introduce "extensions" form of core.repositoryformatversion

diff --git a/perl/Git/SVN.pm b/perl/Git/SVN.pm
index f24372645b40f81faf75e735e402a1f4c400b2ed..152fb7e9274c779cb66de099878b4de40e5406e4 100644 (file)
--- a/perl/Git/SVN.pm
+++ b/perl/Git/SVN.pm
@@ -9,10 +9,8 @@ package Git::SVN;
            $_use_log_author $_add_author_from $_localtime/;
 use Carp qw/croak/;
 use File::Path qw/mkpath/;
-use File::Copy qw/copy/;
 use IPC::Open3;
 use Memoize;  # core since 5.8.0, Jul 2002
-use Memoize::Storable;
 use POSIX qw(:signal_h);
 use Time::Local;
 
@@ -33,11 +31,7 @@ package Git::SVN;
        add_path_to_url
 );
 
-my $can_use_yaml;
-BEGIN {
-       $can_use_yaml = eval { require Git::SVN::Memoize::YAML; 1};
-}
-
+my $memo_backend;
 our $_follow_parent  = 1;
 our $_minimize_url   = 'unset';
 our $default_repo_id = 'svn';
@@ -1579,7 +1573,16 @@ sub tie_for_persistent_memoization {
        my $hash = shift;
        my $path = shift;
 
-       if ($can_use_yaml) {
+       unless ($memo_backend) {
+               if (eval { require Git::SVN::Memoize::YAML; 1}) {
+                       $memo_backend = 1;
+               } else {
+                       require Memoize::Storable;
+                       $memo_backend = -1;
+               }
+       }
+
+       if ($memo_backend > 0) {
                tie %$hash => 'Git::SVN::Memoize::YAML', "$path.yaml";
        } else {
                tie %$hash => 'Memoize::Storable', "$path.db", 'nstore';
@@ -2189,8 +2192,9 @@ sub rev_map_set {
        # both of these options make our .rev_db file very, very important
        # and we can't afford to lose it because rebuild() won't work
        if ($self->use_svm_props || $self->no_metadata) {
+               require File::Copy;
                $sync = 1;
-               copy($db, $db_lock) or die "rev_map_set(@_): ",
+               File::Copy::copy($db, $db_lock) or die "rev_map_set(@_): ",
                                           "Failed to copy: ",
                                           "$db => $db_lock ($!)\n";
        } else {