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         trace2_cmd_mode("verify");
  64
  65         opts.progress = isatty(2);
  66         argc = parse_options(argc, argv, NULL,
  67                              builtin_commit_graph_verify_options,
  68                              builtin_commit_graph_verify_usage, 0);
  69
  70         if (!opts.obj_dir)
  71                 opts.obj_dir = get_object_directory();
  72         if (opts.shallow)
  73                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
  74         if (opts.progress)
  75                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
  76
  77         graph_name = get_commit_graph_filename(opts.obj_dir);
  78         open_ok = open_commit_graph(graph_name, &fd, &st);
  79         if (!open_ok && errno != ENOENT)
  80                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
  81
  82         FREE_AND_NULL(graph_name);
  83
  84         if (open_ok)
  85                 graph = load_commit_graph_one_fd_st(fd, &st);
  86          else
  87                 graph = read_commit_graph_one(the_repository, opts.obj_dir);
  88
  89         /* Return failure if open_ok predicted success */
  90         if (!graph)
  91                 return !!open_ok;
  92
  93         UNLEAK(graph);
  94         return verify_commit_graph(the_repository, graph, flags);
  95 }
  96
  97 static int graph_read(int argc, const char **argv)
  98 {
  99         struct commit_graph *graph = NULL;
 100         char *graph_name;
 101         int open_ok;
 102         int fd;
 103         struct stat st;
 104
 105         static struct option builtin_commit_graph_read_options[] = {
 106                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 107                         N_("dir"),
 108                         N_("The object directory to store the graph")),
 109                 OPT_END(),
 110         };
 111
 112         trace2_cmd_mode("read");
 113
 114         argc = parse_options(argc, argv, NULL,
 115                              builtin_commit_graph_read_options,
 116                              builtin_commit_graph_read_usage, 0);
 117
 118         if (!opts.obj_dir)
 119                 opts.obj_dir = get_object_directory();
 120
 121         graph_name = get_commit_graph_filename(opts.obj_dir);
 122
 123         open_ok = open_commit_graph(graph_name, &fd, &st);
 124         if (!open_ok)
 125                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
 126
 127         graph = load_commit_graph_one_fd_st(fd, &st);
 128         if (!graph)
 129                 return 1;
 130
 131         FREE_AND_NULL(graph_name);
 132
 133         printf("header: %08x %d %d %d %d\n",
 134                 ntohl(*(uint32_t*)graph->data),
 135                 *(unsigned char*)(graph->data + 4),
 136                 *(unsigned char*)(graph->data + 5),
 137                 *(unsigned char*)(graph->data + 6),
 138                 *(unsigned char*)(graph->data + 7));
 139         printf("num_commits: %u\n", graph->num_commits);
 140         printf("chunks:");
 141
 142         if (graph->chunk_oid_fanout)
 143                 printf(" oid_fanout");
 144         if (graph->chunk_oid_lookup)
 145                 printf(" oid_lookup");
 146         if (graph->chunk_commit_data)
 147                 printf(" commit_metadata");
 148         if (graph->chunk_extra_edges)
 149                 printf(" extra_edges");
 150         printf("\n");
 151
 152         UNLEAK(graph);
 153
 154         return 0;
 155 }
 156
 157 extern int read_replace_refs;
 158 static struct split_commit_graph_opts split_opts;
 159
 160 static int graph_write(int argc, const char **argv)
 161 {
 162         struct string_list *pack_indexes = NULL;
 163         struct string_list *commit_hex = NULL;
 164         struct string_list lines;
 165         int result = 0;
 166         enum commit_graph_write_flags flags = 0;
 167
 168         static struct option builtin_commit_graph_write_options[] = {
 169                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 170                         N_("dir"),
 171                         N_("The object directory to store the graph")),
 172                 OPT_BOOL(0, "reachable", &opts.reachable,
 173                         N_("start walk at all refs")),
 174                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 175                         N_("scan pack-indexes listed by stdin for commits")),
 176                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 177                         N_("start walk at commits listed by stdin")),
 178                 OPT_BOOL(0, "append", &opts.append,
 179                         N_("include all commits already in the commit-graph file")),
 180                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
 181                 OPT_BOOL(0, "split", &opts.split,
 182                         N_("allow writing an incremental commit-graph file")),
 183                 OPT_INTEGER(0, "max-commits", &split_opts.max_commits,
 184                         N_("maximum number of commits in a non-base split commit-graph")),
 185                 OPT_INTEGER(0, "size-multiple", &split_opts.size_multiple,
 186                         N_("maximum ratio between two levels of a split commit-graph")),
 187                 OPT_EXPIRY_DATE(0, "expire-time", &split_opts.expire_time,
 188                         N_("maximum number of commits in a non-base split commit-graph")),
 189                 OPT_END(),
 190         };
 191
 192         opts.progress = isatty(2);
 193         split_opts.size_multiple = 2;
 194         split_opts.max_commits = 0;
 195         split_opts.expire_time = 0;
 196
 197         trace2_cmd_mode("write");
 198
 199         argc = parse_options(argc, argv, NULL,
 200                              builtin_commit_graph_write_options,
 201                              builtin_commit_graph_write_usage, 0);
 202
 203         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 204                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 205         if (!opts.obj_dir)
 206                 opts.obj_dir = get_object_directory();
 207         if (opts.append)
 208                 flags |= COMMIT_GRAPH_WRITE_APPEND;
 209         if (opts.split)
 210                 flags |= COMMIT_GRAPH_WRITE_SPLIT;
 211         if (opts.progress)
 212                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 213
 214         read_replace_refs = 0;
 215
 216         if (opts.reachable) {
 217                 if (write_commit_graph_reachable(opts.obj_dir, flags, &split_opts))
 218                         return 1;
 219                 return 0;
 220         }
 221
 222         string_list_init(&lines, 0);
 223         if (opts.stdin_packs || opts.stdin_commits) {
 224                 struct strbuf buf = STRBUF_INIT;
 225
 226                 while (strbuf_getline(&buf, stdin) != EOF)
 227                         string_list_append(&lines, strbuf_detach(&buf, NULL));
 228
 229                 if (opts.stdin_packs)
 230                         pack_indexes = &lines;
 231                 if (opts.stdin_commits) {
 232                         commit_hex = &lines;
 233                         flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS;
 234                 }
 235
 236                 UNLEAK(buf);
 237         }
 238
 239         if (write_commit_graph(opts.obj_dir,
 240                                pack_indexes,
 241                                commit_hex,
 242                                flags,
 243                                &split_opts))
 244                 result = 1;
 245
 246         UNLEAK(lines);
 247         return result;
 248 }
 249
 250 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 251 {
 252         static struct option builtin_commit_graph_options[] = {
 253                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 254                         N_("dir"),
 255                         N_("The object directory to store the graph")),
 256                 OPT_END(),
 257         };
 258
 259         if (argc == 2 && !strcmp(argv[1], "-h"))
 260                 usage_with_options(builtin_commit_graph_usage,
 261                                    builtin_commit_graph_options);
 262
 263         git_config(git_default_config, NULL);
 264         argc = parse_options(argc, argv, prefix,
 265                              builtin_commit_graph_options,
 266                              builtin_commit_graph_usage,
 267                              PARSE_OPT_STOP_AT_NON_OPTION);
 268
 269         save_commit_buffer = 0;
 270
 271         if (argc > 0) {
 272                 if (!strcmp(argv[0], "read"))
 273                         return graph_read(argc, argv);
 274                 if (!strcmp(argv[0], "verify"))
 275                         return graph_verify(argc, argv);
 276                 if (!strcmp(argv[0], "write"))
 277                         return graph_write(argc, argv);
 278         }
 279
 280         usage_with_options(builtin_commit_graph_usage,
 281                            builtin_commit_graph_options);
 282 }