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 void promisor_remote_move_to_tail(struct promisor_remote *r,
  44                                          struct promisor_remote *previous)
  45 {
  46         if (previous)
  47                 previous->next = r->next;
  48         else
  49                 promisors = r->next ? r->next : r;
  50         r->next = NULL;
  51         *promisors_tail = r;
  52         promisors_tail = &r->next;
  53 }
  54
  55 static int promisor_remote_config(const char *var, const char *value, void *data)
  56 {
  57         const char *name;
  58         int namelen;
  59         const char *subkey;
  60
  61         if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
  62                 return 0;
  63
  64         if (!strcmp(subkey, "promisor")) {
  65                 char *remote_name;
  66
  67                 if (!git_config_bool(var, value))
  68                         return 0;
  69
  70                 remote_name = xmemdupz(name, namelen);
  71
  72                 if (!promisor_remote_lookup(remote_name, NULL))
  73                         promisor_remote_new(remote_name);
  74
  75                 free(remote_name);
  76                 return 0;
  77         }
  78         if (!strcmp(subkey, "partialclonefilter")) {
  79                 struct promisor_remote *r;
  80                 char *remote_name = xmemdupz(name, namelen);
  81
  82                 r = promisor_remote_lookup(remote_name, NULL);
  83                 if (!r)
  84                         r = promisor_remote_new(remote_name);
  85
  86                 free(remote_name);
  87
  88                 if (!r)
  89                         return 0;
  90
  91                 return git_config_string(&r->partial_clone_filter, var, value);
  92         }
  93
  94         return 0;
  95 }
  96
  97 static int initialized;
  98
  99 static void promisor_remote_init(void)
 100 {
 101         if (initialized)
 102                 return;
 103         initialized = 1;
 104
 105         git_config(promisor_remote_config, NULL);
 106
 107         if (repository_format_partial_clone) {
 108                 struct promisor_remote *o, *previous;
 109
 110                 o = promisor_remote_lookup(repository_format_partial_clone,
 111                                            &previous);
 112                 if (o)
 113                         promisor_remote_move_to_tail(o, previous);
 114                 else
 115                         promisor_remote_new(repository_format_partial_clone);
 116         }
 117 }
 118
 119 static void promisor_remote_clear(void)
 120 {
 121         while (promisors) {
 122                 struct promisor_remote *r = promisors;
 123                 promisors = promisors->next;
 124                 free(r);
 125         }
 126
 127         promisors_tail = &promisors;
 128 }
 129
 130 void promisor_remote_reinit(void)
 131 {
 132         initialized = 0;
 133         promisor_remote_clear();
 134         promisor_remote_init();
 135 }
 136
 137 struct promisor_remote *promisor_remote_find(const char *remote_name)
 138 {
 139         promisor_remote_init();
 140
 141         if (!remote_name)
 142                 return promisors;
 143
 144         return promisor_remote_lookup(remote_name, NULL);
 145 }
 146
 147 int has_promisor_remote(void)
 148 {
 149         return !!promisor_remote_find(NULL);
 150 }
 151
 152 static int remove_fetched_oids(struct repository *repo,
 153                                struct object_id **oids,
 154                                int oid_nr, int to_free)
 155 {
 156         int i, remaining_nr = 0;
 157         int *remaining = xcalloc(oid_nr, sizeof(*remaining));
 158         struct object_id *old_oids = *oids;
 159         struct object_id *new_oids;
 160
 161         for (i = 0; i < oid_nr; i++)
 162                 if (oid_object_info_extended(repo, &old_oids[i], NULL,
 163                                              OBJECT_INFO_SKIP_FETCH_OBJECT)) {
 164                         remaining[i] = 1;
 165                         remaining_nr++;
 166                 }
 167
 168         if (remaining_nr) {
 169                 int j = 0;
 170                 new_oids = xcalloc(remaining_nr, sizeof(*new_oids));
 171                 for (i = 0; i < oid_nr; i++)
 172                         if (remaining[i])
 173                                 oidcpy(&new_oids[j++], &old_oids[i]);
 174                 *oids = new_oids;
 175                 if (to_free)
 176                         free(old_oids);
 177         }
 178
 179         free(remaining);
 180
 181         return remaining_nr;
 182 }
 183
 184 int promisor_remote_get_direct(struct repository *repo,
 185                                const struct object_id *oids,
 186                                int oid_nr)
 187 {
 188         struct promisor_remote *r;
 189         struct object_id *remaining_oids = (struct object_id *)oids;
 190         int remaining_nr = oid_nr;
 191         int to_free = 0;
 192         int res = -1;
 193
 194         promisor_remote_init();
 195
 196         for (r = promisors; r; r = r->next) {
 197                 if (fetch_objects(r->name, remaining_oids, remaining_nr) < 0) {
 198                         if (remaining_nr == 1)
 199                                 continue;
 200                         remaining_nr = remove_fetched_oids(repo, &remaining_oids,
 201                                                          remaining_nr, to_free);
 202                         if (remaining_nr) {
 203                                 to_free = 1;
 204                                 continue;
 205                         }
 206                 }
 207                 res = 0;
 208                 break;
 209         }
 210
 211         if (to_free)
 212                 free(remaining_oids);
 213
 214         return res;
 215 }