do not write null sha1s to on-disk index

diff --git a/git-cvsexportcommit.perl b/git-cvsexportcommit.perl
index 59b672213bfc36f95db089f0e13bafc1c2f2ed71..e6bf25232c4ec27fc98f78e076678ae4d0a524c1 100755 (executable)
--- a/git-cvsexportcommit.perl
+++ b/git-cvsexportcommit.perl
@@ -1,6 +1,8 @@
-#!/usr/bin/perl -w
+#!/usr/bin/perl
 
+use 5.008;
 use strict;
+use warnings;
 use Getopt::Std;
 use File::Temp qw(tempdir);
 use Data::Dumper;
@@ -28,6 +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});
 }