Re: [PATCH] Proposal for git-svn

Benoit SIGOURE [off-list ref] wrote:

quoted

Hello,

I'm importing many SVN repositories in Git and I ran across a  
problem:
ufloat.h has mode 120000but is not a link

I've read the code and checked-out the revision where the problem
occured and it turns out that some stupid user commited a broken
symlink and I think that's where the problem came from.  I'm
proposing the following trivial change to let git-svn clone continue
its work:

diff --git a/git-svn.perl b/git-svn.perl
index 01c3904..a82baf4 100755
--- a/git-svn.perl
+++ b/git-svn.perl

@@ -2555,8 +2555,8 @@ sub close_file {
                sysseek($fh, 0, 0) or croak $!;
                if ($fb->{mode_b} == 120000) {
                        sysread($fh, my $buf, 5) == 5 or croak $!;
-                       $buf eq 'link ' or die "$path has mode  

120000",
-                                              "but is not a link\n";
+                       $buf eq 'link ' or warn "$path has mode  
120000",
+                                              " but is not a link 
\n";
                }
                defined(my $pid = open my $out,'-|') or die "Can't
fork: $!\n";
                if (!$pid) {

(I also added a whitespace because "120000but" does not look good :D)
I checked out the problematic revision in git and I see the broken
symlink just like in SVN so I assume this change is correct.

Very strange.  Since $buf didn't have the string "link " in it, did it
have a path name in it?  If so, the sysread() would've advanced the  
$fh
offset by 5 bytes; causing an even more broken symlink to be added  
by git.

Would the following be more correct?

--- a/git-svn.perl
+++ b/git-svn.perl

@@ -2552,9 +2552,15 @@ sub close_file {
 		}
 		sysseek($fh, 0, 0) or croak $!;
 		if ($fb->{mode_b} == 120000) {
-			sysread($fh, my $buf, 5) == 5 or croak $!;
-			$buf eq 'link ' or die "$path has mode 120000",
-			                       "but is not a link\n";
+			eval {
+				sysread($fh, my $buf, 5) == 5 or croak $!;
+				$buf eq 'link ' or die "$path has mode 120000",
+						       " but is not a link";
+			};
+			if ($@) {
+				warn "$@\n";
+				sysseek($fh, 0, 0) or croak $!;
+			}
 		}
 		defined(my $pid = open my $out,'-|') or die "Can't fork: $!\n";
 		if (!$pid) {