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] [--[no-]progress]"),
  14         N_("git commit-graph write [--object-dir <objdir>] [--append|--split] [--reachable|--stdin-packs|--stdin-commits] [--[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_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] [--[no-]progress] <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         int progress;
  42 } opts;
  43
  44 static int graph_verify(int argc, const char **argv)
  45 {
  46         struct commit_graph *graph = NULL;
  47         char *graph_name;
  48         int open_ok;
  49         int fd;
  50         struct stat st;
  51         int flags = 0;
  52
  53         static struct option builtin_commit_graph_verify_options[] = {
  54                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  55                            N_("dir"),
  56                            N_("The object directory to store the graph")),
  57                 OPT_BOOL(0, "shallow", &opts.shallow,
  58                          N_("if the commit-graph is split, only verify the tip file")),
  59                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
  60                 OPT_END(),
  61         };
  62
  63         opts.progress = isatty(2);
  64         argc = parse_options(argc, argv, NULL,
  65                              builtin_commit_graph_verify_options,
  66                              builtin_commit_graph_verify_usage, 0);
  67
  68         if (!opts.obj_dir)
  69                 opts.obj_dir = get_object_directory();
  70         if (opts.shallow)
  71                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
  72         if (opts.progress)
  73                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
  74
  75         graph_name = get_commit_graph_filename(opts.obj_dir);
  76         open_ok = open_commit_graph(graph_name, &fd, &st);
  77         if (!open_ok && errno != ENOENT)
  78                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
  79
  80         FREE_AND_NULL(graph_name);
  81
  82         if (open_ok)
  83                 graph = load_commit_graph_one_fd_st(fd, &st);
  84          else
  85                 graph = read_commit_graph_one(the_repository, opts.obj_dir);
  86
  87         /* Return failure if open_ok predicted success */
  88         if (!graph)
  89                 return !!open_ok;
  90
  91         UNLEAK(graph);
  92         return verify_commit_graph(the_repository, graph, flags);
  93 }
  94
  95 static int graph_read(int argc, const char **argv)
  96 {
  97         struct commit_graph *graph = NULL;
  98         char *graph_name;
  99         int open_ok;
 100         int fd;
 101         struct stat st;
 102
 103         static struct option builtin_commit_graph_read_options[] = {
 104                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 105                         N_("dir"),
 106                         N_("The object directory to store the graph")),
 107                 OPT_END(),
 108         };
 109
 110         argc = parse_options(argc, argv, NULL,
 111                              builtin_commit_graph_read_options,
 112                              builtin_commit_graph_read_usage, 0);
 113
 114         if (!opts.obj_dir)
 115                 opts.obj_dir = get_object_directory();
 116
 117         graph_name = get_commit_graph_filename(opts.obj_dir);
 118
 119         open_ok = open_commit_graph(graph_name, &fd, &st);
 120         if (!open_ok)
 121                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
 122
 123         graph = load_commit_graph_one_fd_st(fd, &st);
 124         if (!graph)
 125                 return 1;
 126
 127         FREE_AND_NULL(graph_name);
 128
 129         printf("header: %08x %d %d %d %d\n",
 130                 ntohl(*(uint32_t*)graph->data),
 131                 *(unsigned char*)(graph->data + 4),
 132                 *(unsigned char*)(graph->data + 5),
 133                 *(unsigned char*)(graph->data + 6),
 134                 *(unsigned char*)(graph->data + 7));
 135         printf("num_commits: %u\n", graph->num_commits);
 136         printf("chunks:");
 137
 138         if (graph->chunk_oid_fanout)
 139                 printf(" oid_fanout");
 140         if (graph->chunk_oid_lookup)
 141                 printf(" oid_lookup");
 142         if (graph->chunk_commit_data)
 143                 printf(" commit_metadata");
 144         if (graph->chunk_extra_edges)
 145                 printf(" extra_edges");
 146         printf("\n");
 147
 148         UNLEAK(graph);
 149
 150         return 0;
 151 }
 152
 153 extern int read_replace_refs;
 154 static struct split_commit_graph_opts split_opts;
 155
 156 static int graph_write(int argc, const char **argv)
 157 {
 158         struct string_list *pack_indexes = NULL;
 159         struct string_list *commit_hex = NULL;
 160         struct string_list lines;
 161         int result = 0;
 162         enum commit_graph_write_flags flags = 0;
 163
 164         static struct option builtin_commit_graph_write_options[] = {
 165                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 166                         N_("dir"),
 167                         N_("The object directory to store the graph")),
 168                 OPT_BOOL(0, "reachable", &opts.reachable,
 169                         N_("start walk at all refs")),
 170                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 171                         N_("scan pack-indexes listed by stdin for commits")),
 172                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 173                         N_("start walk at commits listed by stdin")),
 174                 OPT_BOOL(0, "append", &opts.append,
 175                         N_("include all commits already in the commit-graph file")),
 176                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
 177                 OPT_BOOL(0, "split", &opts.split,
 178                         N_("allow writing an incremental commit-graph file")),
 179                 OPT_INTEGER(0, "max-commits", &split_opts.max_commits,
 180                         N_("maximum number of commits in a non-base split commit-graph")),
 181                 OPT_INTEGER(0, "size-multiple", &split_opts.size_multiple,
 182                         N_("maximum ratio between two levels of a split commit-graph")),
 183                 OPT_EXPIRY_DATE(0, "expire-time", &split_opts.expire_time,
 184                         N_("maximum number of commits in a non-base split commit-graph")),
 185                 OPT_END(),
 186         };
 187
 188         opts.progress = isatty(2);
 189         split_opts.size_multiple = 2;
 190         split_opts.max_commits = 0;
 191         split_opts.expire_time = 0;
 192
 193         argc = parse_options(argc, argv, NULL,
 194                              builtin_commit_graph_write_options,
 195                              builtin_commit_graph_write_usage, 0);
 196
 197         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 198                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 199         if (!opts.obj_dir)
 200                 opts.obj_dir = get_object_directory();
 201         if (opts.append)
 202                 flags |= COMMIT_GRAPH_WRITE_APPEND;
 203         if (opts.split)
 204                 flags |= COMMIT_GRAPH_WRITE_SPLIT;
 205         if (opts.progress)
 206                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 207
 208         read_replace_refs = 0;
 209
 210         if (opts.reachable) {
 211                 if (write_commit_graph_reachable(opts.obj_dir, flags, &split_opts))
 212                         return 1;
 213                 return 0;
 214         }
 215
 216         string_list_init(&lines, 0);
 217         if (opts.stdin_packs || opts.stdin_commits) {
 218                 struct strbuf buf = STRBUF_INIT;
 219
 220                 while (strbuf_getline(&buf, stdin) != EOF)
 221                         string_list_append(&lines, strbuf_detach(&buf, NULL));
 222
 223                 if (opts.stdin_packs)
 224                         pack_indexes = &lines;
 225                 if (opts.stdin_commits) {
 226                         commit_hex = &lines;
 227                         flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS;
 228                 }
 229
 230                 UNLEAK(buf);
 231         }
 232
 233         if (write_commit_graph(opts.obj_dir,
 234                                pack_indexes,
 235                                commit_hex,
 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], "read"))
 267                         return graph_read(argc, argv);
 268                 if (!strcmp(argv[0], "verify"))
 269                         return graph_verify(argc, argv);
 270                 if (!strcmp(argv[0], "write"))
 271                         return graph_write(argc, argv);
 272         }
 273
 274         usage_with_options(builtin_commit_graph_usage,
 275                            builtin_commit_graph_options);
 276 }