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 read [--object-dir <objdir>]"),
  12         N_("git commit-graph verify [--object-dir <objdir>] [--shallow]"),
  13         N_("git commit-graph write [--object-dir <objdir>] [--append|--split] [--reachable|--stdin-packs|--stdin-commits] <split options>"),
  14         NULL
  15 };
  16
  17 static const char * const builtin_commit_graph_verify_usage[] = {
  18         N_("git commit-graph verify [--object-dir <objdir>] [--shallow]"),
  19         NULL
  20 };
  21
  22 static const char * const builtin_commit_graph_read_usage[] = {
  23         N_("git commit-graph read [--object-dir <objdir>]"),
  24         NULL
  25 };
  26
  27 static const char * const builtin_commit_graph_write_usage[] = {
  28         N_("git commit-graph write [--object-dir <objdir>] [--append|--split] [--reachable|--stdin-packs|--stdin-commits] <split options>"),
  29         NULL
  30 };
  31
  32 static struct opts_commit_graph {
  33         const char *obj_dir;
  34         int reachable;
  35         int stdin_packs;
  36         int stdin_commits;
  37         int append;
  38         int split;
  39         int shallow;
  40 } opts;
  41
  42 static int graph_verify(int argc, const char **argv)
  43 {
  44         struct commit_graph *graph = NULL;
  45         char *graph_name;
  46         int open_ok;
  47         int fd;
  48         struct stat st;
  49         int flags = 0;
  50
  51         static struct option builtin_commit_graph_verify_options[] = {
  52                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  53                            N_("dir"),
  54                            N_("The object directory to store the graph")),
  55                 OPT_BOOL(0, "shallow", &opts.shallow,
  56                          N_("if the commit-graph is split, only verify the tip file")),
  57                 OPT_END(),
  58         };
  59
  60         argc = parse_options(argc, argv, NULL,
  61                              builtin_commit_graph_verify_options,
  62                              builtin_commit_graph_verify_usage, 0);
  63
  64         if (!opts.obj_dir)
  65                 opts.obj_dir = get_object_directory();
  66         if (opts.shallow)
  67                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
  68
  69         graph_name = get_commit_graph_filename(opts.obj_dir);
  70         open_ok = open_commit_graph(graph_name, &fd, &st);
  71         if (!open_ok && errno != ENOENT)
  72                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
  73
  74         FREE_AND_NULL(graph_name);
  75
  76         if (open_ok)
  77                 graph = load_commit_graph_one_fd_st(fd, &st);
  78          else
  79                 graph = read_commit_graph_one(the_repository, opts.obj_dir);
  80
  81         /* Return failure if open_ok predicted success */
  82         if (!graph)
  83                 return !!open_ok;
  84
  85         UNLEAK(graph);
  86         return verify_commit_graph(the_repository, graph, flags);
  87 }
  88
  89 static int graph_read(int argc, const char **argv)
  90 {
  91         struct commit_graph *graph = NULL;
  92         char *graph_name;
  93         int open_ok;
  94         int fd;
  95         struct stat st;
  96
  97         static struct option builtin_commit_graph_read_options[] = {
  98                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  99                         N_("dir"),
 100                         N_("The object directory to store the graph")),
 101                 OPT_END(),
 102         };
 103
 104         argc = parse_options(argc, argv, NULL,
 105                              builtin_commit_graph_read_options,
 106                              builtin_commit_graph_read_usage, 0);
 107
 108         if (!opts.obj_dir)
 109                 opts.obj_dir = get_object_directory();
 110
 111         graph_name = get_commit_graph_filename(opts.obj_dir);
 112
 113         open_ok = open_commit_graph(graph_name, &fd, &st);
 114         if (!open_ok)
 115                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
 116
 117         graph = load_commit_graph_one_fd_st(fd, &st);
 118         if (!graph)
 119                 return 1;
 120
 121         FREE_AND_NULL(graph_name);
 122
 123         printf("header: %08x %d %d %d %d\n",
 124                 ntohl(*(uint32_t*)graph->data),
 125                 *(unsigned char*)(graph->data + 4),
 126                 *(unsigned char*)(graph->data + 5),
 127                 *(unsigned char*)(graph->data + 6),
 128                 *(unsigned char*)(graph->data + 7));
 129         printf("num_commits: %u\n", graph->num_commits);
 130         printf("chunks:");
 131
 132         if (graph->chunk_oid_fanout)
 133                 printf(" oid_fanout");
 134         if (graph->chunk_oid_lookup)
 135                 printf(" oid_lookup");
 136         if (graph->chunk_commit_data)
 137                 printf(" commit_metadata");
 138         if (graph->chunk_extra_edges)
 139                 printf(" extra_edges");
 140         printf("\n");
 141
 142         UNLEAK(graph);
 143
 144         return 0;
 145 }
 146
 147 extern int read_replace_refs;
 148 static struct split_commit_graph_opts split_opts;
 149
 150 static int graph_write(int argc, const char **argv)
 151 {
 152         struct string_list *pack_indexes = NULL;
 153         struct string_list *commit_hex = NULL;
 154         struct string_list lines;
 155         int result = 0;
 156         unsigned int flags = COMMIT_GRAPH_PROGRESS;
 157
 158         static struct option builtin_commit_graph_write_options[] = {
 159                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 160                         N_("dir"),
 161                         N_("The object directory to store the graph")),
 162                 OPT_BOOL(0, "reachable", &opts.reachable,
 163                         N_("start walk at all refs")),
 164                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 165                         N_("scan pack-indexes listed by stdin for commits")),
 166                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 167                         N_("start walk at commits listed by stdin")),
 168                 OPT_BOOL(0, "append", &opts.append,
 169                         N_("include all commits already in the commit-graph file")),
 170                 OPT_BOOL(0, "split", &opts.split,
 171                         N_("allow writing an incremental commit-graph file")),
 172                 OPT_INTEGER(0, "max-commits", &split_opts.max_commits,
 173                         N_("maximum number of commits in a non-base split commit-graph")),
 174                 OPT_INTEGER(0, "size-multiple", &split_opts.size_multiple,
 175                         N_("maximum ratio between two levels of a split commit-graph")),
 176                 OPT_EXPIRY_DATE(0, "expire-time", &split_opts.expire_time,
 177                         N_("maximum number of commits in a non-base split commit-graph")),
 178                 OPT_END(),
 179         };
 180
 181         split_opts.size_multiple = 2;
 182         split_opts.max_commits = 0;
 183         split_opts.expire_time = 0;
 184
 185         argc = parse_options(argc, argv, NULL,
 186                              builtin_commit_graph_write_options,
 187                              builtin_commit_graph_write_usage, 0);
 188
 189         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 190                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 191         if (!opts.obj_dir)
 192                 opts.obj_dir = get_object_directory();
 193         if (opts.append)
 194                 flags |= COMMIT_GRAPH_APPEND;
 195         if (opts.split)
 196                 flags |= COMMIT_GRAPH_SPLIT;
 197
 198         read_replace_refs = 0;
 199
 200         if (opts.reachable) {
 201                 if (write_commit_graph_reachable(opts.obj_dir, flags, &split_opts))
 202                         return 1;
 203                 return 0;
 204         }
 205
 206         string_list_init(&lines, 0);
 207         if (opts.stdin_packs || opts.stdin_commits) {
 208                 struct strbuf buf = STRBUF_INIT;
 209
 210                 while (strbuf_getline(&buf, stdin) != EOF)
 211                         string_list_append(&lines, strbuf_detach(&buf, NULL));
 212
 213                 if (opts.stdin_packs)
 214                         pack_indexes = &lines;
 215                 if (opts.stdin_commits)
 216                         commit_hex = &lines;
 217
 218                 UNLEAK(buf);
 219         }
 220
 221         if (write_commit_graph(opts.obj_dir,
 222                                pack_indexes,
 223                                commit_hex,
 224                                flags,
 225                                &split_opts))
 226                 result = 1;
 227
 228         UNLEAK(lines);
 229         return result;
 230 }
 231
 232 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 233 {
 234         static struct option builtin_commit_graph_options[] = {
 235                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 236                         N_("dir"),
 237                         N_("The object directory to store the graph")),
 238                 OPT_END(),
 239         };
 240
 241         if (argc == 2 && !strcmp(argv[1], "-h"))
 242                 usage_with_options(builtin_commit_graph_usage,
 243                                    builtin_commit_graph_options);
 244
 245         git_config(git_default_config, NULL);
 246         argc = parse_options(argc, argv, prefix,
 247                              builtin_commit_graph_options,
 248                              builtin_commit_graph_usage,
 249                              PARSE_OPT_STOP_AT_NON_OPTION);
 250
 251         if (argc > 0) {
 252                 if (!strcmp(argv[0], "read"))
 253                         return graph_read(argc, argv);
 254                 if (!strcmp(argv[0], "verify"))
 255                         return graph_verify(argc, argv);
 256                 if (!strcmp(argv[0], "write"))
 257                         return graph_write(argc, argv);
 258         }
 259
 260         usage_with_options(builtin_commit_graph_usage,
 261                            builtin_commit_graph_options);
 262 }