git.oblomov.eu Git - git/blob - 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 [--object-dir <objdir>]"),
  12         N_("git commit-graph read [--object-dir <objdir>]"),
  13         N_("git commit-graph verify [--object-dir <objdir>] [--shallow]"),
  14         N_("git commit-graph write [--object-dir <objdir>] [--append|--split] [--reachable|--stdin-packs|--stdin-commits] <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]"),
  20         NULL
  21 };
  22
  23 static const char * const builtin_commit_graph_read_usage[] = {
  24         N_("git commit-graph read [--object-dir <objdir>]"),
  25         NULL
  26 };
  27
  28 static const char * const builtin_commit_graph_write_usage[] = {
  29         N_("git commit-graph write [--object-dir <objdir>] [--append|--split] [--reachable|--stdin-packs|--stdin-commits] <split options>"),
  30         NULL
  31 };
  32
  33 static struct opts_commit_graph {
  34         const char *obj_dir;
  35         int reachable;
  36         int stdin_packs;
  37         int stdin_commits;
  38         int append;
  39         int split;
  40         int shallow;
  41 } opts;
  42
  43 static int graph_verify(int argc, const char **argv)
  44 {
  45         struct commit_graph *graph = NULL;
  46         char *graph_name;
  47         int open_ok;
  48         int fd;
  49         struct stat st;
  50         int flags = 0;
  51
  52         static struct option builtin_commit_graph_verify_options[] = {
  53                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  54                            N_("dir"),
  55                            N_("The object directory to store the graph")),
  56                 OPT_BOOL(0, "shallow", &opts.shallow,
  57                          N_("if the commit-graph is split, only verify the tip file")),
  58                 OPT_END(),
  59         };
  60
  61         trace2_cmd_mode("verify");
  62
  63         argc = parse_options(argc, argv, NULL,
  64                              builtin_commit_graph_verify_options,
  65                              builtin_commit_graph_verify_usage, 0);
  66
  67         if (!opts.obj_dir)
  68                 opts.obj_dir = get_object_directory();
  69         if (opts.shallow)
  70                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
  71
  72         graph_name = get_commit_graph_filename(opts.obj_dir);
  73         open_ok = open_commit_graph(graph_name, &fd, &st);
  74         if (!open_ok && errno != ENOENT)
  75                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
  76
  77         FREE_AND_NULL(graph_name);
  78
  79         if (open_ok)
  80                 graph = load_commit_graph_one_fd_st(fd, &st);
  81          else
  82                 graph = read_commit_graph_one(the_repository, opts.obj_dir);
  83
  84         /* Return failure if open_ok predicted success */
  85         if (!graph)
  86                 return !!open_ok;
  87
  88         UNLEAK(graph);
  89         return verify_commit_graph(the_repository, graph, flags);
  90 }
  91
  92 static int graph_read(int argc, const char **argv)
  93 {
  94         struct commit_graph *graph = NULL;
  95         char *graph_name;
  96         int open_ok;
  97         int fd;
  98         struct stat st;
  99
 100         static struct option builtin_commit_graph_read_options[] = {
 101                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 102                         N_("dir"),
 103                         N_("The object directory to store the graph")),
 104                 OPT_END(),
 105         };
 106
 107         trace2_cmd_mode("read");
 108
 109         argc = parse_options(argc, argv, NULL,
 110                              builtin_commit_graph_read_options,
 111                              builtin_commit_graph_read_usage, 0);
 112
 113         if (!opts.obj_dir)
 114                 opts.obj_dir = get_object_directory();
 115
 116         graph_name = get_commit_graph_filename(opts.obj_dir);
 117
 118         open_ok = open_commit_graph(graph_name, &fd, &st);
 119         if (!open_ok)
 120                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
 121
 122         graph = load_commit_graph_one_fd_st(fd, &st);
 123         if (!graph)
 124                 return 1;
 125
 126         FREE_AND_NULL(graph_name);
 127
 128         printf("header: %08x %d %d %d %d\n",
 129                 ntohl(*(uint32_t*)graph->data),
 130                 *(unsigned char*)(graph->data + 4),
 131                 *(unsigned char*)(graph->data + 5),
 132                 *(unsigned char*)(graph->data + 6),
 133                 *(unsigned char*)(graph->data + 7));
 134         printf("num_commits: %u\n", graph->num_commits);
 135         printf("chunks:");
 136
 137         if (graph->chunk_oid_fanout)
 138                 printf(" oid_fanout");
 139         if (graph->chunk_oid_lookup)
 140                 printf(" oid_lookup");
 141         if (graph->chunk_commit_data)
 142                 printf(" commit_metadata");
 143         if (graph->chunk_extra_edges)
 144                 printf(" extra_edges");
 145         printf("\n");
 146
 147         UNLEAK(graph);
 148
 149         return 0;
 150 }
 151
 152 extern int read_replace_refs;
 153 static struct split_commit_graph_opts split_opts;
 154
 155 static int graph_write(int argc, const char **argv)
 156 {
 157         struct string_list *pack_indexes = NULL;
 158         struct string_list *commit_hex = NULL;
 159         struct string_list lines;
 160         int result = 0;
 161         enum commit_graph_write_flags flags = COMMIT_GRAPH_WRITE_PROGRESS;
 162
 163         static struct option builtin_commit_graph_write_options[] = {
 164                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 165                         N_("dir"),
 166                         N_("The object directory to store the graph")),
 167                 OPT_BOOL(0, "reachable", &opts.reachable,
 168                         N_("start walk at all refs")),
 169                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 170                         N_("scan pack-indexes listed by stdin for commits")),
 171                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 172                         N_("start walk at commits listed by stdin")),
 173                 OPT_BOOL(0, "append", &opts.append,
 174                         N_("include all commits already in the commit-graph file")),
 175                 OPT_BOOL(0, "split", &opts.split,
 176                         N_("allow writing an incremental commit-graph file")),
 177                 OPT_INTEGER(0, "max-commits", &split_opts.max_commits,
 178                         N_("maximum number of commits in a non-base split commit-graph")),
 179                 OPT_INTEGER(0, "size-multiple", &split_opts.size_multiple,
 180                         N_("maximum ratio between two levels of a split commit-graph")),
 181                 OPT_EXPIRY_DATE(0, "expire-time", &split_opts.expire_time,
 182                         N_("maximum number of commits in a non-base split commit-graph")),
 183                 OPT_END(),
 184         };
 185
 186         split_opts.size_multiple = 2;
 187         split_opts.max_commits = 0;
 188         split_opts.expire_time = 0;
 189
 190         trace2_cmd_mode("write");
 191
 192         argc = parse_options(argc, argv, NULL,
 193                              builtin_commit_graph_write_options,
 194                              builtin_commit_graph_write_usage, 0);
 195
 196         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 197                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 198         if (!opts.obj_dir)
 199                 opts.obj_dir = get_object_directory();
 200         if (opts.append)
 201                 flags |= COMMIT_GRAPH_WRITE_APPEND;
 202         if (opts.split)
 203                 flags |= COMMIT_GRAPH_WRITE_SPLIT;
 204
 205         read_replace_refs = 0;
 206
 207         if (opts.reachable) {
 208                 if (write_commit_graph_reachable(opts.obj_dir, flags, &split_opts))
 209                         return 1;
 210                 return 0;
 211         }
 212
 213         string_list_init(&lines, 0);
 214         if (opts.stdin_packs || opts.stdin_commits) {
 215                 struct strbuf buf = STRBUF_INIT;
 216
 217                 while (strbuf_getline(&buf, stdin) != EOF)
 218                         string_list_append(&lines, strbuf_detach(&buf, NULL));
 219
 220                 if (opts.stdin_packs)
 221                         pack_indexes = &lines;
 222                 if (opts.stdin_commits) {
 223                         commit_hex = &lines;
 224                         flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS;
 225                 }
 226
 227                 UNLEAK(buf);
 228         }
 229
 230         if (write_commit_graph(opts.obj_dir,
 231                                pack_indexes,
 232                                commit_hex,
 233                                flags,
 234                                &split_opts))
 235                 result = 1;
 236
 237         UNLEAK(lines);
 238         return result;
 239 }
 240
 241 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 242 {
 243         static struct option builtin_commit_graph_options[] = {
 244                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 245                         N_("dir"),
 246                         N_("The object directory to store the graph")),
 247                 OPT_END(),
 248         };
 249
 250         if (argc == 2 && !strcmp(argv[1], "-h"))
 251                 usage_with_options(builtin_commit_graph_usage,
 252                                    builtin_commit_graph_options);
 253
 254         git_config(git_default_config, NULL);
 255         argc = parse_options(argc, argv, prefix,
 256                              builtin_commit_graph_options,
 257                              builtin_commit_graph_usage,
 258                              PARSE_OPT_STOP_AT_NON_OPTION);
 259
 260         if (argc > 0) {
 261                 if (!strcmp(argv[0], "read"))
 262                         return graph_read(argc, argv);
 263                 if (!strcmp(argv[0], "verify"))
 264                         return graph_verify(argc, argv);
 265                 if (!strcmp(argv[0], "write"))
 266                         return graph_write(argc, argv);
 267         }
 268
 269         usage_with_options(builtin_commit_graph_usage,
 270                            builtin_commit_graph_options);
 271 }