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builtin/multi-pack-index.c: split sub-commands 

Handle sub-commands of the 'git multi-pack-index' builtin (e.g.,
"write", "repack", etc.) separately from one another. This allows
sub-commands with unique options, without forcing cmd_multi_pack_index()
to reject invalid combinations itself.

This comes at the cost of some duplication and boilerplate. Luckily, the
duplication is reduced to a minimum, since common options are shared
among sub-commands due to a suggestion by Ævar. (Sub-commands do have to
retain the common options, too, since this builtin accepts common
options on either side of the sub-command).

Roughly speaking, cmd_multi_pack_index() parses options (including
common ones), and stops at the first non-option, which is the
sub-command. It then dispatches to the appropriate sub-command, which
parses the remaining options (also including common options).

Unknown options are kept by the sub-commands in order to detect their
presence (and complain that too many arguments were given).

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Taylor Blau 2021-03-30 11:03:57 -04:00 committed by Junio C Hamano
parent b25b727494
commit 60ca94769c
1 changed files with 105 additions and 25 deletions
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130
builtin/multi-pack-index.c
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@ -17,6 +17,22 @@
#define BUILTIN_MIDX_REPACK_USAGE \
N_("git multi-pack-index [<options>] repack [--batch-size=<size>]")
static char const * const builtin_multi_pack_index_write_usage[] = {
BUILTIN_MIDX_WRITE_USAGE,
NULL
};
static char const * const builtin_multi_pack_index_verify_usage[] = {
BUILTIN_MIDX_VERIFY_USAGE,
NULL
};
static char const * const builtin_multi_pack_index_expire_usage[] = {
BUILTIN_MIDX_EXPIRE_USAGE,
NULL
};
static char const * const builtin_multi_pack_index_repack_usage[] = {
BUILTIN_MIDX_REPACK_USAGE,
NULL
};
static char const * const builtin_multi_pack_index_usage[] = {
BUILTIN_MIDX_WRITE_USAGE,
BUILTIN_MIDX_VERIFY_USAGE,
@ -31,25 +47,98 @@ static struct opts_multi_pack_index {
unsigned flags;
} opts;
int cmd_multi_pack_index(int argc, const char **argv,
const char *prefix)
static struct option common_opts[] = {
OPT_FILENAME(0, "object-dir", &opts.object_dir,
N_("object directory containing set of packfile and pack-index pairs")),
OPT_BIT(0, "progress", &opts.flags, N_("force progress reporting"), MIDX_PROGRESS),
OPT_END(),
};
static struct option *add_common_options(struct option *prev)
{
static struct option builtin_multi_pack_index_options[] = {
OPT_FILENAME(0, "object-dir", &opts.object_dir,
N_("object directory containing set of packfile and pack-index pairs")),
OPT_BIT(0, "progress", &opts.flags, N_("force progress reporting"), MIDX_PROGRESS),
return parse_options_concat(common_opts, prev);
}
static int cmd_multi_pack_index_write(int argc, const char **argv)
{
struct option *options = common_opts;
argc = parse_options(argc, argv, NULL,
options, builtin_multi_pack_index_write_usage,
PARSE_OPT_KEEP_UNKNOWN);
if (argc)
usage_with_options(builtin_multi_pack_index_write_usage,
options);
return write_midx_file(opts.object_dir, opts.flags);
}
static int cmd_multi_pack_index_verify(int argc, const char **argv)
{
struct option *options = common_opts;
argc = parse_options(argc, argv, NULL,
options, builtin_multi_pack_index_verify_usage,
PARSE_OPT_KEEP_UNKNOWN);
if (argc)
usage_with_options(builtin_multi_pack_index_verify_usage,
options);
return verify_midx_file(the_repository, opts.object_dir, opts.flags);
}
static int cmd_multi_pack_index_expire(int argc, const char **argv)
{
struct option *options = common_opts;
argc = parse_options(argc, argv, NULL,
options, builtin_multi_pack_index_expire_usage,
PARSE_OPT_KEEP_UNKNOWN);
if (argc)
usage_with_options(builtin_multi_pack_index_expire_usage,
options);
return expire_midx_packs(the_repository, opts.object_dir, opts.flags);
}
static int cmd_multi_pack_index_repack(int argc, const char **argv)
{
struct option *options;
static struct option builtin_multi_pack_index_repack_options[] = {
OPT_MAGNITUDE(0, "batch-size", &opts.batch_size,
N_("during repack, collect pack-files of smaller size into a batch that is larger than this size")),
OPT_END(),
};
options = add_common_options(builtin_multi_pack_index_repack_options);
argc = parse_options(argc, argv, NULL,
options,
builtin_multi_pack_index_repack_usage,
PARSE_OPT_KEEP_UNKNOWN);
if (argc)
usage_with_options(builtin_multi_pack_index_repack_usage,
options);
FREE_AND_NULL(options);
return midx_repack(the_repository, opts.object_dir,
(size_t)opts.batch_size, opts.flags);
}
int cmd_multi_pack_index(int argc, const char **argv,
const char *prefix)
{
struct option *builtin_multi_pack_index_options = common_opts;
git_config(git_default_config, NULL);
if (isatty(2))
opts.flags |= MIDX_PROGRESS;
argc = parse_options(argc, argv, prefix,
builtin_multi_pack_index_options,
builtin_multi_pack_index_usage, 0);
builtin_multi_pack_index_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!opts.object_dir)
opts.object_dir = get_object_directory();
@ -58,25 +147,16 @@ int cmd_multi_pack_index(int argc, const char **argv,
usage_with_options(builtin_multi_pack_index_usage,
builtin_multi_pack_index_options);
if (argc > 1) {
die(_("too many arguments"));
return 1;
}
trace2_cmd_mode(argv[0]);
if (!strcmp(argv[0], "repack"))
return midx_repack(the_repository, opts.object_dir,
(size_t)opts.batch_size, opts.flags);
if (opts.batch_size)
die(_("--batch-size option is only for 'repack' subcommand"));
if (!strcmp(argv[0], "write"))
return write_midx_file(opts.object_dir, opts.flags);
if (!strcmp(argv[0], "verify"))
return verify_midx_file(the_repository, opts.object_dir, opts.flags);
if (!strcmp(argv[0], "expire"))
return expire_midx_packs(the_repository, opts.object_dir, opts.flags);
die(_("unrecognized subcommand: %s"), argv[0]);
return cmd_multi_pack_index_repack(argc, argv);
else if (!strcmp(argv[0], "write"))
return cmd_multi_pack_index_write(argc, argv);
else if (!strcmp(argv[0], "verify"))
return cmd_multi_pack_index_verify(argc, argv);
else if (!strcmp(argv[0], "expire"))
return cmd_multi_pack_index_expire(argc, argv);
else
die(_("unrecognized subcommand: %s"), argv[0]);
}