use strict;
use Getopt::Long;
use POSIX qw(strftime gmtime);
+use File::Basename qw(basename dirname);
sub usage() {
- print STDERR 'Usage: ${\basename $0} [-s] [-S revs-file] file [ revision ]
+ print STDERR "Usage: ${\basename $0} [-s] [-S revs-file] file [ revision ]
-l, --long
Show long rev (Defaults off)
-t, --time
-r, --rename
Follow renames (Defaults on).
-S, --rev-file revs-file
- use revs from revs-file instead of calling git-rev-list
+ Use revs from revs-file instead of calling git-rev-list
-h, --help
This message.
-';
+";
exit(1);
}
"help|h" => \$help,
"rename|r" => \$rename,
"rev-file|S=s" => \$rev_file);
-if (!$rc or $help) {
+if (!$rc or $help or !@ARGV) {
usage();
}
}
}
push @revqueue, $head;
-init_claim( defined $starting_rev ? $starting_rev : 'dirty');
+init_claim( defined $starting_rev ? $head : 'dirty');
unless (defined $starting_rev) {
- my $diff = open_pipe("git","diff","-R", "HEAD", "--",$filename)
+ my $diff = open_pipe("git","diff","HEAD", "--",$filename)
or die "Failed to call git diff to check for dirty state: $!";
- _git_diff_parse($diff, $head, "dirty", (
+ _git_diff_parse($diff, [$head], "dirty", (
'author' => gitvar_name("GIT_AUTHOR_IDENT"),
'author_date' => sprintf("%s +0000",time()),
)
sub handle_rev {
- my $i = 0;
+ my $revseen = 0;
my %seen;
while (my $rev = shift @revqueue) {
next if $seen{$rev}++;
my %revinfo = git_commit_info($rev);
- foreach my $p (@{$revs{$rev}{'parents'}}) {
-
- git_diff_parse($p, $rev, %revinfo);
- push @revqueue, $p;
- }
+ if (exists $revs{$rev}{parents} &&
+ scalar @{$revs{$rev}{parents}} != 0) {
+ git_diff_parse($revs{$rev}{'parents'}, $rev, %revinfo);
+ push @revqueue, @{$revs{$rev}{'parents'}};
- if (scalar @{$revs{$rev}{parents}} == 0) {
+ } else {
# 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 '') {
while (my $change = <$patch>) {
chomp $change;
my $filename = <$patch>;
+ if (!defined $filename) {
+ next;
+ }
chomp $filename;
if ($change =~ m/^[AMD]$/ ) {
return $parent;
}
+sub git_find_all_parents {
+ my ($rev) = @_;
+
+ my $revparent = open_pipe("git-rev-list","--remove-empty", "--parents","--max-count=1","$rev")
+ or die "Failed to open git-rev-list to find a single parent: $!";
+
+ my $parentline = <$revparent>;
+ chomp $parentline;
+ my ($origrev, @parents) = split m/\s+/, $parentline;
+
+ close($revparent);
+
+ return @parents;
+}
+
+sub git_merge_base {
+ my ($rev1, $rev2) = @_;
+
+ my $mb = open_pipe("git-merge-base", $rev1, $rev2)
+ or die "Failed to open git-merge-base: $!";
+
+ my $base = <$mb>;
+ chomp $base;
+
+ close($mb);
+
+ return $base;
+}
+
+# Construct a set of pseudo parents that are in the same order,
+# and the same quantity as the real parents,
+# but whose SHA1s are as similar to the logical parents
+# as possible.
+sub get_pseudo_parents {
+ my ($all, $fake) = @_;
+
+ my @all = @$all;
+ my @fake = @$fake;
+
+ my @pseudo;
+
+ my %fake = map {$_ => 1} @fake;
+ my %seenfake;
+
+ my $fakeidx = 0;
+ foreach my $p (@all) {
+ if (exists $fake{$p}) {
+ if ($fake[$fakeidx] ne $p) {
+ die sprintf("parent mismatch: %s != %s\nall:%s\nfake:%s\n",
+ $fake[$fakeidx], $p,
+ join(", ", @all),
+ join(", ", @fake),
+ );
+ }
+
+ push @pseudo, $p;
+ $fakeidx++;
+ $seenfake{$p}++;
+
+ } else {
+ my $base = git_merge_base($fake[$fakeidx], $p);
+ if ($base ne $fake[$fakeidx]) {
+ die sprintf("Result of merge-base doesn't match fake: %s,%s != %s\n",
+ $fake[$fakeidx], $p, $base);
+ }
+
+ # The details of how we parse the diffs
+ # mean that we cannot have a duplicate
+ # revision in the list, so if we've already
+ # seen the revision we would normally add, just use
+ # the actual revision.
+ if ($seenfake{$base}) {
+ push @pseudo, $p;
+ } else {
+ push @pseudo, $base;
+ $seenfake{$base}++;
+ }
+ }
+ }
+
+ return @pseudo;
+}
+
# Get a diff between the current revision and a parent.
# Record the commit information that results.
sub git_diff_parse {
- my ($parent, $rev, %revinfo) = @_;
+ my ($parents, $rev, %revinfo) = @_;
+
+ my @pseudo_parents;
+ my @command = ("git-diff-tree");
+ my $revision_spec;
+
+ if (scalar @$parents == 1) {
+
+ $revision_spec = join("..", $parents->[0], $rev);
+ @pseudo_parents = @$parents;
+ } else {
+ my @all_parents = git_find_all_parents($rev);
+
+ if (@all_parents != @$parents) {
+ @pseudo_parents = get_pseudo_parents(\@all_parents, $parents);
+ } else {
+ @pseudo_parents = @$parents;
+ }
+
+ $revision_spec = $rev;
+ push @command, "-c";
+ }
+
+ my @filenames = ( $revs{$rev}{'filename'} );
+
+ foreach my $parent (@$parents) {
+ push @filenames, $revs{$parent}{'filename'};
+ }
+
+ push @command, "-p", "-M", $revision_spec, "--", @filenames;
- my $diff = open_pipe("git-diff-tree","-M","-p",$rev,$parent,"--",
- $revs{$rev}{'filename'}, $revs{$parent}{'filename'})
+
+ my $diff = open_pipe( @command )
or die "Failed to call git-diff for annotation: $!";
- _git_diff_parse($diff, $parent, $rev, %revinfo);
+ _git_diff_parse($diff, \@pseudo_parents, $rev, %revinfo);
close($diff);
}
sub _git_diff_parse {
- my ($diff, $parent, $rev, %revinfo) = @_;
+ my ($diff, $parents, $rev, %revinfo) = @_;
+
+ my $ri = 0;
- my ($ri, $pi) = (0,0);
my $slines = $revs{$rev}{'lines'};
- my @plines;
+ my (%plines, %pi);
my $gotheader = 0;
my ($remstart);
- my ($hunk_start, $hunk_index);
+ my $parent_count = @$parents;
+
+ my $diff_header_regexp = "^@";
+ $diff_header_regexp .= "@" x @$parents;
+ $diff_header_regexp .= ' -\d+,\d+' x @$parents;
+ $diff_header_regexp .= ' \+(\d+),\d+';
+ $diff_header_regexp .= " " . ("@" x @$parents);
+
+ my %claim_regexps;
+ my $allparentplus = '^' . '\\+' x @$parents . '(.*)$';
+
+ {
+ my $i = 0;
+ foreach my $parent (@$parents) {
+
+ $pi{$parent} = 0;
+ my $r = '^' . '.' x @$parents . '(.*)$';
+ my $p = $r;
+ substr($p,$i+1, 1) = '\\+';
+
+ my $m = $r;
+ substr($m,$i+1, 1) = '-';
+
+ $claim_regexps{$parent}{plus} = $p;
+ $claim_regexps{$parent}{minus} = $m;
+
+ $plines{$parent} = [];
+
+ $i++;
+ }
+ }
+
+ DIFF:
while(<$diff>) {
chomp;
- if (m/^@@ -(\d+),(\d+) \+(\d+),(\d+)/) {
- $remstart = $1;
- # Adjust for 0-based arrays
- $remstart--;
- # Reinit hunk tracking.
- $hunk_start = $remstart;
- $hunk_index = 0;
+ #printf("%d:%s:\n", $gotheader, $_);
+ if (m/$diff_header_regexp/) {
+ $remstart = $1 - 1;
+ # (0-based arrays)
+
$gotheader = 1;
- for (my $i = $ri; $i < $remstart; $i++) {
- $plines[$pi++] = $slines->[$i];
- $ri++;
+ foreach my $parent (@$parents) {
+ for (my $i = $ri; $i < $remstart; $i++) {
+ $plines{$parent}[$pi{$parent}++] = $slines->[$i];
+ }
}
- next;
- } elsif (!$gotheader) {
- next;
- }
+ $ri = $remstart;
- if (m/^\+(.*)$/) {
- my $line = $1;
- $plines[$pi++] = [ $line, '', '', '', 0 ];
- next;
+ next DIFF;
- } elsif (m/^-(.*)$/) {
- 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);
- }
- $ri++;
+ } elsif (!$gotheader) {
+ # Skip over the leadin.
+ next DIFF;
+ }
- } elsif (m/^\\/) {
+ if (m/^\\/) {
;
# Skip \No newline at end of file.
# But this can be internationalized, so only look
# for an initial \
} 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);
+ my %claims = ();
+ my $negclaim = 0;
+ my $allclaimed = 0;
+ my $line;
+
+ if (m/$allparentplus/) {
+ claim_line($ri, $rev, $slines, %revinfo);
+ $allclaimed = 1;
+
+ }
+
+ PARENT:
+ foreach my $parent (keys %claim_regexps) {
+ my $m = $claim_regexps{$parent}{minus};
+ my $p = $claim_regexps{$parent}{plus};
+
+ if (m/$m/) {
+ $line = $1;
+ $plines{$parent}[$pi{$parent}++] = [ $line, '', '', '', 0 ];
+ $negclaim++;
+
+ } elsif (m/$p/) {
+ $line = $1;
+ if (get_line($slines, $ri) eq $line) {
+ # Found a match, claim
+ $claims{$parent}++;
+
+ } else {
+ die sprintf("Sync error: %d\n|%s\n|%s\n%s => %s\n",
+ $ri, $line,
+ get_line($slines, $ri),
+ $rev, $parent);
+ }
+ }
+ }
+
+ if (%claims) {
+ foreach my $parent (@$parents) {
+ next if $claims{$parent} || $allclaimed;
+ $plines{$parent}[$pi{$parent}++] = $slines->[$ri];
+ #[ $line, '', '', '', 0 ];
+ }
+ $ri++;
+
+ } elsif ($negclaim) {
+ next DIFF;
+
+ } else {
+ if (substr($_,scalar @$parents) ne get_line($slines,$ri) ) {
+ foreach my $parent (@$parents) {
+ printf("parent %s is on line %d\n", $parent, $pi{$parent});
+ }
+
+ my @context;
+ for (my $i = -2; $i < 2; $i++) {
+ push @context, get_line($slines, $ri + $i);
+ }
+ my $context = join("\n", @context);
+
+ my $justline = substr($_, scalar @$parents);
+ die sprintf("Line %d, does not match:\n|%s|\n|%s|\n%s\n",
+ $ri,
+ $justline,
+ $context);
+ }
+ foreach my $parent (@$parents) {
+ $plines{$parent}[$pi{$parent}++] = $slines->[$ri];
+ }
+ $ri++;
}
- $plines[$pi++] = $slines->[$ri++];
}
- $hunk_index++;
}
+
for (my $i = $ri; $i < @{$slines} ; $i++) {
- push @plines, $slines->[$ri++];
+ foreach my $parent (@$parents) {
+ push @{$plines{$parent}}, $slines->[$ri];
+ }
+ $ri++;
+ }
+
+ foreach my $parent (@$parents) {
+ $revs{$parent}{lines} = $plines{$parent};
}
- $revs{$parent}{lines} = \@plines;
return;
}
return () unless defined $rev && defined $filename;
my $blob = git_ls_tree($rev, $filename);
+ die "Failed to find a blob for $filename in rev $rev\n" if !defined $blob;
my $catfile = open_pipe("git","cat-file", "blob", $blob)
or die "Failed to git-cat-file blob $blob (rev $rev, file $filename): " . $!;
my ($mode, $type, $blob, $tfilename);
while(<$lstree>) {
+ chomp;
($mode, $type, $blob, $tfilename) = split(/\s+/, $_, 4);
last if ($tfilename eq $filename);
}
close($lstree);
- return $blob if $filename eq $filename;
+ return $blob if ($tfilename eq $filename);
die "git-ls-tree failed to find blob for $filename";
}