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contacts: gather all blame sources prior to invoking git-blame

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git-contacts invokes git-blame immediately upon encountering a patch
hunk. No attempt is made to consolidate invocations for multiple hunks
referencing the same file at the same revision. This can become
expensive quickly.

Any effort to reduce the number of times git-blame is run will need to
to know in advance which line ranges to blame per file per revision.
Make this information available by collecting all sources as a distinct
step from invoking git-blame.  A subsequent patch will utilize the
information to optimize git-blame invocations.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Sunshine 2013-08-09 17:39:55 -04:00 committed by Junio C Hamano
parent 9ae9ca1f95
commit db8cae7e60
1 changed files with 20 additions and 5 deletions
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25
contrib/contacts/git-contacts
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@ -74,8 +74,20 @@ sub get_blame {
close $f;
}
sub blame_sources {
my ($sources, $commits) = @_;
for my $s (keys %$sources) {
for my $id (keys %{$sources->{$s}}) {
for my $range (@{$sources->{$s}{$id}}) {
get_blame($commits, $s,
$range->[0], $range->[1], $id);
}
}
}
}
sub scan_patches {
my ($commits, $id, $f) = @_;
my ($sources, $id, $f) = @_;
my $source;
while (<$f>) {
if (/^From ([0-9a-f]{40}) Mon Sep 17 00:00:00 2001$/) {
@ -89,7 +101,7 @@ sub scan_patches {
die "Cannot parse hunk source: $_\n";
} elsif (/^@@ -(\d+)(?:,(\d+))?/ && $source) {
my $len = defined($2) ? $2 : 1;
get_blame($commits, $source, $1, $len, $id) if $len;
push @{$sources->{$source}{$id}}, [$1, $len] if $len;
}
}
}
@ -162,13 +174,16 @@ for (@ARGV) {
}
}
my %commits;
my %sources;
for (@files) {
scan_patch_file(\%commits, $_);
scan_patch_file(\%sources, $_);
}
if (@rev_args) {
scan_rev_args(\%commits, \@rev_args)
scan_rev_args(\%sources, \@rev_args)
}
my %commits;
blame_sources(\%sources, \%commits);
import_commits(\%commits);
my $contacts = {};