Andrew's git - gitweb.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
   9static 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
  17static const char * const builtin_commit_graph_verify_usage[] = {
  18        N_("git commit-graph verify [--object-dir <objdir>]"),
  19        NULL
  20};
  21
  22static const char * const builtin_commit_graph_read_usage[] = {
  23        N_("git commit-graph read [--object-dir <objdir>]"),
  24        NULL
  25};
  26
  27static 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
  32static 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
  41static int graph_verify(int argc, const char **argv)
  42{
  43        struct commit_graph *graph = NULL;
  44        char *graph_name;
  45        int open_ok;
  46        int fd;
  47        struct stat st;
  48
  49        static struct option builtin_commit_graph_verify_options[] = {
  50                OPT_STRING(0, "object-dir", &opts.obj_dir,
  51                           N_("dir"),
  52                           N_("The object directory to store the graph")),
  53                OPT_END(),
  54        };
  55
  56        argc = parse_options(argc, argv, NULL,
  57                             builtin_commit_graph_verify_options,
  58                             builtin_commit_graph_verify_usage, 0);
  59
  60        if (!opts.obj_dir)
  61                opts.obj_dir = get_object_directory();
  62
  63        graph_name = get_commit_graph_filename(opts.obj_dir);
  64        open_ok = open_commit_graph(graph_name, &fd, &st);
  65        if (!open_ok && errno == ENOENT)
  66                return 0;
  67        if (!open_ok)
  68                die_errno(_("Could not open commit-graph '%s'"), graph_name);
  69        graph = load_commit_graph_one_fd_st(fd, &st);
  70        FREE_AND_NULL(graph_name);
  71
  72        if (!graph)
  73                return 1;
  74
  75        UNLEAK(graph);
  76        return verify_commit_graph(the_repository, graph);
  77}
  78
  79static int graph_read(int argc, const char **argv)
  80{
  81        struct commit_graph *graph = NULL;
  82        char *graph_name;
  83        int open_ok;
  84        int fd;
  85        struct stat st;
  86
  87        static struct option builtin_commit_graph_read_options[] = {
  88                OPT_STRING(0, "object-dir", &opts.obj_dir,
  89                        N_("dir"),
  90                        N_("The object directory to store the graph")),
  91                OPT_END(),
  92        };
  93
  94        argc = parse_options(argc, argv, NULL,
  95                             builtin_commit_graph_read_options,
  96                             builtin_commit_graph_read_usage, 0);
  97
  98        if (!opts.obj_dir)
  99                opts.obj_dir = get_object_directory();
 100
 101        graph_name = get_commit_graph_filename(opts.obj_dir);
 102
 103        open_ok = open_commit_graph(graph_name, &fd, &st);
 104        if (!open_ok)
 105                die_errno(_("Could not open commit-graph '%s'"), graph_name);
 106
 107        graph = load_commit_graph_one_fd_st(fd, &st);
 108        if (!graph)
 109                return 1;
 110
 111        FREE_AND_NULL(graph_name);
 112
 113        printf("header: %08x %d %d %d %d\n",
 114                ntohl(*(uint32_t*)graph->data),
 115                *(unsigned char*)(graph->data + 4),
 116                *(unsigned char*)(graph->data + 5),
 117                *(unsigned char*)(graph->data + 6),
 118                *(unsigned char*)(graph->data + 7));
 119        printf("num_commits: %u\n", graph->num_commits);
 120        printf("chunks:");
 121
 122        if (graph->chunk_oid_fanout)
 123                printf(" oid_fanout");
 124        if (graph->chunk_oid_lookup)
 125                printf(" oid_lookup");
 126        if (graph->chunk_commit_data)
 127                printf(" commit_metadata");
 128        if (graph->chunk_extra_edges)
 129                printf(" extra_edges");
 130        printf("\n");
 131
 132        UNLEAK(graph);
 133
 134        return 0;
 135}
 136
 137extern int read_replace_refs;
 138
 139static int graph_write(int argc, const char **argv)
 140{
 141        struct string_list *pack_indexes = NULL;
 142        struct string_list *commit_hex = NULL;
 143        struct string_list lines;
 144
 145        static struct option builtin_commit_graph_write_options[] = {
 146                OPT_STRING(0, "object-dir", &opts.obj_dir,
 147                        N_("dir"),
 148                        N_("The object directory to store the graph")),
 149                OPT_BOOL(0, "reachable", &opts.reachable,
 150                        N_("start walk at all refs")),
 151                OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 152                        N_("scan pack-indexes listed by stdin for commits")),
 153                OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 154                        N_("start walk at commits listed by stdin")),
 155                OPT_BOOL(0, "append", &opts.append,
 156                        N_("include all commits already in the commit-graph file")),
 157                OPT_END(),
 158        };
 159
 160        argc = parse_options(argc, argv, NULL,
 161                             builtin_commit_graph_write_options,
 162                             builtin_commit_graph_write_usage, 0);
 163
 164        if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 165                die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 166        if (!opts.obj_dir)
 167                opts.obj_dir = get_object_directory();
 168
 169        read_replace_refs = 0;
 170
 171        if (opts.reachable) {
 172                write_commit_graph_reachable(opts.obj_dir, opts.append, 1);
 173                return 0;
 174        }
 175
 176        string_list_init(&lines, 0);
 177        if (opts.stdin_packs || opts.stdin_commits) {
 178                struct strbuf buf = STRBUF_INIT;
 179
 180                while (strbuf_getline(&buf, stdin) != EOF)
 181                        string_list_append(&lines, strbuf_detach(&buf, NULL));
 182
 183                if (opts.stdin_packs)
 184                        pack_indexes = &lines;
 185                if (opts.stdin_commits)
 186                        commit_hex = &lines;
 187
 188                UNLEAK(buf);
 189        }
 190
 191        write_commit_graph(opts.obj_dir,
 192                           pack_indexes,
 193                           commit_hex,
 194                           opts.append,
 195                           1);
 196
 197        UNLEAK(lines);
 198        return 0;
 199}
 200
 201int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 202{
 203        static struct option builtin_commit_graph_options[] = {
 204                OPT_STRING(0, "object-dir", &opts.obj_dir,
 205                        N_("dir"),
 206                        N_("The object directory to store the graph")),
 207                OPT_END(),
 208        };
 209
 210        if (argc == 2 && !strcmp(argv[1], "-h"))
 211                usage_with_options(builtin_commit_graph_usage,
 212                                   builtin_commit_graph_options);
 213
 214        git_config(git_default_config, NULL);
 215        argc = parse_options(argc, argv, prefix,
 216                             builtin_commit_graph_options,
 217                             builtin_commit_graph_usage,
 218                             PARSE_OPT_STOP_AT_NON_OPTION);
 219
 220        if (argc > 0) {
 221                if (!strcmp(argv[0], "read"))
 222                        return graph_read(argc, argv);
 223                if (!strcmp(argv[0], "verify"))
 224                        return graph_verify(argc, argv);
 225                if (!strcmp(argv[0], "write"))
 226                        return graph_write(argc, argv);
 227        }
 228
 229        usage_with_options(builtin_commit_graph_usage,
 230                           builtin_commit_graph_options);
 231}