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] [--[no-]progress]"),
  13         N_("git commit-graph write [--object-dir <objdir>] [--append|--split] [--reachable|--stdin-packs|--stdin-commits] [--[no-]progress] <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] [--[no-]progress]"),
  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] [--[no-]progress] <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         int progress;
  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_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
  59                 OPT_END(),
  60         };
  61
  62         trace2_cmd_mode("verify");
  63
  64         opts.progress = isatty(2);
  65         argc = parse_options(argc, argv, NULL,
  66                              builtin_commit_graph_verify_options,
  67                              builtin_commit_graph_verify_usage, 0);
  68
  69         if (!opts.obj_dir)
  70                 opts.obj_dir = get_object_directory();
  71         if (opts.shallow)
  72                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
  73         if (opts.progress)
  74                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
  75
  76         graph_name = get_commit_graph_filename(opts.obj_dir);
  77         open_ok = open_commit_graph(graph_name, &fd, &st);
  78         if (!open_ok && errno != ENOENT)
  79                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
  80
  81         FREE_AND_NULL(graph_name);
  82
  83         if (open_ok)
  84                 graph = load_commit_graph_one_fd_st(fd, &st);
  85          else
  86                 graph = read_commit_graph_one(the_repository, opts.obj_dir);
  87
  88         /* Return failure if open_ok predicted success */
  89         if (!graph)
  90                 return !!open_ok;
  91
  92         UNLEAK(graph);
  93         return verify_commit_graph(the_repository, graph, flags);
  94 }
  95
  96 static int graph_read(int argc, const char **argv)
  97 {
  98         struct commit_graph *graph = NULL;
  99         char *graph_name;
 100         int open_ok;
 101         int fd;
 102         struct stat st;
 103
 104         static struct option builtin_commit_graph_read_options[] = {
 105                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 106                         N_("dir"),
 107                         N_("The object directory to store the graph")),
 108                 OPT_END(),
 109         };
 110
 111         trace2_cmd_mode("read");
 112
 113         argc = parse_options(argc, argv, NULL,
 114                              builtin_commit_graph_read_options,
 115                              builtin_commit_graph_read_usage, 0);
 116
 117         if (!opts.obj_dir)
 118                 opts.obj_dir = get_object_directory();
 119
 120         graph_name = get_commit_graph_filename(opts.obj_dir);
 121
 122         open_ok = open_commit_graph(graph_name, &fd, &st);
 123         if (!open_ok)
 124                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
 125
 126         graph = load_commit_graph_one_fd_st(fd, &st);
 127         if (!graph)
 128                 return 1;
 129
 130         FREE_AND_NULL(graph_name);
 131
 132         printf("header: %08x %d %d %d %d\n",
 133                 ntohl(*(uint32_t*)graph->data),
 134                 *(unsigned char*)(graph->data + 4),
 135                 *(unsigned char*)(graph->data + 5),
 136                 *(unsigned char*)(graph->data + 6),
 137                 *(unsigned char*)(graph->data + 7));
 138         printf("num_commits: %u\n", graph->num_commits);
 139         printf("chunks:");
 140
 141         if (graph->chunk_oid_fanout)
 142                 printf(" oid_fanout");
 143         if (graph->chunk_oid_lookup)
 144                 printf(" oid_lookup");
 145         if (graph->chunk_commit_data)
 146                 printf(" commit_metadata");
 147         if (graph->chunk_extra_edges)
 148                 printf(" extra_edges");
 149         printf("\n");
 150
 151         UNLEAK(graph);
 152
 153         return 0;
 154 }
 155
 156 extern int read_replace_refs;
 157 static struct split_commit_graph_opts split_opts;
 158
 159 static int graph_write(int argc, const char **argv)
 160 {
 161         struct string_list *pack_indexes = NULL;
 162         struct string_list *commit_hex = NULL;
 163         struct string_list lines;
 164         int result = 0;
 165         enum commit_graph_write_flags flags = 0;
 166
 167         static struct option builtin_commit_graph_write_options[] = {
 168                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 169                         N_("dir"),
 170                         N_("The object directory to store the graph")),
 171                 OPT_BOOL(0, "reachable", &opts.reachable,
 172                         N_("start walk at all refs")),
 173                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 174                         N_("scan pack-indexes listed by stdin for commits")),
 175                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 176                         N_("start walk at commits listed by stdin")),
 177                 OPT_BOOL(0, "append", &opts.append,
 178                         N_("include all commits already in the commit-graph file")),
 179                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
 180                 OPT_BOOL(0, "split", &opts.split,
 181                         N_("allow writing an incremental commit-graph file")),
 182                 OPT_INTEGER(0, "max-commits", &split_opts.max_commits,
 183                         N_("maximum number of commits in a non-base split commit-graph")),
 184                 OPT_INTEGER(0, "size-multiple", &split_opts.size_multiple,
 185                         N_("maximum ratio between two levels of a split commit-graph")),
 186                 OPT_EXPIRY_DATE(0, "expire-time", &split_opts.expire_time,
 187                         N_("maximum number of commits in a non-base split commit-graph")),
 188                 OPT_END(),
 189         };
 190
 191         opts.progress = isatty(2);
 192         split_opts.size_multiple = 2;
 193         split_opts.max_commits = 0;
 194         split_opts.expire_time = 0;
 195
 196         trace2_cmd_mode("write");
 197
 198         argc = parse_options(argc, argv, NULL,
 199                              builtin_commit_graph_write_options,
 200                              builtin_commit_graph_write_usage, 0);
 201
 202         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 203                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 204         if (!opts.obj_dir)
 205                 opts.obj_dir = get_object_directory();
 206         if (opts.append)
 207                 flags |= COMMIT_GRAPH_WRITE_APPEND;
 208         if (opts.split)
 209                 flags |= COMMIT_GRAPH_WRITE_SPLIT;
 210         if (opts.progress)
 211                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 212
 213         read_replace_refs = 0;
 214
 215         if (opts.reachable) {
 216                 if (write_commit_graph_reachable(opts.obj_dir, flags, &split_opts))
 217                         return 1;
 218                 return 0;
 219         }
 220
 221         string_list_init(&lines, 0);
 222         if (opts.stdin_packs || opts.stdin_commits) {
 223                 struct strbuf buf = STRBUF_INIT;
 224
 225                 while (strbuf_getline(&buf, stdin) != EOF)
 226                         string_list_append(&lines, strbuf_detach(&buf, NULL));
 227
 228                 if (opts.stdin_packs)
 229                         pack_indexes = &lines;
 230                 if (opts.stdin_commits) {
 231                         commit_hex = &lines;
 232                         flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS;
 233                 }
 234
 235                 UNLEAK(buf);
 236         }
 237
 238         if (write_commit_graph(opts.obj_dir,
 239                                pack_indexes,
 240                                commit_hex,
 241                                flags,
 242                                &split_opts))
 243                 result = 1;
 244
 245         UNLEAK(lines);
 246         return result;
 247 }
 248
 249 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 250 {
 251         static struct option builtin_commit_graph_options[] = {
 252                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 253                         N_("dir"),
 254                         N_("The object directory to store the graph")),
 255                 OPT_END(),
 256         };
 257
 258         if (argc == 2 && !strcmp(argv[1], "-h"))
 259                 usage_with_options(builtin_commit_graph_usage,
 260                                    builtin_commit_graph_options);
 261
 262         git_config(git_default_config, NULL);
 263         argc = parse_options(argc, argv, prefix,
 264                              builtin_commit_graph_options,
 265                              builtin_commit_graph_usage,
 266                              PARSE_OPT_STOP_AT_NON_OPTION);
 267
 268         save_commit_buffer = 0;
 269
 270         if (argc > 0) {
 271                 if (!strcmp(argv[0], "read"))
 272                         return graph_read(argc, argv);
 273                 if (!strcmp(argv[0], "verify"))
 274                         return graph_verify(argc, argv);
 275                 if (!strcmp(argv[0], "write"))
 276                         return graph_write(argc, argv);
 277         }
 278
 279         usage_with_options(builtin_commit_graph_usage,
 280                            builtin_commit_graph_options);
 281 }