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-rw-r--r--builtin/commit-graph.c328
1 files changed, 328 insertions, 0 deletions
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
new file mode 100644
index 0000000..e8f77f5
--- /dev/null
+++ b/builtin/commit-graph.c
@@ -0,0 +1,328 @@
+#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"
+
+#define BUILTIN_COMMIT_GRAPH_VERIFY_USAGE \
+ N_("git commit-graph verify [--object-dir <dir>] [--shallow] [--[no-]progress]")
+
+#define BUILTIN_COMMIT_GRAPH_WRITE_USAGE \
+ N_("git commit-graph write [--object-dir <dir>] [--append]\n" \
+ " [--split[=<strategy>]] [--reachable | --stdin-packs | --stdin-commits]\n" \
+ " [--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress]\n" \
+ " <split options>")
+
+static const char * builtin_commit_graph_verify_usage[] = {
+ BUILTIN_COMMIT_GRAPH_VERIFY_USAGE,
+ NULL
+};
+
+static const char * builtin_commit_graph_write_usage[] = {
+ BUILTIN_COMMIT_GRAPH_WRITE_USAGE,
+ NULL
+};
+
+static char const * const builtin_commit_graph_usage[] = {
+ BUILTIN_COMMIT_GRAPH_VERIFY_USAGE,
+ BUILTIN_COMMIT_GRAPH_WRITE_USAGE,
+ 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 option common_opts[] = {
+ OPT_STRING(0, "object-dir", &opts.obj_dir,
+ N_("dir"),
+ N_("the object directory to store the graph")),
+ OPT_END()
+};
+
+static struct option *add_common_options(struct option *to)
+{
+ return parse_options_concat(common_opts, to);
+}
+
+static int graph_verify(int argc, const char **argv, const char *prefix)
+{
+ 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_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(),
+ };
+ struct option *options = add_common_options(builtin_commit_graph_verify_options);
+
+ trace2_cmd_mode("verify");
+
+ opts.progress = isatty(2);
+ argc = parse_options(argc, argv, prefix,
+ options,
+ builtin_commit_graph_verify_usage, 0);
+ if (argc)
+ usage_with_options(builtin_commit_graph_verify_usage, options);
+
+ 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);
+ FREE_AND_NULL(options);
+
+ 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;
+
+ BUG_ON_OPT_NEG(unset);
+
+ 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(_("option `%s' expects a numerical value"),
+ "max-new-filters");
+ }
+ return 0;
+}
+
+static int git_commit_graph_write_config(const char *var, const char *value,
+ void *cb UNUSED)
+{
+ 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, const char *prefix)
+{
+ struct string_list pack_indexes = STRING_LIST_INIT_DUP;
+ 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_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_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_BOOL(0, "progress", &opts.progress,
+ N_("force progress reporting")),
+ OPT_END(),
+ };
+ struct option *options = add_common_options(builtin_commit_graph_write_options);
+
+ 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, prefix,
+ options,
+ builtin_commit_graph_write_usage, 0);
+ if (argc)
+ usage_with_options(builtin_commit_graph_write_usage, options);
+
+ 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;
+
+ 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_nodup(&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:
+ FREE_AND_NULL(options);
+ string_list_clear(&pack_indexes, 0);
+ strbuf_release(&buf);
+ return result;
+}
+
+int cmd_commit_graph(int argc, const char **argv, const char *prefix)
+{
+ parse_opt_subcommand_fn *fn = NULL;
+ struct option builtin_commit_graph_options[] = {
+ OPT_SUBCOMMAND("verify", &fn, graph_verify),
+ OPT_SUBCOMMAND("write", &fn, graph_write),
+ OPT_END(),
+ };
+ struct option *options = parse_options_concat(builtin_commit_graph_options, common_opts);
+
+ git_config(git_default_config, NULL);
+
+ read_replace_refs = 0;
+ save_commit_buffer = 0;
+
+ argc = parse_options(argc, argv, prefix, options,
+ builtin_commit_graph_usage, 0);
+ FREE_AND_NULL(options);
+
+ return fn(argc, argv, prefix);
+}