oct $to_mode) & 0777);
+					} elsif (S_ISREG($to_mode)) {
+						$mode_chnge .= sprintf(" mode: %04o", (oct $to_mode) & 0777);
+					}
+				}
+				$mode_chnge .= "]</span>\n";
+			}
+			print "<td>";
+			if ($to_id ne $from_id) { # modified
+				print $cgi->a({-href => href(action=>"blobdiff", hash=>$to_id, hash_parent=>$from_id, hash_base=>$hash, file_name=>$file),
+				              -class => "list"}, esc_html($file));
+			} else { # mode changed
+				print $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$file),
+				              -class => "list"}, esc_html($file));
+			}
+			print "</td>\n" .
+			      "<td>$mode_chnge</td>\n" .
+			      "<td class=\"link\">" .
+				$cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$file)}, "blob");
+			if ($to_id ne $from_id) { # modified
+				print $cgi->a({-href => href(action=>"blobdiff", hash=>$to_id, hash_parent=>$from_id, hash_base=>$hash, file_name=>$file)}, "diff");
+			}
+			print " | " . $cgi->a({-href => href(action=>"history", hash_base=>$hash, file_name=>$file)}, "history") . "\n";
+			print "</td>\n";
+
+		} elsif ($status eq "R") { # renamed
+			my ($from_file, $to_file) = split "\t", $file;
+			my $mode_chng = "";
+			if ($from_mode != $to_mode) {
+				$mode_chng = sprintf(", mode: %04o", (oct $to_mode) & 0777);
+			}
+			print "<td>" .
+			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file),
+			              -class => "list"}, esc_html($to_file)) . "</td>\n" .
+			      "<td><span class=\"file_status moved\">[moved from " .
+			      $cgi->a({-href => href(action=>"blob", hash=>$from_id, hash_base=>$parent, file_name=>$from_file),
+			              -class => "list"}, esc_html($from_file)) .
+			      " with " . (int $similarity) . "% similarity$mode_chng]</span></td>\n" .
+			      "<td class=\"link\">" .
+			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file)}, "blob");
+			if ($to_id ne $from_id) {
+				print " | " .
+				      $cgi->a({-href => "$my_uri?" .
+				              esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file;fp=$from_file")}, "diff");
+			}
+			print "</td>\n";
+
+		} elsif ($status eq "C") { # copied
+			my ($from_file, $to_file) = split "\t", $file;
+			my $mode_chng = "";
+			if ($from_mode != $to_mode) {
+				$mode_chng = sprintf(", mode: %04o", (oct $to_mode) & 0777);
+			}
+			print "<td>" .
+			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file),
+			              -class => "list"}, esc_html($to_file)) . "</td>\n" .
+			      "<td><span class=\"file_status copied\">[copied from " .
+			      $cgi->a({-href => href(action=>"blob", hash=>$from_id, hash_base=>$parent, file_name=>$from_file),
+			              -class => "list"}, esc_html($from_file)) .
+			      " with " . (int $similarity) . "% similarity$mode_chng]</span></td>\n" .
+			      "<td class=\"link\">" .
+			      $cgi->a({-href => href(action=>"blob", hash=>$to_id, hash_base=>$hash, file_name=>$to_file)}, "blob");
+			if ($to_id ne $from_id) {
+				print " | " .
+				      $cgi->a({-href => "$my_uri?" .
+				              esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file;fp=$from_file")}, "diff");
+			}
+			print "</td>\n";
+		} # we should not encounter Unmerged (U) or Unknown (X) status
+		print "</tr>\n";
+	}
+	print "</table>\n";
+}
+
 sub git_shortlog_body {
 	# uses global variable $project
 	my ($revlist, $from, $to, $refs, $extra) = @_;
@@ -1053,10 +1326,9 @@ sub git_shortlog_body {
 	my $alternate = 0;
 	for (my $i = $from; $i <= $to; $i++) {
 		my $commit = $revlist->[$i];
-		#my $ref = defined $refs ? git_get_referencing($refs, $commit) : '';
-		my $ref = git_get_referencing($refs, $commit);
-		my %co = git_read_commit($commit);
-		my %ad = date_str($co{'author_epoch'});
+		#my $ref = defined $refs ? format_ref_marker($refs, $commit) : '';
+		my $ref = format_ref_marker($refs, $commit);
+		my %co = parse_commit($commit);
 		if ($alternate) {
 			print "<tr class=\"dark\">\n";
 		} else {
@@ -1067,20 +1339,70 @@ sub git_shortlog_body {
 		print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
 		      "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
 		      "<td>";
-		if (length($co{'title_short'}) < length($co{'title'})) {
-			print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"),
-			               -class => "list", -title => "$co{'title'}"},
-			      "<b>" . esc_html($co{'title_short'}) . "$ref</b>");
+		print format_subject_html($co{'title'}, $co{'title_short'}, href(action=>"commit", hash=>$commit), $ref);
+		print "</td>\n" .
+		      "<td class=\"link\">" .
+		      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
+		      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
+		      "</td>\n" .
+		      "</tr>\n";
+	}
+	if (defined $extra) {
+		print "<tr>\n" .
+		      "<td colspan=\"4\">$extra</td>\n" .
+		      "</tr>\n";
+	}
+	print "</table>\n";
+}
+
+sub git_history_body {
+	# Warning: assumes constant type (blob or tree) during history
+	my ($fd, $refs, $hash_base, $ftype, $extra) = @_;
+
+	print "<table class=\"history\" cellspacing=\"0\">\n";
+	my $alternate = 0;
+	while (my $line = <$fd>) {
+		if ($line !~ m/^([0-9a-fA-F]{40})/) {
+			next;
+		}
+
+		my $commit = $1;
+		my %co = parse_commit($commit);
+		if (!%co) {
+			next;
+		}
+
+		my $ref = format_ref_marker($refs, $commit);
+
+		if ($alternate) {
+			print "<tr class=\"dark\">\n";
 		} else {
-			print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"),
-			               -class => "list"},
-			      "<b>" . esc_html($co{'title'}) . "$ref</b>");
+			print "<tr class=\"light\">\n";
 		}
+		$alternate ^= 1;
+		print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
+		      # shortlog uses      chop_str($co{'author_name'}, 10)
+		      "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
+		      "<td>";
+		# originally git_history used chop_str($co{'title'}, 50)
+		print format_subject_html($co{'title'}, $co{'title_short'}, href(action=>"commit", hash=>$commit), $ref);
 		print "</td>\n" .
 		      "<td class=\"link\">" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit")}, "commit") . " | " .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
-		      "</td>\n" .
+		      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
+		      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
+		      $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype);
+
+		if ($ftype eq 'blob') {
+			my $blob_current = git_get_hash_by_path($hash_base, $file_name);
+			my $blob_parent  = git_get_hash_by_path($commit, $file_name);
+			if (defined $blob_current && defined $blob_parent &&
+					$blob_current ne $blob_parent) {
+				print " | " .
+					$cgi->a({-href => href(action=>"blobdiff", hash=>$blob_current, hash_parent=>$blob_parent, hash_base=>$commit, file_name=>$file_name)},
+					        "diff to current");
+			}
+		}
+		print "</td>\n" .
 		      "</tr>\n";
 	}
 	if (defined $extra) {
@@ -1116,34 +1438,28 @@ sub git_tags_body {
 		$alternate ^= 1;
 		print "<td><i>$tag{'age'}</i></td>\n" .
 		      "<td>" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$tag{'reftype'};h=$tag{'refid'}"),
+		      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
 		               -class => "list"}, "<b>" . esc_html($tag{'name'}) . "</b>") .
 		      "</td>\n" .
 		      "<td>";
 		if (defined $comment) {
-			if (length($comment_short) < length($comment)) {
-				print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tag;h=$tag{'id'}"),
-				               -class => "list", -title => $comment}, $comment_short);
-			} else {
-				print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tag;h=$tag{'id'}"),
-				               -class => "list"}, $comment);
-			}
+			print format_subject_html($comment, $comment_short, href(action=>"tag", hash=>$tag{'id'}));
 		}
 		print "</td>\n" .
 		      "<td class=\"selflink\">";
 		if ($tag{'type'} eq "tag") {
-			print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tag;h=$tag{'id'}")}, "tag");
+			print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
 		} else {
 			print "&nbsp;";
 		}
 		print "</td>\n" .
 		      "<td class=\"link\">" . " | " .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$tag{'reftype'};h=$tag{'refid'}")}, $tag{'reftype'});
+		      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
 		if ($tag{'reftype'} eq "commit") {
-			print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
-			      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$tag{'refid'}")}, "log");
+			print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
+			      " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'refid'})}, "log");
 		} elsif ($tag{'reftype'} eq "blob") {
-			print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob_plain;h=$tag{'refid'}")}, "raw");
+			print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
 		}
 		print "</td>\n" .
 		      "</tr>";
@@ -1176,12 +1492,12 @@ sub git_heads_body {
 		$alternate ^= 1;
 		print "<td><i>$tag{'age'}</i></td>\n" .
 		      ($tag{'id'} eq $head ? "<td class=\"current_head\">" : "<td>") .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}"),
+		      $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'}),
 		               -class => "list"}, "<b>" . esc_html($tag{'name'}) . "</b>") .
 		      "</td>\n" .
 		      "<td class=\"link\">" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") . " | " .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$tag{'name'}")}, "log") .
+		      $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") . " | " .
+		      $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log") .
 		      "</td>\n" .
 		      "</tr>";
 	}
@@ -1249,12 +1565,7 @@ sub git_diff_print {
 				# skip errors
 				next;
 			}
-			while ((my $pos = index($line, "\t")) != -1) {
-				if (my $count = (8 - (($pos-1) % 8))) {
-					my $spaces = ' ' x $count;
-					$line =~ s/\t/$spaces/;
-				}
-			}
+			$line = untabify($line);
 			print "<div class=\"diff$diff_class\">" . esc_html($line) . "</div>\n";
 		}
 	}
@@ -1276,27 +1587,27 @@ sub git_diff_print {
 sub git_project_list {
 	my $order = $cgi->param('o');
 	if (defined $order && $order !~ m/project|descr|owner|age/) {
-		die_error(undef, "Invalid order parameter '$order'.");
+		die_error(undef, "Unknown order parameter");
 	}
 
-	my @list = git_read_projects();
+	my @list = git_get_projects_list();
 	my @projects;
 	if (!@list) {
-		die_error(undef, "No projects found.");
+		die_error(undef, "No projects found");
 	}
 	foreach my $pr (@list) {
-		my $head = git_read_head($pr->{'path'});
+		my $head = git_get_head_hash($pr->{'path'});
 		if (!defined $head) {
 			next;
 		}
 		$ENV{'GIT_DIR'} = "$projectroot/$pr->{'path'}";
-		my %co = git_read_commit($head);
+		my %co = parse_commit($head);
 		if (!%co) {
 			next;
 		}
 		$pr->{'commit'} = \%co;
 		if (!defined $pr->{'descr'}) {
-			my $descr = git_read_description($pr->{'path'}) || "";
+			my $descr = git_get_project_description($pr->{'path'}) || "";
 			$pr->{'descr'} = chop_str($descr, 25, 5);
 		}
 		if (!defined $pr->{'owner'}) {
@@ -1380,81 +1691,74 @@ sub git_project_list {
 }
 
 sub git_summary {
-	my $descr = git_read_description($project) || "none";
-	my $head = git_read_head($project);
-	my %co = git_read_commit($head);
-	my %cd = date_str($co{'committer_epoch'}, $co{'committer_tz'});
+	my $descr = git_get_project_description($project) || "none";
+	my $head = git_get_head_hash($project);
+	my %co = parse_commit($head);
+	my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
 
-	my $owner;
-	if (-f $projects_list) {
-		open (my $fd , $projects_list);
-		while (my $line = <$fd>) {
-			chomp $line;
-			my ($pr, $ow) = split ' ', $line;
-			$pr = unescape($pr);
-			$ow = unescape($ow);
-			if ($pr eq $project) {
-				$owner = decode("utf8", $ow, Encode::FB_DEFAULT);
-				last;
-			}
-		}
-		close $fd;
-	}
-	if (!defined $owner) {
-		$owner = get_file_owner("$projectroot/$project");
-	}
+	my $owner = git_get_project_owner($project);
 
-	my $refs = read_info_ref();
+	my $refs = git_get_references();
 	git_header_html();
-	git_page_nav('summary','', $head);
+	git_print_page_nav('summary','', $head);
 
 	print "<div class=\"title\">&nbsp;</div>\n";
 	print "<table cellspacing=\"0\">\n" .
 	      "<tr><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
 	      "<tr><td>owner</td><td>$owner</td></tr>\n" .
-	      "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n" .
-	      "</table>\n";
+	      "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
+	# use per project git URL list in $projectroot/$project/cloneurl
+	# or make project git URL from git base URL and project name
+	my $url_tag = "URL";
+	my @url_list = git_get_project_url_list($project);
+	@url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
+	foreach my $git_url (@url_list) {
+		next unless $git_url;
+		print "<tr><td>$url_tag</td><td>$git_url</td></tr>\n";
+		$url_tag = "";
+	}
+	print "</table>\n";
 
-	open my $fd, "-|", $GIT, "rev-list", "--max-count=17", git_read_head($project)
-		or die_error(undef, "Open git-rev-list failed.");
+	open my $fd, "-|", $GIT, "rev-list", "--max-count=17", git_get_head_hash($project)
+		or die_error(undef, "Open git-rev-list failed");
 	my @revlist = map { chomp; $_ } <$fd>;
 	close $fd;
-	git_header_div('shortlog');
+	git_print_header_div('shortlog');
 	git_shortlog_body(\@revlist, 0, 15, $refs,
-	                  $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "..."));
+	                  $cgi->a({-href => href(action=>"shortlog")}, "..."));
 
-	my $taglist = git_read_refs("refs/tags");
+	my $taglist = git_get_refs_list("refs/tags");
 	if (defined @$taglist) {
-		git_header_div('tags');
+		git_print_header_div('tags');
 		git_tags_body($taglist, 0, 15,
-		              $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tags")}, "..."));
+		              $cgi->a({-href => href(action=>"tags")}, "..."));
 	}
 
-	my $headlist = git_read_refs("refs/heads");
+	my $headlist = git_get_refs_list("refs/heads");
 	if (defined @$headlist) {
-		git_header_div('heads');
+		git_print_header_div('heads');
 		git_heads_body($headlist, $head, 0, 15,
-		               $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=heads")}, "..."));
+		               $cgi->a({-href => href(action=>"heads")}, "..."));
 	}
 
 	git_footer_html();
 }
 
 sub git_tag {
-	my $head = git_read_head($project);
+	my $head = git_get_head_hash($project);
 	git_header_html();
-	git_page_nav('','', $head,undef,$head);
-	my %tag = git_read_tag($hash);
-	git_header_div('commit', esc_html($tag{'name'}), $hash);
+	git_print_page_nav('','', $head,undef,$head);
+	my %tag = parse_tag($hash);
+	git_print_header_div('commit', esc_html($tag{'name'}), $hash);
 	print "<div class=\"title_text\">\n" .
 	      "<table cellspacing=\"0\">\n" .
 	      "<tr>\n" .
 	      "<td>object</td>\n" .
-	      "<td>" . $cgi->a({-class => "list", -href => "$my_uri?" . esc_param("p=$project;a=$tag{'type'};h=$tag{'object'}")}, $tag{'object'}) . "</td>\n" .
-	      "<td class=\"link\">" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$tag{'type'};h=$tag{'object'}")}, $tag{'type'}) . "</td>\n" .
+	      "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})}, $tag{'object'}) . "</td>\n" .
+	      "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})}, $tag{'type'}) . "</td>\n" .
 	      "</tr>\n";
 	if (defined($tag{'author'})) {
-		my %ad = date_str($tag{'epoch'}, $tag{'tz'});
+		my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
 		print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
 		print "<tr><td></td><td>" . $ad{'rfc2822'} . sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) . "</td></tr>\n";
 	}
@@ -1472,11 +1776,11 @@ sub git_tag {
 sub git_blame2 {
 	my $fd;
 	my $ftype;
-	die_error(undef, "Permission denied.") if (!git_get_project_config_bool ('blame'));
+	die_error(undef, "Permission denied") if (!git_get_project_config_bool ('blame'));
 	die_error('404 Not Found', "File name not defined") if (!$file_name);
-	$hash_base ||= git_read_head($project);
-	die_error(undef, "Reading commit failed") unless ($hash_base);
-	my %co = git_read_commit($hash_base)
+	$hash_base ||= git_get_head_hash($project);
+	die_error(undef, "Couldn't find base commit") unless ($hash_base);
+	my %co = parse_commit($hash_base)
 		or die_error(undef, "Reading commit failed");
 	if (!defined $hash) {
 		$hash = git_get_hash_by_path($hash_base, $file_name, "blob")
@@ -1484,18 +1788,18 @@ sub git_blame2 {
 	}
 	$ftype = git_get_type($hash);
 	if ($ftype !~ "blob") {
-		die_error("400 Bad Request", "object is not a blob");
+		die_error("400 Bad Request", "Object is not a blob");
 	}
 	open ($fd, "-|", $GIT, "blame", '-l', $file_name, $hash_base)
-		or die_error(undef, "Open git-blame failed.");
+		or die_error(undef, "Open git-blame failed");
 	git_header_html();
 	my $formats_nav =
-		$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$hash;hb=$hash_base;f=$file_name")}, "blob") .
-		" | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blame;f=$file_name")}, "head");
-	git_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
-	git_header_div('commit', esc_html($co{'title'}), $hash_base);
+		$cgi->a({-href => href(action=>"blobl", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)}, "blob") .
+		" | " . $cgi->a({-href => href(action=>"blame", file_name=>$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);
-	my @rev_color = (qw(light dark));
+	my @rev_color = (qw(light2 dark2));
 	my $num_colors = scalar(@rev_color);
 	my $current_color = 0;
 	my $last_rev;
@@ -1517,7 +1821,7 @@ sub git_blame2 {
 		}
 		print "<tr class=\"$rev_color[$current_color]\">\n";
 		print "<td class=\"sha1\">" .
-			$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$full_rev;f=$file_name")}, esc_html($rev)) . "</td>\n";
+			$cgi->a({-href => href(action=>"commit", hash=>$full_rev, file_name=>$file_name)}, esc_html($rev)) . "</td>\n";
 		print "<td class=\"linenr\"><a id=\"l$lineno\" href=\"#l$lineno\" class=\"linenr\">" . esc_html($lineno) . "</a></td>\n";
 		print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
 		print "</tr>\n";
@@ -1530,24 +1834,24 @@ sub git_blame2 {
 
 sub git_blame {
 	my $fd;
-	die_error('403 Permission denied', "Permission denied.") if (!git_get_project_config_bool ('blame'));
-	die_error('404 Not Found', "What file will it be, master?") if (!$file_name);
-	$hash_base ||= git_read_head($project);
-	die_error(undef, "Reading commit failed.") unless ($hash_base);
-	my %co = git_read_commit($hash_base)
-		or die_error(undef, "Reading commit failed.");
+	die_error('403 Permission denied', "Permission denied") if (!git_get_project_config_bool ('blame'));
+	die_error('404 Not Found', "File name not defined") if (!$file_name);
+	$hash_base ||= git_get_head_hash($project);
+	die_error(undef, "Couldn't find base commit") unless ($hash_base);
+	my %co = parse_commit($hash_base)
+		or die_error(undef, "Reading commit failed");
 	if (!defined $hash) {
 		$hash = git_get_hash_by_path($hash_base, $file_name, "blob")
-			or die_error(undef, "Error lookup file.");
+			or die_error(undef, "Error lookup file");
 	}
 	open ($fd, "-|", $GIT, "annotate", '-l', '-t', '-r', $file_name, $hash_base)
-		or die_error(undef, "Open git-annotate failed.");
+		or die_error(undef, "Open git-annotate failed");
 	git_header_html();
 	my $formats_nav =
-		$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$hash;hb=$hash_base;f=$file_name")}, "blob") .
-		" | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blame;f=$file_name")}, "head");
-	git_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
-	git_header_div('commit', esc_html($co{'title'}), $hash_base);
+		$cgi->a({-href => href(action=>"blobl", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)}, "blob") .
+		" | " . $cgi->a({-href => href(action=>"blame", file_name=>$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, 'blob');
 	print "<div class=\"page_body\">\n";
 	print <<HTML;
@@ -1594,18 +1898,13 @@ HTML
 		$age_class  = age_class($age);
 		$author     = esc_html ($author);
 		$author     =~ s/ /&nbsp;/g;
-		# escape tabs
-		while ((my $pos = index($data, "\t")) != -1) {
-			if (my $count = (8 - ($pos % 8))) {
-				my $spaces = ' ' x $count;
-				$data =~ s/\t/$spaces/;
-			}
-		}
+
+		$data = untabify($data);
 		$data = esc_html ($data);
 
 		print <<HTML;
   <tr class="$line_class[$line_class_num]">
-    <td class="sha1"><a href="$my_uri?${\esc_param ("p=$project;a=commit;h=$long_rev")}" class="text">$short_rev..</a></td>
+    <td class="sha1"><a href="${\href (action=>"commit", hash=>$long_rev)}" class="text">$short_rev..</a></td>
     <td class="$age_class">$age_str</td>
     <td>$author</td>
     <td class="linenr"><a id="$lineno" href="#$lineno" class="linenr">$lineno</a></td>
@@ -1620,12 +1919,12 @@ HTML
 }
 
 sub git_tags {
-	my $head = git_read_head($project);
+	my $head = git_get_head_hash($project);
 	git_header_html();
-	git_page_nav('','', $head,undef,$head);
-	git_header_div('summary', $project);
+	git_print_page_nav('','', $head,undef,$head);
+	git_print_header_div('summary', $project);
 
-	my $taglist = git_read_refs("refs/tags");
+	my $taglist = git_get_refs_list("refs/tags");
 	if (defined @$taglist) {
 		git_tags_body($taglist);
 	}
@@ -1633,13 +1932,12 @@ sub git_tags {
 }
 
 sub git_heads {
-	my $head = git_read_head($project);
+	my $head = git_get_head_hash($project);
 	git_header_html();
-	git_page_nav('','', $head,undef,$head);
-	git_header_div('summary', $project);
+	git_print_page_nav('','', $head,undef,$head);
+	git_print_header_div('summary', $project);
 
-	my $taglist = git_read_refs("refs/heads");
-	my $alternate = 0;
+	my $taglist = git_get_refs_list("refs/heads");
 	if (defined @$taglist) {
 		git_heads_body($taglist, $head);
 	}
@@ -1649,18 +1947,18 @@ sub git_heads {
 sub git_blob_plain {
 	if (!defined $hash) {
 		if (defined $file_name) {
-			my $base = $hash_base || git_read_head($project);
+			my $base = $hash_base || git_get_head_hash($project);
 			$hash = git_get_hash_by_path($base, $file_name, "blob")
-				or die_error(undef, "Error lookup file.");
+				or die_error(undef, "Error lookup file");
 		} else {
-			die_error(undef, "No file name defined.");
+			die_error(undef, "No file name defined");
 		}
 	}
 	my $type = shift;
 	open my $fd, "-|", $GIT, "cat-file", "blob", $hash
 		or die_error(undef, "Couldn't cat $file_name, $hash");
 
-	$type ||= git_blob_plain_mimetype($fd, $file_name);
+	$type ||= blob_mimetype($fd, $file_name);
 
 	# save as filename, even when no $file_name is given
 	my $save_as = "$hash";
@@ -1682,36 +1980,36 @@ sub git_blob_plain {
 sub git_blob {
 	if (!defined $hash) {
 		if (defined $file_name) {
-			my $base = $hash_base || git_read_head($project);
+			my $base = $hash_base || git_get_head_hash($project);
 			$hash = git_get_hash_by_path($base, $file_name, "blob")
-				or die_error(undef, "Error lookup file.");
+				or die_error(undef, "Error lookup file");
 		} else {
-			die_error(undef, "No file name defined.");
+			die_error(undef, "No file name defined");
 		}
 	}
 	my $have_blame = git_get_project_config_bool ('blame');
 	open my $fd, "-|", $GIT, "cat-file", "blob", $hash
-		or die_error(undef, "Couldn't cat $file_name, $hash.");
-	my $mimetype = git_blob_plain_mimetype($fd, $file_name);
+		or die_error(undef, "Couldn't cat $file_name, $hash");
+	my $mimetype = blob_mimetype($fd, $file_name);
 	if ($mimetype !~ m/^text\//) {
 		close $fd;
 		return git_blob_plain($mimetype);
 	}
 	git_header_html();
 	my $formats_nav = '';
-	if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
+	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
 		if (defined $file_name) {
 			if ($have_blame) {
-				$formats_nav .= $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blame;h=$hash;hb=$hash_base;f=$file_name")}, "blame") . " | ";
+				$formats_nav .= $cgi->a({-href => href(action=>"blame", hash=>$hash, hash_base=>$hash_base, file_name=>$file_name)}, "blame") . " | ";
 			}
 			$formats_nav .=
-				$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob_plain;h=$hash;f=$file_name")}, "plain") .
-				" | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;hb=HEAD;f=$file_name")}, "head");
+				$cgi->a({-href => href(action=>"blob_plain", hash=>$hash, file_name=>$file_name)}, "plain") .
+				" | " . $cgi->a({-href => href(action=>"blob", hash_base=>"HEAD", file_name=>$file_name)}, "head");
 		} else {
-			$formats_nav .= $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob_plain;h=$hash")}, "plain");
+			$formats_nav .= $cgi->a({-href => href(action=>"blob_plain", hash=>$hash)}, "plain");
 		}
-		git_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
-		git_header_div('commit', esc_html($co{'title'}), $hash_base);
+		git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
+		git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
 	} else {
 		print "<div class=\"page_nav\">\n" .
 		      "<br/><br/></div>\n" .
@@ -1723,12 +2021,7 @@ sub git_blob {
 	while (my $line = <$fd>) {
 		chomp $line;
 		$nr++;
-		while ((my $pos = index($line, "\t")) != -1) {
-			if (my $count = (8 - ($pos % 8))) {
-				my $spaces = ' ' x $count;
-				$line =~ s/\t/$spaces/;
-			}
-		}
+		$line = untabify($line);
 		printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n", $nr, $nr, $nr, esc_html($line);
 	}
 	close $fd or print "Reading blob failed.\n";
@@ -1738,7 +2031,7 @@ sub git_blob {
 
 sub git_tree {
 	if (!defined $hash) {
-		$hash = git_read_head($project);
+		$hash = git_get_head_hash($project);
 		if (defined $file_name) {
 			my $base = $hash_base || $hash;
 			$hash = git_get_hash_by_path($base, $file_name, "tree");
@@ -1749,21 +2042,21 @@ sub git_tree {
 	}
 	$/ = "\0";
 	open my $fd, "-|", $GIT, "ls-tree", '-z', $hash
-		or die_error(undef, "Open git-ls-tree failed.");
+		or die_error(undef, "Open git-ls-tree failed");
 	my @entries = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading tree failed.");
+	close $fd or die_error(undef, "Reading tree failed");
 	$/ = "\n";
 
-	my $refs = read_info_ref();
-	my $ref = git_get_referencing($refs, $hash_base);
+	my $refs = git_get_references();
+	my $ref = format_ref_marker($refs, $hash_base);
 	git_header_html();
 	my $base_key = "";
 	my $base = "";
 	my $have_blame = git_get_project_config_bool ('blame');
-	if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
+	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
 		$base_key = ";hb=$hash_base";
-		git_page_nav('tree','', $hash_base);
-		git_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
+		git_print_page_nav('tree','', $hash_base);
+		git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
 	} else {
 		print "<div class=\"page_nav\">\n";
 		print "<br/><br/></div>\n";
@@ -1819,46 +2112,46 @@ sub git_tree {
 }
 
 sub git_log {
-	my $head = git_read_head($project);
+	my $head = git_get_head_hash($project);
 	if (!defined $hash) {
 		$hash = $head;
 	}
 	if (!defined $page) {
 		$page = 0;
 	}
-	my $refs = read_info_ref();
+	my $refs = git_get_references();
 
 	my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
 	open my $fd, "-|", $GIT, "rev-list", $limit, $hash
-		or die_error(undef, "Open git-rev-list failed.");
+		or die_error(undef, "Open git-rev-list failed");
 	my @revlist = map { chomp; $_ } <$fd>;
 	close $fd;
 
-	my $paging_nav = git_get_paging_nav('log', $hash, $head, $page, $#revlist);
+	my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#revlist);
 
 	git_header_html();
-	git_page_nav('log','', $hash,undef,undef, $paging_nav);
+	git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
 
 	if (!@revlist) {
-		my %co = git_read_commit($hash);
+		my %co = parse_commit($hash);
 
-		git_header_div('summary', $project);
+		git_print_header_div('summary', $project);
 		print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
 	}
 	for (my $i = ($page * 100); $i <= $#revlist; $i++) {
 		my $commit = $revlist[$i];
-		my $ref = git_get_referencing($refs, $commit);
-		my %co = git_read_commit($commit);
+		my $ref = format_ref_marker($refs, $commit);
+		my %co = parse_commit($commit);
 		next if !%co;
-		my %ad = date_str($co{'author_epoch'});
-		git_header_div('commit',
-									 "<span class=\"age\">$co{'age_string'}</span>" .
-									 esc_html($co{'title'}) . $ref,
-									 $commit);
+		my %ad = parse_date($co{'author_epoch'});
+		git_print_header_div('commit',
+		               "<span class=\"age\">$co{'age_string'}</span>" .
+		               esc_html($co{'title'}) . $ref,
+		               $commit);
 		print "<div class=\"title_text\">\n" .
 		      "<div class=\"log_link\">\n" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit")}, "commit") .
-		      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
+		      $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
+		      " | " . $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
 		      "<br/>\n" .
 		      "</div>\n" .
 		      "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
@@ -1889,43 +2182,43 @@ sub git_log {
 }
 
 sub git_commit {
-	my %co = git_read_commit($hash);
+	my %co = parse_commit($hash);
 	if (!%co) {
-		die_error(undef, "Unknown commit object.");
+		die_error(undef, "Unknown commit object");
 	}
-	my %ad = date_str($co{'author_epoch'}, $co{'author_tz'});
-	my %cd = date_str($co{'committer_epoch'}, $co{'committer_tz'});
+	my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
+	my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
 
 	my $parent = $co{'parent'};
 	if (!defined $parent) {
 		$parent = "--root";
 	}
 	open my $fd, "-|", $GIT, "diff-tree", '-r', '-M', $parent, $hash
-		or die_error(undef, "Open git-diff-tree failed.");
+		or die_error(undef, "Open git-diff-tree failed");
 	my @difftree = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading git-diff-tree failed.");
+	close $fd or die_error(undef, "Reading git-diff-tree failed");
 
 	# non-textual hash id's can be cached
 	my $expires;
 	if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
 		$expires = "+1d";
 	}
-	my $refs = read_info_ref();
-	my $ref = git_get_referencing($refs, $co{'id'});
+	my $refs = git_get_references();
+	my $ref = format_ref_marker($refs, $co{'id'});
 	my $formats_nav = '';
 	if (defined $file_name && defined $co{'parent'}) {
 		my $parent = $co{'parent'};
-		$formats_nav .= $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blame;hb=$parent;f=$file_name")}, "blame");
+		$formats_nav .= $cgi->a({-href => href(action=>"blame", hash_parent=>$parent, file_name=>$file_name)}, "blame");
 	}
 	git_header_html(undef, $expires);
-	git_page_nav('commit', defined $co{'parent'} ? '' : 'commitdiff',
-							 $hash, $co{'tree'}, $hash,
-							 $formats_nav);
+	git_print_page_nav('commit', defined $co{'parent'} ? '' : 'commitdiff',
+	             $hash, $co{'tree'}, $hash,
+	             $formats_nav);
 
 	if (defined $co{'parent'}) {
-		git_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
+		git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
 	} else {
-		git_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
+		git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
 	}
 	print "<div class=\"title_text\">\n" .
 	      "<table cellspacing=\"0\">\n";
@@ -1945,19 +2238,19 @@ sub git_commit {
 	print "<tr>" .
 	      "<td>tree</td>" .
 	      "<td class=\"sha1\">" .
-	      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash"), class => "list"}, $co{'tree'}) .
+	      $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash), class => "list"}, $co{'tree'}) .
 	      "</td>" .
-	      "<td class=\"link\">" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
+	      "<td class=\"link\">" . $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)}, "tree") .
 	      "</td>" .
 	      "</tr>\n";
 	my $parents = $co{'parents'};
 	foreach my $par (@$parents) {
 		print "<tr>" .
 		      "<td>parent</td>" .
-		      "<td class=\"sha1\">" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$par"), class => "list"}, $par) . "</td>" .
+		      "<td class=\"sha1\">" . $cgi->a({-href => href(action=>"commit", hash=>$par), class => "list"}, $par) . "</td>" .
 		      "<td class=\"link\">" .
-		      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$par")}, "commit") .
-		      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash;hp=$par")}, "commitdiff") .
+		      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
+		      " | " . $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "commitdiff") .
 		      "</td>" .
 		      "</tr>\n";
 	}
@@ -1986,112 +2279,20 @@ sub git_commit {
 		}
 	}
 	print "</div>\n";
-	print "<div class=\"list_head\">\n";
-	if ($#difftree > 10) {
-		print(($#difftree + 1) . " files changed:\n");
-	}
-	print "</div>\n";
-	print "<table class=\"diff_tree\">\n";
-	my $alternate = 0;
-	foreach my $line (@difftree) {
-		# ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M      ls-files.c'
-		# ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M      rev-tree.c'
-		if (!($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/)) {
-			next;
-		}
-		my $from_mode = $1;
-		my $to_mode = $2;
-		my $from_id = $3;
-		my $to_id = $4;
-		my $status = $5;
-		my $similarity = $6;
-		my $file = validate_input(unquote($7));
-		if ($alternate) {
-			print "<tr class=\"dark\">\n";
-		} else {
-			print "<tr class=\"light\">\n";
-		}
-		$alternate ^= 1;
-		if ($status eq "A") {
-			my $mode_chng = "";
-			if (S_ISREG(oct $to_mode)) {
-				$mode_chng = sprintf(" with mode: %04o", (oct $to_mode) & 0777);
-			}
-			print "<td>" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file)) . "</td>\n" .
-			      "<td><span class=\"file_status new\">[new " . file_type($to_mode) . "$mode_chng]</span></td>\n" .
-			      "<td class=\"link\">" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, "blob") . "</td>\n";
-		} elsif ($status eq "D") {
-			print "<td>" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file)) . "</td>\n" .
-			      "<td><span class=\"file_status deleted\">[deleted " . file_type($from_mode). "]</span></td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, "blob") .
-			      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=history;hb=$hash;f=$file")}, "history") .
-			      "</td>\n"
-		} elsif ($status eq "M" || $status eq "T") {
-			my $mode_chnge = "";
-			if ($from_mode != $to_mode) {
-				$mode_chnge = " <span class=\"file_status mode_chnge\">[changed";
-				if (((oct $from_mode) & S_IFMT) != ((oct $to_mode) & S_IFMT)) {
-					$mode_chnge .= " from " . file_type($from_mode) . " to " . file_type($to_mode);
-				}
-				if (((oct $from_mode) & 0777) != ((oct $to_mode) & 0777)) {
-					if (S_ISREG($from_mode) && S_ISREG($to_mode)) {
-						$mode_chnge .= sprintf(" mode: %04o->%04o", (oct $from_mode) & 0777, (oct $to_mode) & 0777);
-					} elsif (S_ISREG($to_mode)) {
-						$mode_chnge .= sprintf(" mode: %04o", (oct $to_mode) & 0777);
-					}
-				}
-				$mode_chnge .= "]</span>\n";
-			}
-			print "<td>";
-			if ($to_id ne $from_id) {
-				print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file));
-			} else {
-				print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file));
-			}
-			print "</td>\n" .
-			      "<td>$mode_chnge</td>\n" .
-			      "<td class=\"link\">";
-			print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, "blob");
-			if ($to_id ne $from_id) {
-				print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file")}, "diff");
-			}
-			print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=history;hb=$hash;f=$file")}, "history") . "\n";
-			print "</td>\n";
-		} elsif ($status eq "R") {
-			my ($from_file, $to_file) = split "\t", $file;
-			my $mode_chng = "";
-			if ($from_mode != $to_mode) {
-				$mode_chng = sprintf(", mode: %04o", (oct $to_mode) & 0777);
-			}
-			print "<td>" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file"), -class => "list"}, esc_html($to_file)) . "</td>\n" .
-			      "<td><span class=\"file_status moved\">[moved from " .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$from_file"), -class => "list"}, esc_html($from_file)) .
-			      " with " . (int $similarity) . "% similarity$mode_chng]</span></td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file")}, "blob");
-			if ($to_id ne $from_id) {
-				print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file")}, "diff");
-			}
-			print "</td>\n";
-		}
-		print "</tr>\n";
-	}
-	print "</table>\n";
+
+	git_difftree_body(\@difftree, $parent);
+
 	git_footer_html();
 }
 
 sub git_blobdiff {
 	mkdir($git_temp, 0700);
 	git_header_html();
-	if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
+	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
 		my $formats_nav =
 			$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff_plain;h=$hash;hp=$hash_parent")}, "plain");
-		git_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
-		git_header_div('commit', esc_html($co{'title'}), $hash_base);
+		git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
+		git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
 	} else {
 		print "<div class=\"page_nav\">\n" .
 		      "<br/><br/></div>\n" .
@@ -2117,30 +2318,30 @@ sub git_blobdiff_plain {
 
 sub git_commitdiff {
 	mkdir($git_temp, 0700);
-	my %co = git_read_commit($hash);
+	my %co = parse_commit($hash);
 	if (!%co) {
-		die_error(undef, "Unknown commit object.");
+		die_error(undef, "Unknown commit object");
 	}
 	if (!defined $hash_parent) {
-		$hash_parent = $co{'parent'};
+		$hash_parent = $co{'parent'} || '--root';
 	}
 	open my $fd, "-|", $GIT, "diff-tree", '-r', $hash_parent, $hash
-		or die_error(undef, "Open git-diff-tree failed.");
+		or die_error(undef, "Open git-diff-tree failed");
 	my @difftree = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading diff-tree failed.");
+	close $fd or die_error(undef, "Reading git-diff-tree failed");
 
 	# non-textual hash id's can be cached
 	my $expires;
 	if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
 		$expires = "+1d";
 	}
-	my $refs = read_info_ref();
-	my $ref = git_get_referencing($refs, $co{'id'});
+	my $refs = git_get_references();
+	my $ref = format_ref_marker($refs, $co{'id'});
 	my $formats_nav =
 		$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff_plain;h=$hash;hp=$hash_parent")}, "plain");
 	git_header_html(undef, $expires);
-	git_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
-	git_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
+	git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
+	git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
 	print "<div class=\"page_body\">\n";
 	my $comment = $co{'comment'};
 	my $empty = 0;
@@ -2169,7 +2370,9 @@ sub git_commitdiff {
 	foreach my $line (@difftree) {
 		# ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M      ls-files.c'
 		# ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M      rev-tree.c'
-		$line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/;
+		if ($line !~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
+			next;
+		}
 		my $from_mode = $1;
 		my $to_mode = $2;
 		my $from_id = $3;
@@ -2183,15 +2386,17 @@ sub git_commitdiff {
 			git_diff_print(undef, "/dev/null", $to_id, "b/$file");
 		} elsif ($status eq "D") {
 			print "<div class=\"diff_info\">" . file_type($from_mode) . ":" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, $from_id) . "(deleted)" .
+			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash_parent;f=$file")}, $from_id) . "(deleted)" .
 			      "</div>\n";
 			git_diff_print($from_id, "a/$file", undef, "/dev/null");
 		} elsif ($status eq "M") {
 			if ($from_id ne $to_id) {
 				print "<div class=\"diff_info\">" .
-				      file_type($from_mode) . ":" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, $from_id) .
+				      file_type($from_mode) . ":" .
+				      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash_parent;f=$file")}, $from_id) .
 				      " -> " .
-				      file_type($to_mode) . ":" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, $to_id);
+				      file_type($to_mode) . ":" .
+				      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, $to_id);
 				print "</div>\n";
 				git_diff_print($from_id, "a/$file",  $to_id, "b/$file");
 			}
@@ -2204,14 +2409,21 @@ sub git_commitdiff {
 
 sub git_commitdiff_plain {
 	mkdir($git_temp, 0700);
+	my %co = parse_commit($hash);
+	if (!%co) {
+		die_error(undef, "Unknown commit object");
+	}
+	if (!defined $hash_parent) {
+		$hash_parent = $co{'parent'} || '--root';
+	}
 	open my $fd, "-|", $GIT, "diff-tree", '-r', $hash_parent, $hash
-		or die_error(undef, "Open git-diff-tree failed.");
+		or die_error(undef, "Open git-diff-tree failed");
 	my @difftree = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading diff-tree failed.");
+	close $fd or die_error(undef, "Reading diff-tree failed");
 
 	# try to figure out the next tag after this commit
 	my $tagname;
-	my $refs = read_info_ref("tags");
+	my $refs = git_get_references("tags");
 	open $fd, "-|", $GIT, "rev-list", "HEAD";
 	my @commits = map { chomp; $_ } <$fd>;
 	close $fd;
@@ -2225,8 +2437,7 @@ sub git_commitdiff_plain {
 	}
 
 	print $cgi->header(-type => "text/plain", -charset => 'utf-8', '-content-disposition' => "inline; filename=\"git-$hash.patch\"");
-	my %co = git_read_commit($hash);
-	my %ad = date_str($co{'author_epoch'}, $co{'author_tz'});
+	my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
 	my $comment = $co{'comment'};
 	print "From: $co{'author'}\n" .
 	      "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n".
@@ -2243,7 +2454,9 @@ sub git_commitdiff_plain {
 	print "---\n\n";
 
 	foreach my $line (@difftree) {
-		$line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/;
+		if ($line !~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)\t(.*)$/) {
+			next;
+		}
 		my $from_id = $3;
 		my $to_id = $4;
 		my $status = $5;
@@ -2260,17 +2473,17 @@ sub git_commitdiff_plain {
 
 sub git_history {
 	if (!defined $hash_base) {
-		$hash_base = git_read_head($project);
+		$hash_base = git_get_head_hash($project);
 	}
 	my $ftype;
-	my %co = git_read_commit($hash_base);
+	my %co = parse_commit($hash_base);
 	if (!%co) {
-		die_error(undef, "Unknown commit object.");
+		die_error(undef, "Unknown commit object");
 	}
-	my $refs = read_info_ref();
+	my $refs = git_get_references();
 	git_header_html();
-	git_page_nav('','', $hash_base,$co{'tree'},$hash_base);
-	git_header_div('commit', esc_html($co{'title'}), $hash_base);
+	git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base);
+	git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
 	if (!defined $hash && defined $file_name) {
 		$hash = git_get_hash_by_path($hash_base, $file_name);
 	}
@@ -2281,56 +2494,22 @@ sub git_history {
 
 	open my $fd, "-|",
 		$GIT, "rev-list", "--full-history", $hash_base, "--", $file_name;
-	print "<table cellspacing=\"0\">\n";
-	my $alternate = 0;
-	while (my $line = <$fd>) {
-		if ($line =~ m/^([0-9a-fA-F]{40})/){
-			my $commit = $1;
-			my %co = git_read_commit($commit);
-			if (!%co) {
-				next;
-			}
-			my $ref = git_get_referencing($refs, $commit);
-			if ($alternate) {
-				print "<tr class=\"dark\">\n";
-			} else {
-				print "<tr class=\"light\">\n";
-			}
-			$alternate ^= 1;
-			print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
-			      "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
-			      "<td>" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"), -class => "list"}, "<b>" .
-			      esc_html(chop_str($co{'title'}, 50)) . "$ref</b>") . "</td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit")}, "commit") .
-			      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
-			      " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$ftype;hb=$commit;f=$file_name")}, $ftype);
-			my $blob = git_get_hash_by_path($hash_base, $file_name);
-			my $blob_parent = git_get_hash_by_path($commit, $file_name);
-			if (defined $blob && defined $blob_parent && $blob ne $blob_parent) {
-				print " | " .
-				$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff;h=$blob;hp=$blob_parent;hb=$commit;f=$file_name")},
-				"diff to current");
-			}
-			print "</td>\n" .
-			      "</tr>\n";
-		}
-	}
-	print "</table>\n";
+	git_history_body($fd, $refs, $hash_base, $ftype);
+
 	close $fd;
 	git_footer_html();
 }
 
 sub git_search {
 	if (!defined $searchtext) {
-		die_error("", "Text field empty.");
+		die_error(undef, "Text field empty");
 	}
 	if (!defined $hash) {
-		$hash = git_read_head($project);
+		$hash = git_get_head_hash($project);
 	}
-	my %co = git_read_commit($hash);
+	my %co = parse_commit($hash);
 	if (!%co) {
-		die_error(undef, "Unknown commit object.");
+		die_error(undef, "Unknown commit object");
 	}
 	# pickaxe may take all resources of your box and run for several minutes
 	# with every query - so decide by yourself how public you make this feature :)
@@ -2347,8 +2526,8 @@ sub git_search {
 		$pickaxe_search = 1;
 	}
 	git_header_html();
-	git_page_nav('','', $hash,$co{'tree'},$hash);
-	git_header_div('commit', esc_html($co{'title'}), $hash);
+	git_print_page_nav('','', $hash,$co{'tree'},$hash);
+	git_print_header_div('commit', esc_html($co{'title'}), $hash);
 
 	print "<table cellspacing=\"0\">\n";
 	my $alternate = 0;
@@ -2366,7 +2545,7 @@ sub git_search {
 				next;
 			}
 			my @commit_lines = split "\n", $commit_text;
-			my %co = git_read_commit(undef, \@commit_lines);
+			my %co = parse_commit(undef, \@commit_lines);
 			if (!%co) {
 				next;
 			}
@@ -2447,7 +2626,7 @@ sub git_search {
 					print "</td>\n" .
 					      "</tr>\n";
 				}
-				%co = git_read_commit($1);
+				%co = parse_commit($1);
 			}
 		}
 		close $fd;
@@ -2457,22 +2636,22 @@ sub git_search {
 }
 
 sub git_shortlog {
-	my $head = git_read_head($project);
+	my $head = git_get_head_hash($project);
 	if (!defined $hash) {
 		$hash = $head;
 	}
 	if (!defined $page) {
 		$page = 0;
 	}
-	my $refs = read_info_ref();
+	my $refs = git_get_references();
 
 	my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
 	open my $fd, "-|", $GIT, "rev-list", $limit, $hash
-		or die_error(undef, "Open git-rev-list failed.");
+		or die_error(undef, "Open git-rev-list failed");
 	my @revlist = map { chomp; $_ } <$fd>;
 	close $fd;
 
-	my $paging_nav = git_get_paging_nav('shortlog', $hash, $head, $page, $#revlist);
+	my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#revlist);
 	my $next_link = '';
 	if ($#revlist >= (100 * ($page+1)-1)) {
 		$next_link =
@@ -2482,8 +2661,8 @@ sub git_shortlog {
 
 
 	git_header_html();
-	git_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
-	git_header_div('summary', $project);
+	git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
+	git_print_header_div('summary', $project);
 
 	git_shortlog_body(\@revlist, ($page * 100), $#revlist, $refs, $next_link);
 
@@ -2495,10 +2674,10 @@ sub git_shortlog {
 
 sub git_rss {
 	# http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
-	open my $fd, "-|", $GIT, "rev-list", "--max-count=150", git_read_head($project)
-		or die_error(undef, "Open git-rev-list failed.");
+	open my $fd, "-|", $GIT, "rev-list", "--max-count=150", git_get_head_hash($project)
+		or die_error(undef, "Open git-rev-list failed");
 	my @revlist = map { chomp; $_ } <$fd>;
-	close $fd or die_error(undef, "Reading rev-list failed.");
+	close $fd or die_error(undef, "Reading git-rev-list failed");
 	print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
 	print "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n".
 	      "<rss version=\"2.0\" xmlns:content=\"http://purl.org/rss/1.0/modules/content/\">\n";
@@ -2510,12 +2689,12 @@ sub git_rss {
 
 	for (my $i = 0; $i <= $#revlist; $i++) {
 		my $commit = $revlist[$i];
-		my %co = git_read_commit($commit);
+		my %co = parse_commit($commit);
 		# we read 150, we always show 30 and the ones more recent than 48 hours
 		if (($i >= 20) && ((time - $co{'committer_epoch'}) > 48*60*60)) {
 			last;
 		}
-		my %cd = date_str($co{'committer_epoch'});
+		my %cd = parse_date($co{'committer_epoch'});
 		open $fd, "-|", $GIT, "diff-tree", '-r', $co{'parent'}, $co{'id'} or next;
 		my @difftree = map { chomp; $_ } <$fd>;
 		close $fd or next;
@@ -2552,7 +2731,7 @@ sub git_rss {
 }
 
 sub git_opml {
-	my @list = git_read_projects();
+	my @list = git_get_projects_list();
 
 	print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
 	print "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n".
@@ -2565,12 +2744,12 @@ sub git_opml {
 
 	foreach my $pr (@list) {
 		my %proj = %$pr;
-		my $head = git_read_head($proj{'path'});
+		my $head = git_get_head_hash($proj{'path'});
 		if (!defined $head) {
 			next;
 		}
 		$ENV{'GIT_DIR'} = "$projectroot/$proj{'path'}";
-		my %co = git_read_commit($head);
+		my %co = parse_commit($head);
 		if (!%co) {
 			next;
 		}