diff options
| -rw-r--r-- | Makefile | 1 | ||||
| -rwxr-xr-x | git-annotate.perl | 321 |
2 files changed, 322 insertions, 0 deletions
@@ -119,6 +119,7 @@ SCRIPT_SH = \ SCRIPT_PERL = \ git-archimport.perl git-cvsimport.perl git-relink.perl \ git-shortlog.perl git-fmt-merge-msg.perl git-rerere.perl \ + git-annotate.perl \ git-svnimport.perl git-mv.perl git-cvsexportcommit.perl SCRIPT_PYTHON = \ diff --git a/git-annotate.perl b/git-annotate.perl new file mode 100755 index 000000000..8f984318a --- /dev/null +++ b/git-annotate.perl @@ -0,0 +1,321 @@ +#!/usr/bin/perl +# Copyright 2006, Ryan Anderson <ryan@michonline.com> +# +# GPL v2 (See COPYING) +# +# This file is licensed under the GPL v2, or a later version +# at the discretion of Linus Torvalds. + +use warnings; +use strict; + +my $filename = shift @ARGV; + + +my @stack = ( + { + 'rev' => "HEAD", + 'filename' => $filename, + }, +); + +our (@lineoffsets, @pendinglineoffsets); +our @filelines = (); +open(F,"<",$filename) + or die "Failed to open filename: $!"; + +while(<F>) { + chomp; + push @filelines, $_; +} +close(F); +our $leftover_lines = @filelines; +our %revs; +our @revqueue; +our $head; + +my $revsprocessed = 0; +while (my $bound = pop @stack) { + my @revisions = git_rev_list($bound->{'rev'}, $bound->{'filename'}); + foreach my $revinst (@revisions) { + my ($rev, @parents) = @$revinst; + $head ||= $rev; + + $revs{$rev}{'filename'} = $bound->{'filename'}; + if (scalar @parents > 0) { + $revs{$rev}{'parents'} = \@parents; + next; + } + + my $newbound = find_parent_renames($rev, $bound->{'filename'}); + if ( exists $newbound->{'filename'} && $newbound->{'filename'} ne $bound->{'filename'}) { + push @stack, $newbound; + $revs{$rev}{'parents'} = [$newbound->{'rev'}]; + } + } +} +push @revqueue, $head; +init_claim($head); +$revs{$head}{'lineoffsets'} = {}; +handle_rev(); + + +my $i = 0; +foreach my $l (@filelines) { + my ($output, $rev, $committer, $date); + if (ref $l eq 'ARRAY') { + ($output, $rev, $committer, $date) = @$l; + if (length($rev) > 8) { + $rev = substr($rev,0,8); + } + } else { + $output = $l; + ($rev, $committer, $date) = ('unknown', 'unknown', 'unknown'); + } + + printf("(%8s %10s %10s %d)%s\n", $rev, $committer, $date, $i++, $output); +} + +sub init_claim { + my ($rev) = @_; + my %revinfo = git_commit_info($rev); + for (my $i = 0; $i < @filelines; $i++) { + $filelines[$i] = [ $filelines[$i], '', '', '', 1]; + # line, + # rev, + # author, + # date, + # 1 <-- belongs to the original file. + } + $revs{$rev}{'lines'} = \@filelines; +} + + +sub handle_rev { + my $i = 0; + while (my $rev = shift @revqueue) { + + my %revinfo = git_commit_info($rev); + + foreach my $p (@{$revs{$rev}{'parents'}}) { + + git_diff_parse($p, $rev, %revinfo); + push @revqueue, $p; + } + + + if (scalar @{$revs{$rev}{parents}} == 0) { + # We must be at the initial rev here, so claim everything that is left. + for (my $i = 0; $i < @{$revs{$rev}{lines}}; $i++) { + if (ref ${$revs{$rev}{lines}}[$i] eq '' || ${$revs{$rev}{lines}}[$i][1] eq '') { + claim_line($i, $rev, $revs{$rev}{lines}, %revinfo); + } + } + } + } +} + + +sub git_rev_list { + my ($rev, $file) = @_; + + open(P,"-|","git-rev-list","--parents","--remove-empty",$rev,"--",$file) + or die "Failed to exec git-rev-list: $!"; + + my @revs; + while(my $line = <P>) { + chomp $line; + my ($rev, @parents) = split /\s+/, $line; + push @revs, [ $rev, @parents ]; + } + close(P); + + printf("0 revs found for rev %s (%s)\n", $rev, $file) if (@revs == 0); + return @revs; +} + +sub find_parent_renames { + my ($rev, $file) = @_; + + open(P,"-|","git-diff-tree", "-M50", "-r","--name-status", "-z","$rev") + or die "Failed to exec git-diff: $!"; + + local $/ = "\0"; + my %bound; + my $junk = <P>; + while (my $change = <P>) { + chomp $change; + my $filename = <P>; + chomp $filename; + + if ($change =~ m/^[AMD]$/ ) { + next; + } elsif ($change =~ m/^R/ ) { + my $oldfilename = $filename; + $filename = <P>; + chomp $filename; + if ( $file eq $filename ) { + my $parent = git_find_parent($rev, $oldfilename); + @bound{'rev','filename'} = ($parent, $oldfilename); + last; + } + } + } + close(P); + + return \%bound; +} + + +sub git_find_parent { + my ($rev, $filename) = @_; + + open(REVPARENT,"-|","git-rev-list","--remove-empty", "--parents","--max-count=1","$rev","--",$filename) + or die "Failed to open git-rev-list to find a single parent: $!"; + + my $parentline = <REVPARENT>; + chomp $parentline; + my ($revfound,$parent) = split m/\s+/, $parentline; + + close(REVPARENT); + + return $parent; +} + + +# Get a diff between the current revision and a parent. +# Record the commit information that results. +sub git_diff_parse { + my ($parent, $rev, %revinfo) = @_; + + my ($ri, $pi) = (0,0); + open(DIFF,"-|","git-diff-tree","-M","-p",$rev,$parent,"--", + $revs{$rev}{'filename'}, $revs{$parent}{'filename'}) + or die "Failed to call git-diff for annotation: $!"; + + my $slines = $revs{$rev}{'lines'}; + my @plines; + + my $gotheader = 0; + my ($remstart, $remlength, $addstart, $addlength); + my ($hunk_start, $hunk_index, $hunk_adds); + while(<DIFF>) { + chomp; + if (m/^@@ -(\d+),(\d+) \+(\d+),(\d+)/) { + ($remstart, $remlength, $addstart, $addlength) = ($1, $2, $3, $4); + # Adjust for 0-based arrays + $remstart--; + $addstart--; + # Reinit hunk tracking. + $hunk_start = $remstart; + $hunk_index = 0; + $gotheader = 1; + + for (my $i = $ri; $i < $remstart; $i++) { + $plines[$pi++] = $slines->[$i]; + $ri++; + } + next; + } elsif (!$gotheader) { + next; + } + + if (m/^\+(.*)$/) { + my $line = $1; + $plines[$pi++] = [ $line, '', '', '', 0 ]; + next; + + } elsif (m/^-(.*)$/) { + my $line = $1; + if (get_line($slines, $ri) eq $line) { + # Found a match, claim + claim_line($ri, $rev, $slines, %revinfo); + } else { + die sprintf("Sync error: %d/%d\n|%s\n|%s\n%s => %s\n", + $ri, $hunk_start + $hunk_index, + $line, + get_line($slines, $ri), + $rev, $parent); + } + $ri++; + + } else { + if (substr($_,1) ne get_line($slines,$ri) ) { + die sprintf("Line %d (%d) does not match:\n|%s\n|%s\n%s => %s\n", + $hunk_start + $hunk_index, $ri, + substr($_,1), + get_line($slines,$ri), + $rev, $parent); + } + $plines[$pi++] = $slines->[$ri++]; + } + $hunk_index++; + } + close(DIFF); + for (my $i = $ri; $i < @{$slines} ; $i++) { + push @plines, $slines->[$ri++]; + } + + $revs{$parent}{lines} = \@plines; + return; +} + +sub get_line { + my ($lines, $index) = @_; + + return ref $lines->[$index] ne '' ? $lines->[$index][0] : $lines->[$index]; +} + +sub git_cat_file { + my ($parent, $filename) = @_; + return () unless defined $parent && defined $filename; + my $blobline = `git-ls-tree $parent $filename`; + my ($mode, $type, $blob, $tfilename) = split(/\s+/, $blobline, 4); + + open(C,"-|","git-cat-file", "blob", $blob) + or die "Failed to git-cat-file blob $blob (rev $parent, file $filename): " . $!; + + my @lines; + while(<C>) { + chomp; + push @lines, $_; + } + close(C); + + return @lines; +} + + +sub claim_line { + my ($floffset, $rev, $lines, %revinfo) = @_; + my $oline = get_line($lines, $floffset); + @{$lines->[$floffset]} = ( $oline, $rev, + $revinfo{'author'}, $revinfo{'author_date'} ); + #printf("Claiming line %d with rev %s: '%s'\n", + # $floffset, $rev, $oline) if 1; +} + +sub git_commit_info { + my ($rev) = @_; + open(COMMIT, "-|","git-cat-file", "commit", $rev) + or die "Failed to call git-cat-file: $!"; + + my %info; + while(<COMMIT>) { + chomp; + last if (length $_ == 0); + + if (m/^author (.*) <(.*)> (.*)$/) { + $info{'author'} = $1; + $info{'author_email'} = $2; + $info{'author_date'} = $3; + } elsif (m/^committer (.*) <(.*)> (.*)$/) { + $info{'committer'} = $1; + $info{'committer_email'} = $2; + $info{'committer_date'} = $3; + } + } + close(COMMIT); + + return %info; +} |