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        int result = 0;
 145        unsigned int flags = COMMIT_GRAPH_PROGRESS;
 146
 147        static struct option builtin_commit_graph_write_options[] = {
 148                OPT_STRING(0, "object-dir", &opts.obj_dir,
 149                        N_("dir"),
 150                        N_("The object directory to store the graph")),
 151                OPT_BOOL(0, "reachable", &opts.reachable,
 152                        N_("start walk at all refs")),
 153                OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
 154                        N_("scan pack-indexes listed by stdin for commits")),
 155                OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
 156                        N_("start walk at commits listed by stdin")),
 157                OPT_BOOL(0, "append", &opts.append,
 158                        N_("include all commits already in the commit-graph file")),
 159                OPT_END(),
 160        };
 161
 162        argc = parse_options(argc, argv, NULL,
 163                             builtin_commit_graph_write_options,
 164                             builtin_commit_graph_write_usage, 0);
 165
 166        if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
 167                die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 168        if (!opts.obj_dir)
 169                opts.obj_dir = get_object_directory();
 170        if (opts.append)
 171                flags |= COMMIT_GRAPH_APPEND;
 172
 173        read_replace_refs = 0;
 174
 175        if (opts.reachable)
 176                return write_commit_graph_reachable(opts.obj_dir, flags);
 177
 178        string_list_init(&lines, 0);
 179        if (opts.stdin_packs || opts.stdin_commits) {
 180                struct strbuf buf = STRBUF_INIT;
 181
 182                while (strbuf_getline(&buf, stdin) != EOF)
 183                        string_list_append(&lines, strbuf_detach(&buf, NULL));
 184
 185                if (opts.stdin_packs)
 186                        pack_indexes = &lines;
 187                if (opts.stdin_commits)
 188                        commit_hex = &lines;
 189
 190                UNLEAK(buf);
 191        }
 192
 193        if (write_commit_graph(opts.obj_dir,
 194                               pack_indexes,
 195                               commit_hex,
 196                               flags))
 197                result = 1;
 198
 199        UNLEAK(lines);
 200        return result;
 201}
 202
 203int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 204{
 205        static struct option builtin_commit_graph_options[] = {
 206                OPT_STRING(0, "object-dir", &opts.obj_dir,
 207                        N_("dir"),
 208                        N_("The object directory to store the graph")),
 209                OPT_END(),
 210        };
 211
 212        if (argc == 2 && !strcmp(argv[1], "-h"))
 213                usage_with_options(builtin_commit_graph_usage,
 214                                   builtin_commit_graph_options);
 215
 216        git_config(git_default_config, NULL);
 217        argc = parse_options(argc, argv, prefix,
 218                             builtin_commit_graph_options,
 219                             builtin_commit_graph_usage,
 220                             PARSE_OPT_STOP_AT_NON_OPTION);
 221
 222        if (argc > 0) {
 223                if (!strcmp(argv[0], "read"))
 224                        return graph_read(argc, argv);
 225                if (!strcmp(argv[0], "verify"))
 226                        return graph_verify(argc, argv);
 227                if (!strcmp(argv[0], "write"))
 228                        return graph_write(argc, argv);
 229        }
 230
 231        usage_with_options(builtin_commit_graph_usage,
 232                           builtin_commit_graph_options);
 233}