t7800: fix tests when difftool uses --no-symlinks

diff --git a/perl/Git.pm b/perl/Git.pm
index 377f7bafb779aeb7228419048d3f746179eda841..96cac39a4c8ebc0ce4e111271429fdf68b03bf97 100644 (file)
--- a/perl/Git.pm
+++ b/perl/Git.pm
@@ -59,6 +59,7 @@ =head1 SYNOPSIS
                 command_bidi_pipe command_close_bidi_pipe
                 version exec_path html_path hash_object git_cmd_try
                 remote_refs prompt
+                get_tz_offset
                 credential credential_read credential_write
                 temp_acquire temp_release temp_reset temp_path);
 
@@ -103,6 +104,7 @@ =head1 DESCRIPTION
 use Cwd qw(abs_path cwd);
 use IPC::Open2 qw(open2);
 use Fcntl qw(SEEK_SET SEEK_CUR);
+use Time::Local qw(timegm);
 }
 
 
@@ -515,6 +517,27 @@ sub version {
 
 sub html_path { command_oneline('--html-path') }
 
+
+=item get_tz_offset ( TIME )
+
+Return the time zone offset from GMT in the form +/-HHMM where HH is
+the number of hours from GMT and MM is the number of minutes.  This is
+the equivalent of what strftime("%z", ...) would provide on a GNU
+platform.
+
+If TIME is not supplied, the current local time is used.
+
+=cut
+
+sub get_tz_offset {
+       # some systmes don't handle or mishandle %z, so be creative.
+       my $t = shift || time;
+       my $gm = timegm(localtime($t));
+       my $sign = qw( + + - )[ $gm <=> $t ];
+       return sprintf("%s%02d%02d", $sign, (gmtime(abs($t - $gm)))[2,1]);
+}
+
+
 =item prompt ( PROMPT , ISPASSWORD  )
 
 Query user C<PROMPT> and return answer from user.
@@ -946,20 +969,22 @@ sub cat_blob {
        my $size = $1;
 
        my $blob;
-       my $bytesRead = 0;
+       my $bytesLeft = $size;
 
        while (1) {
-               my $bytesLeft = $size - $bytesRead;
                last unless $bytesLeft;
 
                my $bytesToRead = $bytesLeft < 1024 ? $bytesLeft : 1024;
-               my $read = read($in, $blob, $bytesToRead, $bytesRead);
+               my $read = read($in, $blob, $bytesToRead);
                unless (defined($read)) {
                        $self->_close_cat_blob();
                        throw Error::Simple("in pipe went bad");
                }
-
-               $bytesRead += $read;
+               unless (print $fh $blob) {
+                       $self->_close_cat_blob();
+                       throw Error::Simple("couldn't write to passed in filehandle");
+               }
+               $bytesLeft -= $read;
        }
 
        # Skip past the trailing newline.
@@ -974,11 +999,6 @@ sub cat_blob {
                throw Error::Simple("didn't find newline after blob");
        }
 
-       unless (print $fh $blob) {
-               $self->_close_cat_blob();
-               throw Error::Simple("couldn't write to passed in filehandle");
-       }
-
        return $size;
 }