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 "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] [--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] [--stdin-packs|--stdin-commits]"),
  29         NULL
  30 };
  31
  32 static struct opts_commit_graph {
  33         const char *obj_dir;
  34         int stdin_packs;
  35         int stdin_commits;
  36         int append;
  37 } opts;
  38
  39
  40 static int graph_verify(int argc, const char **argv)
  41 {
  42         struct commit_graph *graph = NULL;
  43         char *graph_name;
  44
  45         static struct option builtin_commit_graph_verify_options[] = {
  46                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  47                            N_("dir"),
  48                            N_("The object directory to store the graph")),
  49                 OPT_END(),
  50         };
  51
  52         argc = parse_options(argc, argv, NULL,
  53                              builtin_commit_graph_verify_options,
  54                              builtin_commit_graph_verify_usage, 0);
  55
  56         if (!opts.obj_dir)
  57                 opts.obj_dir = get_object_directory();
  58
  59         graph_name = get_commit_graph_filename(opts.obj_dir);
  60         graph = load_commit_graph_one(graph_name);
  61         FREE_AND_NULL(graph_name);
  62
  63         if (!graph)
  64                 return 0;
  65
  66         return verify_commit_graph(the_repository, graph);
  67 }
  68
  69 static int graph_read(int argc, const char **argv)
  70 {
  71         struct commit_graph *graph = NULL;
  72         char *graph_name;
  73
  74         static struct option builtin_commit_graph_read_options[] = {
  75                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  76                         N_("dir"),
  77                         N_("The object directory to store the graph")),
  78                 OPT_END(),
  79         };
  80
  81         argc = parse_options(argc, argv, NULL,
  82                              builtin_commit_graph_read_options,
  83                              builtin_commit_graph_read_usage, 0);
  84
  85         if (!opts.obj_dir)
  86                 opts.obj_dir = get_object_directory();
  87
  88         graph_name = get_commit_graph_filename(opts.obj_dir);
  89         graph = load_commit_graph_one(graph_name);
  90
  91         if (!graph) {
  92                 UNLEAK(graph_name);
  93                 die("graph file %s does not exist", graph_name);
  94         }
  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         return 0;
 118 }
 119
 120 static int graph_write(int argc, const char **argv)
 121 {
 122         const char **pack_indexes = NULL;
 123         int packs_nr = 0;
 124         const char **commit_hex = NULL;
 125         int commits_nr = 0;
 126         const char **lines = NULL;
 127         int lines_nr = 0;
 128         int lines_alloc = 0;
 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, "stdin-packs", &opts.stdin_packs,
 135                         N_("scan pack-indexes listed by stdin for commits")),
 136                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 137                         N_("start walk at commits listed by stdin")),
 138                 OPT_BOOL(0, "append", &opts.append,
 139                         N_("include all commits already in the commit-graph file")),
 140                 OPT_END(),
 141         };
 142
 143         argc = parse_options(argc, argv, NULL,
 144                              builtin_commit_graph_write_options,
 145                              builtin_commit_graph_write_usage, 0);
 146
 147         if (opts.stdin_packs && opts.stdin_commits)
 148                 die(_("cannot use both --stdin-commits and --stdin-packs"));
 149         if (!opts.obj_dir)
 150                 opts.obj_dir = get_object_directory();
 151
 152         if (opts.stdin_packs || opts.stdin_commits) {
 153                 struct strbuf buf = STRBUF_INIT;
 154                 lines_nr = 0;
 155                 lines_alloc = 128;
 156                 ALLOC_ARRAY(lines, lines_alloc);
 157
 158                 while (strbuf_getline(&buf, stdin) != EOF) {
 159                         ALLOC_GROW(lines, lines_nr + 1, lines_alloc);
 160                         lines[lines_nr++] = strbuf_detach(&buf, NULL);
 161                 }
 162
 163                 if (opts.stdin_packs) {
 164                         pack_indexes = lines;
 165                         packs_nr = lines_nr;
 166                 }
 167                 if (opts.stdin_commits) {
 168                         commit_hex = lines;
 169                         commits_nr = lines_nr;
 170                 }
 171         }
 172
 173         write_commit_graph(opts.obj_dir,
 174                            pack_indexes,
 175                            packs_nr,
 176                            commit_hex,
 177                            commits_nr,
 178                            opts.append);
 179
 180         return 0;
 181 }
 182
 183 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 184 {
 185         static struct option builtin_commit_graph_options[] = {
 186                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 187                         N_("dir"),
 188                         N_("The object directory to store the graph")),
 189                 OPT_END(),
 190         };
 191
 192         if (argc == 2 && !strcmp(argv[1], "-h"))
 193                 usage_with_options(builtin_commit_graph_usage,
 194                                    builtin_commit_graph_options);
 195
 196         git_config(git_default_config, NULL);
 197         argc = parse_options(argc, argv, prefix,
 198                              builtin_commit_graph_options,
 199                              builtin_commit_graph_usage,
 200                              PARSE_OPT_STOP_AT_NON_OPTION);
 201
 202         if (argc > 0) {
 203                 if (!strcmp(argv[0], "read"))
 204                         return graph_read(argc, argv);
 205                 if (!strcmp(argv[0], "verify"))
 206                         return graph_verify(argc, argv);
 207                 if (!strcmp(argv[0], "write"))
 208                         return graph_write(argc, argv);
 209         }
 210
 211         usage_with_options(builtin_commit_graph_usage,
 212                            builtin_commit_graph_options);
 213 }