| commit | cde8ea9c66e46ed6427499e0bc049d1d5c55379a | [log] [tgz] |
|---|---|---|
| author | René Scharfe <l.s.r@web.de> | Mon Nov 09 17:05:31 2020 +0100 |
| committer | Junio C Hamano <gitster@pobox.com> | Mon Nov 09 11:25:45 2020 -0800 |
| tree | dae3bf84c984e5a646594a154dbcf57d8aa2cbc7 | |
| parent | 898f80736c75878acc02dc55672317fcc0e0a5a6 [diff] |
archive: support compression levels beyond 9 Compression programs like zip, gzip, bzip2 and xz allow to adjust the trade-off between CPU cost and size gain with numerical options from -1 for fast compression and -9 for high compression ratio. zip also accepts -0 for storing files verbatim. git archive directly support these single-digit compression levels for ZIP output and passes them to filters like gzip. Zstandard additionally supports compression level options -10 to -19, or up to -22 with --ultra. This *seems* to work with git archive in most cases, e.g. it will produce an archive with -19 without complaining, but since it only supports single-digit compression level options this is the same as -1 -9 and thus -9. Allow git archive to accept multi-digit compression levels to support the full range supported by zstd. Explicitly reject them for the ZIP format, as otherwise deflateInit2() would just fail with a somewhat cryptic "stream consistency error". Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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