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
   9 static char const * const builtin_commit_graph_usage[] = {
  10         N_("git commit-graph [--object-dir <objdir>]"),
  11         N_("git commit-graph read [--object-dir <objdir>]"),
  12         N_("git commit-graph verify [--object-dir <objdir>]"),
  13         N_("git commit-graph write [--object-dir <objdir>] [--append] [--reachable|--stdin-packs|--stdin-commits]"),
  14         NULL
  15 };
  16
  17 static const char * const builtin_commit_graph_verify_usage[] = {
  18         N_("git commit-graph verify [--object-dir <objdir>]"),
  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] [--reachable|--stdin-packs|--stdin-commits]"),
  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 } opts;
  39
  40
  41 static int graph_verify(int argc, const char **argv)
  42 {
  43         struct commit_graph *graph = NULL;
  44         char *graph_name;
  45         int open_ok;
  46         int fd;
  47         struct stat st;
  48
  49         static struct option builtin_commit_graph_verify_options[] = {
  50                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  51                            N_("dir"),
  52                            N_("The object directory to store the graph")),
  53                 OPT_END(),
  54         };
  55
  56         argc = parse_options(argc, argv, NULL,
  57                              builtin_commit_graph_verify_options,
  58                              builtin_commit_graph_verify_usage, 0);
  59
  60         if (!opts.obj_dir)
  61                 opts.obj_dir = get_object_directory();
  62
  63         graph_name = get_commit_graph_filename(opts.obj_dir);
  64         open_ok = open_commit_graph(graph_name, &fd, &st);
  65         if (!open_ok)
  66                 return 0;
  67         graph = load_commit_graph_one_fd_st(fd, &st);
  68         FREE_AND_NULL(graph_name);
  69
  70         if (!graph)
  71                 return 1;
  72
  73         UNLEAK(graph);
  74         return verify_commit_graph(the_repository, graph);
  75 }
  76
  77 static int graph_read(int argc, const char **argv)
  78 {
  79         struct commit_graph *graph = NULL;
  80         char *graph_name;
  81         int open_ok;
  82         int fd;
  83         struct stat st;
  84
  85         static struct option builtin_commit_graph_read_options[] = {
  86                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  87                         N_("dir"),
  88                         N_("The object directory to store the graph")),
  89                 OPT_END(),
  90         };
  91
  92         argc = parse_options(argc, argv, NULL,
  93                              builtin_commit_graph_read_options,
  94                              builtin_commit_graph_read_usage, 0);
  95
  96         if (!opts.obj_dir)
  97                 opts.obj_dir = get_object_directory();
  98
  99         graph_name = get_commit_graph_filename(opts.obj_dir);
 100
 101         open_ok = open_commit_graph(graph_name, &fd, &st);
 102         if (!open_ok)
 103                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
 104
 105         graph = load_commit_graph_one_fd_st(fd, &st);
 106         if (!graph)
 107                 return 1;
 108
 109         FREE_AND_NULL(graph_name);
 110
 111         printf("header: %08x %d %d %d %d\n",
 112                 ntohl(*(uint32_t*)graph->data),
 113                 *(unsigned char*)(graph->data + 4),
 114                 *(unsigned char*)(graph->data + 5),
 115                 *(unsigned char*)(graph->data + 6),
 116                 *(unsigned char*)(graph->data + 7));
 117         printf("num_commits: %u\n", graph->num_commits);
 118         printf("chunks:");
 119
 120         if (graph->chunk_oid_fanout)
 121                 printf(" oid_fanout");
 122         if (graph->chunk_oid_lookup)
 123                 printf(" oid_lookup");
 124         if (graph->chunk_commit_data)
 125                 printf(" commit_metadata");
 126         if (graph->chunk_extra_edges)
 127                 printf(" extra_edges");
 128         printf("\n");
 129
 130         UNLEAK(graph);
 131
 132         return 0;
 133 }
 134
 135 extern int read_replace_refs;
 136
 137 static int graph_write(int argc, const char **argv)
 138 {
 139         struct string_list *pack_indexes = NULL;
 140         struct string_list *commit_hex = NULL;
 141         struct string_list lines;
 142
 143         static struct option builtin_commit_graph_write_options[] = {
 144                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 145                         N_("dir"),
 146                         N_("The object directory to store the graph")),
 147                 OPT_BOOL(0, "reachable", &opts.reachable,
 148                         N_("start walk at all refs")),
 149                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 150                         N_("scan pack-indexes listed by stdin for commits")),
 151                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 152                         N_("start walk at commits listed by stdin")),
 153                 OPT_BOOL(0, "append", &opts.append,
 154                         N_("include all commits already in the commit-graph file")),
 155                 OPT_END(),
 156         };
 157
 158         argc = parse_options(argc, argv, NULL,
 159                              builtin_commit_graph_write_options,
 160                              builtin_commit_graph_write_usage, 0);
 161
 162         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 163                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 164         if (!opts.obj_dir)
 165                 opts.obj_dir = get_object_directory();
 166
 167         read_replace_refs = 0;
 168
 169         if (opts.reachable) {
 170                 write_commit_graph_reachable(opts.obj_dir, opts.append, 1);
 171                 return 0;
 172         }
 173
 174         string_list_init(&lines, 0);
 175         if (opts.stdin_packs || opts.stdin_commits) {
 176                 struct strbuf buf = STRBUF_INIT;
 177
 178                 while (strbuf_getline(&buf, stdin) != EOF)
 179                         string_list_append(&lines, strbuf_detach(&buf, NULL));
 180
 181                 if (opts.stdin_packs)
 182                         pack_indexes = &lines;
 183                 if (opts.stdin_commits)
 184                         commit_hex = &lines;
 185
 186                 UNLEAK(buf);
 187         }
 188
 189         write_commit_graph(opts.obj_dir,
 190                            pack_indexes,
 191                            commit_hex,
 192                            opts.append,
 193                            1);
 194
 195         UNLEAK(lines);
 196         return 0;
 197 }
 198
 199 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 200 {
 201         static struct option builtin_commit_graph_options[] = {
 202                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 203                         N_("dir"),
 204                         N_("The object directory to store the graph")),
 205                 OPT_END(),
 206         };
 207
 208         if (argc == 2 && !strcmp(argv[1], "-h"))
 209                 usage_with_options(builtin_commit_graph_usage,
 210                                    builtin_commit_graph_options);
 211
 212         git_config(git_default_config, NULL);
 213         argc = parse_options(argc, argv, prefix,
 214                              builtin_commit_graph_options,
 215                              builtin_commit_graph_usage,
 216                              PARSE_OPT_STOP_AT_NON_OPTION);
 217
 218         if (argc > 0) {
 219                 if (!strcmp(argv[0], "read"))
 220                         return graph_read(argc, argv);
 221                 if (!strcmp(argv[0], "verify"))
 222                         return graph_verify(argc, argv);
 223                 if (!strcmp(argv[0], "write"))
 224                         return graph_write(argc, argv);
 225         }
 226
 227         usage_with_options(builtin_commit_graph_usage,
 228                            builtin_commit_graph_options);
 229 }