do not write null sha1s to on-disk index

diff --git a/git-cvsexportcommit.perl b/git-cvsexportcommit.perl
index 39a426e067c76e01d3f2a0d63243ec494436da46..e6bf25232c4ec27fc98f78e076678ae4d0a524c1 100755 (executable)
--- a/git-cvsexportcommit.perl
+++ b/git-cvsexportcommit.perl
@@ -30,6 +30,13 @@
                chomp($gd);
                $ENV{GIT_DIR} = $gd;
        }
+
+       # On MSYS, convert a Windows-style path to an MSYS-style path
+       # so that rel2abs() below works correctly.
+       if ($^O eq 'msys') {
+               $ENV{GIT_DIR} =~ s#^([[:alpha:]]):/#/$1/#;
+       }
+
        # Make sure GIT_DIR is absolute
        $ENV{GIT_DIR} = File::Spec->rel2abs($ENV{GIT_DIR});
 }