diff options
| -rw-r--r-- | Documentation/config.txt | 17 | ||||
| -rw-r--r-- | Documentation/git-pack-objects.txt | 14 | ||||
| -rw-r--r-- | builtin-pack-objects.c | 33 | ||||
| -rw-r--r-- | cache.h | 2 | ||||
| -rw-r--r-- | config.c | 18 | ||||
| -rw-r--r-- | csum-file.c | 4 | ||||
| -rw-r--r-- | csum-file.h | 2 | ||||
| -rw-r--r-- | environment.c | 4 |
8 files changed, 84 insertions, 10 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt index ea434af9db..382a31bb4f 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -204,10 +204,16 @@ core.warnAmbiguousRefs:: and might match multiple refs in the .git/refs/ tree. True by default. core.compression:: + An integer -1..9, indicating a default compression level. + -1 is the zlib default. 0 means no compression, + and 1..9 are various speed/size tradeoffs, 9 being slowest. + +core.loosecompression:: An integer -1..9, indicating the compression level for objects that - are not in a pack file. -1 is the zlib and git default. 0 means no + are not in a pack file. -1 is the zlib default. 0 means no compression, and 1..9 are various speed/size tradeoffs, 9 being - slowest. + slowest. If not set, defaults to core.compression. If that is + not set, defaults to 0 (best speed). core.legacyheaders:: A boolean which @@ -550,6 +556,13 @@ pack.depth:: The maximum delta depth used by gitlink:git-pack-objects[1] when no maximum depth is given on the command line. Defaults to 50. +pack.compression:: + An integer -1..9, indicating the compression level for objects + in a pack file. -1 is the zlib default. 0 means no + compression, and 1..9 are various speed/size tradeoffs, 9 being + slowest. If not set, defaults to core.compression. If that is + not set, defaults to -1. + pull.octopus:: The default merge strategy to use when pulling multiple branches at once. diff --git a/Documentation/git-pack-objects.txt b/Documentation/git-pack-objects.txt index ce892147dd..2531238df4 100644 --- a/Documentation/git-pack-objects.txt +++ b/Documentation/git-pack-objects.txt @@ -130,10 +130,22 @@ base-name:: --no-reuse-object:: This flag tells the command not to reuse existing object data at all, including non deltified object, forcing recompression of everything. - This implies --no-reuse-delta. Useful only in the obscur case where + This implies --no-reuse-delta. Useful only in the obscure case where wholesale enforcement of a different compression level on the packed data is desired. +--compression=[N]:: + Specifies compression level for newly-compressed data in the + generated pack. If not specified, pack compression level is + determined first by pack.compression, then by core.compression, + and defaults to -1, the zlib default, if neither is set. + Data copied from loose objects will be recompressed + if core.legacyheaders was true when they were created or if + the loose compression level (see core.loosecompression and + core.compression) is now a different value than the pack + compression level. Add --no-reuse-object if you want to force + a uniform compression level on all data no matter the source. + --delta-base-offset:: A packed archive can express base object of a delta as either 20-byte object name or as an offset in the diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c index d94c79a339..5c468aa50a 100644 --- a/builtin-pack-objects.c +++ b/builtin-pack-objects.c @@ -68,6 +68,8 @@ static int depth = 50; static int pack_to_stdout; static int num_preferred_base; static struct progress progress_state; +static int pack_compression_level = Z_DEFAULT_COMPRESSION; +static int pack_compression_seen; /* * The object names in objects array are hashed with this hashtable, @@ -427,7 +429,10 @@ static unsigned long write_object(struct sha1file *f, * and we do not need to deltify it. */ - if (!no_reuse_object && !entry->in_pack && !entry->delta) { + /* differing core & pack compression when loose object -> must recompress */ + if (!entry->in_pack && pack_compression_level != zlib_compression_level) + to_reuse = 0; + else if (!no_reuse_object && !entry->in_pack && !entry->delta) { unsigned char *map; unsigned long mapsize; map = map_sha1_file(entry->sha1, &mapsize); @@ -487,7 +492,7 @@ static unsigned long write_object(struct sha1file *f, sha1write(f, entry->delta->sha1, 20); hdrlen += 20; } - datalen = sha1write_compressed(f, buf, size); + datalen = sha1write_compressed(f, buf, size, pack_compression_level); free(buf); } else { @@ -1496,6 +1501,16 @@ static int git_pack_config(const char *k, const char *v) depth = git_config_int(k, v); return 0; } + if (!strcmp(k, "pack.compression")) { + int level = git_config_int(k, v); + if (level == -1) + level = Z_DEFAULT_COMPRESSION; + else if (level < 0 || level > Z_BEST_COMPRESSION) + die("bad pack compression level %d", level); + pack_compression_level = level; + pack_compression_seen = 1; + return 0; + } return git_default_config(k, v); } @@ -1607,6 +1622,8 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix) rp_ac = 2; git_config(git_pack_config); + if (!pack_compression_seen && core_compression_seen) + pack_compression_level = core_compression_level; progress = isatty(2); for (i = 1; i < argc; i++) { @@ -1627,6 +1644,18 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix) incremental = 1; continue; } + if (!prefixcmp(arg, "--compression=")) { + char *end; + int level = strtoul(arg+14, &end, 0); + if (!arg[14] || *end) + usage(pack_usage); + if (level == -1) + level = Z_DEFAULT_COMPRESSION; + else if (level < 0 || level > Z_BEST_COMPRESSION) + die("bad pack compression level %d", level); + pack_compression_level = level; + continue; + } if (!prefixcmp(arg, "--window=")) { char *end; window = strtoul(arg+9, &end, 0); @@ -283,6 +283,8 @@ extern int warn_ambiguous_refs; extern int shared_repository; extern const char *apply_default_whitespace; extern int zlib_compression_level; +extern int core_compression_level; +extern int core_compression_seen; extern size_t packed_git_window_size; extern size_t packed_git_limit; extern size_t delta_base_cache_limit; @@ -12,6 +12,8 @@ static FILE *config_file; static const char *config_file_name; static int config_linenr; +static int zlib_compression_seen; + static int get_next_char(void) { int c; @@ -304,13 +306,27 @@ int git_default_config(const char *var, const char *value) return 0; } - if (!strcmp(var, "core.compression")) { + if (!strcmp(var, "core.loosecompression")) { int level = git_config_int(var, value); if (level == -1) level = Z_DEFAULT_COMPRESSION; else if (level < 0 || level > Z_BEST_COMPRESSION) die("bad zlib compression level %d", level); zlib_compression_level = level; + zlib_compression_seen = 1; + return 0; + } + + if (!strcmp(var, "core.compression")) { + int level = git_config_int(var, value); + if (level == -1) + level = Z_DEFAULT_COMPRESSION; + else if (level < 0 || level > Z_BEST_COMPRESSION) + die("bad zlib compression level %d", level); + core_compression_level = level; + core_compression_seen = 1; + if (!zlib_compression_seen) + zlib_compression_level = level; return 0; } diff --git a/csum-file.c b/csum-file.c index 7c806ada48..7088f6e93f 100644 --- a/csum-file.c +++ b/csum-file.c @@ -119,14 +119,14 @@ struct sha1file *sha1fd(int fd, const char *name) return f; } -int sha1write_compressed(struct sha1file *f, void *in, unsigned int size) +int sha1write_compressed(struct sha1file *f, void *in, unsigned int size, int level) { z_stream stream; unsigned long maxsize; void *out; memset(&stream, 0, sizeof(stream)); - deflateInit(&stream, zlib_compression_level); + deflateInit(&stream, level); maxsize = deflateBound(&stream, size); out = xmalloc(maxsize); diff --git a/csum-file.h b/csum-file.h index 7e1339189d..4e8b83e093 100644 --- a/csum-file.h +++ b/csum-file.h @@ -16,7 +16,7 @@ extern struct sha1file *sha1fd(int fd, const char *name); extern struct sha1file *sha1create(const char *fmt, ...) __attribute__((format (printf, 1, 2))); extern int sha1close(struct sha1file *, unsigned char *, int); extern int sha1write(struct sha1file *, void *, unsigned int); -extern int sha1write_compressed(struct sha1file *, void *, unsigned int); +extern int sha1write_compressed(struct sha1file *, void *, unsigned int, int); extern void crc32_begin(struct sha1file *); extern uint32_t crc32_end(struct sha1file *); diff --git a/environment.c b/environment.c index 22316597df..b7aeb1a493 100644 --- a/environment.c +++ b/environment.c @@ -24,7 +24,9 @@ const char *git_commit_encoding; const char *git_log_output_encoding; int shared_repository = PERM_UMASK; const char *apply_default_whitespace; -int zlib_compression_level = Z_DEFAULT_COMPRESSION; +int zlib_compression_level = Z_BEST_SPEED; +int core_compression_level; +int core_compression_seen; size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE; size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT; size_t delta_base_cache_limit = 16 * 1024 * 1024; |