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