builtin/commit-graph.c

   1 #include "builtin.h"
   2 #include "config.h"
   3 #include "dir.h"
   4 #include "lockfile.h"
   5 #include "parse-options.h"
   6 #include "repository.h"
   7 #include "commit-graph.h"
   8 #include "object-store.h"
   9 #include "progress.h"
  10 #include "tag.h"
  11
  12 #define BUILTIN_COMMIT_GRAPH_VERIFY_USAGE \
  13         N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]")
  14
  15 #define BUILTIN_COMMIT_GRAPH_WRITE_USAGE \
  16         N_("git commit-graph write [--object-dir <objdir>] [--append] " \
  17            "[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] " \
  18            "[--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress] " \
  19            "<split options>")
  20
  21 static const char * builtin_commit_graph_verify_usage[] = {
  22         BUILTIN_COMMIT_GRAPH_VERIFY_USAGE,
  23         NULL
  24 };
  25
  26 static const char * builtin_commit_graph_write_usage[] = {
  27         BUILTIN_COMMIT_GRAPH_WRITE_USAGE,
  28         NULL
  29 };
  30
  31 static char const * const builtin_commit_graph_usage[] = {
  32         BUILTIN_COMMIT_GRAPH_VERIFY_USAGE,
  33         BUILTIN_COMMIT_GRAPH_WRITE_USAGE,
  34         NULL,
  35 };
  36
  37 static struct opts_commit_graph {
  38         const char *obj_dir;
  39         int reachable;
  40         int stdin_packs;
  41         int stdin_commits;
  42         int append;
  43         int split;
  44         int shallow;
  45         int progress;
  46         int enable_changed_paths;
  47 } opts;
  48
  49 static struct option common_opts[] = {
  50         OPT_STRING(0, "object-dir", &opts.obj_dir,
  51                    N_("dir"),
  52                    N_("the object directory to store the graph")),
  53         OPT_BOOL(0, "progress", &opts.progress,
  54                  N_("force progress reporting")),
  55         OPT_END()
  56 };
  57
  58 static struct option *add_common_options(struct option *to)
  59 {
  60         return parse_options_concat(common_opts, to);
  61 }
  62
  63 static struct object_directory *find_odb(struct repository *r,
  64                                          const char *obj_dir)
  65 {
  66         struct object_directory *odb;
  67         char *obj_dir_real = real_pathdup(obj_dir, 1);
  68         struct strbuf odb_path_real = STRBUF_INIT;
  69
  70         prepare_alt_odb(r);
  71         for (odb = r->objects->odb; odb; odb = odb->next) {
  72                 strbuf_realpath(&odb_path_real, odb->path, 1);
  73                 if (!strcmp(obj_dir_real, odb_path_real.buf))
  74                         break;
  75         }
  76
  77         free(obj_dir_real);
  78         strbuf_release(&odb_path_real);
  79
  80         if (!odb)
  81                 die(_("could not find object directory matching %s"), obj_dir);
  82         return odb;
  83 }
  84
  85 static int graph_verify(int argc, const char **argv)
  86 {
  87         struct commit_graph *graph = NULL;
  88         struct object_directory *odb = NULL;
  89         char *graph_name;
  90         int open_ok;
  91         int fd;
  92         struct stat st;
  93         int flags = 0;
  94
  95         static struct option builtin_commit_graph_verify_options[] = {
  96                 OPT_BOOL(0, "shallow", &opts.shallow,
  97                          N_("if the commit-graph is split, only verify the tip file")),
  98                 OPT_END(),
  99         };
 100         struct option *options = add_common_options(builtin_commit_graph_verify_options);
 101
 102         trace2_cmd_mode("verify");
 103
 104         opts.progress = isatty(2);
 105         argc = parse_options(argc, argv, NULL,
 106                              options,
 107                              builtin_commit_graph_verify_usage, 0);
 108         if (argc)
 109                 usage_with_options(builtin_commit_graph_verify_usage, options);
 110
 111         if (!opts.obj_dir)
 112                 opts.obj_dir = get_object_directory();
 113         if (opts.shallow)
 114                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
 115         if (opts.progress)
 116                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 117
 118         odb = find_odb(the_repository, opts.obj_dir);
 119         graph_name = get_commit_graph_filename(odb);
 120         open_ok = open_commit_graph(graph_name, &fd, &st);
 121         if (!open_ok && errno != ENOENT)
 122                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
 123
 124         FREE_AND_NULL(graph_name);
 125         FREE_AND_NULL(options);
 126
 127         if (open_ok)
 128                 graph = load_commit_graph_one_fd_st(the_repository, fd, &st, odb);
 129         else
 130                 graph = read_commit_graph_one(the_repository, odb);
 131
 132         /* Return failure if open_ok predicted success */
 133         if (!graph)
 134                 return !!open_ok;
 135
 136         UNLEAK(graph);
 137         return verify_commit_graph(the_repository, graph, flags);
 138 }
 139
 140 extern int read_replace_refs;
 141 static struct commit_graph_opts write_opts;
 142
 143 static int write_option_parse_split(const struct option *opt, const char *arg,
 144                                     int unset)
 145 {
 146         enum commit_graph_split_flags *flags = opt->value;
 147
 148         BUG_ON_OPT_NEG(unset);
 149
 150         opts.split = 1;
 151         if (!arg)
 152                 return 0;
 153
 154         if (!strcmp(arg, "no-merge"))
 155                 *flags = COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED;
 156         else if (!strcmp(arg, "replace"))
 157                 *flags = COMMIT_GRAPH_SPLIT_REPLACE;
 158         else
 159                 die(_("unrecognized --split argument, %s"), arg);
 160
 161         return 0;
 162 }
 163
 164 static int read_one_commit(struct oidset *commits, struct progress *progress,
 165                            const char *hash)
 166 {
 167         struct object *result;
 168         struct object_id oid;
 169         const char *end;
 170
 171         if (parse_oid_hex(hash, &oid, &end))
 172                 return error(_("unexpected non-hex object ID: %s"), hash);
 173
 174         result = deref_tag(the_repository, parse_object(the_repository, &oid),
 175                            NULL, 0);
 176         if (!result)
 177                 return error(_("invalid object: %s"), hash);
 178         else if (object_as_type(result, OBJ_COMMIT, 1))
 179                 oidset_insert(commits, &result->oid);
 180
 181         display_progress(progress, oidset_size(commits));
 182
 183         return 0;
 184 }
 185
 186 static int write_option_max_new_filters(const struct option *opt,
 187                                         const char *arg,
 188                                         int unset)
 189 {
 190         int *to = opt->value;
 191         if (unset)
 192                 *to = -1;
 193         else {
 194                 const char *s;
 195                 *to = strtol(arg, (char **)&s, 10);
 196                 if (*s)
 197                         return error(_("%s expects a numerical value"),
 198                                      optname(opt, opt->flags));
 199         }
 200         return 0;
 201 }
 202
 203 static int git_commit_graph_write_config(const char *var, const char *value,
 204                                          void *cb)
 205 {
 206         if (!strcmp(var, "commitgraph.maxnewfilters"))
 207                 write_opts.max_new_filters = git_config_int(var, value);
 208         /*
 209          * No need to fall-back to 'git_default_config', since this was already
 210          * called in 'cmd_commit_graph()'.
 211          */
 212         return 0;
 213 }
 214
 215 static int graph_write(int argc, const char **argv)
 216 {
 217         struct string_list pack_indexes = STRING_LIST_INIT_NODUP;
 218         struct strbuf buf = STRBUF_INIT;
 219         struct oidset commits = OIDSET_INIT;
 220         struct object_directory *odb = NULL;
 221         int result = 0;
 222         enum commit_graph_write_flags flags = 0;
 223         struct progress *progress = NULL;
 224
 225         static struct option builtin_commit_graph_write_options[] = {
 226                 OPT_BOOL(0, "reachable", &opts.reachable,
 227                         N_("start walk at all refs")),
 228                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 229                         N_("scan pack-indexes listed by stdin for commits")),
 230                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 231                         N_("start walk at commits listed by stdin")),
 232                 OPT_BOOL(0, "append", &opts.append,
 233                         N_("include all commits already in the commit-graph file")),
 234                 OPT_BOOL(0, "changed-paths", &opts.enable_changed_paths,
 235                         N_("enable computation for changed paths")),
 236                 OPT_CALLBACK_F(0, "split", &write_opts.split_flags, NULL,
 237                         N_("allow writing an incremental commit-graph file"),
 238                         PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
 239                         write_option_parse_split),
 240                 OPT_INTEGER(0, "max-commits", &write_opts.max_commits,
 241                         N_("maximum number of commits in a non-base split commit-graph")),
 242                 OPT_INTEGER(0, "size-multiple", &write_opts.size_multiple,
 243                         N_("maximum ratio between two levels of a split commit-graph")),
 244                 OPT_EXPIRY_DATE(0, "expire-time", &write_opts.expire_time,
 245                         N_("only expire files older than a given date-time")),
 246                 OPT_CALLBACK_F(0, "max-new-filters", &write_opts.max_new_filters,
 247                         NULL, N_("maximum number of changed-path Bloom filters to compute"),
 248                         0, write_option_max_new_filters),
 249                 OPT_END(),
 250         };
 251         struct option *options = add_common_options(builtin_commit_graph_write_options);
 252
 253         opts.progress = isatty(2);
 254         opts.enable_changed_paths = -1;
 255         write_opts.size_multiple = 2;
 256         write_opts.max_commits = 0;
 257         write_opts.expire_time = 0;
 258         write_opts.max_new_filters = -1;
 259
 260         trace2_cmd_mode("write");
 261
 262         git_config(git_commit_graph_write_config, &opts);
 263
 264         argc = parse_options(argc, argv, NULL,
 265                              options,
 266                              builtin_commit_graph_write_usage, 0);
 267         if (argc)
 268                 usage_with_options(builtin_commit_graph_write_usage, options);
 269
 270         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 271                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 272         if (!opts.obj_dir)
 273                 opts.obj_dir = get_object_directory();
 274         if (opts.append)
 275                 flags |= COMMIT_GRAPH_WRITE_APPEND;
 276         if (opts.split)
 277                 flags |= COMMIT_GRAPH_WRITE_SPLIT;
 278         if (opts.progress)
 279                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 280         if (!opts.enable_changed_paths)
 281                 flags |= COMMIT_GRAPH_NO_WRITE_BLOOM_FILTERS;
 282         if (opts.enable_changed_paths == 1 ||
 283             git_env_bool(GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS, 0))
 284                 flags |= COMMIT_GRAPH_WRITE_BLOOM_FILTERS;
 285
 286         read_replace_refs = 0;
 287         odb = find_odb(the_repository, opts.obj_dir);
 288
 289         if (opts.reachable) {
 290                 if (write_commit_graph_reachable(odb, flags, &write_opts))
 291                         return 1;
 292                 return 0;
 293         }
 294
 295         if (opts.stdin_packs) {
 296                 while (strbuf_getline(&buf, stdin) != EOF)
 297                         string_list_append(&pack_indexes,
 298                                            strbuf_detach(&buf, NULL));
 299         } else if (opts.stdin_commits) {
 300                 oidset_init(&commits, 0);
 301                 if (opts.progress)
 302                         progress = start_delayed_progress(
 303                                 _("Collecting commits from input"), 0);
 304
 305                 while (strbuf_getline(&buf, stdin) != EOF) {
 306                         if (read_one_commit(&commits, progress, buf.buf)) {
 307                                 result = 1;
 308                                 goto cleanup;
 309                         }
 310                 }
 311
 312                 stop_progress(&progress);
 313         }
 314
 315         if (write_commit_graph(odb,
 316                                opts.stdin_packs ? &pack_indexes : NULL,
 317                                opts.stdin_commits ? &commits : NULL,
 318                                flags,
 319                                &write_opts))
 320                 result = 1;
 321
 322 cleanup:
 323         FREE_AND_NULL(options);
 324         string_list_clear(&pack_indexes, 0);
 325         strbuf_release(&buf);
 326         return result;
 327 }
 328
 329 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 330 {
 331         struct option *builtin_commit_graph_options = common_opts;
 332
 333         git_config(git_default_config, NULL);
 334         argc = parse_options(argc, argv, prefix,
 335                              builtin_commit_graph_options,
 336                              builtin_commit_graph_usage,
 337                              PARSE_OPT_STOP_AT_NON_OPTION);
 338         if (!argc)
 339                 goto usage;
 340
 341         save_commit_buffer = 0;
 342
 343         if (!strcmp(argv[0], "verify"))
 344                 return graph_verify(argc, argv);
 345         else if (argc && !strcmp(argv[0], "write"))
 346                 return graph_write(argc, argv);
 347
 348         error(_("unrecognized subcommand: %s"), argv[0]);
 349 usage:
 350         usage_with_options(builtin_commit_graph_usage,
 351                            builtin_commit_graph_options);
 352 }