read-cache: fix index corruption with index v4

diff --git a/perl/Git/SVN.pm b/perl/Git/SVN.pm
index 018beb85a09d6ef524c326c3ec947982c05bf556..98518f4ddb4c031417e313dcf4daaa68e9955be0 100644 (file)
--- a/perl/Git/SVN.pm
+++ b/perl/Git/SVN.pm
@@ -490,7 +490,7 @@ sub refname {
        #
        # Additionally, % must be escaped because it is used for escaping
        # and we want our escaped refname to be reversible
-       $refname =~ s{([ \%~\^:\?\*\[\t])}{sprintf('%%%02X',ord($1))}eg;
+       $refname =~ s{([ \%~\^:\?\*\[\t\\])}{sprintf('%%%02X',ord($1))}eg;
 
        # no slash-separated component can begin with a dot .
        # /.* becomes /%2E*
@@ -807,10 +807,15 @@ sub get_fetch_range {
        (++$min, $max);
 }
 
+sub svn_dir {
+       command_oneline(qw(rev-parse --git-path svn));
+}
+
 sub tmp_config {
        my (@args) = @_;
-       my $old_def_config = "$ENV{GIT_DIR}/svn/config";
-       my $config = "$ENV{GIT_DIR}/svn/.metadata";
+       my $svn_dir = svn_dir();
+       my $old_def_config = "$svn_dir/config";
+       my $config = "$svn_dir/.metadata";
        if (! -f $config && -f $old_def_config) {
                rename $old_def_config, $config or
                       die "Failed rename $old_def_config => $config: $!\n";
@@ -1658,7 +1663,17 @@ sub tie_for_persistent_memoization {
        if ($memo_backend > 0) {
                tie %$hash => 'Git::SVN::Memoize::YAML', "$path.yaml";
        } else {
-               tie %$hash => 'Memoize::Storable', "$path.db", 'nstore';
+               # first verify that any existing file can actually be loaded
+               # (it may have been saved by an incompatible version)
+               my $db = "$path.db";
+               if (-e $db) {
+                       use Storable qw(retrieve);
+
+                       if (!eval { retrieve($db); 1 }) {
+                               unlink $db or die "unlink $db failed: $!";
+                       }
+               }
+               tie %$hash => 'Memoize::Storable', $db, 'nstore';
        }
 }
 
@@ -1671,7 +1686,7 @@ sub tie_for_persistent_memoization {
                return if $memoized;
                $memoized = 1;
 
-               my $cache_path = "$ENV{GIT_DIR}/svn/.caches/";
+               my $cache_path = svn_dir() . '/.caches/';
                mkpath([$cache_path]) unless -d $cache_path;
 
                my %lookup_svn_merge_cache;
@@ -1712,7 +1727,7 @@ sub tie_for_persistent_memoization {
        sub clear_memoized_mergeinfo_caches {
                die "Only call this method in non-memoized context" if ($memoized);
 
-               my $cache_path = "$ENV{GIT_DIR}/svn/.caches/";
+               my $cache_path = svn_dir() . '/.caches/';
                return unless -d $cache_path;
 
                for my $cache_file (("$cache_path/lookup_svn_merge",
@@ -2446,12 +2461,13 @@ sub _new {
                             "refs/remotes/$prefix$default_ref_id";
        }
        $_[1] = $repo_id;
-       my $dir = "$ENV{GIT_DIR}/svn/$ref_id";
+       my $svn_dir = svn_dir();
+       my $dir = "$svn_dir/$ref_id";
 
-       # Older repos imported by us used $GIT_DIR/svn/foo instead of
-       # $GIT_DIR/svn/refs/remotes/foo when tracking refs/remotes/foo
+       # Older repos imported by us used $svn_dir/foo instead of
+       # $svn_dir/refs/remotes/foo when tracking refs/remotes/foo
        if ($ref_id =~ m{^refs/remotes/(.+)}) {
-               my $old_dir = "$ENV{GIT_DIR}/svn/$1";
+               my $old_dir = "$svn_dir/$1";
                if (-d $old_dir && ! -d $dir) {
                        $dir = $old_dir;
                }
@@ -2461,7 +2477,7 @@ sub _new {
        mkpath([$dir]);
        my $obj = bless {
                ref_id => $ref_id, dir => $dir, index => "$dir/index",
-               config => "$ENV{GIT_DIR}/svn/config",
+               config => "$svn_dir/config",
                map_root => "$dir/.rev_map", repo_id => $repo_id }, $class;
 
        # Ensure it gets canonicalized