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500 lines
10 KiB
500 lines
10 KiB
#!/usr/bin/perl |
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# Copyright 2006, Ryan Anderson <ryan@michonline.com> |
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# |
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# GPL v2 (See COPYING) |
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# |
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# This file is licensed under the GPL v2, or a later version |
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# at the discretion of Linus Torvalds. |
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use warnings; |
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use strict; |
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use Getopt::Long; |
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use POSIX qw(strftime gmtime); |
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sub usage() { |
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print STDERR 'Usage: ${\basename $0} [-s] [-S revs-file] file [ revision ] |
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-l, --long |
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Show long rev (Defaults off) |
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-t, --time |
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Show raw timestamp (Defaults off) |
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-r, --rename |
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Follow renames (Defaults on). |
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-S, --rev-file revs-file |
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use revs from revs-file instead of calling git-rev-list |
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-h, --help |
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This message. |
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'; |
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exit(1); |
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} |
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our ($help, $longrev, $rename, $rawtime, $starting_rev, $rev_file) = (0, 0, 1); |
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my $rc = GetOptions( "long|l" => \$longrev, |
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"time|t" => \$rawtime, |
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"help|h" => \$help, |
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"rename|r" => \$rename, |
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"rev-file|S=s" => \$rev_file); |
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if (!$rc or $help) { |
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usage(); |
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} |
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my $filename = shift @ARGV; |
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if (@ARGV) { |
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$starting_rev = shift @ARGV; |
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} |
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my @stack = ( |
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{ |
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'rev' => defined $starting_rev ? $starting_rev : "HEAD", |
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'filename' => $filename, |
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}, |
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); |
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our @filelines = (); |
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if (defined $starting_rev) { |
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@filelines = git_cat_file($starting_rev, $filename); |
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} else { |
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open(F,"<",$filename) |
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or die "Failed to open filename: $!"; |
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while(<F>) { |
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chomp; |
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push @filelines, $_; |
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} |
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close(F); |
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} |
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our %revs; |
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our @revqueue; |
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our $head; |
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my $revsprocessed = 0; |
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while (my $bound = pop @stack) { |
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my @revisions = git_rev_list($bound->{'rev'}, $bound->{'filename'}); |
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foreach my $revinst (@revisions) { |
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my ($rev, @parents) = @$revinst; |
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$head ||= $rev; |
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if (!defined($rev)) { |
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$rev = ""; |
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} |
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$revs{$rev}{'filename'} = $bound->{'filename'}; |
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if (scalar @parents > 0) { |
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$revs{$rev}{'parents'} = \@parents; |
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next; |
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} |
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if (!$rename) { |
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next; |
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} |
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my $newbound = find_parent_renames($rev, $bound->{'filename'}); |
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if ( exists $newbound->{'filename'} && $newbound->{'filename'} ne $bound->{'filename'}) { |
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push @stack, $newbound; |
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$revs{$rev}{'parents'} = [$newbound->{'rev'}]; |
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} |
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} |
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} |
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push @revqueue, $head; |
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init_claim( defined $starting_rev ? $starting_rev : 'dirty'); |
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unless (defined $starting_rev) { |
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my $diff = open_pipe("git","diff","-R", "HEAD", "--",$filename) |
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or die "Failed to call git diff to check for dirty state: $!"; |
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_git_diff_parse($diff, $head, "dirty", ( |
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'author' => gitvar_name("GIT_AUTHOR_IDENT"), |
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'author_date' => sprintf("%s +0000",time()), |
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) |
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); |
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close($diff); |
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} |
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handle_rev(); |
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my $i = 0; |
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foreach my $l (@filelines) { |
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my ($output, $rev, $committer, $date); |
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if (ref $l eq 'ARRAY') { |
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($output, $rev, $committer, $date) = @$l; |
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if (!$longrev && length($rev) > 8) { |
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$rev = substr($rev,0,8); |
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} |
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} else { |
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$output = $l; |
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($rev, $committer, $date) = ('unknown', 'unknown', 'unknown'); |
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} |
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printf("%s\t(%10s\t%10s\t%d)%s\n", $rev, $committer, |
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format_date($date), ++$i, $output); |
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} |
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sub init_claim { |
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my ($rev) = @_; |
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for (my $i = 0; $i < @filelines; $i++) { |
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$filelines[$i] = [ $filelines[$i], '', '', '', 1]; |
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# line, |
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# rev, |
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# author, |
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# date, |
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# 1 <-- belongs to the original file. |
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} |
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$revs{$rev}{'lines'} = \@filelines; |
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} |
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sub handle_rev { |
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my $i = 0; |
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my %seen; |
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while (my $rev = shift @revqueue) { |
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next if $seen{$rev}++; |
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my %revinfo = git_commit_info($rev); |
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foreach my $p (@{$revs{$rev}{'parents'}}) { |
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git_diff_parse($p, $rev, %revinfo); |
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push @revqueue, $p; |
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} |
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if (scalar @{$revs{$rev}{parents}} == 0) { |
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# We must be at the initial rev here, so claim everything that is left. |
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for (my $i = 0; $i < @{$revs{$rev}{lines}}; $i++) { |
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if (ref ${$revs{$rev}{lines}}[$i] eq '' || ${$revs{$rev}{lines}}[$i][1] eq '') { |
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claim_line($i, $rev, $revs{$rev}{lines}, %revinfo); |
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} |
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} |
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} |
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} |
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} |
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sub git_rev_list { |
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my ($rev, $file) = @_; |
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my $revlist; |
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if ($rev_file) { |
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open($revlist, '<' . $rev_file) |
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or die "Failed to open $rev_file : $!"; |
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} else { |
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$revlist = open_pipe("git-rev-list","--parents","--remove-empty",$rev,"--",$file) |
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or die "Failed to exec git-rev-list: $!"; |
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} |
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my @revs; |
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while(my $line = <$revlist>) { |
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chomp $line; |
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my ($rev, @parents) = split /\s+/, $line; |
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push @revs, [ $rev, @parents ]; |
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} |
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close($revlist); |
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printf("0 revs found for rev %s (%s)\n", $rev, $file) if (@revs == 0); |
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return @revs; |
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} |
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sub find_parent_renames { |
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my ($rev, $file) = @_; |
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my $patch = open_pipe("git-diff-tree", "-M50", "-r","--name-status", "-z","$rev") |
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or die "Failed to exec git-diff: $!"; |
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local $/ = "\0"; |
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my %bound; |
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my $junk = <$patch>; |
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while (my $change = <$patch>) { |
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chomp $change; |
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my $filename = <$patch>; |
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chomp $filename; |
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if ($change =~ m/^[AMD]$/ ) { |
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next; |
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} elsif ($change =~ m/^R/ ) { |
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my $oldfilename = $filename; |
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$filename = <$patch>; |
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chomp $filename; |
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if ( $file eq $filename ) { |
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my $parent = git_find_parent($rev, $oldfilename); |
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@bound{'rev','filename'} = ($parent, $oldfilename); |
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last; |
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} |
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} |
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} |
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close($patch); |
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return \%bound; |
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} |
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sub git_find_parent { |
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my ($rev, $filename) = @_; |
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my $revparent = open_pipe("git-rev-list","--remove-empty", "--parents","--max-count=1","$rev","--",$filename) |
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or die "Failed to open git-rev-list to find a single parent: $!"; |
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my $parentline = <$revparent>; |
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chomp $parentline; |
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my ($revfound,$parent) = split m/\s+/, $parentline; |
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close($revparent); |
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return $parent; |
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} |
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# Get a diff between the current revision and a parent. |
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# Record the commit information that results. |
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sub git_diff_parse { |
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my ($parent, $rev, %revinfo) = @_; |
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my $diff = open_pipe("git-diff-tree","-M","-p",$rev,$parent,"--", |
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$revs{$rev}{'filename'}, $revs{$parent}{'filename'}) |
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or die "Failed to call git-diff for annotation: $!"; |
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_git_diff_parse($diff, $parent, $rev, %revinfo); |
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close($diff); |
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} |
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sub _git_diff_parse { |
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my ($diff, $parent, $rev, %revinfo) = @_; |
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my ($ri, $pi) = (0,0); |
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my $slines = $revs{$rev}{'lines'}; |
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my @plines; |
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my $gotheader = 0; |
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my ($remstart); |
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my ($hunk_start, $hunk_index); |
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while(<$diff>) { |
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chomp; |
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if (m/^@@ -(\d+),(\d+) \+(\d+),(\d+)/) { |
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$remstart = $1; |
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# Adjust for 0-based arrays |
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$remstart--; |
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# Reinit hunk tracking. |
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$hunk_start = $remstart; |
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$hunk_index = 0; |
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$gotheader = 1; |
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for (my $i = $ri; $i < $remstart; $i++) { |
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$plines[$pi++] = $slines->[$i]; |
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$ri++; |
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} |
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next; |
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} elsif (!$gotheader) { |
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next; |
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} |
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if (m/^\+(.*)$/) { |
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my $line = $1; |
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$plines[$pi++] = [ $line, '', '', '', 0 ]; |
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next; |
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} elsif (m/^-(.*)$/) { |
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my $line = $1; |
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if (get_line($slines, $ri) eq $line) { |
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# Found a match, claim |
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claim_line($ri, $rev, $slines, %revinfo); |
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} else { |
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die sprintf("Sync error: %d/%d\n|%s\n|%s\n%s => %s\n", |
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$ri, $hunk_start + $hunk_index, |
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$line, |
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get_line($slines, $ri), |
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$rev, $parent); |
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} |
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$ri++; |
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} elsif (m/^\\/) { |
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; |
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# Skip \No newline at end of file. |
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# But this can be internationalized, so only look |
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# for an initial \ |
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} else { |
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if (substr($_,1) ne get_line($slines,$ri) ) { |
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die sprintf("Line %d (%d) does not match:\n|%s\n|%s\n%s => %s\n", |
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$hunk_start + $hunk_index, $ri, |
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substr($_,1), |
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get_line($slines,$ri), |
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$rev, $parent); |
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} |
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$plines[$pi++] = $slines->[$ri++]; |
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} |
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$hunk_index++; |
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} |
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for (my $i = $ri; $i < @{$slines} ; $i++) { |
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push @plines, $slines->[$ri++]; |
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} |
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$revs{$parent}{lines} = \@plines; |
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return; |
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} |
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sub get_line { |
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my ($lines, $index) = @_; |
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return ref $lines->[$index] ne '' ? $lines->[$index][0] : $lines->[$index]; |
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} |
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sub git_cat_file { |
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my ($rev, $filename) = @_; |
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return () unless defined $rev && defined $filename; |
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my $blob = git_ls_tree($rev, $filename); |
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my $catfile = open_pipe("git","cat-file", "blob", $blob) |
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or die "Failed to git-cat-file blob $blob (rev $rev, file $filename): " . $!; |
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my @lines; |
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while(<$catfile>) { |
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chomp; |
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push @lines, $_; |
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} |
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close($catfile); |
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return @lines; |
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} |
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sub git_ls_tree { |
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my ($rev, $filename) = @_; |
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my $lstree = open_pipe("git","ls-tree",$rev,$filename) |
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or die "Failed to call git ls-tree: $!"; |
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my ($mode, $type, $blob, $tfilename); |
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while(<$lstree>) { |
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($mode, $type, $blob, $tfilename) = split(/\s+/, $_, 4); |
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last if ($tfilename eq $filename); |
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} |
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close($lstree); |
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return $blob if $filename eq $filename; |
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die "git-ls-tree failed to find blob for $filename"; |
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} |
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sub claim_line { |
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my ($floffset, $rev, $lines, %revinfo) = @_; |
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my $oline = get_line($lines, $floffset); |
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@{$lines->[$floffset]} = ( $oline, $rev, |
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$revinfo{'author'}, $revinfo{'author_date'} ); |
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#printf("Claiming line %d with rev %s: '%s'\n", |
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# $floffset, $rev, $oline) if 1; |
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} |
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sub git_commit_info { |
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my ($rev) = @_; |
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my $commit = open_pipe("git-cat-file", "commit", $rev) |
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or die "Failed to call git-cat-file: $!"; |
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my %info; |
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while(<$commit>) { |
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chomp; |
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last if (length $_ == 0); |
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if (m/^author (.*) <(.*)> (.*)$/) { |
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$info{'author'} = $1; |
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$info{'author_email'} = $2; |
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$info{'author_date'} = $3; |
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} elsif (m/^committer (.*) <(.*)> (.*)$/) { |
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$info{'committer'} = $1; |
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$info{'committer_email'} = $2; |
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$info{'committer_date'} = $3; |
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} |
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} |
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close($commit); |
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return %info; |
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} |
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sub format_date { |
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if ($rawtime) { |
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return $_[0]; |
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} |
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my ($timestamp, $timezone) = split(' ', $_[0]); |
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return strftime("%Y-%m-%d %H:%M:%S " . $timezone, gmtime($timestamp)); |
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} |
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# Copied from git-send-email.perl - We need a Git.pm module.. |
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sub gitvar { |
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my ($var) = @_; |
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my $fh; |
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my $pid = open($fh, '-|'); |
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die "$!" unless defined $pid; |
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if (!$pid) { |
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exec('git-var', $var) or die "$!"; |
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} |
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my ($val) = <$fh>; |
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close $fh or die "$!"; |
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chomp($val); |
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return $val; |
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} |
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sub gitvar_name { |
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my ($name) = @_; |
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my $val = gitvar($name); |
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my @field = split(/\s+/, $val); |
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return join(' ', @field[0...(@field-4)]); |
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} |
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sub open_pipe { |
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if ($^O eq '##INSERT_ACTIVESTATE_STRING_HERE##') { |
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return open_pipe_activestate(@_); |
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} else { |
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return open_pipe_normal(@_); |
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} |
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} |
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sub open_pipe_activestate { |
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tie *fh, "Git::ActiveStatePipe", @_; |
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return *fh; |
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} |
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sub open_pipe_normal { |
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my (@execlist) = @_; |
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my $pid = open my $kid, "-|"; |
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defined $pid or die "Cannot fork: $!"; |
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unless ($pid) { |
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exec @execlist; |
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die "Cannot exec @execlist: $!"; |
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} |
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return $kid; |
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} |
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package Git::ActiveStatePipe; |
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use strict; |
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sub TIEHANDLE { |
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my ($class, @params) = @_; |
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my $cmdline = join " ", @params; |
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my @data = qx{$cmdline}; |
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bless { i => 0, data => \@data }, $class; |
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} |
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sub READLINE { |
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my $self = shift; |
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if ($self->{i} >= scalar @{$self->{data}}) { |
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return undef; |
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} |
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return $self->{'data'}->[ $self->{i}++ ]; |
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} |
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sub CLOSE { |
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my $self = shift; |
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delete $self->{data}; |
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delete $self->{i}; |
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} |
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sub EOF { |
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my $self = shift; |
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return ($self->{i} >= scalar @{$self->{data}}); |
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}
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