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
  10 static char const * const builtin_commit_graph_usage[] = {
  11         N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
  12         N_("git commit-graph write [--object-dir <objdir>] [--append] "
  13            "[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] "
  14            "[--[no-]progress] <split options>"),
  15         NULL
  16 };
  17
  18 static const char * const builtin_commit_graph_verify_usage[] = {
  19         N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
  20         NULL
  21 };
  22
  23 static const char * const builtin_commit_graph_write_usage[] = {
  24         N_("git commit-graph write [--object-dir <objdir>] [--append] "
  25            "[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] "
  26            "[--[no-]progress] <split options>"),
  27         NULL
  28 };
  29
  30 static struct opts_commit_graph {
  31         const char *obj_dir;
  32         int reachable;
  33         int stdin_packs;
  34         int stdin_commits;
  35         int append;
  36         int split;
  37         int shallow;
  38         int progress;
  39 } opts;
  40
  41 static struct object_directory *find_odb(struct repository *r,
  42                                          const char *obj_dir)
  43 {
  44         struct object_directory *odb;
  45         char *obj_dir_real = real_pathdup(obj_dir, 1);
  46
  47         prepare_alt_odb(r);
  48         for (odb = r->objects->odb; odb; odb = odb->next) {
  49                 if (!strcmp(obj_dir_real, real_path(odb->path)))
  50                         break;
  51         }
  52
  53         free(obj_dir_real);
  54
  55         if (!odb)
  56                 die(_("could not find object directory matching %s"), obj_dir);
  57         return odb;
  58 }
  59
  60 static int graph_verify(int argc, const char **argv)
  61 {
  62         struct commit_graph *graph = NULL;
  63         struct object_directory *odb = NULL;
  64         char *graph_name;
  65         int open_ok;
  66         int fd;
  67         struct stat st;
  68         int flags = 0;
  69
  70         static struct option builtin_commit_graph_verify_options[] = {
  71                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  72                            N_("dir"),
  73                            N_("The object directory to store the graph")),
  74                 OPT_BOOL(0, "shallow", &opts.shallow,
  75                          N_("if the commit-graph is split, only verify the tip file")),
  76                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
  77                 OPT_END(),
  78         };
  79
  80         trace2_cmd_mode("verify");
  81
  82         opts.progress = isatty(2);
  83         argc = parse_options(argc, argv, NULL,
  84                              builtin_commit_graph_verify_options,
  85                              builtin_commit_graph_verify_usage, 0);
  86
  87         if (!opts.obj_dir)
  88                 opts.obj_dir = get_object_directory();
  89         if (opts.shallow)
  90                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
  91         if (opts.progress)
  92                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
  93
  94         odb = find_odb(the_repository, opts.obj_dir);
  95         graph_name = get_commit_graph_filename(odb);
  96         open_ok = open_commit_graph(graph_name, &fd, &st);
  97         if (!open_ok && errno != ENOENT)
  98                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
  99
 100         FREE_AND_NULL(graph_name);
 101
 102         if (open_ok)
 103                 graph = load_commit_graph_one_fd_st(fd, &st, odb);
 104         else
 105                 graph = read_commit_graph_one(the_repository, odb);
 106
 107         /* Return failure if open_ok predicted success */
 108         if (!graph)
 109                 return !!open_ok;
 110
 111         UNLEAK(graph);
 112         return verify_commit_graph(the_repository, graph, flags);
 113 }
 114
 115 extern int read_replace_refs;
 116 static struct split_commit_graph_opts split_opts;
 117
 118 static int write_option_parse_split(const struct option *opt, const char *arg,
 119                                     int unset)
 120 {
 121         enum commit_graph_split_flags *flags = opt->value;
 122
 123         opts.split = 1;
 124         if (!arg)
 125                 return 0;
 126
 127         if (!strcmp(arg, "no-merge"))
 128                 *flags = COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED;
 129         else if (!strcmp(arg, "replace"))
 130                 *flags = COMMIT_GRAPH_SPLIT_REPLACE;
 131         else
 132                 die(_("unrecognized --split argument, %s"), arg);
 133
 134         return 0;
 135 }
 136
 137 static int graph_write(int argc, const char **argv)
 138 {
 139         struct string_list *pack_indexes = NULL;
 140         struct oidset commits = OIDSET_INIT;
 141         struct object_directory *odb = NULL;
 142         struct string_list lines;
 143         int result = 0;
 144         enum commit_graph_write_flags flags = 0;
 145
 146         static struct option builtin_commit_graph_write_options[] = {
 147                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 148                         N_("dir"),
 149                         N_("The object directory to store the graph")),
 150                 OPT_BOOL(0, "reachable", &opts.reachable,
 151                         N_("start walk at all refs")),
 152                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 153                         N_("scan pack-indexes listed by stdin for commits")),
 154                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 155                         N_("start walk at commits listed by stdin")),
 156                 OPT_BOOL(0, "append", &opts.append,
 157                         N_("include all commits already in the commit-graph file")),
 158                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
 159                 OPT_CALLBACK_F(0, "split", &split_opts.flags, NULL,
 160                         N_("allow writing an incremental commit-graph file"),
 161                         PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
 162                         write_option_parse_split),
 163                 OPT_INTEGER(0, "max-commits", &split_opts.max_commits,
 164                         N_("maximum number of commits in a non-base split commit-graph")),
 165                 OPT_INTEGER(0, "size-multiple", &split_opts.size_multiple,
 166                         N_("maximum ratio between two levels of a split commit-graph")),
 167                 OPT_EXPIRY_DATE(0, "expire-time", &split_opts.expire_time,
 168                         N_("maximum number of commits in a non-base split commit-graph")),
 169                 OPT_END(),
 170         };
 171
 172         opts.progress = isatty(2);
 173         split_opts.size_multiple = 2;
 174         split_opts.max_commits = 0;
 175         split_opts.expire_time = 0;
 176
 177         trace2_cmd_mode("write");
 178
 179         argc = parse_options(argc, argv, NULL,
 180                              builtin_commit_graph_write_options,
 181                              builtin_commit_graph_write_usage, 0);
 182
 183         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 184                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 185         if (!opts.obj_dir)
 186                 opts.obj_dir = get_object_directory();
 187         if (opts.append)
 188                 flags |= COMMIT_GRAPH_WRITE_APPEND;
 189         if (opts.split)
 190                 flags |= COMMIT_GRAPH_WRITE_SPLIT;
 191         if (opts.progress)
 192                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 193
 194         read_replace_refs = 0;
 195         odb = find_odb(the_repository, opts.obj_dir);
 196
 197         if (opts.reachable) {
 198                 if (write_commit_graph_reachable(odb, flags, &split_opts))
 199                         return 1;
 200                 return 0;
 201         }
 202
 203         string_list_init(&lines, 0);
 204         if (opts.stdin_packs || opts.stdin_commits) {
 205                 struct strbuf buf = STRBUF_INIT;
 206
 207                 while (strbuf_getline(&buf, stdin) != EOF)
 208                         string_list_append(&lines, strbuf_detach(&buf, NULL));
 209
 210                 if (opts.stdin_packs)
 211                         pack_indexes = &lines;
 212                 if (opts.stdin_commits) {
 213                         struct string_list_item *item;
 214                         oidset_init(&commits, lines.nr);
 215                         for_each_string_list_item(item, &lines) {
 216                                 struct object_id oid;
 217                                 const char *end;
 218
 219                                 if (parse_oid_hex(item->string, &oid, &end)) {
 220                                         error(_("unexpected non-hex object ID: "
 221                                                 "%s"), item->string);
 222                                         return 1;
 223                                 }
 224
 225                                 oidset_insert(&commits, &oid);
 226                         }
 227                         flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS;
 228                 }
 229
 230                 UNLEAK(buf);
 231         }
 232
 233         if (write_commit_graph(odb,
 234                                pack_indexes,
 235                                opts.stdin_commits ? &commits : NULL,
 236                                flags,
 237                                &split_opts))
 238                 result = 1;
 239
 240         UNLEAK(lines);
 241         return result;
 242 }
 243
 244 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 245 {
 246         static struct option builtin_commit_graph_options[] = {
 247                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 248                         N_("dir"),
 249                         N_("The object directory to store the graph")),
 250                 OPT_END(),
 251         };
 252
 253         if (argc == 2 && !strcmp(argv[1], "-h"))
 254                 usage_with_options(builtin_commit_graph_usage,
 255                                    builtin_commit_graph_options);
 256
 257         git_config(git_default_config, NULL);
 258         argc = parse_options(argc, argv, prefix,
 259                              builtin_commit_graph_options,
 260                              builtin_commit_graph_usage,
 261                              PARSE_OPT_STOP_AT_NON_OPTION);
 262
 263         save_commit_buffer = 0;
 264
 265         if (argc > 0) {
 266                 if (!strcmp(argv[0], "verify"))
 267                         return graph_verify(argc, argv);
 268                 if (!strcmp(argv[0], "write"))
 269                         return graph_write(argc, argv);
 270         }
 271
 272         usage_with_options(builtin_commit_graph_usage,
 273                            builtin_commit_graph_options);
 274 }