mirror of
https://github.com/git/git
synced 2024-10-30 04:01:21 +00:00
512 lines
11 KiB
Perl
Executable file
512 lines
11 KiB
Perl
Executable file
#!/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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use File::Basename qw(basename dirname);
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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 or !@ARGV) {
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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 ? $head : '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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if (!defined $filename) {
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next;
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}
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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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die "Failed to find a blob for $filename in rev $rev\n" if !defined $blob;
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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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chomp;
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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 $blob if ($tfilename 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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my $minutes = abs($timezone);
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$minutes = int($minutes / 100) * 60 + ($minutes % 100);
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if ($timezone < 0) {
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$minutes = -$minutes;
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}
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my $t = $timestamp + $minutes * 60;
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return strftime("%Y-%m-%d %H:%M:%S " . $timezone, gmtime($t));
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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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