dgit: work around deprecation of GZIP

This makes things slower.  But it avoids this warning
  gzip: warning: GZIP environment variable is deprecated; use an alias or script

IMO this deprecation was a bad idea, but the boat has sailed.

The new code here is less concurrent (which is bad) but the
alternatives are rather more code to set up.

Closes: #975624
Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 4 insertions, 3 deletions

diff --git a/dgit b/dgit
index 283f967..0e457c6 100755
--- a/dgit
+++ b/dgit
@@ -6055,10 +6055,11 @@ END
         push @files, $maybe;
     }
 
-    my $debtar= srcfn $fakeversion,'.debian.tar.gz';
-    runcmd qw(env GZIP=-1n tar -zcf), "./$debtar", qw(-C), $maindir, @files;
+    my $debtar= srcfn $fakeversion,'.debian.tar';
+    runcmd qw(tar -cf), "./$debtar", qw(-C), $maindir, @files;
+    runcmd qw(gzip -1n), "./$debtar";
 
-    $dscaddfile->($debtar);
+    $dscaddfile->("$debtar.gz");
     close $fakedsc or confess "$!";
 }