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                 die("graph file %s does not exist", graph_name);
  56         FREE_AND_NULL(graph_name);
  57
  58         printf("header: %08x %d %d %d %d\n",
  59                 ntohl(*(uint32_t*)graph->data),
  60                 *(unsigned char*)(graph->data + 4),
  61                 *(unsigned char*)(graph->data + 5),
  62                 *(unsigned char*)(graph->data + 6),
  63                 *(unsigned char*)(graph->data + 7));
  64         printf("num_commits: %u\n", graph->num_commits);
  65         printf("chunks:");
  66
  67         if (graph->chunk_oid_fanout)
  68                 printf(" oid_fanout");
  69         if (graph->chunk_oid_lookup)
  70                 printf(" oid_lookup");
  71         if (graph->chunk_commit_data)
  72                 printf(" commit_metadata");
  73         if (graph->chunk_large_edges)
  74                 printf(" large_edges");
  75         printf("\n");
  76
  77         return 0;
  78 }
  79
  80 static int graph_write(int argc, const char **argv)
  81 {
  82         const char **pack_indexes = NULL;
  83         int packs_nr = 0;
  84         const char **commit_hex = NULL;
  85         int commits_nr = 0;
  86         const char **lines = NULL;
  87         int lines_nr = 0;
  88         int lines_alloc = 0;
  89
  90         static struct option builtin_commit_graph_write_options[] = {
  91                 OPT_STRING(0, "object-dir", &opts.obj_dir,
  92                         N_("dir"),
  93                         N_("The object directory to store the graph")),
  94                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
  95                         N_("scan pack-indexes listed by stdin for commits")),
  96                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
  97                         N_("start walk at commits listed by stdin")),
  98                 OPT_BOOL(0, "append", &opts.append,
  99                         N_("include all commits already in the commit-graph file")),
 100                 OPT_END(),
 101         };
 102
 103         argc = parse_options(argc, argv, NULL,
 104                              builtin_commit_graph_write_options,
 105                              builtin_commit_graph_write_usage, 0);
 106
 107         if (opts.stdin_packs && opts.stdin_commits)
 108                 die(_("cannot use both --stdin-commits and --stdin-packs"));
 109         if (!opts.obj_dir)
 110                 opts.obj_dir = get_object_directory();
 111
 112         if (opts.stdin_packs || opts.stdin_commits) {
 113                 struct strbuf buf = STRBUF_INIT;
 114                 lines_nr = 0;
 115                 lines_alloc = 128;
 116                 ALLOC_ARRAY(lines, lines_alloc);
 117
 118                 while (strbuf_getline(&buf, stdin) != EOF) {
 119                         ALLOC_GROW(lines, lines_nr + 1, lines_alloc);
 120                         lines[lines_nr++] = strbuf_detach(&buf, NULL);
 121                 }
 122
 123                 if (opts.stdin_packs) {
 124                         pack_indexes = lines;
 125                         packs_nr = lines_nr;
 126                 }
 127                 if (opts.stdin_commits) {
 128                         commit_hex = lines;
 129                         commits_nr = lines_nr;
 130                 }
 131         }
 132
 133         write_commit_graph(opts.obj_dir,
 134                            pack_indexes,
 135                            packs_nr,
 136                            commit_hex,
 137                            commits_nr,
 138                            opts.append);
 139
 140         return 0;
 141 }
 142
 143 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 144 {
 145         static struct option builtin_commit_graph_options[] = {
 146                 OPT_STRING(0, "object-dir", &opts.obj_dir,
 147                         N_("dir"),
 148                         N_("The object directory to store the graph")),
 149                 OPT_END(),
 150         };
 151
 152         if (argc == 2 && !strcmp(argv[1], "-h"))
 153                 usage_with_options(builtin_commit_graph_usage,
 154                                    builtin_commit_graph_options);
 155
 156         git_config(git_default_config, NULL);
 157         argc = parse_options(argc, argv, prefix,
 158                              builtin_commit_graph_options,
 159                              builtin_commit_graph_usage,
 160                              PARSE_OPT_STOP_AT_NON_OPTION);
 161
 162         if (argc > 0) {
 163                 if (!strcmp(argv[0], "read"))
 164                         return graph_read(argc, argv);
 165                 if (!strcmp(argv[0], "write"))
 166                         return graph_write(argc, argv);
 167         }
 168
 169         usage_with_options(builtin_commit_graph_usage,
 170                            builtin_commit_graph_options);
 171 }