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