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 verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
  12         N_("git commit-graph write [--object-dir <objdir>] [--append] "
  13            "[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] "
  14            "[--[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_write_usage[] = {
  24         N_("git commit-graph write [--object-dir <objdir>] [--append] "
  25            "[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] "
  26            "[--[no-]progress] <split options>"),
  27         NULL
  28 };
  29
  30 static struct opts_commit_graph {
  31         const char *obj_dir;
  32         int reachable;
  33         int stdin_packs;
  34         int stdin_commits;
  35         int append;
  36         int split;
  37         int shallow;
  38         int progress;
  39 } opts;
  40
  41 static struct object_directory *find_odb(struct repository *r,
  42                                          const char *obj_dir)
  43 {
  44         struct object_directory *odb;
  45         char *obj_dir_real = real_pathdup(obj_dir, 1);
  46
  47         prepare_alt_odb(r);
  48         for (odb = r->objects->odb; odb; odb = odb->next) {
  49                 if (!strcmp(obj_dir_real, real_path(odb->path)))
  50                         break;
  51         }
  52
  53         free(obj_dir_real);
  54
  55         if (!odb)
  56                 die(_("could not find object directory matching %s"), obj_dir);
  57         return odb;
  58 }
  59
  60 static int graph_verify(int argc, const char **argv)
  61 {
  62         struct commit_graph *graph = NULL;
  63         struct object_directory *odb = NULL;
  64         char *graph_name;
  65         int open_ok;
  66         int fd;
  67         struct stat st;
  68         int flags = 0;
  69
  70         static struct option builtin_commit_graph_verify_options[] = {
  71                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  72                            N_("dir"),
  73                            N_("The object directory to store the graph")),
  74                 OPT_BOOL(0, "shallow", &opts.shallow,
  75                          N_("if the commit-graph is split, only verify the tip file")),
  76                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
  77                 OPT_END(),
  78         };
  79
  80         trace2_cmd_mode("verify");
  81
  82         opts.progress = isatty(2);
  83         argc = parse_options(argc, argv, NULL,
  84                              builtin_commit_graph_verify_options,
  85                              builtin_commit_graph_verify_usage, 0);
  86
  87         if (!opts.obj_dir)
  88                 opts.obj_dir = get_object_directory();
  89         if (opts.shallow)
  90                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
  91         if (opts.progress)
  92                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
  93
  94         odb = find_odb(the_repository, opts.obj_dir);
  95         graph_name = get_commit_graph_filename(odb);
  96         open_ok = open_commit_graph(graph_name, &fd, &st);
  97         if (!open_ok && errno != ENOENT)
  98                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
  99
 100         FREE_AND_NULL(graph_name);
 101
 102         if (open_ok)
 103                 graph = load_commit_graph_one_fd_st(fd, &st, odb);
 104         else
 105                 graph = read_commit_graph_one(the_repository, odb);
 106
 107         /* Return failure if open_ok predicted success */
 108         if (!graph)
 109                 return !!open_ok;
 110
 111         UNLEAK(graph);
 112         return verify_commit_graph(the_repository, graph, flags);
 113 }
 114
 115 extern int read_replace_refs;
 116 static struct split_commit_graph_opts split_opts;
 117
 118 static int write_option_parse_split(const struct option *opt, const char *arg,
 119                                     int unset)
 120 {
 121         opts.split = 1;
 122         if (!arg)
 123                 return 0;
 124
 125         die(_("unrecognized --split argument, %s"), arg);
 126
 127         return 0;
 128 }
 129
 130 static int graph_write(int argc, const char **argv)
 131 {
 132         struct string_list *pack_indexes = NULL;
 133         struct string_list *commit_hex = NULL;
 134         struct object_directory *odb = NULL;
 135         struct string_list lines;
 136         int result = 0;
 137         enum commit_graph_write_flags flags = 0;
 138
 139         static struct option builtin_commit_graph_write_options[] = {
 140                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 141                         N_("dir"),
 142                         N_("The object directory to store the graph")),
 143                 OPT_BOOL(0, "reachable", &opts.reachable,
 144                         N_("start walk at all refs")),
 145                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 146                         N_("scan pack-indexes listed by stdin for commits")),
 147                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 148                         N_("start walk at commits listed by stdin")),
 149                 OPT_BOOL(0, "append", &opts.append,
 150                         N_("include all commits already in the commit-graph file")),
 151                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
 152                 OPT_CALLBACK_F(0, "split", &split_opts.flags, NULL,
 153                         N_("allow writing an incremental commit-graph file"),
 154                         PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
 155                         write_option_parse_split),
 156                 OPT_INTEGER(0, "max-commits", &split_opts.max_commits,
 157                         N_("maximum number of commits in a non-base split commit-graph")),
 158                 OPT_INTEGER(0, "size-multiple", &split_opts.size_multiple,
 159                         N_("maximum ratio between two levels of a split commit-graph")),
 160                 OPT_EXPIRY_DATE(0, "expire-time", &split_opts.expire_time,
 161                         N_("maximum number of commits in a non-base split commit-graph")),
 162                 OPT_END(),
 163         };
 164
 165         opts.progress = isatty(2);
 166         split_opts.size_multiple = 2;
 167         split_opts.max_commits = 0;
 168         split_opts.expire_time = 0;
 169
 170         trace2_cmd_mode("write");
 171
 172         argc = parse_options(argc, argv, NULL,
 173                              builtin_commit_graph_write_options,
 174                              builtin_commit_graph_write_usage, 0);
 175
 176         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 177                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 178         if (!opts.obj_dir)
 179                 opts.obj_dir = get_object_directory();
 180         if (opts.append)
 181                 flags |= COMMIT_GRAPH_WRITE_APPEND;
 182         if (opts.split)
 183                 flags |= COMMIT_GRAPH_WRITE_SPLIT;
 184         if (opts.progress)
 185                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 186
 187         read_replace_refs = 0;
 188         odb = find_odb(the_repository, opts.obj_dir);
 189
 190         if (opts.reachable) {
 191                 if (write_commit_graph_reachable(odb, flags, &split_opts))
 192                         return 1;
 193                 return 0;
 194         }
 195
 196         string_list_init(&lines, 0);
 197         if (opts.stdin_packs || opts.stdin_commits) {
 198                 struct strbuf buf = STRBUF_INIT;
 199
 200                 while (strbuf_getline(&buf, stdin) != EOF)
 201                         string_list_append(&lines, strbuf_detach(&buf, NULL));
 202
 203                 if (opts.stdin_packs)
 204                         pack_indexes = &lines;
 205                 if (opts.stdin_commits) {
 206                         commit_hex = &lines;
 207                         flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS;
 208                 }
 209
 210                 UNLEAK(buf);
 211         }
 212
 213         if (write_commit_graph(odb,
 214                                pack_indexes,
 215                                commit_hex,
 216                                flags,
 217                                &split_opts))
 218                 result = 1;
 219
 220         UNLEAK(lines);
 221         return result;
 222 }
 223
 224 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 225 {
 226         static struct option builtin_commit_graph_options[] = {
 227                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 228                         N_("dir"),
 229                         N_("The object directory to store the graph")),
 230                 OPT_END(),
 231         };
 232
 233         if (argc == 2 && !strcmp(argv[1], "-h"))
 234                 usage_with_options(builtin_commit_graph_usage,
 235                                    builtin_commit_graph_options);
 236
 237         git_config(git_default_config, NULL);
 238         argc = parse_options(argc, argv, prefix,
 239                              builtin_commit_graph_options,
 240                              builtin_commit_graph_usage,
 241                              PARSE_OPT_STOP_AT_NON_OPTION);
 242
 243         save_commit_buffer = 0;
 244
 245         if (argc > 0) {
 246                 if (!strcmp(argv[0], "verify"))
 247                         return graph_verify(argc, argv);
 248                 if (!strcmp(argv[0], "write"))
 249                         return graph_write(argc, argv);
 250         }
 251
 252         usage_with_options(builtin_commit_graph_usage,
 253                            builtin_commit_graph_options);
 254 }