git.oblomov.eu Git - git/blob - 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 "commit-graph.h"
   7
   8 static char const * const builtin_commit_graph_usage[] = {
   9         N_("git commit-graph [--object-dir <objdir>]"),
  10         N_("git commit-graph read [--object-dir <objdir>]"),
  11         N_("git commit-graph write [--object-dir <objdir>] [--append] [--stdin-packs|--stdin-commits]"),
  12         NULL
  13 };
  14
  15 static const char * const builtin_commit_graph_read_usage[] = {
  16         N_("git commit-graph read [--object-dir <objdir>]"),
  17         NULL
  18 };
  19
  20 static const char * const builtin_commit_graph_write_usage[] = {
  21         N_("git commit-graph write [--object-dir <objdir>] [--append] [--stdin-packs|--stdin-commits]"),
  22         NULL
  23 };
  24
  25 static struct opts_commit_graph {
  26         const char *obj_dir;
  27         int stdin_packs;
  28         int stdin_commits;
  29         int append;
  30 } opts;
  31
  32 static int graph_read(int argc, const char **argv)
  33 {
  34         struct commit_graph *graph = NULL;
  35         char *graph_name;
  36
  37         static struct option builtin_commit_graph_read_options[] = {
  38                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  39                         N_("dir"),
  40                         N_("The object directory to store the graph")),
  41                 OPT_END(),
  42         };
  43
  44         argc = parse_options(argc, argv, NULL,
  45                              builtin_commit_graph_read_options,
  46                              builtin_commit_graph_read_usage, 0);
  47
  48         if (!opts.obj_dir)
  49                 opts.obj_dir = get_object_directory();
  50
  51         graph_name = get_commit_graph_filename(opts.obj_dir);
  52         graph = load_commit_graph_one(graph_name);
  53
  54         if (!graph) {
  55                 UNLEAK(graph_name);
  56                 die("graph file %s does not exist", graph_name);
  57         }
  58
  59         FREE_AND_NULL(graph_name);
  60
  61         printf("header: %08x %d %d %d %d\n",
  62                 ntohl(*(uint32_t*)graph->data),
  63                 *(unsigned char*)(graph->data + 4),
  64                 *(unsigned char*)(graph->data + 5),
  65                 *(unsigned char*)(graph->data + 6),
  66                 *(unsigned char*)(graph->data + 7));
  67         printf("num_commits: %u\n", graph->num_commits);
  68         printf("chunks:");
  69
  70         if (graph->chunk_oid_fanout)
  71                 printf(" oid_fanout");
  72         if (graph->chunk_oid_lookup)
  73                 printf(" oid_lookup");
  74         if (graph->chunk_commit_data)
  75                 printf(" commit_metadata");
  76         if (graph->chunk_large_edges)
  77                 printf(" large_edges");
  78         printf("\n");
  79
  80         return 0;
  81 }
  82
  83 static int graph_write(int argc, const char **argv)
  84 {
  85         const char **pack_indexes = NULL;
  86         int packs_nr = 0;
  87         const char **commit_hex = NULL;
  88         int commits_nr = 0;
  89         const char **lines = NULL;
  90         int lines_nr = 0;
  91         int lines_alloc = 0;
  92
  93         static struct option builtin_commit_graph_write_options[] = {
  94                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  95                         N_("dir"),
  96                         N_("The object directory to store the graph")),
  97                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
  98                         N_("scan pack-indexes listed by stdin for commits")),
  99                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 100                         N_("start walk at commits listed by stdin")),
 101                 OPT_BOOL(0, "append", &opts.append,
 102                         N_("include all commits already in the commit-graph file")),
 103                 OPT_END(),
 104         };
 105
 106         argc = parse_options(argc, argv, NULL,
 107                              builtin_commit_graph_write_options,
 108                              builtin_commit_graph_write_usage, 0);
 109
 110         if (opts.stdin_packs && opts.stdin_commits)
 111                 die(_("cannot use both --stdin-commits and --stdin-packs"));
 112         if (!opts.obj_dir)
 113                 opts.obj_dir = get_object_directory();
 114
 115         if (opts.stdin_packs || opts.stdin_commits) {
 116                 struct strbuf buf = STRBUF_INIT;
 117                 lines_nr = 0;
 118                 lines_alloc = 128;
 119                 ALLOC_ARRAY(lines, lines_alloc);
 120
 121                 while (strbuf_getline(&buf, stdin) != EOF) {
 122                         ALLOC_GROW(lines, lines_nr + 1, lines_alloc);
 123                         lines[lines_nr++] = strbuf_detach(&buf, NULL);
 124                 }
 125
 126                 if (opts.stdin_packs) {
 127                         pack_indexes = lines;
 128                         packs_nr = lines_nr;
 129                 }
 130                 if (opts.stdin_commits) {
 131                         commit_hex = lines;
 132                         commits_nr = lines_nr;
 133                 }
 134         }
 135
 136         write_commit_graph(opts.obj_dir,
 137                            pack_indexes,
 138                            packs_nr,
 139                            commit_hex,
 140                            commits_nr,
 141                            opts.append);
 142
 143         return 0;
 144 }
 145
 146 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 147 {
 148         static struct option builtin_commit_graph_options[] = {
 149                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 150                         N_("dir"),
 151                         N_("The object directory to store the graph")),
 152                 OPT_END(),
 153         };
 154
 155         if (argc == 2 && !strcmp(argv[1], "-h"))
 156                 usage_with_options(builtin_commit_graph_usage,
 157                                    builtin_commit_graph_options);
 158
 159         git_config(git_default_config, NULL);
 160         argc = parse_options(argc, argv, prefix,
 161                              builtin_commit_graph_options,
 162                              builtin_commit_graph_usage,
 163                              PARSE_OPT_STOP_AT_NON_OPTION);
 164
 165         if (argc > 0) {
 166                 if (!strcmp(argv[0], "read"))
 167                         return graph_read(argc, argv);
 168                 if (!strcmp(argv[0], "write"))
 169                         return graph_write(argc, argv);
 170         }
 171
 172         usage_with_options(builtin_commit_graph_usage,
 173                            builtin_commit_graph_options);
 174 }