commit-graph.c
#include "builtin.h"
#include "config.h"
#include "dir.h"
#include "lockfile.h"
#include "parse-options.h"
#include "repository.h"
#include "commit-graph.h"
#include "object-store.h"
#include "progress.h"
#include "tag.h"
static char const * const builtin_commit_graph_usage[] = {
N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
N_("git commit-graph write [--object-dir <objdir>] [--append] "
"[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] "
"[--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress] "
"<split options>"),
NULL
};
static const char * const builtin_commit_graph_verify_usage[] = {
N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
NULL
};
static const char * const builtin_commit_graph_write_usage[] = {
N_("git commit-graph write [--object-dir <objdir>] [--append] "
"[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] "
"[--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress] "
"<split options>"),
NULL
};
static struct opts_commit_graph {
const char *obj_dir;
int reachable;
int stdin_packs;
int stdin_commits;
int append;
int split;
int shallow;
int progress;
int enable_changed_paths;
} opts;
static struct object_directory *find_odb(struct repository *r,
const char *obj_dir)
{
struct object_directory *odb;
char *obj_dir_real = real_pathdup(obj_dir, 1);
struct strbuf odb_path_real = STRBUF_INIT;
prepare_alt_odb(r);
for (odb = r->objects->odb; odb; odb = odb->next) {
strbuf_realpath(&odb_path_real, odb->path, 1);
if (!strcmp(obj_dir_real, odb_path_real.buf))
break;
}
free(obj_dir_real);
strbuf_release(&odb_path_real);
if (!odb)
die(_("could not find object directory matching %s"), obj_dir);
return odb;
}
static int graph_verify(int argc, const char **argv)
{
struct commit_graph *graph = NULL;
struct object_directory *odb = NULL;
char *graph_name;
int open_ok;
int fd;
struct stat st;
int flags = 0;
static struct option builtin_commit_graph_verify_options[] = {
OPT_STRING(0, "object-dir", &opts.obj_dir,
N_("dir"),
N_("The object directory to store the graph")),
OPT_BOOL(0, "shallow", &opts.shallow,
N_("if the commit-graph is split, only verify the tip file")),
OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
OPT_END(),
};
trace2_cmd_mode("verify");
opts.progress = isatty(2);
argc = parse_options(argc, argv, NULL,
builtin_commit_graph_verify_options,
builtin_commit_graph_verify_usage, 0);
if (!opts.obj_dir)
opts.obj_dir = get_object_directory();
if (opts.shallow)
flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
if (opts.progress)
flags |= COMMIT_GRAPH_WRITE_PROGRESS;
odb = find_odb(the_repository, opts.obj_dir);
graph_name = get_commit_graph_filename(odb);
open_ok = open_commit_graph(graph_name, &fd, &st);
if (!open_ok && errno != ENOENT)
die_errno(_("Could not open commit-graph '%s'"), graph_name);
FREE_AND_NULL(graph_name);
if (open_ok)
graph = load_commit_graph_one_fd_st(the_repository, fd, &st, odb);
else
graph = read_commit_graph_one(the_repository, odb);
/* Return failure if open_ok predicted success */
if (!graph)
return !!open_ok;
UNLEAK(graph);
return verify_commit_graph(the_repository, graph, flags);
}
extern int read_replace_refs;
static struct commit_graph_opts write_opts;
static int write_option_parse_split(const struct option *opt, const char *arg,
int unset)
{
enum commit_graph_split_flags *flags = opt->value;
opts.split = 1;
if (!arg)
return 0;
if (!strcmp(arg, "no-merge"))
*flags = COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED;
else if (!strcmp(arg, "replace"))
*flags = COMMIT_GRAPH_SPLIT_REPLACE;
else
die(_("unrecognized --split argument, %s"), arg);
return 0;
}
static int read_one_commit(struct oidset *commits, struct progress *progress,
const char *hash)
{
struct object *result;
struct object_id oid;
const char *end;
if (parse_oid_hex(hash, &oid, &end))
return error(_("unexpected non-hex object ID: %s"), hash);
result = deref_tag(the_repository, parse_object(the_repository, &oid),
NULL, 0);
if (!result)
return error(_("invalid object: %s"), hash);
else if (object_as_type(result, OBJ_COMMIT, 1))
oidset_insert(commits, &result->oid);
display_progress(progress, oidset_size(commits));
return 0;
}
static int write_option_max_new_filters(const struct option *opt,
const char *arg,
int unset)
{
int *to = opt->value;
if (unset)
*to = -1;
else {
const char *s;
*to = strtol(arg, (char **)&s, 10);
if (*s)
return error(_("%s expects a numerical value"),
optname(opt, opt->flags));
}
return 0;
}
static int git_commit_graph_write_config(const char *var, const char *value,
void *cb)
{
if (!strcmp(var, "commitgraph.maxnewfilters"))
write_opts.max_new_filters = git_config_int(var, value);
/*
* No need to fall-back to 'git_default_config', since this was already
* called in 'cmd_commit_graph()'.
*/
return 0;
}
static int graph_write(int argc, const char **argv)
{
struct string_list pack_indexes = STRING_LIST_INIT_NODUP;
struct strbuf buf = STRBUF_INIT;
struct oidset commits = OIDSET_INIT;
struct object_directory *odb = NULL;
int result = 0;
enum commit_graph_write_flags flags = 0;
struct progress *progress = NULL;
static struct option builtin_commit_graph_write_options[] = {
OPT_STRING(0, "object-dir", &opts.obj_dir,
N_("dir"),
N_("The object directory to store the graph")),
OPT_BOOL(0, "reachable", &opts.reachable,
N_("start walk at all refs")),
OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
N_("scan pack-indexes listed by stdin for commits")),
OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
N_("start walk at commits listed by stdin")),
OPT_BOOL(0, "append", &opts.append,
N_("include all commits already in the commit-graph file")),
OPT_BOOL(0, "changed-paths", &opts.enable_changed_paths,
N_("enable computation for changed paths")),
OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
OPT_CALLBACK_F(0, "split", &write_opts.split_flags, NULL,
N_("allow writing an incremental commit-graph file"),
PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
write_option_parse_split),
OPT_INTEGER(0, "max-commits", &write_opts.max_commits,
N_("maximum number of commits in a non-base split commit-graph")),
OPT_INTEGER(0, "size-multiple", &write_opts.size_multiple,
N_("maximum ratio between two levels of a split commit-graph")),
OPT_EXPIRY_DATE(0, "expire-time", &write_opts.expire_time,
N_("only expire files older than a given date-time")),
OPT_CALLBACK_F(0, "max-new-filters", &write_opts.max_new_filters,
NULL, N_("maximum number of changed-path Bloom filters to compute"),
0, write_option_max_new_filters),
OPT_END(),
};
opts.progress = isatty(2);
opts.enable_changed_paths = -1;
write_opts.size_multiple = 2;
write_opts.max_commits = 0;
write_opts.expire_time = 0;
write_opts.max_new_filters = -1;
trace2_cmd_mode("write");
git_config(git_commit_graph_write_config, &opts);
argc = parse_options(argc, argv, NULL,
builtin_commit_graph_write_options,
builtin_commit_graph_write_usage, 0);
if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
if (!opts.obj_dir)
opts.obj_dir = get_object_directory();
if (opts.append)
flags |= COMMIT_GRAPH_WRITE_APPEND;
if (opts.split)
flags |= COMMIT_GRAPH_WRITE_SPLIT;
if (opts.progress)
flags |= COMMIT_GRAPH_WRITE_PROGRESS;
if (!opts.enable_changed_paths)
flags |= COMMIT_GRAPH_NO_WRITE_BLOOM_FILTERS;
if (opts.enable_changed_paths == 1 ||
git_env_bool(GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS, 0))
flags |= COMMIT_GRAPH_WRITE_BLOOM_FILTERS;
read_replace_refs = 0;
odb = find_odb(the_repository, opts.obj_dir);
if (opts.reachable) {
if (write_commit_graph_reachable(odb, flags, &write_opts))
return 1;
return 0;
}
if (opts.stdin_packs) {
while (strbuf_getline(&buf, stdin) != EOF)
string_list_append(&pack_indexes,
strbuf_detach(&buf, NULL));
} else if (opts.stdin_commits) {
oidset_init(&commits, 0);
if (opts.progress)
progress = start_delayed_progress(
_("Collecting commits from input"), 0);
while (strbuf_getline(&buf, stdin) != EOF) {
if (read_one_commit(&commits, progress, buf.buf)) {
result = 1;
goto cleanup;
}
}
stop_progress(&progress);
}
if (write_commit_graph(odb,
opts.stdin_packs ? &pack_indexes : NULL,
opts.stdin_commits ? &commits : NULL,
flags,
&write_opts))
result = 1;
cleanup:
string_list_clear(&pack_indexes, 0);
strbuf_release(&buf);
return result;
}
int cmd_commit_graph(int argc, const char **argv, const char *prefix)
{
static struct option builtin_commit_graph_options[] = {
OPT_STRING(0, "object-dir", &opts.obj_dir,
N_("dir"),
N_("The object directory to store the graph")),
OPT_END(),
};
if (argc == 2 && !strcmp(argv[1], "-h"))
usage_with_options(builtin_commit_graph_usage,
builtin_commit_graph_options);
git_config(git_default_config, NULL);
argc = parse_options(argc, argv, prefix,
builtin_commit_graph_options,
builtin_commit_graph_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
save_commit_buffer = 0;
if (argc > 0) {
if (!strcmp(argv[0], "verify"))
return graph_verify(argc, argv);
if (!strcmp(argv[0], "write"))
return graph_write(argc, argv);
}
usage_with_options(builtin_commit_graph_usage,
builtin_commit_graph_options);
}