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 "commit-graph.h"
   7
   8static 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
  15static const char * const builtin_commit_graph_read_usage[] = {
  16        N_("git commit-graph read [--object-dir <objdir>]"),
  17        NULL
  18};
  19
  20static 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
  25static struct opts_commit_graph {
  26        const char *obj_dir;
  27        int stdin_packs;
  28        int stdin_commits;
  29        int append;
  30} opts;
  31
  32static 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
  80static 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
 143int 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}