X-Git-Url: https://git.ladys.computer/Gitweb/blobdiff_plain/9c9d435689da11f7e28170a9499e203e9cce56bb61c0846b9adb4e62091435f4..adbdc221dc194ad092eeae4ae89aa88a2e25e2abe9864ad4ccb4e933306365b1:/gitweb.perl

diff --git a/gitweb.perl b/gitweb.perl
index b063714..1972792 100755
--- a/gitweb.perl
+++ b/gitweb.perl
@@ -31,9 +31,6 @@ our $GIT = "++GIT_BINDIR++/git";
 #our $projectroot = "/pub/scm";
 our $projectroot = "++GITWEB_PROJECTROOT++";
 
-# location for temporary files needed for diffs
-our $git_temp = "/tmp/gitweb";
-
 # target of the home link on top of all pages
 our $home_link = $my_uri || "/";
 
@@ -51,6 +48,8 @@ our $home_text = "++GITWEB_HOMETEXT++";
 our $stylesheet = "++GITWEB_CSS++";
 # URI of GIT logo
 our $logo = "++GITWEB_LOGO++";
+# URI of GIT favicon, assumed to be image/png type
+our $favicon = "++GITWEB_FAVICON++";
 
 # source of projects list
 our $projects_list = "++GITWEB_LIST++";
@@ -70,9 +69,16 @@ our $mimetypes_file = undef;
 # You define site-wide feature defaults here; override them with
 # $GITWEB_CONFIG as necessary.
 our %feature = (
-	# feature => {'sub' => feature-sub, 'override' => allow-override, 'default' => [ default options...]
-	# if feature is overridable, feature-sub will be called with default options;
-	# return value indicates if to enable specified feature
+	# feature => {
+	# 	'sub' => feature-sub (subroutine),
+	# 	'override' => allow-override (boolean),
+	# 	'default' => [ default options...] (array reference)}
+	#
+	# if feature is overridable (it means that allow-override has true value,
+	# then feature-sub will be called with default options as parameters;
+	# return value of feature-sub indicates if to enable specified feature
+	#
+	# use gitweb_check_feature(<feature>) to check if <feature> is enabled
 
 	'blame' => {
 		'sub' => \&feature_blame,
@@ -84,6 +90,11 @@ our %feature = (
 		'override' => 0,
 		#         => [content-encoding, suffix, program]
 		'default' => ['x-gzip', 'gz', 'gzip']},
+
+	'pickaxe' => {
+		'sub' => \&feature_pickaxe,
+		'override' => 0,
+		'default' => [1]},
 );
 
 sub gitweb_check_feature {
@@ -98,9 +109,9 @@ sub gitweb_check_feature {
 }
 
 # To enable system wide have in $GITWEB_CONFIG
-# $feature{'blame'}{'default'} =  [1];
-# To have project specific config enable override in  $GITWEB_CONFIG
-# $feature{'blame'}{'override'} =  1;
+# $feature{'blame'}{'default'} = [1];
+# To have project specific config enable override in $GITWEB_CONFIG
+# $feature{'blame'}{'override'} = 1;
 # and in project config gitweb.blame = 0|1;
 
 sub feature_blame {
@@ -116,9 +127,9 @@ sub feature_blame {
 }
 
 # To disable system wide have in $GITWEB_CONFIG
-# $feature{'snapshot'}{'default'} =  [undef];
-# To have project specific config enable override in  $GITWEB_CONFIG
-# $feature{'blame'}{'override'} =  1;
+# $feature{'snapshot'}{'default'} = [undef];
+# To have project specific config enable override in $GITWEB_CONFIG
+# $feature{'blame'}{'override'} = 1;
 # and in project config  gitweb.snapshot = none|gzip|bzip2
 
 sub feature_snapshot {
@@ -137,16 +148,44 @@ sub feature_snapshot {
 	return ($ctype, $suffix, $command);
 }
 
+# To enable system wide have in $GITWEB_CONFIG
+# $feature{'pickaxe'}{'default'} = [1];
+# To have project specific config enable override in $GITWEB_CONFIG
+# $feature{'pickaxe'}{'override'} = 1;
+# and in project config gitweb.pickaxe = 0|1;
+
+sub feature_pickaxe {
+	my ($val) = git_get_project_config('pickaxe', '--bool');
+
+	if ($val eq 'true') {
+		return (1);
+	} elsif ($val eq 'false') {
+		return (0);
+	}
+
+	return ($_[0]);
+}
+
+# rename detection options for git-diff and git-diff-tree
+# - default is '-M', with the cost proportional to
+#   (number of removed files) * (number of new files).
+# - more costly is '-C' (or '-C', '-M'), with the cost proportional to
+#   (number of changed files + number of removed files) * (number of new files)
+# - even more costly is '-C', '--find-copies-harder' with cost
+#   (number of files in the original tree) * (number of new files)
+# - one might want to include '-B' option, e.g. '-B', '-M'
+our @diff_opts = ('-M'); # taken from git_commit
+
 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
-require $GITWEB_CONFIG if -e $GITWEB_CONFIG;
+do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 
 # version of the core git binary
 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 
+# path to the current git repository
+our $git_dir;
+
 $projects_list ||= $projectroot;
-if (! -d $git_temp) {
-	mkdir($git_temp, 0700) || die_error(undef, "Couldn't mkdir $git_temp");
-}
 
 # ======================================================================
 # input validation and dispatch
@@ -173,7 +212,7 @@ if (defined $project) {
 	if (!(-e "$projectroot/$project/HEAD")) {
 		die_error(undef, "No such project");
 	}
-	$ENV{'GIT_DIR'} = "$projectroot/$project";
+	$git_dir = "$projectroot/$project";
 }
 
 our $file_name = $cgi->param('f');
@@ -211,6 +250,13 @@ if (defined $hash_base) {
 	}
 }
 
+our $hash_parent_base = $cgi->param('hpb');
+if (defined $hash_parent_base) {
+	if (!validate_input($hash_parent_base)) {
+		die_error(undef, "Invalid hash parent base parameter");
+	}
+}
+
 our $page = $cgi->param('pg');
 if (defined $page) {
 	if ($page =~ m/[^0-9]$/) {
@@ -270,13 +316,14 @@ sub href(%) {
 	my %params = @_;
 
 	my @mapping = (
-		action => "a",
 		project => "p",
+		action => "a",
 		file_name => "f",
 		file_parent => "fp",
 		hash => "h",
 		hash_parent => "hp",
 		hash_base => "hb",
+		hash_parent_base => "hpb",
 		page => "pg",
 		searchtext => "s",
 	);
@@ -446,7 +493,13 @@ sub mode_str {
 
 # convert file mode in octal to file type string
 sub file_type {
-	my $mode = oct shift;
+	my $mode = shift;
+
+	if ($mode !~ m/^[0-7]+$/) {
+		return $mode;
+	} else {
+		$mode = oct $mode;
+	}
 
 	if (S_ISDIR($mode & S_IFMT)) {
 		return "directory";
@@ -547,21 +600,31 @@ sub format_diff_line {
 ## ----------------------------------------------------------------------
 ## git utility subroutines, invoking git commands
 
+# returns path to the core git executable and the --git-dir parameter as list
+sub git_cmd {
+	return $GIT, '--git-dir='.$git_dir;
+}
+
+# returns path to the core git executable and the --git-dir parameter as string
+sub git_cmd_str {
+	return join(' ', git_cmd());
+}
+
 # get HEAD ref of given project as hash
 sub git_get_head_hash {
 	my $project = shift;
-	my $oENV = $ENV{'GIT_DIR'};
+	my $o_git_dir = $git_dir;
 	my $retval = undef;
-	$ENV{'GIT_DIR'} = "$projectroot/$project";
-	if (open my $fd, "-|", $GIT, "rev-parse", "--verify", "HEAD") {
+	$git_dir = "$projectroot/$project";
+	if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
 		my $head = <$fd>;
 		close $fd;
 		if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
 			$retval = $1;
 		}
 	}
-	if (defined $oENV) {
-		$ENV{'GIT_DIR'} = $oENV;
+	if (defined $o_git_dir) {
+		$git_dir = $o_git_dir;
 	}
 	return $retval;
 }
@@ -570,7 +633,7 @@ sub git_get_head_hash {
 sub git_get_type {
 	my $hash = shift;
 
-	open my $fd, "-|", $GIT, "cat-file", '-t', $hash or return;
+	open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
 	my $type = <$fd>;
 	close $fd or return;
 	chomp $type;
@@ -584,7 +647,7 @@ sub git_get_project_config {
 	$key =~ s/^gitweb\.//;
 	return if ($key =~ m/\W/);
 
-	my @x = ($GIT, 'repo-config');
+	my @x = (git_cmd(), 'repo-config');
 	if (defined $type) { push @x, $type; }
 	push @x, "--get";
 	push @x, "gitweb.$key";
@@ -600,7 +663,7 @@ sub git_get_hash_by_path {
 
 	my $tree = $base;
 
-	open my $fd, "-|", $GIT, "ls-tree", $base, "--", $path
+	open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
 		or die_error(undef, "Open git-ls-tree failed");
 	my $line = <$fd>;
 	close $fd or return undef;
@@ -731,7 +794,7 @@ sub git_get_references {
 		open $fd, "$projectroot/$project/info/refs"
 			or return;
 	} else {
-		open $fd, "-|", $GIT, "ls-remote", "."
+		open $fd, "-|", git_cmd(), "ls-remote", "."
 			or return;
 	}
 
@@ -749,61 +812,10 @@ sub git_get_references {
 	return \%refs;
 }
 
-sub git_get_following_references {
-	my $hash = shift || return undef;
-	my $type = shift;
-	my $base = shift || $hash_base || "HEAD";
-
-	my $refs = git_get_references($type);
-	open my $fd, "-|", $GIT, "rev-list", $base
-		or return undef;
-	my @commits = map { chomp; $_ } <$fd>;
-	close $fd
-		or return undef;
-
-	my @reflist;
-	my $lastref;
-
-	foreach my $commit (@commits) {
-		foreach my $ref (@{$refs->{$commit}}) {
-			$lastref = $ref;
-			push @reflist, $lastref;
-		}
-		if ($commit eq $hash) {
-			last;
-		}
-	}
-
-	return wantarray ? @reflist : $lastref;
-}
-
-sub git_get_preceding_references {
-	my $hash = shift || return undef;
-	my $type = shift;
-
-	my $refs = git_get_references($type);
-	open my $fd, "-|", $GIT, "rev-list", $hash
-		or return undef;
-	my @commits = map { chomp; $_ } <$fd>;
-	close $fd
-		or return undef;
-
-	my @reflist;
-
-	foreach my $commit (@commits) {
-		foreach my $ref (@{$refs->{$commit}}) {
-			return $ref unless wantarray;
-			push @reflist, $ref;
-		}
-	}
-
-	return @reflist;
-}
-
 sub git_get_rev_name_tags {
 	my $hash = shift || return undef;
 
-	open my $fd, "-|", $GIT, "name-rev", "--tags", $hash
+	open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
 		or return;
 	my $name_rev = <$fd>;
 	close $fd;
@@ -851,7 +863,7 @@ sub parse_tag {
 	my %tag;
 	my @comment;
 
-	open my $fd, "-|", $GIT, "cat-file", "tag", $tag_id or return;
+	open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
 	$tag{'id'} = $tag_id;
 	while (my $line = <$fd>) {
 		chomp $line;
@@ -892,7 +904,7 @@ sub parse_commit {
 		@commit_lines = @$commit_text;
 	} else {
 		$/ = "\0";
-		open my $fd, "-|", $GIT, "rev-list", "--header", "--parents", "--max-count=1", $commit_id
+		open my $fd, "-|", git_cmd(), "rev-list", "--header", "--parents", "--max-count=1", $commit_id
 			or return;
 		@commit_lines = split '\n', <$fd>;
 		close $fd or return;
@@ -1040,9 +1052,30 @@ sub parse_difftree_raw_line {
 		}
 	}
 	# 'c512b523472485aef4fff9e57b229d9d243c967f'
-	#elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
-	#	$res{'commit'} = $1;
-	#}
+	elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
+		$res{'commit'} = $1;
+	}
+
+	return wantarray ? %res : \%res;
+}
+
+# parse line of git-ls-tree output
+sub parse_ls_tree_line ($;%) {
+	my $line = shift;
+	my %opts = @_;
+	my %res;
+
+	#'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa	panic.c'
+	$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/;
+
+	$res{'mode'} = $1;
+	$res{'type'} = $2;
+	$res{'hash'} = $3;
+	if ($opts{'-z'}) {
+		$res{'name'} = $4;
+	} else {
+		$res{'name'} = unquote($4);
+	}
 
 	return wantarray ? %res : \%res;
 }
@@ -1214,6 +1247,9 @@ EOF
 		       'href="%s" type="application/rss+xml"/>'."\n",
 		       esc_param($project), href(action=>"rss"));
 	}
+	if (defined $favicon) {
+		print qq(<link rel="shortcut icon" href="$favicon" type="image/png"/>\n);
+	}
 
 	print "</head>\n" .
 	      "<body>\n" .
@@ -1367,6 +1403,24 @@ sub git_print_header_div {
 	      "\n</div>\n";
 }
 
+#sub git_print_authorship (\%) {
+sub git_print_authorship {
+	my $co = shift;
+
+	my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
+	print "<div class=\"author_date\">" .
+	      esc_html($co->{'author_name'}) .
+	      " [$ad{'rfc2822'}";
+	if ($ad{'hour_local'} < 6) {
+		printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
+		       $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+	} else {
+		printf(" (%02d:%02d %s)",
+		       $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+	}
+	print "]</div>\n";
+}
+
 sub git_print_page_path {
 	my $name = shift;
 	my $type = shift;
@@ -1374,25 +1428,44 @@ sub git_print_page_path {
 
 	if (!defined $name) {
 		print "<div class=\"page_path\">/</div>\n";
-	} elsif (defined $type && $type eq 'blob') {
+	} else {
+		my @dirname = split '/', $name;
+		my $basename = pop @dirname;
+		my $fullname = '';
+
 		print "<div class=\"page_path\">";
-		if (defined $hb) {
+		foreach my $dir (@dirname) {
+			$fullname .= $dir . '/';
+			print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
+			                             hash_base=>$hb),
+			              -title => $fullname}, esc_html($dir));
+			print "/";
+		}
+		if (defined $type && $type eq 'blob') {
 			print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
-			                             hash_base=>$hb)},
-			              esc_html($name));
+			                             hash_base=>$hb),
+			              -title => $name}, esc_html($basename));
+		} elsif (defined $type && $type eq 'tree') {
+			print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
+			                             hash_base=>$hb),
+			              -title => $name}, esc_html($basename));
+			print "/";
 		} else {
-			print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name)},
-			              esc_html($name));
+			print esc_html($basename);
 		}
 		print "<br/></div>\n";
-	} else {
-		print "<div class=\"page_path\">" . esc_html($name) . "<br/></div>\n";
 	}
 }
 
-sub git_print_log {
+# sub git_print_log (\@;%) {
+sub git_print_log ($;%) {
 	my $log = shift;
+	my %opts = @_;
 
+	if ($opts{'-remove_title'}) {
+		# remove title, i.e. first line of log
+		shift @$log;
+	}
 	# remove leading empty lines
 	while (defined $log->[0] && $log->[0] eq "") {
 		shift @$log;
@@ -1402,6 +1475,20 @@ sub git_print_log {
 	my $signoff = 0;
 	my $empty = 0;
 	foreach my $line (@$log) {
+		if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
+			$signoff = 1;
+			$empty = 0;
+			if (! $opts{'-remove_signoff'}) {
+				print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
+				next;
+			} else {
+				# remove signoff lines
+				next;
+			}
+		} else {
+			$signoff = 0;
+		}
+
 		# print only one empty line
 		# do not print empty line after signoff
 		if ($line eq "") {
@@ -1410,13 +1497,13 @@ sub git_print_log {
 		} else {
 			$empty = 0;
 		}
-		if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
-			$signoff = 1;
-			print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
-		} else {
-			$signoff = 0;
-			print format_log_line_html($line) . "<br/>\n";
-		}
+
+		print format_log_line_html($line) . "<br/>\n";
+	}
+
+	if ($opts{'-final_empty_line'}) {
+		# end with single empty line
+		print "<br/>\n" unless $empty;
 	}
 }
 
@@ -1424,30 +1511,65 @@ sub git_print_simplified_log {
 	my $log = shift;
 	my $remove_title = shift;
 
-	shift @$log if $remove_title;
-	# remove leading empty lines
-	while (defined $log->[0] && $log->[0] eq "") {
-		shift @$log;
-	}
+	git_print_log($log,
+		-final_empty_line=> 1,
+		-remove_title => $remove_title);
+}
 
-	# simplify and print log
-	my $empty = 0;
-	foreach my $line (@$log) {
-		# remove signoff lines
-		if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
-			next;
+# print tree entry (row of git_tree), but without encompassing <tr> element
+sub git_print_tree_entry {
+	my ($t, $basedir, $hash_base, $have_blame) = @_;
+
+	my %base_key = ();
+	$base_key{hash_base} = $hash_base if defined $hash_base;
+
+	print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
+	if ($t->{'type'} eq "blob") {
+		print "<td class=\"list\">" .
+		      $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
+		                             file_name=>"$basedir$t->{'name'}", %base_key),
+		              -class => "list"}, esc_html($t->{'name'})) .
+		      "</td>\n" .
+		      "<td class=\"link\">" .
+		      $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
+		                             file_name=>"$basedir$t->{'name'}", %base_key)},
+		              "blob");
+		if ($have_blame) {
+			print " | " .
+				$cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
+				                       file_name=>"$basedir$t->{'name'}", %base_key)},
+				        "blame");
 		}
-		# print only one empty line
-		if ($line eq "") {
-			next if $empty;
-			$empty = 1;
-		} else {
-			$empty = 0;
+		if (defined $hash_base) {
+			print " | " .
+			      $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
+			                             hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
+			              "history");
 		}
-		print format_log_line_html($line) . "<br/>\n";
+		print " | " .
+		      $cgi->a({-href => href(action=>"blob_plain",
+		                             hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
+		              "raw") .
+		      "</td>\n";
+
+	} elsif ($t->{'type'} eq "tree") {
+		print "<td class=\"list\">" .
+		      $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
+		                             file_name=>"$basedir$t->{'name'}", %base_key)},
+		              esc_html($t->{'name'})) .
+		      "</td>\n" .
+		      "<td class=\"link\">" .
+		      $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
+		                             file_name=>"$basedir$t->{'name'}", %base_key)},
+		              "tree");
+		if (defined $hash_base) {
+			print " | " .
+			      $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
+			                             file_name=>"$basedir$t->{'name'}")},
+			              "history");
+		}
+		print "</td>\n";
 	}
-	# end with single empty line
-	print "<br/>\n" unless $empty;
 }
 
 ## ......................................................................
@@ -1464,6 +1586,7 @@ sub git_difftree_body {
 
 	print "<table class=\"diff_tree\">\n";
 	my $alternate = 0;
+	my $patchno = 0;
 	foreach my $line (@{$difftree}) {
 		my %diff = parse_difftree_raw_line($line);
 
@@ -1504,8 +1627,14 @@ sub git_difftree_body {
 			      "<td class=\"link\">" .
 			      $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
 			                             hash_base=>$hash, file_name=>$diff{'file'})},
-			              "blob") .
-			      "</td>\n";
+			              "blob");
+			if ($action eq 'commitdiff') {
+				# link to patch
+				$patchno++;
+				print " | " .
+				      $cgi->a({-href => "#patch$patchno"}, "patch");
+			}
+			print "</td>\n";
 
 		} elsif ($diff{'status'} eq "D") { # deleted
 			my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
@@ -1519,9 +1648,15 @@ sub git_difftree_body {
 			      $cgi->a({-href => href(action=>"blob", hash=>$diff{'from_id'},
 			                             hash_base=>$parent, file_name=>$diff{'file'})},
 			              "blob") .
-			      " | " .
-			      $cgi->a({-href => href(action=>"history", hash_base=>$parent,
-			                             file_name=>$diff{'file'})},\
+			      " | ";
+			if ($action eq 'commitdiff') {
+				# link to patch
+				$patchno++;
+				print " | " .
+				      $cgi->a({-href => "#patch$patchno"}, "patch");
+			}
+			print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
+			                             file_name=>$diff{'file'})},
 			              "history") .
 			      "</td>\n";
 
@@ -1543,8 +1678,10 @@ sub git_difftree_body {
 			}
 			print "<td>";
 			if ($diff{'to_id'} ne $diff{'from_id'}) { # modified
-				print $cgi->a({-href => href(action=>"blobdiff", hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
-				                             hash_base=>$hash, file_name=>$diff{'file'}),
+				print $cgi->a({-href => href(action=>"blobdiff",
+				                             hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
+				                             hash_base=>$hash, hash_parent_base=>$parent,
+				                             file_name=>$diff{'file'}),
 				              -class => "list"}, esc_html($diff{'file'}));
 			} else { # only mode changed
 				print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
@@ -1554,14 +1691,23 @@ sub git_difftree_body {
 			print "</td>\n" .
 			      "<td>$mode_chnge</td>\n" .
 			      "<td class=\"link\">" .
-				$cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
-				                       hash_base=>$hash, file_name=>$diff{'file'})},
-				        "blob");
+			      $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+			                             hash_base=>$hash, file_name=>$diff{'file'})},
+			              "blob");
 			if ($diff{'to_id'} ne $diff{'from_id'}) { # modified
-				print " | " .
-					$cgi->a({-href => href(action=>"blobdiff", hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
-					                       hash_base=>$hash, file_name=>$diff{'file'})},
-					        "diff");
+				if ($action eq 'commitdiff') {
+					# link to patch
+					$patchno++;
+					print " | " .
+						$cgi->a({-href => "#patch$patchno"}, "patch");
+				} else {
+					print " | " .
+						$cgi->a({-href => href(action=>"blobdiff",
+						                       hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
+						                       hash_base=>$hash, hash_parent_base=>$parent,
+						                       file_name=>$diff{'file'})},
+						        "diff");
+				}
 			}
 			print " | " .
 				$cgi->a({-href => href(action=>"history",
@@ -1591,11 +1737,19 @@ sub git_difftree_body {
 			                             hash=>$diff{'to_id'}, file_name=>$diff{'to_file'})},
 			              "blob");
 			if ($diff{'to_id'} ne $diff{'from_id'}) {
-				print " | " .
-					$cgi->a({-href => href(action=>"blobdiff", hash_base=>$hash,
-					                       hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
-					                       file_name=>$diff{'to_file'}, file_parent=>$diff{'from_file'})},
-					        "diff");
+				if ($action eq 'commitdiff') {
+					# link to patch
+					$patchno++;
+					print " | " .
+						$cgi->a({-href => "#patch$patchno"}, "patch");
+				} else {
+					print " | " .
+						$cgi->a({-href => href(action=>"blobdiff",
+						                       hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
+						                       hash_base=>$hash, hash_parent_base=>$parent,
+						                       file_name=>$diff{'to_file'}, file_parent=>$diff{'from_file'})},
+						        "diff");
+				}
 			}
 			print "</td>\n";
 
@@ -1611,12 +1765,12 @@ sub git_patchset_body {
 	my $patch_idx = 0;
 	my $in_header = 0;
 	my $patch_found = 0;
-	my %diffinfo;
+	my $diffinfo;
 
 	print "<div class=\"patchset\">\n";
 
 	LINE:
-	while (my $patch_line @$fd>) {
+	while (my $patch_line = <$fd>) {
 		chomp $patch_line;
 
 		if ($patch_line =~ m/^diff /) { # "git diff" header
@@ -1628,56 +1782,62 @@ sub git_patchset_body {
 				# first patch in patchset
 				$patch_found = 1;
 			}
-			print "<div class=\"patch\">\n";
+			print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
 
-			%diffinfo = parse_difftree_raw_line($difftree->[$patch_idx++]);
+			if (ref($difftree->[$patch_idx]) eq "HASH") {
+				$diffinfo = $difftree->[$patch_idx];
+			} else {
+				$diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
+			}
+			$patch_idx++;
 
 			# for now, no extended header, hence we skip empty patches
 			# companion to	next LINE if $in_header;
-			if ($diffinfo{'from_id'} eq $diffinfo{'to_id'}) { # no change
+			if ($diffinfo->{'from_id'} eq $diffinfo->{'to_id'}) { # no change
 				$in_header = 1;
 				next LINE;
 			}
 
-			if ($diffinfo{'status'} eq "A") { # added
-				print "<div class=\"diff_info\">" . file_type($diffinfo{'to_mode'}) . ":" .
+			if ($diffinfo->{'status'} eq "A") { # added
+				print "<div class=\"diff_info\">" . file_type($diffinfo->{'to_mode'}) . ":" .
 				      $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
-				                             hash=>$diffinfo{'to_id'}, file_name=>$diffinfo{'file'})},
-				              $diffinfo{'to_id'}) . "(new)" .
+				                             hash=>$diffinfo->{'to_id'}, file_name=>$diffinfo->{'file'})},
+				              $diffinfo->{'to_id'}) . "(new)" .
 				      "</div>\n"; # class="diff_info"
 
-			} elsif ($diffinfo{'status'} eq "D") { # deleted
-				print "<div class=\"diff_info\">" . file_type($diffinfo{'from_mode'}) . ":" .
+			} elsif ($diffinfo->{'status'} eq "D") { # deleted
+				print "<div class=\"diff_info\">" . file_type($diffinfo->{'from_mode'}) . ":" .
 				      $cgi->a({-href => href(action=>"blob", hash_base=>$hash_parent,
-				                             hash=>$diffinfo{'from_id'}, file_name=>$diffinfo{'file'})},
-				              $diffinfo{'from_id'}) . "(deleted)" .
+				                             hash=>$diffinfo->{'from_id'}, file_name=>$diffinfo->{'file'})},
+				              $diffinfo->{'from_id'}) . "(deleted)" .
 				      "</div>\n"; # class="diff_info"
 
-			} elsif ($diffinfo{'status'} eq "R" || # renamed
-			         $diffinfo{'status'} eq "C") { # copied
+			} elsif ($diffinfo->{'status'} eq "R" || # renamed
+			         $diffinfo->{'status'} eq "C" || # copied
+			         $diffinfo->{'status'} eq "2") { # with two filenames (from git_blobdiff)
 				print "<div class=\"diff_info\">" .
-				      file_type($diffinfo{'from_mode'}) . ":" .
+				      file_type($diffinfo->{'from_mode'}) . ":" .
 				      $cgi->a({-href => href(action=>"blob", hash_base=>$hash_parent,
-				                             hash=>$diffinfo{'from_id'}, file_name=>$diffinfo{'from_file'})},
-				              $diffinfo{'from_id'}) .
+				                             hash=>$diffinfo->{'from_id'}, file_name=>$diffinfo->{'from_file'})},
+				              $diffinfo->{'from_id'}) .
 				      " -> " .
-				      file_type($diffinfo{'to_mode'}) . ":" .
+				      file_type($diffinfo->{'to_mode'}) . ":" .
 				      $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
-				                             hash=>$diffinfo{'to_id'}, file_name=>$diffinfo{'to_file'})},
-				              $diffinfo{'to_id'});
+				                             hash=>$diffinfo->{'to_id'}, file_name=>$diffinfo->{'to_file'})},
+				              $diffinfo->{'to_id'});
 				print "</div>\n"; # class="diff_info"
 
 			} else { # modified, mode changed, ...
 				print "<div class=\"diff_info\">" .
-				      file_type($diffinfo{'from_mode'}) . ":" .
+				      file_type($diffinfo->{'from_mode'}) . ":" .
 				      $cgi->a({-href => href(action=>"blob", hash_base=>$hash_parent,
-				                             hash=>$diffinfo{'from_id'}, file_name=>$diffinfo{'file'})},
-				              $diffinfo{'from_id'}) .
+				                             hash=>$diffinfo->{'from_id'}, file_name=>$diffinfo->{'file'})},
+				              $diffinfo->{'from_id'}) .
 				      " -> " .
-				      file_type($diffinfo{'to_mode'}) . ":" .
+				      file_type($diffinfo->{'to_mode'}) . ":" .
 				      $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
-				                             hash=>$diffinfo{'to_id'}, file_name=>$diffinfo{'file'})},
-				              $diffinfo{'to_id'});
+				                             hash=>$diffinfo->{'to_id'}, file_name=>$diffinfo->{'file'})},
+				              $diffinfo->{'to_id'});
 				print "</div>\n"; # class="diff_info"
 			}
 
@@ -1688,8 +1848,30 @@ sub git_patchset_body {
 
 
 		if ($in_header && $patch_line =~ m/^---/) {
-			#print "</div>\n"
+			#print "</div>\n"; # class="diff extended_header"
 			$in_header = 0;
+
+			my $file = $diffinfo->{'from_file'};
+			$file  ||= $diffinfo->{'file'};
+			$file = $cgi->a({-href => href(action=>"blob", hash_base=>$hash_parent,
+			                               hash=>$diffinfo->{'from_id'}, file_name=>$file),
+			                -class => "list"}, esc_html($file));
+			$patch_line =~ s|a/.*$|a/$file|g;
+			print "<div class=\"diff from_file\">$patch_line</div>\n";
+
+			$patch_line = <$fd>;
+			chomp $patch_line;
+
+			#$patch_line =~ m/^+++/;
+			$file    = $diffinfo->{'to_file'};
+			$file  ||= $diffinfo->{'file'};
+			$file = $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
+			                               hash=>$diffinfo->{'to_id'}, file_name=>$file),
+			                -class => "list"}, esc_html($file));
+			$patch_line =~ s|b/.*|b/$file|g;
+			print "<div class=\"diff to_file\">$patch_line</div>\n";
+
+			next LINE;
 		}
 		next LINE if $in_header;
 
@@ -1793,8 +1975,10 @@ sub git_history_body {
 			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)},
+					$cgi->a({-href => href(action=>"blobdiff",
+					                       hash=>$blob_current, hash_parent=>$blob_parent,
+					                       hash_base=>$hash_base, hash_parent_base=>$commit,
+					                       file_name=>$file_name)},
 					        "diff to current");
 			}
 		}
@@ -1906,77 +2090,6 @@ sub git_heads_body {
 	print "</table>\n";
 }
 
-## ----------------------------------------------------------------------
-## functions printing large fragments, format as one of arguments
-
-sub git_diff_print {
-	my $from = shift;
-	my $from_name = shift;
-	my $to = shift;
-	my $to_name = shift;
-	my $format = shift || "html";
-
-	my $from_tmp = "/dev/null";
-	my $to_tmp = "/dev/null";
-	my $pid = $$;
-
-	# create tmp from-file
-	if (defined $from) {
-		$from_tmp = "$git_temp/gitweb_" . $$ . "_from";
-		open my $fd2, "> $from_tmp";
-		open my $fd, "-|", $GIT, "cat-file", "blob", $from;
-		my @file = <$fd>;
-		print $fd2 @file;
-		close $fd2;
-		close $fd;
-	}
-
-	# create tmp to-file
-	if (defined $to) {
-		$to_tmp = "$git_temp/gitweb_" . $$ . "_to";
-		open my $fd2, "> $to_tmp";
-		open my $fd, "-|", $GIT, "cat-file", "blob", $to;
-		my @file = <$fd>;
-		print $fd2 @file;
-		close $fd2;
-		close $fd;
-	}
-
-	open my $fd, "-|", "/usr/bin/diff -u -p -L \'$from_name\' -L \'$to_name\' $from_tmp $to_tmp";
-	if ($format eq "plain") {
-		undef $/;
-		print <$fd>;
-		$/ = "\n";
-	} else {
-		while (my $line = <$fd>) {
-			chomp $line;
-			my $char = substr($line, 0, 1);
-			my $diff_class = "";
-			if ($char eq '+') {
-				$diff_class = " add";
-			} elsif ($char eq "-") {
-				$diff_class = " rem";
-			} elsif ($char eq "@") {
-				$diff_class = " chunk_header";
-			} elsif ($char eq "\\") {
-				# skip errors
-				next;
-			}
-			$line = untabify($line);
-			print "<div class=\"diff$diff_class\">" . esc_html($line) . "</div>\n";
-		}
-	}
-	close $fd;
-
-	if (defined $from) {
-		unlink($from_tmp);
-	}
-	if (defined $to) {
-		unlink($to_tmp);
-	}
-}
-
-
 ## ======================================================================
 ## ======================================================================
 ## actions
@@ -1997,7 +2110,7 @@ sub git_project_list {
 		if (!defined $head) {
 			next;
 		}
-		$ENV{'GIT_DIR'} = "$projectroot/$pr->{'path'}";
+		$git_dir = "$projectroot/$pr->{'path'}";
 		my %co = parse_commit($head);
 		if (!%co) {
 			next;
@@ -2116,7 +2229,8 @@ sub git_summary {
 	}
 	print "</table>\n";
 
-	open my $fd, "-|", $GIT, "rev-list", "--max-count=17", git_get_head_hash($project)
+	open my $fd, "-|", git_cmd(), "rev-list", "--max-count=17",
+		git_get_head_hash($project)
 		or die_error(undef, "Open git-rev-list failed");
 	my @revlist = map { chomp; $_ } <$fd>;
 	close $fd;
@@ -2178,7 +2292,8 @@ sub git_blame2 {
 	my $fd;
 	my $ftype;
 
-	if (!gitweb_check_feature('blame')) {
+	my ($have_blame) = gitweb_check_feature('blame');
+	if (!$have_blame) {
 		die_error('403 Permission denied', "Permission denied");
 	}
 	die_error('404 Not Found', "File name not defined") if (!$file_name);
@@ -2194,7 +2309,7 @@ sub git_blame2 {
 	if ($ftype !~ "blob") {
 		die_error("400 Bad Request", "Object is not a blob");
 	}
-	open ($fd, "-|", $GIT, "blame", '-l', $file_name, $hash_base)
+	open ($fd, "-|", git_cmd(), "blame", '-l', $file_name, $hash_base)
 		or die_error(undef, "Open git-blame failed");
 	git_header_html();
 	my $formats_nav =
@@ -2247,7 +2362,8 @@ HTML
 sub git_blame {
 	my $fd;
 
-	if (!gitweb_check_feature('blame')) {
+	my ($have_blame) = gitweb_check_feature('blame');
+	if (!$have_blame) {
 		die_error('403 Permission denied', "Permission denied");
 	}
 	die_error('404 Not Found', "File name not defined") if (!$file_name);
@@ -2259,7 +2375,7 @@ sub git_blame {
 		$hash = git_get_hash_by_path($hash_base, $file_name, "blob")
 			or die_error(undef, "Error lookup file");
 	}
-	open ($fd, "-|", $GIT, "annotate", '-l', '-t', '-r', $file_name, $hash_base)
+	open ($fd, "-|", git_cmd(), "annotate", '-l', '-t', '-r', $file_name, $hash_base)
 		or die_error(undef, "Open git-annotate failed");
 	git_header_html();
 	my $formats_nav =
@@ -2299,7 +2415,7 @@ HTML
 		chomp $line;
 		$line_class_num = ($line_class_num + 1) % $line_class_len;
 
-		if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) \+\d\d\d\d\t(\d+)\)(.*)$/) {
+		if ($line =~ m/^([0-9a-fA-F]{40})\t\(\s*([^\t]+)\t(\d+) [+-]\d\d\d\d\t(\d+)\)(.*)$/) {
 			$long_rev = $1;
 			$author   = $2;
 			$time     = $3;
@@ -2364,6 +2480,12 @@ sub git_heads {
 }
 
 sub git_blob_plain {
+	# blobs defined by non-textual hash id's can be cached
+	my $expires;
+	if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
+		$expires = "+1d";
+	}
+
 	if (!defined $hash) {
 		if (defined $file_name) {
 			my $base = $hash_base || git_get_head_hash($project);
@@ -2374,7 +2496,7 @@ sub git_blob_plain {
 		}
 	}
 	my $type = shift;
-	open my $fd, "-|", $GIT, "cat-file", "blob", $hash
+	open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
 		or die_error(undef, "Couldn't cat $file_name, $hash");
 
 	$type ||= blob_mimetype($fd, $file_name);
@@ -2387,8 +2509,10 @@ sub git_blob_plain {
 		$save_as .= '.txt';
 	}
 
-	print $cgi->header(-type => "$type",
-	                   -content_disposition => "inline; filename=\"$save_as\"");
+	print $cgi->header(
+		-type => "$type",
+		-expires=>$expires,
+		-content_disposition => "inline; filename=\"$save_as\"");
 	undef $/;
 	binmode STDOUT, ':raw';
 	print <$fd>;
@@ -2398,6 +2522,12 @@ sub git_blob_plain {
 }
 
 sub git_blob {
+	# blobs defined by non-textual hash id's can be cached
+	my $expires;
+	if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
+		$expires = "+1d";
+	}
+
 	if (!defined $hash) {
 		if (defined $file_name) {
 			my $base = $hash_base || git_get_head_hash($project);
@@ -2407,15 +2537,15 @@ sub git_blob {
 			die_error(undef, "No file name defined");
 		}
 	}
-	my $have_blame = gitweb_check_feature('blame');
-	open my $fd, "-|", $GIT, "cat-file", "blob", $hash
+	my ($have_blame) = gitweb_check_feature('blame');
+	open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
 		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();
+	git_header_html(undef, $expires);
 	my $formats_nav = '';
 	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
 		if (defined $file_name) {
@@ -2473,7 +2603,7 @@ sub git_tree {
 		}
 	}
 	$/ = "\0";
-	open my $fd, "-|", $GIT, "ls-tree", '-z', $hash
+	open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
 		or die_error(undef, "Open git-ls-tree failed");
 	my @entries = map { chomp; $_ } <$fd>;
 	close $fd or die_error(undef, "Reading tree failed");
@@ -2482,14 +2612,13 @@ sub git_tree {
 	my $refs = git_get_references();
 	my $ref = format_ref_marker($refs, $hash_base);
 	git_header_html();
-	my %base_key = ();
 	my $base = "";
-	my $have_blame = gitweb_check_feature('blame');
+	my ($have_blame) = gitweb_check_feature('blame');
 	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
-		$base_key{hash_base} = $hash_base;
 		git_print_page_nav('tree','', $hash_base);
 		git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
 	} else {
+		undef $hash_base;
 		print "<div class=\"page_nav\">\n";
 		print "<br/><br/></div>\n";
 		print "<div class=\"title\">$hash</div>\n";
@@ -2502,54 +2631,17 @@ sub git_tree {
 	print "<table cellspacing=\"0\">\n";
 	my $alternate = 0;
 	foreach my $line (@entries) {
-		#'100644	blob	0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa	panic.c'
-		$line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/;
-		my $t_mode = $1;
-		my $t_type = $2;
-		my $t_hash = $3;
-		my $t_name = validate_input($4);
+		my %t = parse_ls_tree_line($line, -z => 1);
+
 		if ($alternate) {
 			print "<tr class=\"dark\">\n";
 		} else {
 			print "<tr class=\"light\">\n";
 		}
 		$alternate ^= 1;
-		print "<td class=\"mode\">" . mode_str($t_mode) . "</td>\n";
-		if ($t_type eq "blob") {
-			print "<td class=\"list\">" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$t_hash, file_name=>"$base$t_name", %base_key),
-			              -class => "list"}, esc_html($t_name)) .
-			      "</td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => href(action=>"blob", hash=>$t_hash, file_name=>"$base$t_name", %base_key)},
-			              "blob");
-			if ($have_blame) {
-				print " | " .
-					$cgi->a({-href => href(action=>"blame", hash=>$t_hash, file_name=>"$base$t_name", %base_key)},
-					        "blame");
-			}
-			print " | " .
-			      $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
-			                             hash=>$t_hash, file_name=>"$base$t_name")},
-			              "history") .
-			      " | " .
-			      $cgi->a({-href => href(action=>"blob_plain",
-			                             hash=>$t_hash, file_name=>"$base$t_name")},
-			              "raw") .
-			      "</td>\n";
-		} elsif ($t_type eq "tree") {
-			print "<td class=\"list\">" .
-			      $cgi->a({-href => href(action=>"tree", hash=>$t_hash, file_name=>"$base$t_name", %base_key)},
-			              esc_html($t_name)) .
-			      "</td>\n" .
-			      "<td class=\"link\">" .
-			      $cgi->a({-href => href(action=>"tree", hash=>$t_hash, file_name=>"$base$t_name", %base_key)},
-			              "tree") .
-			      " | " .
-			      $cgi->a({-href => href(action=>"history", hash_base=>$hash_base, file_name=>"$base$t_name")},
-			              "history") .
-			      "</td>\n";
-		}
+
+		git_print_tree_entry(\%t, $base, $hash_base, $have_blame);
+
 		print "</tr>\n";
 	}
 	print "</table>\n" .
@@ -2576,7 +2668,8 @@ sub git_snapshot {
 	                   -content_disposition => "inline; filename=\"$filename\"",
 	                   -status => '200 OK');
 
-	open my $fd, "-|", "$GIT tar-tree $hash \'$project\' | $command" or
+	my $git_command = git_cmd_str();
+	open my $fd, "-|", "$git_command tar-tree $hash \'$project\' | $command" or
 		die_error(undef, "Execute git-tar-tree failed.");
 	binmode STDOUT, ':raw';
 	print <$fd>;
@@ -2596,7 +2689,7 @@ sub git_log {
 	my $refs = git_get_references();
 
 	my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
-	open my $fd, "-|", $GIT, "rev-list", $limit, $hash
+	open my $fd, "-|", git_cmd(), "rev-list", $limit, $hash
 		or die_error(undef, "Open git-rev-list failed");
 	my @revlist = map { chomp; $_ } <$fd>;
 	close $fd;
@@ -2651,7 +2744,7 @@ sub git_commit {
 	if (!defined $parent) {
 		$parent = "--root";
 	}
-	open my $fd, "-|", $GIT, "diff-tree", '-r', '-M', $parent, $hash
+	open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts, $parent, $hash
 		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");
@@ -2729,7 +2822,7 @@ sub git_commit {
 		      "<td class=\"link\">" .
 		      $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
 		      " | " .
-		      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "commitdiff") .
+		      $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
 		      "</td>" .
 		      "</tr>\n";
 	}
@@ -2746,41 +2839,171 @@ sub git_commit {
 }
 
 sub git_blobdiff {
-	mkdir($git_temp, 0700);
-	git_header_html();
-	if (defined $hash_base && (my %co = parse_commit($hash_base))) {
+	my $format = shift || 'html';
+
+	my $fd;
+	my @difftree;
+	my %diffinfo;
+	my $expires;
+
+	# preparing $fd and %diffinfo for git_patchset_body
+	# new style URI
+	if (defined $hash_base && defined $hash_parent_base) {
+		if (defined $file_name) {
+			# read raw output
+			open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts, $hash_parent_base, $hash_base,
+				"--", $file_name
+				or die_error(undef, "Open git-diff-tree failed");
+			@difftree = map { chomp; $_ } <$fd>;
+			close $fd
+				or die_error(undef, "Reading git-diff-tree failed");
+			@difftree
+				or die_error('404 Not Found', "Blob diff not found");
+
+		} elsif (defined $hash &&
+		         $hash =~ /[0-9a-fA-F]{40}/) {
+			# try to find filename from $hash
+
+			# read filtered raw output
+			open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts, $hash_parent_base, $hash_base
+				or die_error(undef, "Open git-diff-tree failed");
+			@difftree =
+				# ':100644 100644 03b21826... 3b93d5e7... M	ls-files.c'
+				# $hash == to_id
+				grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
+				map { chomp; $_ } <$fd>;
+			close $fd
+				or die_error(undef, "Reading git-diff-tree failed");
+			@difftree
+				or die_error('404 Not Found', "Blob diff not found");
+
+		} else {
+			die_error('404 Not Found', "Missing one of the blob diff parameters");
+		}
+
+		if (@difftree > 1) {
+			die_error('404 Not Found', "Ambiguous blob diff specification");
+		}
+
+		%diffinfo = parse_difftree_raw_line($difftree[0]);
+		$file_parent ||= $diffinfo{'from_file'} || $file_name || $diffinfo{'file'};
+		$file_name   ||= $diffinfo{'to_file'}   || $diffinfo{'file'};
+
+		$hash_parent ||= $diffinfo{'from_id'};
+		$hash        ||= $diffinfo{'to_id'};
+
+		# non-textual hash id's can be cached
+		if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
+		    $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
+			$expires = '+1d';
+		}
+
+		# open patch output
+		open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+			'-p', $hash_parent_base, $hash_base,
+			"--", $file_name
+			or die_error(undef, "Open git-diff-tree failed");
+	}
+
+	# old/legacy style URI
+	if (!%diffinfo && # if new style URI failed
+	    defined $hash && defined $hash_parent) {
+		# fake git-diff-tree raw output
+		$diffinfo{'from_mode'} = $diffinfo{'to_mode'} = "blob";
+		$diffinfo{'from_id'} = $hash_parent;
+		$diffinfo{'to_id'}   = $hash;
+		if (defined $file_name) {
+			if (defined $file_parent) {
+				$diffinfo{'status'} = '2';
+				$diffinfo{'from_file'} = $file_parent;
+				$diffinfo{'to_file'}   = $file_name;
+			} else { # assume not renamed
+				$diffinfo{'status'} = '1';
+				$diffinfo{'from_file'} = $file_name;
+				$diffinfo{'to_file'}   = $file_name;
+			}
+		} else { # no filename given
+			$diffinfo{'status'} = '2';
+			$diffinfo{'from_file'} = $hash_parent;
+			$diffinfo{'to_file'}   = $hash;
+		}
+
+		# non-textual hash id's can be cached
+		if ($hash =~ m/^[0-9a-fA-F]{40}$/ &&
+		    $hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
+			$expires = '+1d';
+		}
+
+		# open patch output
+		open $fd, "-|", git_cmd(), "diff", '-p', @diff_opts, $hash_parent, $hash
+			or die_error(undef, "Open git-diff failed");
+	} else  {
+		die_error('404 Not Found', "Missing one of the blob diff parameters")
+			unless %diffinfo;
+	}
+
+	# header
+	if ($format eq 'html') {
 		my $formats_nav =
 			$cgi->a({-href => href(action=>"blobdiff_plain",
-			                       hash=>$hash, hash_parent=>$hash_parent)},
+			                       hash=>$hash, hash_parent=>$hash_parent,
+			                       hash_base=>$hash_base, hash_parent_base=>$hash_parent_base,
+			                       file_name=>$file_name, file_parent=>$file_parent)},
 			        "plain");
-		git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
-		git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
+		git_header_html(undef, $expires);
+		if (defined $hash_base && (my %co = parse_commit($hash_base))) {
+			git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
+			git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
+		} else {
+			print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
+			print "<div class=\"title\">$hash vs $hash_parent</div>\n";
+		}
+		if (defined $file_name) {
+			git_print_page_path($file_name, "blob", $hash_base);
+		} else {
+			print "<div class=\"page_path\"></div>\n";
+		}
+
+	} elsif ($format eq 'plain') {
+		print $cgi->header(
+			-type => 'text/plain',
+			-charset => 'utf-8',
+			-expires => $expires,
+			-content_disposition => qq(inline; filename="${file_name}.patch"));
+
+		print "X-Git-Url: " . $cgi->self_url() . "\n\n";
+
 	} else {
-		print <<HTML;
-<div class="page_nav"><br/><br/></div>
-<div class="title">$hash vs $hash_parent</div>
-HTML
+		die_error(undef, "Unknown blobdiff format");
+	}
+
+	# patch
+	if ($format eq 'html') {
+		print "<div class=\"page_body\">\n";
+
+		git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
+		close $fd;
+
+		print "</div>\n"; # class="page_body"
+		git_footer_html();
+
+	} else {
+		while (my $line = <$fd>) {
+			$line =~ s!a/($hash|$hash_parent)!a/$diffinfo{'from_file'}!g;
+			$line =~ s!b/($hash|$hash_parent)!b/$diffinfo{'to_file'}!g;
+
+			print $line;
+
+			last if $line =~ m!^\+\+\+!;
+		}
+		local $/ = undef;
+		print <$fd>;
+		close $fd;
 	}
-	git_print_page_path($file_name, "blob", $hash_base);
-	print "<div class=\"page_body\">\n" .
-	      "<div class=\"diff_info\">blob:" .
-	      $cgi->a({-href => href(action=>"blob", hash=>$hash_parent,
-	                             hash_base=>$hash_base, file_name=>($file_parent || $file_name))},
-	              $hash_parent) .
-	      " -> blob:" .
-	      $cgi->a({-href => href(action=>"blob", hash=>$hash,
-	                             hash_base=>$hash_base, file_name=>$file_name)},
-	              $hash) .
-	      "</div>\n";
-	git_diff_print($hash_parent, $file_name || $hash_parent, $hash, $file_name || $hash);
-	print "</div>"; # page_body
-	git_footer_html();
 }
 
 sub git_blobdiff_plain {
-	mkdir($git_temp, 0700);
-	print $cgi->header(-type => "text/plain", -charset => 'utf-8');
-	git_diff_print($hash_parent, $file_name || $hash_parent, $hash, $file_name || $hash, "plain");
+	git_blobdiff('plain');
 }
 
 sub git_commitdiff {
@@ -2797,7 +3020,7 @@ sub git_commitdiff {
 	my $fd;
 	my @difftree;
 	if ($format eq 'html') {
-		open $fd, "-|", $GIT, "diff-tree", '-r', '-M', '-C',
+		open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
 			"--patch-with-raw", "--full-index", $hash_parent, $hash
 			or die_error(undef, "Open git-diff-tree failed");
 
@@ -2808,7 +3031,8 @@ sub git_commitdiff {
 		}
 
 	} elsif ($format eq 'plain') {
-		open $fd, "-|", $GIT, "diff-tree", '-r', '-p', '-B', $hash_parent, $hash
+		open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+			'-p', $hash_parent, $hash
 			or die_error(undef, "Open git-diff-tree failed");
 
 	} else {
@@ -2833,6 +3057,7 @@ sub git_commitdiff {
 		git_header_html(undef, $expires);
 		git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
 		git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
+		git_print_authorship(\%co);
 		print "<div class=\"page_body\">\n";
 		print "<div class=\"log\">\n";
 		git_print_simplified_log($co{'comment'}, 1); # skip title
@@ -2865,8 +3090,8 @@ TEXT
 
 	# write patch
 	if ($format eq 'html') {
-		#git_difftree_body(\@difftree, $hash, $hash_parent);
-		#print "<br/>\n";
+		git_difftree_body(\@difftree, $hash, $hash_parent);
+		print "<br/>\n";
 
 		git_patchset_body($fd, \@difftree, $hash, $hash_parent);
 		close $fd;
@@ -2907,7 +3132,8 @@ sub git_history {
 	git_print_page_path($file_name, $ftype, $hash_base);
 
 	open my $fd, "-|",
-		$GIT, "rev-list", "--full-history", $hash_base, "--", $file_name;
+		git_cmd(), "rev-list", "--full-history", $hash_base, "--", $file_name;
+
 	git_history_body($fd, $refs, $hash_base, $ftype);
 
 	close $fd;
@@ -2925,8 +3151,7 @@ sub git_search {
 	if (!%co) {
 		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 :)
+
 	my $commit_search = 1;
 	my $author_search = 0;
 	my $committer_search = 0;
@@ -2938,6 +3163,13 @@ sub git_search {
 	} elsif ($searchtext =~ s/^pickaxe\\://i) {
 		$commit_search = 0;
 		$pickaxe_search = 1;
+
+		# pickaxe may take all resources of your box and run for several minutes
+		# with every query - so decide by yourself how public you make this feature
+		my ($have_pickaxe) = gitweb_check_feature('pickaxe');
+		if (!$have_pickaxe) {
+			die_error('403 Permission denied', "Permission denied");
+		}
 	}
 	git_header_html();
 	git_print_page_nav('','', $hash,$co{'tree'},$hash);
@@ -2947,7 +3179,7 @@ sub git_search {
 	my $alternate = 0;
 	if ($commit_search) {
 		$/ = "\0";
-		open my $fd, "-|", $GIT, "rev-list", "--header", "--parents", $hash or next;
+		open my $fd, "-|", git_cmd(), "rev-list", "--header", "--parents", $hash or next;
 		while (my $commit_text = <$fd>) {
 			if (!grep m/$searchtext/i, $commit_text) {
 				next;
@@ -2999,7 +3231,9 @@ sub git_search {
 
 	if ($pickaxe_search) {
 		$/ = "\n";
-		open my $fd, "-|", "$GIT rev-list $hash | $GIT diff-tree -r --stdin -S\'$searchtext\'";
+		my $git_command = git_cmd_str();
+		open my $fd, "-|", "$git_command rev-list $hash | " .
+			"$git_command diff-tree -r --stdin -S\'$searchtext\'";
 		undef %co;
 		my @files;
 		while (my $line = <$fd>) {
@@ -3066,7 +3300,7 @@ sub git_shortlog {
 	my $refs = git_get_references();
 
 	my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
-	open my $fd, "-|", $GIT, "rev-list", $limit, $hash
+	open my $fd, "-|", git_cmd(), "rev-list", $limit, $hash
 		or die_error(undef, "Open git-rev-list failed");
 	my @revlist = map { chomp; $_ } <$fd>;
 	close $fd;
@@ -3094,7 +3328,7 @@ sub git_shortlog {
 
 sub git_rss {
 	# http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
-	open my $fd, "-|", $GIT, "rev-list", "--max-count=150", git_get_head_hash($project)
+	open my $fd, "-|", git_cmd(), "rev-list", "--max-count=150", git_get_head_hash($project)
 		or die_error(undef, "Open git-rev-list failed");
 	my @revlist = map { chomp; $_ } <$fd>;
 	close $fd or die_error(undef, "Reading git-rev-list failed");
@@ -3117,9 +3351,12 @@ XML
 			last;
 		}
 		my %cd = parse_date($co{'committer_epoch'});
-		open $fd, "-|", $GIT, "diff-tree", '-r', $co{'parent'}, $co{'id'} or next;
+		open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+			$co{'parent'}, $co{'id'}
+			or next;
 		my @difftree = map { chomp; $_ } <$fd>;
-		close $fd or next;
+		close $fd
+			or next;
 		print "<item>\n" .
 		      "<title>" .
 		      sprintf("%d %s %02d:%02d", $cd{'mday'}, $cd{'month'}, $cd{'hour'}, $cd{'minute'}) . " - " . esc_html($co{'title'}) .
@@ -3172,7 +3409,7 @@ XML
 		if (!defined $head) {
 			next;
 		}
-		$ENV{'GIT_DIR'} = "$projectroot/$proj{'path'}";
+		$git_dir = "$projectroot/$proj{'path'}";
 		my %co = parse_commit($head);
 		if (!%co) {
 			next;