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