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git-svn: make (multi-)fetch safer but slower

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get_log with explicit paths is the safest way to get revisions
that change a particular path we're interested in.
Unfortunately that means we still have to run get_log multiple
times for each path we're interested in, and even more if
a path gets deleted.

The first argument of get_log() is an array reference, but we
shouldn't use more than one element in that array ref because
the non-existence of _one_ of those paths for a particular range
would cause an error for all paths in that range, so yes, we
need multiple get_log calls to be on the safe side...

Signed-off-by: Eric Wong <normalperson@yhbt.net>
This commit is contained in:
Eric Wong 2007-01-30 14:04:22 -08:00
parent c7eba7163b
commit d4eff2bda5
1 changed files with 36 additions and 37 deletions
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73
git-svn.perl
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@ -1038,27 +1038,15 @@ sub revisions_eq {
return 1;
}
sub match_paths {
my ($self, $paths) = @_;
return 1 if $paths->{'/'};
$self->{path_regex} ||= qr/^\/\Q$self->{path}\E\/?/;
grep /$self->{path_regex}/, keys %$paths and return 1;
my $c = '';
foreach (split m#/#, $self->rel_path) {
$c .= "/$_";
return 1 if $paths->{$c};
}
return 0;
}
sub find_parent_branch {
my ($self, $paths, $rev) = @_;
return undef unless $_follow_parent;
unless (defined $paths) {
my $err_handler = $SVN::Error::handler;
$SVN::Error::handler = \&Git::SVN::Ra::skip_unknown_revs;
$self->ra->get_log([$self->{path}], $rev, $rev, 0, 1, 1,
sub { $paths = dup_changed_paths($_[0]) });
$self->ra->get_log([$self->{path}], $rev, $rev, 0, 1, 1, sub {
$paths =
Git::SVN::Ra::dup_changed_paths($_[0]) });
$SVN::Error::handler = $err_handler;
}
return undef unless defined $paths;
@ -1134,7 +1122,6 @@ sub find_parent_branch {
or die "SVN connection failed somewhere...\n";
}
print STDERR "Successfully followed parent\n";
$ed->{new_fetch} = 1;
return $self->make_log_entry($rev, [$parent], $ed);
}
not_found:
@ -1170,7 +1157,6 @@ sub do_fetch {
return $log_entry;
}
$ed = SVN::Git::Fetcher->new($self);
$ed->{new_fetch} = 1;
}
unless ($self->ra->gs_do_update($last_rev, $rev, $self, $ed)) {
die "SVN connection failed somewhere...\n";
@ -1243,8 +1229,6 @@ sub make_log_entry {
my ($self, $rev, $parents, $ed) = @_;
my $untracked = $self->get_untracked($ed);
return undef if (! $ed->{new_fetch} && ! $ed->{nr} && ! @$untracked);
open my $un, '>>', "$self->{dir}/unhandled.log" or croak $!;
print $un "r$rev\n" or croak $!;
print $un $_, "\n" foreach @$untracked;
@ -2314,38 +2298,53 @@ sub gs_fetch_loop_common {
my ($self, $base, $head, @gs) = @_;
my $inc = 1000;
my ($min, $max) = ($base, $head < $base + $inc ? $head : $base + $inc);
my @paths = @gs == 1 ? ($gs[0]->{path}) : ('');
foreach my $gs (@gs) {
if (my $last_commit = $gs->last_commit) {
$gs->assert_index_clean($last_commit);
}
}
while (1) {
my @revs;
my %revs;
my $err;
my $err_handler = $SVN::Error::handler;
$SVN::Error::handler = sub {
($err) = @_;
skip_unknown_revs($err);
};
$self->get_log(\@paths, $min, $max, 0, 1, 1,
sub { push @revs, [ dup_changed_paths($_[0]), $_[1] ]; });
$SVN::Error::handler = $err_handler;
foreach my $gs (@gs) {
$self->get_log([$gs->{path}], $min, $max, 0, 1, 1, sub
{ my ($paths, $rev) = @_;
push @{$revs{$rev}},
[ $gs,
dup_changed_paths($paths) ] });
if (! @revs && $err && $max >= $head) {
print STDERR "Branch probably deleted:\n ",
$err->expanded_message,
"\nWill attempt to follow revisions ",
"r$min .. r$max ",
"committed before the deletion\n";
@revs = map { [ undef, $_ ] } ($min .. $max);
}
foreach (@revs) {
my ($paths, $r) = @$_;
foreach my $gs (@gs) {
if ($paths) {
$gs->match_paths($paths) or next;
next unless ($err && $max >= $head);
print STDERR "Path '$gs->{path}' ",
"was probably deleted:\n",
$err->expanded_message,
"\nWill attempt to follow ",
"revisions r$min .. r$max ",
"committed before the deletion\n";
my $hi = $max;
while (--$hi >= $min) {
my $ok;
$self->get_log([$gs->{path}], $min, $hi,
0, 1, 1, sub {
my ($paths, $rev) = @_;
$ok = $rev;
push @{$revs{$rev}}, [ $gs,
dup_changed_paths($_[0])]});
if ($ok) {
print STDERR "r$min .. r$ok OK\n";
last;
}
}
}
$SVN::Error::handler = $err_handler;
foreach my $r (sort {$a <=> $b} keys %revs) {
foreach (@{$revs{$r}}) {
my ($gs, $paths) = @$_;
my $lr = $gs->last_rev;
next if defined $lr && $lr >= $r;
next if defined $gs->rev_db_get($r);