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| author | René Scharfe <l.s.r@web.de> | 2020-11-09 17:05:31 +0100 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2020-11-09 20:25:45 +0100 |
| commit | cde8ea9c66e46ed6427499e0bc049d1d5c55379a (patch) | |
| tree | dae3bf84c984e5a646594a154dbcf57d8aa2cbc7 /archive.c | |
| parent | Git 2.29.2 (diff) | |
| download | git-cde8ea9c66e46ed6427499e0bc049d1d5c55379a.tar.xz git-cde8ea9c66e46ed6427499e0bc049d1d5c55379a.zip | |
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>
Diffstat (limited to 'archive.c')
| -rw-r--r-- | archive.c | 26 |
1 files changed, 11 insertions, 15 deletions
@@ -529,10 +529,12 @@ static int add_file_cb(const struct option *opt, const char *arg, int unset) return 0; } -#define OPT__COMPR(s, v, h, p) \ - OPT_SET_INT_F(s, NULL, v, h, p, PARSE_OPT_NONEG) -#define OPT__COMPR_HIDDEN(s, v, p) \ - OPT_SET_INT_F(s, NULL, v, "", p, PARSE_OPT_NONEG | PARSE_OPT_HIDDEN) +static int number_callback(const struct option *opt, const char *arg, int unset) +{ + BUG_ON_OPT_NEG(unset); + *(int *)opt->value = strtol(arg, NULL, 10); + return 0; +} static int parse_archive_args(int argc, const char **argv, const struct archiver **ar, struct archiver_args *args, @@ -561,16 +563,8 @@ static int parse_archive_args(int argc, const char **argv, OPT_BOOL(0, "worktree-attributes", &worktree_attributes, N_("read .gitattributes in working directory")), OPT__VERBOSE(&verbose, N_("report archived files on stderr")), - OPT__COMPR('0', &compression_level, N_("store only"), 0), - OPT__COMPR('1', &compression_level, N_("compress faster"), 1), - OPT__COMPR_HIDDEN('2', &compression_level, 2), - OPT__COMPR_HIDDEN('3', &compression_level, 3), - OPT__COMPR_HIDDEN('4', &compression_level, 4), - OPT__COMPR_HIDDEN('5', &compression_level, 5), - OPT__COMPR_HIDDEN('6', &compression_level, 6), - OPT__COMPR_HIDDEN('7', &compression_level, 7), - OPT__COMPR_HIDDEN('8', &compression_level, 8), - OPT__COMPR('9', &compression_level, N_("compress better"), 9), + OPT_NUMBER_CALLBACK(&compression_level, + N_("set compression level"), number_callback), OPT_GROUP(""), OPT_BOOL('l', "list", &list, N_("list supported archive formats")), @@ -617,7 +611,9 @@ static int parse_archive_args(int argc, const char **argv, args->compression_level = Z_DEFAULT_COMPRESSION; if (compression_level != -1) { - if ((*ar)->flags & ARCHIVER_WANT_COMPRESSION_LEVELS) + int levels_ok = (*ar)->flags & ARCHIVER_WANT_COMPRESSION_LEVELS; + int high_ok = (*ar)->flags & ARCHIVER_HIGH_COMPRESSION_LEVELS; + if (levels_ok && (compression_level <= 9 || high_ok)) args->compression_level = compression_level; else { die(_("Argument not supported for format '%s': -%d"), |