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] [--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] [--stdin-packs|--stdin-commits]"),
  29        NULL
  30};
  31
  32static struct opts_commit_graph {
  33        const char *obj_dir;
  34        int stdin_packs;
  35        int stdin_commits;
  36        int append;
  37} opts;
  38
  39
  40static 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
  69static 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
 120static 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
 183int 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}