git.oblomov.eu Git - 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
   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>] [--file=<hash>]"),
  11         N_("git commit-graph write [--object-dir <objdir>] [--set-latest]"),
  12         NULL
  13 };
  14
  15 static const char * const builtin_commit_graph_read_usage[] = {
  16         N_("git commit-graph read [--object-dir <objdir>] [--file=<hash>]"),
  17         NULL
  18 };
  19
  20 static const char * const builtin_commit_graph_write_usage[] = {
  21         N_("git commit-graph write [--object-dir <objdir>] [--set-latest]"),
  22         NULL
  23 };
  24
  25 static struct opts_commit_graph {
  26         const char *obj_dir;
  27         const char *graph_file;
  28         int set_latest;
  29 } opts;
  30
  31 static int graph_read(int argc, const char **argv)
  32 {
  33         struct commit_graph *graph = 0;
  34         struct strbuf full_path = STRBUF_INIT;
  35
  36         static struct option builtin_commit_graph_read_options[] = {
  37                 { OPTION_STRING, 'o', "object-dir", &opts.obj_dir,
  38                         N_("dir"),
  39                         N_("The object directory to store the graph") },
  40                 { OPTION_STRING, 'H', "file", &opts.graph_file,
  41                         N_("file"),
  42                         N_("The filename for a specific commit graph file in the object directory."),
  43                         PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
  44                 OPT_END(),
  45         };
  46
  47         argc = parse_options(argc, argv, NULL,
  48                              builtin_commit_graph_read_options,
  49                              builtin_commit_graph_read_usage, 0);
  50
  51         if (!opts.obj_dir)
  52                 opts.obj_dir = get_object_directory();
  53
  54         if (!opts.graph_file)
  55                 die("no graph hash specified");
  56
  57         strbuf_addf(&full_path, "%s/info/%s", opts.obj_dir, opts.graph_file);
  58         graph = load_commit_graph_one(full_path.buf);
  59
  60         if (!graph)
  61                 die("graph file %s does not exist", full_path.buf);
  62
  63         printf("header: %08x %d %d %d %d\n",
  64                 ntohl(*(uint32_t*)graph->data),
  65                 *(unsigned char*)(graph->data + 4),
  66                 *(unsigned char*)(graph->data + 5),
  67                 *(unsigned char*)(graph->data + 6),
  68                 *(unsigned char*)(graph->data + 7));
  69         printf("num_commits: %u\n", graph->num_commits);
  70         printf("chunks:");
  71
  72         if (graph->chunk_oid_fanout)
  73                 printf(" oid_fanout");
  74         if (graph->chunk_oid_lookup)
  75                 printf(" oid_lookup");
  76         if (graph->chunk_commit_data)
  77                 printf(" commit_metadata");
  78         if (graph->chunk_large_edges)
  79                 printf(" large_edges");
  80         printf("\n");
  81
  82         return 0;
  83 }
  84
  85 static void set_latest_file(const char *obj_dir, const char *graph_file)
  86 {
  87         int fd;
  88         struct lock_file lk = LOCK_INIT;
  89         char *latest_fname = get_graph_latest_filename(obj_dir);
  90
  91         fd = hold_lock_file_for_update(&lk, latest_fname, LOCK_DIE_ON_ERROR);
  92         FREE_AND_NULL(latest_fname);
  93
  94         if (fd < 0)
  95                 die_errno("unable to open graph-head");
  96
  97         write_in_full(fd, graph_file, strlen(graph_file));
  98         commit_lock_file(&lk);
  99 }
 100
 101 static int graph_write(int argc, const char **argv)
 102 {
 103         char *graph_name;
 104
 105         static struct option builtin_commit_graph_write_options[] = {
 106                 { OPTION_STRING, 'o', "object-dir", &opts.obj_dir,
 107                         N_("dir"),
 108                         N_("The object directory to store the graph") },
 109                 OPT_BOOL('u', "set-latest", &opts.set_latest,
 110                         N_("update graph-head to written graph file")),
 111                 OPT_END(),
 112         };
 113
 114         argc = parse_options(argc, argv, NULL,
 115                              builtin_commit_graph_write_options,
 116                              builtin_commit_graph_write_usage, 0);
 117
 118         if (!opts.obj_dir)
 119                 opts.obj_dir = get_object_directory();
 120
 121         graph_name = write_commit_graph(opts.obj_dir);
 122
 123         if (graph_name) {
 124                 if (opts.set_latest)
 125                         set_latest_file(opts.obj_dir, graph_name);
 126
 127                 printf("%s\n", graph_name);
 128                 FREE_AND_NULL(graph_name);
 129         }
 130
 131         return 0;
 132 }
 133
 134 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
 135 {
 136         static struct option builtin_commit_graph_options[] = {
 137                 { OPTION_STRING, 'o', "object-dir", &opts.obj_dir,
 138                         N_("dir"),
 139                         N_("The object directory to store the graph") },
 140                 OPT_END(),
 141         };
 142
 143         if (argc == 2 && !strcmp(argv[1], "-h"))
 144                 usage_with_options(builtin_commit_graph_usage,
 145                                    builtin_commit_graph_options);
 146
 147         git_config(git_default_config, NULL);
 148         argc = parse_options(argc, argv, prefix,
 149                              builtin_commit_graph_options,
 150                              builtin_commit_graph_usage,
 151                              PARSE_OPT_STOP_AT_NON_OPTION);
 152
 153         if (argc > 0) {
 154                 if (!strcmp(argv[0], "read"))
 155                         return graph_read(argc, argv);
 156                 if (!strcmp(argv[0], "write"))
 157                         return graph_write(argc, argv);
 158         }
 159
 160         usage_with_options(builtin_commit_graph_usage,
 161                            builtin_commit_graph_options);
 162 }