promisor-remote.c

   1 #include "cache.h"
   2 #include "object-store.h"
   3 #include "promisor-remote.h"
   4 #include "config.h"
   5 #include "fetch-object.h"
   6
   7 static struct promisor_remote *promisors;
   8 static struct promisor_remote **promisors_tail = &promisors;
   9
  10 static struct promisor_remote *promisor_remote_new(const char *remote_name)
  11 {
  12         struct promisor_remote *r;
  13
  14         if (*remote_name == '/') {
  15                 warning(_("promisor remote name cannot begin with '/': %s"),
  16                         remote_name);
  17                 return NULL;
  18         }
  19
  20         FLEX_ALLOC_STR(r, name, remote_name);
  21
  22         *promisors_tail = r;
  23         promisors_tail = &r->next;
  24
  25         return r;
  26 }
  27
  28 static struct promisor_remote *promisor_remote_lookup(const char *remote_name,
  29                                                       struct promisor_remote **previous)
  30 {
  31         struct promisor_remote *r, *p;
  32
  33         for (p = NULL, r = promisors; r; p = r, r = r->next)
  34                 if (!strcmp(r->name, remote_name)) {
  35                         if (previous)
  36                                 *previous = p;
  37                         return r;
  38                 }
  39
  40         return NULL;
  41 }
  42
  43 static int promisor_remote_config(const char *var, const char *value, void *data)
  44 {
  45         const char *name;
  46         int namelen;
  47         const char *subkey;
  48
  49         if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
  50                 return 0;
  51
  52         if (!strcmp(subkey, "promisor")) {
  53                 char *remote_name;
  54
  55                 if (!git_config_bool(var, value))
  56                         return 0;
  57
  58                 remote_name = xmemdupz(name, namelen);
  59
  60                 if (!promisor_remote_lookup(remote_name, NULL))
  61                         promisor_remote_new(remote_name);
  62
  63                 free(remote_name);
  64                 return 0;
  65         }
  66
  67         return 0;
  68 }
  69
  70 static void promisor_remote_init(void)
  71 {
  72         static int initialized;
  73
  74         if (initialized)
  75                 return;
  76         initialized = 1;
  77
  78         git_config(promisor_remote_config, NULL);
  79 }
  80
  81 struct promisor_remote *promisor_remote_find(const char *remote_name)
  82 {
  83         promisor_remote_init();
  84
  85         if (!remote_name)
  86                 return promisors;
  87
  88         return promisor_remote_lookup(remote_name, NULL);
  89 }
  90
  91 int has_promisor_remote(void)
  92 {
  93         return !!promisor_remote_find(NULL);
  94 }
  95
  96 static int remove_fetched_oids(struct repository *repo,
  97                                struct object_id **oids,
  98                                int oid_nr, int to_free)
  99 {
 100         int i, remaining_nr = 0;
 101         int *remaining = xcalloc(oid_nr, sizeof(*remaining));
 102         struct object_id *old_oids = *oids;
 103         struct object_id *new_oids;
 104
 105         for (i = 0; i < oid_nr; i++)
 106                 if (oid_object_info_extended(repo, &old_oids[i], NULL,
 107                                              OBJECT_INFO_SKIP_FETCH_OBJECT)) {
 108                         remaining[i] = 1;
 109                         remaining_nr++;
 110                 }
 111
 112         if (remaining_nr) {
 113                 int j = 0;
 114                 new_oids = xcalloc(remaining_nr, sizeof(*new_oids));
 115                 for (i = 0; i < oid_nr; i++)
 116                         if (remaining[i])
 117                                 oidcpy(&new_oids[j++], &old_oids[i]);
 118                 *oids = new_oids;
 119                 if (to_free)
 120                         free(old_oids);
 121         }
 122
 123         free(remaining);
 124
 125         return remaining_nr;
 126 }
 127
 128 int promisor_remote_get_direct(struct repository *repo,
 129                                const struct object_id *oids,
 130                                int oid_nr)
 131 {
 132         struct promisor_remote *r;
 133         struct object_id *remaining_oids = (struct object_id *)oids;
 134         int remaining_nr = oid_nr;
 135         int to_free = 0;
 136         int res = -1;
 137
 138         promisor_remote_init();
 139
 140         for (r = promisors; r; r = r->next) {
 141                 if (fetch_objects(r->name, remaining_oids, remaining_nr) < 0) {
 142                         if (remaining_nr == 1)
 143                                 continue;
 144                         remaining_nr = remove_fetched_oids(repo, &remaining_oids,
 145                                                          remaining_nr, to_free);
 146                         if (remaining_nr) {
 147                                 to_free = 1;
 148                                 continue;
 149                         }
 150                 }
 151                 res = 0;
 152                 break;
 153         }
 154
 155         if (to_free)
 156                 free(remaining_oids);
 157
 158         return res;
 159 }