compression: Do not store filename in gzip files

It has no value for us and just wastes space.

2 files changed, 4 insertions, 3 deletions

diff --git a/gemato/compression.py b/gemato/compression.py
index cb3fa5a..11ede67 100644
--- a/gemato/compression.py
+++ b/gemato/compression.py
@@ -50,9 +50,9 @@ def open_compressed_file(suffix, f, mode='rb'):
                 def read1(self, *args, **kwargs):
                     return self.read(*args, **kwargs)
 
-            return FixedGzipFile(fileobj=f, mode=mode, mtime=0)
+            return FixedGzipFile(fileobj=f, mode=mode, filename='', mtime=0)
 
-        return gzip.GzipFile(fileobj=f, mode=mode, mtime=0)
+        return gzip.GzipFile(fileobj=f, mode=mode, filename='', mtime=0)
     elif suffix == "bz2" and bz2 is not None:
         return bz2.BZ2File(f, mode=mode)
     elif suffix == "lzma" and lzma is not None:
diff --git a/utils/gen_fast_manifest.py b/utils/gen_fast_manifest.py
index 9d58e46..8e4b244 100755
--- a/utils/gen_fast_manifest.py
+++ b/utils/gen_fast_manifest.py
@@ -103,7 +103,8 @@ def gen_manifest(top_dir):
 
     manifest_data = b'\n'.join(manifest_entries) + b'\n'
     if len(manifest_data) > 4096 and not compat_mode:
-        with gzip.GzipFile(os.path.join(top_dir, 'Manifest.gz'), 'wb', mtime=0) as f:
+        with gzip.GzipFile(os.path.join(top_dir, 'Manifest.gz'), 'wb',
+                           filename='', mtime=0) as f:
             f.write(manifest_data)
         if had_manifest:
             os.unlink(os.path.join(top_dir, 'Manifest'))