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