From 4a24bfc22081a6c2771b62d464222f81c470192c Mon Sep 17 00:00:00 2001 From: Jakub Narebski Date: Tue, 9 Dec 2008 23:46:16 +0100 Subject: gitweb: Move 'lineno' id from link to row element in git_blame Move l ID from link element inside table row (inside cell element for column with line numbers), to encompassing table row element. It was done to make it easier to manipulate result HTML with DOM, and to be able write 'blame_incremental' view with the same, or nearly the same result. Signed-off-by: Jakub Narebski Acked-by: Luben Tuikov Signed-off-by: Junio C Hamano diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl index 9517392..e01e1af 100755 --- a/gitweb/gitweb.perl +++ b/gitweb/gitweb.perl @@ -4645,7 +4645,7 @@ HTML if ($group_size) { $current_color = ++$current_color % $num_colors; } - print "\n"; + print "\n"; if ($group_size) { print " $parent_commit); print ""; print $cgi->a({ -href => "$blamed#l$orig_lineno", - -id => "l$lineno", -class => "linenr" }, esc_html($lineno)); print ""; -- cgit v0.10.2-6-g49f6 From d2ce10d7b7d67ff8b50ae749ce4c5b1a2b8d133c Mon Sep 17 00:00:00 2001 From: Jakub Narebski Date: Tue, 9 Dec 2008 23:48:51 +0100 Subject: gitweb: A bit of code cleanup in git_blame() Among others, here are the highlights: * move variable declaration closer to the place it is set and used, if possible, * uniquify and simplify coding style a bit, which includes removing unnecessary '()'. * check type only if $hash was defined, as otherwise from the way git_get_hash_by_path() is called (and works), we know that it is a blob, * use modern calling convention for git-blame, * remove unused variable, * don't use implicit variables ($_), * add some comments Signed-off-by: Jakub Narebski Acked-by: Luben Tuikov Signed-off-by: Junio C Hamano diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl index e01e1af..ccbf5d4 100755 --- a/gitweb/gitweb.perl +++ b/gitweb/gitweb.perl @@ -4575,28 +4575,33 @@ sub git_tag { } sub git_blame { - my $fd; - my $ftype; - + # permissions gitweb_check_feature('blame') - or die_error(403, "Blame view not allowed"); + or die_error(403, "Blame view not allowed"); + # error checking die_error(400, "No file name given") unless $file_name; $hash_base ||= git_get_head_hash($project); - die_error(404, "Couldn't find base commit") unless ($hash_base); + die_error(404, "Couldn't find base commit") unless $hash_base; my %co = parse_commit($hash_base) or die_error(404, "Commit not found"); + my $ftype = "blob"; if (!defined $hash) { $hash = git_get_hash_by_path($hash_base, $file_name, "blob") or die_error(404, "Error looking up file"); + } else { + $ftype = git_get_type($hash); + if ($ftype !~ "blob") { + die_error(400, "Object is not a blob"); + } } - $ftype = git_get_type($hash); - if ($ftype !~ "blob") { - die_error(400, "Object is not a blob"); - } - open ($fd, "-|", git_cmd(), "blame", '-p', '--', - $file_name, $hash_base) + + # run git-blame --porcelain + open my $fd, "-|", git_cmd(), "blame", '-p', + $hash_base, '--', $file_name or die_error(500, "Open git-blame failed"); + + # page header git_header_html(); my $formats_nav = $cgi->a({-href => href(action=>"blob", -replay=>1)}, @@ -4610,40 +4615,44 @@ sub git_blame { git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav); git_print_header_div('commit', esc_html($co{'title'}), $hash_base); git_print_page_path($file_name, $ftype, $hash_base); - my @rev_color = (qw(light2 dark2)); + + # page body + my @rev_color = qw(light2 dark2); my $num_colors = scalar(@rev_color); my $current_color = 0; - my $last_rev; + my %metainfo = (); + print < HTML - my %metainfo = (); - while (1) { - $_ = <$fd>; - last unless defined $_; + LINE: + while (my $line = <$fd>) { + chomp $line; + # the header: [] + # no for subsequent lines in group of lines my ($full_rev, $orig_lineno, $lineno, $group_size) = - /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/; + ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/); if (!exists $metainfo{$full_rev}) { $metainfo{$full_rev} = {}; } my $meta = $metainfo{$full_rev}; - while (<$fd>) { - last if (s/^\t//); - if (/^(\S+) (.*)$/) { + my $data; + while ($data = <$fd>) { + chomp $data; + last if ($data =~ s/^\t//); # contents of line + if ($data =~ /^(\S+) (.*)$/) { $meta->{$1} = $2; } } - my $data = $_; - chomp $data; - my $rev = substr($full_rev, 0, 8); + my $short_rev = substr($full_rev, 0, 8); my $author = $meta->{'author'}; - my %date = parse_date($meta->{'author-time'}, - $meta->{'author-tz'}); + my %date = + parse_date($meta->{'author-time'}, $meta->{'author-tz'}); my $date = $date{'iso-tz'}; if ($group_size) { - $current_color = ++$current_color % $num_colors; + $current_color = ($current_color + 1) % $num_colors; } print "\n"; if ($group_size) { @@ -4654,7 +4663,7 @@ HTML print $cgi->a({-href => href(action=>"commit", hash=>$full_rev, file_name=>$file_name)}, - esc_html($rev)); + esc_html($short_rev)); print "\n"; } open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^") @@ -4677,6 +4686,8 @@ HTML print ""; close $fd or print "Reading blob failed\n"; + + # page footer git_footer_html(); } -- cgit v0.10.2-6-g49f6 From 39c19ce2755830dd1dfdabf36e2b0166df3546f8 Mon Sep 17 00:00:00 2001 From: Jakub Narebski Date: Thu, 11 Dec 2008 01:33:29 +0100 Subject: gitweb: cache $parent_commit info in git_blame() Luben Tuikov changed 'lineno' link from leading to commit which gave current version of given block of lines, to leading to parent of this commit in 244a70e (Blame "linenr" link jumps to previous state at "orig_lineno"). This made possible data mining using 'blame' view. The current implementation calls rev-parse once per each blamed line to find parent revision of blamed commit, even when the same commit appears more than once, which is inefficient. This patch mitigates this issue by caching $parent_commit info in %metainfo, which makes gitweb call rev-parse only once per each unique commit in the output from "git blame". In the tables below you can see simple benchmark comparing gitweb performance before and after this patch File | L[1] | C[2] || Time0[3] | Before[4] | After[4] ==================================================================== blob.h | 18 | 4 || 0m1.727s | 0m2.545s | 0m2.474s GIT-VERSION-GEN | 42 | 13 || 0m2.165s | 0m2.448s | 0m2.071s README | 46 | 6 || 0m1.593s | 0m2.727s | 0m2.242s revision.c | 1923 | 121 || 0m2.357s | 0m30.365s | 0m7.028s gitweb/gitweb.perl | 6291 | 428 || 0m8.080s | 1m37.244s | 0m20.627s File | L/C | Before/After ========================================= blob.h | 4.5 | 1.03 GIT-VERSION-GEN | 3.2 | 1.18 README | 7.7 | 1.22 revision.c | 15.9 | 4.32 gitweb/gitweb.perl | 14.7 | 4.71 As you can see the greater ratio of lines in file to unique commits in blame output, the greater gain from the new implementation. Legend: [1] Number of lines: $ wc -l [2] Number of unique commits in the blame output: $ git blame -p | grep author-time | wc -l [3] Time for running "git blame -p" (user time, single run): $ time git blame -p >/dev/null [4] Time to run gitweb as Perl script from command line: $ gitweb-run.sh "p=.git;a=blame;f=" > /dev/null 2>&1 The gitweb-run.sh script includes slightly modified (with adjusted pathnames) code from gitweb_run() function from the test script t/t9500-gitweb-standalone-no-errors.sh; gitweb config file gitweb_config.perl contents (again up to adjusting pathnames; in particular $projectroot variable should point to top directory of git repository) can be found in the same place. Discussion ~~~~~~~~~~ A possible future improvement would be to open a bidi pipe to "git cat-file --batch-check", (like in Git::Repo in gitweb caching by Lea Wiemann), feed $long_rev^ to it, and parse its output, which is in the following form: 926b07e694599d86cec668475071b32147c95034 commit 637 This would mean one call to git-cat-file for the whole 'blame' view, instead of one call to git-rev-parse per each unique commit in blame output. Yet another solution would be to change use of validate_refname() to validate_revision() when checking script parameters (CGI query or path_info), with validate_revision being something like the following: sub validate_revision { my $rev = shift; return validate_refname(strip_rev_suffixes($rev)); } so we don't need to calculate $long_rev^, but can pass "$long_rev^" as 'hb' parameter. This solution has the advantage that it can be easily adapted to future incremental blame output. Signed-off-by: Jakub Narebski Acked-by: Luben Tuikov Signed-off-by: Junio C Hamano diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl index ccbf5d4..f992de2 100755 --- a/gitweb/gitweb.perl +++ b/gitweb/gitweb.perl @@ -4666,11 +4666,17 @@ HTML esc_html($short_rev)); print "\n"; } - open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^") - or die_error(500, "Open git-rev-parse failed"); - my $parent_commit = <$dd>; - close $dd; - chomp($parent_commit); + my $parent_commit; + if (!exists $meta->{'parent'}) { + open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^") + or die_error(500, "Open git-rev-parse failed"); + $parent_commit = <$dd>; + close $dd; + chomp($parent_commit); + $meta->{'parent'} = $parent_commit; + } else { + $parent_commit = $meta->{'parent'}; + } my $blamed = href(action => 'blame', file_name => $meta->{'filename'}, hash_base => $parent_commit); -- cgit v0.10.2-6-g49f6
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