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![Derrick Stolee](/assets/img/avatar_default.png)
The --object-dir argument to 'git multi-pack-index' allows a user to specify an alternate to use instead of the local $GITDIR. This is used by third-party tools like VFS for Git to maintain the pack-files in a "shared object cache" used by multiple clones. On Windows, the user can specify a path using a Windows-style file path with backslashes such as "C:\Path\To\ObjectDir". This same path style is used in the .git/objects/info/alternates file, so it already matches the path of that alternate. However, find_odb() converts these paths to real-paths for the comparison, which use forward slashes. As of the previous change, lookup_multi_pack_index() uses real-paths, so it correctly finds the target multi-pack-index when given these paths. Some commands such as 'git multi-pack-index repack' call child processes using the object_dir value, so it can be helpful to convert the path to the real-path before sending it to those locations. Add a callback to convert the real path immediately upon parsing the argument. We need to be careful that we don't store the exact value out of get_object_directory() and free it, or we could corrupt a later use of the_repository->objects->odb->path. We don't use get_object_directory() for the initial instantiation in cmd_multi_pack_index() because we need 'git multi-pack-index -h' to work without a Git repository. Signed-off-by: Derrick Stolee <derrickstolee@github.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
287 lines
7.6 KiB
C
287 lines
7.6 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "config.h"
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#include "parse-options.h"
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#include "midx.h"
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#include "trace2.h"
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#include "object-store.h"
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#define BUILTIN_MIDX_WRITE_USAGE \
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N_("git multi-pack-index [<options>] write [--preferred-pack=<pack>]" \
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"[--refs-snapshot=<path>]")
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#define BUILTIN_MIDX_VERIFY_USAGE \
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N_("git multi-pack-index [<options>] verify")
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#define BUILTIN_MIDX_EXPIRE_USAGE \
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N_("git multi-pack-index [<options>] expire")
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#define BUILTIN_MIDX_REPACK_USAGE \
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N_("git multi-pack-index [<options>] repack [--batch-size=<size>]")
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static char const * const builtin_multi_pack_index_write_usage[] = {
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BUILTIN_MIDX_WRITE_USAGE,
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NULL
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};
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static char const * const builtin_multi_pack_index_verify_usage[] = {
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BUILTIN_MIDX_VERIFY_USAGE,
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NULL
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};
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static char const * const builtin_multi_pack_index_expire_usage[] = {
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BUILTIN_MIDX_EXPIRE_USAGE,
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NULL
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};
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static char const * const builtin_multi_pack_index_repack_usage[] = {
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BUILTIN_MIDX_REPACK_USAGE,
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NULL
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};
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static char const * const builtin_multi_pack_index_usage[] = {
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BUILTIN_MIDX_WRITE_USAGE,
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BUILTIN_MIDX_VERIFY_USAGE,
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BUILTIN_MIDX_EXPIRE_USAGE,
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BUILTIN_MIDX_REPACK_USAGE,
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NULL
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};
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static struct opts_multi_pack_index {
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char *object_dir;
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const char *preferred_pack;
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const char *refs_snapshot;
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unsigned long batch_size;
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unsigned flags;
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int stdin_packs;
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} opts;
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static int parse_object_dir(const struct option *opt, const char *arg,
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int unset)
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{
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free(opts.object_dir);
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if (unset)
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opts.object_dir = xstrdup(get_object_directory());
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else
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opts.object_dir = real_pathdup(arg, 1);
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return 0;
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}
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static struct option common_opts[] = {
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OPT_CALLBACK(0, "object-dir", &opts.object_dir,
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N_("directory"),
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N_("object directory containing set of packfile and pack-index pairs"),
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parse_object_dir),
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OPT_END(),
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};
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static struct option *add_common_options(struct option *prev)
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{
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return parse_options_concat(common_opts, prev);
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}
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static int git_multi_pack_index_write_config(const char *var, const char *value,
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void *cb)
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{
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if (!strcmp(var, "pack.writebitmaphashcache")) {
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if (git_config_bool(var, value))
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opts.flags |= MIDX_WRITE_BITMAP_HASH_CACHE;
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else
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opts.flags &= ~MIDX_WRITE_BITMAP_HASH_CACHE;
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}
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/*
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* We should never make a fall-back call to 'git_default_config', since
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* this was already called in 'cmd_multi_pack_index()'.
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*/
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return 0;
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}
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static void read_packs_from_stdin(struct string_list *to)
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{
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struct strbuf buf = STRBUF_INIT;
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while (strbuf_getline(&buf, stdin) != EOF)
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string_list_append(to, buf.buf);
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string_list_sort(to);
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strbuf_release(&buf);
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}
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static int cmd_multi_pack_index_write(int argc, const char **argv)
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{
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struct option *options;
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static struct option builtin_multi_pack_index_write_options[] = {
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OPT_STRING(0, "preferred-pack", &opts.preferred_pack,
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N_("preferred-pack"),
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N_("pack for reuse when computing a multi-pack bitmap")),
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OPT_BIT(0, "bitmap", &opts.flags, N_("write multi-pack bitmap"),
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MIDX_WRITE_BITMAP | MIDX_WRITE_REV_INDEX),
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OPT_BIT(0, "progress", &opts.flags,
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N_("force progress reporting"), MIDX_PROGRESS),
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OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
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N_("write multi-pack index containing only given indexes")),
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OPT_FILENAME(0, "refs-snapshot", &opts.refs_snapshot,
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N_("refs snapshot for selecting bitmap commits")),
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OPT_END(),
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};
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opts.flags |= MIDX_WRITE_BITMAP_HASH_CACHE;
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git_config(git_multi_pack_index_write_config, NULL);
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options = add_common_options(builtin_multi_pack_index_write_options);
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trace2_cmd_mode(argv[0]);
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if (isatty(2))
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opts.flags |= MIDX_PROGRESS;
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argc = parse_options(argc, argv, NULL,
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options, builtin_multi_pack_index_write_usage,
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PARSE_OPT_KEEP_UNKNOWN);
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if (argc)
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usage_with_options(builtin_multi_pack_index_write_usage,
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options);
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FREE_AND_NULL(options);
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if (opts.stdin_packs) {
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struct string_list packs = STRING_LIST_INIT_DUP;
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int ret;
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read_packs_from_stdin(&packs);
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ret = write_midx_file_only(opts.object_dir, &packs,
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opts.preferred_pack,
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opts.refs_snapshot, opts.flags);
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string_list_clear(&packs, 0);
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return ret;
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}
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return write_midx_file(opts.object_dir, opts.preferred_pack,
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opts.refs_snapshot, opts.flags);
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}
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static int cmd_multi_pack_index_verify(int argc, const char **argv)
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{
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struct option *options;
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static struct option builtin_multi_pack_index_verify_options[] = {
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OPT_BIT(0, "progress", &opts.flags,
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N_("force progress reporting"), MIDX_PROGRESS),
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OPT_END(),
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};
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options = add_common_options(builtin_multi_pack_index_verify_options);
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trace2_cmd_mode(argv[0]);
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if (isatty(2))
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opts.flags |= MIDX_PROGRESS;
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argc = parse_options(argc, argv, NULL,
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options, builtin_multi_pack_index_verify_usage,
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PARSE_OPT_KEEP_UNKNOWN);
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if (argc)
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usage_with_options(builtin_multi_pack_index_verify_usage,
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options);
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FREE_AND_NULL(options);
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return verify_midx_file(the_repository, opts.object_dir, opts.flags);
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}
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static int cmd_multi_pack_index_expire(int argc, const char **argv)
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{
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struct option *options;
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static struct option builtin_multi_pack_index_expire_options[] = {
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OPT_BIT(0, "progress", &opts.flags,
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N_("force progress reporting"), MIDX_PROGRESS),
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OPT_END(),
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};
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options = add_common_options(builtin_multi_pack_index_expire_options);
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trace2_cmd_mode(argv[0]);
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if (isatty(2))
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opts.flags |= MIDX_PROGRESS;
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argc = parse_options(argc, argv, NULL,
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options, builtin_multi_pack_index_expire_usage,
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PARSE_OPT_KEEP_UNKNOWN);
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if (argc)
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usage_with_options(builtin_multi_pack_index_expire_usage,
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options);
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FREE_AND_NULL(options);
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return expire_midx_packs(the_repository, opts.object_dir, opts.flags);
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}
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static int cmd_multi_pack_index_repack(int argc, const char **argv)
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{
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struct option *options;
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static struct option builtin_multi_pack_index_repack_options[] = {
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OPT_MAGNITUDE(0, "batch-size", &opts.batch_size,
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N_("during repack, collect pack-files of smaller size into a batch that is larger than this size")),
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OPT_BIT(0, "progress", &opts.flags,
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N_("force progress reporting"), MIDX_PROGRESS),
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OPT_END(),
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};
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options = add_common_options(builtin_multi_pack_index_repack_options);
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trace2_cmd_mode(argv[0]);
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if (isatty(2))
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opts.flags |= MIDX_PROGRESS;
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argc = parse_options(argc, argv, NULL,
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options,
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builtin_multi_pack_index_repack_usage,
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PARSE_OPT_KEEP_UNKNOWN);
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if (argc)
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usage_with_options(builtin_multi_pack_index_repack_usage,
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options);
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FREE_AND_NULL(options);
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return midx_repack(the_repository, opts.object_dir,
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(size_t)opts.batch_size, opts.flags);
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}
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int cmd_multi_pack_index(int argc, const char **argv,
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const char *prefix)
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{
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int res;
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struct option *builtin_multi_pack_index_options = common_opts;
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git_config(git_default_config, NULL);
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if (the_repository &&
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the_repository->objects &&
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the_repository->objects->odb)
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opts.object_dir = xstrdup(the_repository->objects->odb->path);
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argc = parse_options(argc, argv, prefix,
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builtin_multi_pack_index_options,
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builtin_multi_pack_index_usage,
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PARSE_OPT_STOP_AT_NON_OPTION);
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if (!argc)
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goto usage;
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if (!strcmp(argv[0], "repack"))
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res = cmd_multi_pack_index_repack(argc, argv);
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else if (!strcmp(argv[0], "write"))
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res = cmd_multi_pack_index_write(argc, argv);
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else if (!strcmp(argv[0], "verify"))
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res = cmd_multi_pack_index_verify(argc, argv);
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else if (!strcmp(argv[0], "expire"))
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res = cmd_multi_pack_index_expire(argc, argv);
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else {
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error(_("unrecognized subcommand: %s"), argv[0]);
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goto usage;
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}
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free(opts.object_dir);
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return res;
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usage:
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usage_with_options(builtin_multi_pack_index_usage,
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builtin_multi_pack_index_options);
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}
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