git.oblomov.eu Git - git/blob - promisor-remote.c

   1 #include "cache.h"
   2 #include "object-store.h"
   3 #include "promisor-remote.h"
   4 #include "config.h"
   5 #include "transport.h"
   6 #include "strvec.h"
   7
   8 struct promisor_remote_config {
   9         struct promisor_remote *promisors;
  10         struct promisor_remote **promisors_tail;
  11 };
  12
  13 static int fetch_objects(struct repository *repo,
  14                          const char *remote_name,
  15                          const struct object_id *oids,
  16                          int oid_nr)
  17 {
  18         struct child_process child = CHILD_PROCESS_INIT;
  19         int i;
  20         FILE *child_in;
  21
  22         child.git_cmd = 1;
  23         child.in = -1;
  24         if (repo != the_repository)
  25                 prepare_other_repo_env(&child.env_array, repo->gitdir);
  26         strvec_pushl(&child.args, "-c", "fetch.negotiationAlgorithm=noop",
  27                      "fetch", remote_name, "--no-tags",
  28                      "--no-write-fetch-head", "--recurse-submodules=no",
  29                      "--filter=blob:none", "--stdin", NULL);
  30         if (start_command(&child))
  31                 die(_("promisor-remote: unable to fork off fetch subprocess"));
  32         child_in = xfdopen(child.in, "w");
  33
  34         for (i = 0; i < oid_nr; i++) {
  35                 if (fputs(oid_to_hex(&oids[i]), child_in) < 0)
  36                         die_errno(_("promisor-remote: could not write to fetch subprocess"));
  37                 if (fputc('\n', child_in) < 0)
  38                         die_errno(_("promisor-remote: could not write to fetch subprocess"));
  39         }
  40
  41         if (fclose(child_in) < 0)
  42                 die_errno(_("promisor-remote: could not close stdin to fetch subprocess"));
  43         return finish_command(&child) ? -1 : 0;
  44 }
  45
  46 static struct promisor_remote *promisor_remote_new(struct promisor_remote_config *config,
  47                                                    const char *remote_name)
  48 {
  49         struct promisor_remote *r;
  50
  51         if (*remote_name == '/') {
  52                 warning(_("promisor remote name cannot begin with '/': %s"),
  53                         remote_name);
  54                 return NULL;
  55         }
  56
  57         FLEX_ALLOC_STR(r, name, remote_name);
  58
  59         *config->promisors_tail = r;
  60         config->promisors_tail = &r->next;
  61
  62         return r;
  63 }
  64
  65 static struct promisor_remote *promisor_remote_lookup(struct promisor_remote_config *config,
  66                                                       const char *remote_name,
  67                                                       struct promisor_remote **previous)
  68 {
  69         struct promisor_remote *r, *p;
  70
  71         for (p = NULL, r = config->promisors; r; p = r, r = r->next)
  72                 if (!strcmp(r->name, remote_name)) {
  73                         if (previous)
  74                                 *previous = p;
  75                         return r;
  76                 }
  77
  78         return NULL;
  79 }
  80
  81 static void promisor_remote_move_to_tail(struct promisor_remote_config *config,
  82                                          struct promisor_remote *r,
  83                                          struct promisor_remote *previous)
  84 {
  85         if (r->next == NULL)
  86                 return;
  87
  88         if (previous)
  89                 previous->next = r->next;
  90         else
  91                 config->promisors = r->next ? r->next : r;
  92         r->next = NULL;
  93         *config->promisors_tail = r;
  94         config->promisors_tail = &r->next;
  95 }
  96
  97 static int promisor_remote_config(const char *var, const char *value, void *data)
  98 {
  99         struct promisor_remote_config *config = data;
 100         const char *name;
 101         size_t namelen;
 102         const char *subkey;
 103
 104         if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
 105                 return 0;
 106
 107         if (!strcmp(subkey, "promisor")) {
 108                 char *remote_name;
 109
 110                 if (!git_config_bool(var, value))
 111                         return 0;
 112
 113                 remote_name = xmemdupz(name, namelen);
 114
 115                 if (!promisor_remote_lookup(config, remote_name, NULL))
 116                         promisor_remote_new(config, remote_name);
 117
 118                 free(remote_name);
 119                 return 0;
 120         }
 121         if (!strcmp(subkey, "partialclonefilter")) {
 122                 struct promisor_remote *r;
 123                 char *remote_name = xmemdupz(name, namelen);
 124
 125                 r = promisor_remote_lookup(config, remote_name, NULL);
 126                 if (!r)
 127                         r = promisor_remote_new(config, remote_name);
 128
 129                 free(remote_name);
 130
 131                 if (!r)
 132                         return 0;
 133
 134                 return git_config_string(&r->partial_clone_filter, var, value);
 135         }
 136
 137         return 0;
 138 }
 139
 140 static void promisor_remote_init(struct repository *r)
 141 {
 142         struct promisor_remote_config *config;
 143
 144         if (r->promisor_remote_config)
 145                 return;
 146         config = r->promisor_remote_config =
 147                 xcalloc(sizeof(*r->promisor_remote_config), 1);
 148         config->promisors_tail = &config->promisors;
 149
 150         repo_config(r, promisor_remote_config, config);
 151
 152         if (r->repository_format_partial_clone) {
 153                 struct promisor_remote *o, *previous;
 154
 155                 o = promisor_remote_lookup(config,
 156                                            r->repository_format_partial_clone,
 157                                            &previous);
 158                 if (o)
 159                         promisor_remote_move_to_tail(config, o, previous);
 160                 else
 161                         promisor_remote_new(config, r->repository_format_partial_clone);
 162         }
 163 }
 164
 165 void promisor_remote_clear(struct promisor_remote_config *config)
 166 {
 167         while (config->promisors) {
 168                 struct promisor_remote *r = config->promisors;
 169                 config->promisors = config->promisors->next;
 170                 free(r);
 171         }
 172
 173         config->promisors_tail = &config->promisors;
 174 }
 175
 176 void repo_promisor_remote_reinit(struct repository *r)
 177 {
 178         promisor_remote_clear(r->promisor_remote_config);
 179         FREE_AND_NULL(r->promisor_remote_config);
 180         promisor_remote_init(r);
 181 }
 182
 183 struct promisor_remote *repo_promisor_remote_find(struct repository *r,
 184                                                   const char *remote_name)
 185 {
 186         promisor_remote_init(r);
 187
 188         if (!remote_name)
 189                 return r->promisor_remote_config->promisors;
 190
 191         return promisor_remote_lookup(r->promisor_remote_config, remote_name, NULL);
 192 }
 193
 194 int repo_has_promisor_remote(struct repository *r)
 195 {
 196         return !!repo_promisor_remote_find(r, NULL);
 197 }
 198
 199 static int remove_fetched_oids(struct repository *repo,
 200                                struct object_id **oids,
 201                                int oid_nr, int to_free)
 202 {
 203         int i, remaining_nr = 0;
 204         int *remaining = xcalloc(oid_nr, sizeof(*remaining));
 205         struct object_id *old_oids = *oids;
 206         struct object_id *new_oids;
 207
 208         for (i = 0; i < oid_nr; i++)
 209                 if (oid_object_info_extended(repo, &old_oids[i], NULL,
 210                                              OBJECT_INFO_SKIP_FETCH_OBJECT)) {
 211                         remaining[i] = 1;
 212                         remaining_nr++;
 213                 }
 214
 215         if (remaining_nr) {
 216                 int j = 0;
 217                 CALLOC_ARRAY(new_oids, remaining_nr);
 218                 for (i = 0; i < oid_nr; i++)
 219                         if (remaining[i])
 220                                 oidcpy(&new_oids[j++], &old_oids[i]);
 221                 *oids = new_oids;
 222                 if (to_free)
 223                         free(old_oids);
 224         }
 225
 226         free(remaining);
 227
 228         return remaining_nr;
 229 }
 230
 231 int promisor_remote_get_direct(struct repository *repo,
 232                                const struct object_id *oids,
 233                                int oid_nr)
 234 {
 235         struct promisor_remote *r;
 236         struct object_id *remaining_oids = (struct object_id *)oids;
 237         int remaining_nr = oid_nr;
 238         int to_free = 0;
 239         int res = -1;
 240
 241         if (oid_nr == 0)
 242                 return 0;
 243
 244         promisor_remote_init(repo);
 245
 246         for (r = repo->promisor_remote_config->promisors; r; r = r->next) {
 247                 if (fetch_objects(repo, r->name, remaining_oids, remaining_nr) < 0) {
 248                         if (remaining_nr == 1)
 249                                 continue;
 250                         remaining_nr = remove_fetched_oids(repo, &remaining_oids,
 251                                                          remaining_nr, to_free);
 252                         if (remaining_nr) {
 253                                 to_free = 1;
 254                                 continue;
 255                         }
 256                 }
 257                 res = 0;
 258                 break;
 259         }
 260
 261         if (to_free)
 262                 free(remaining_oids);
 263
 264         return res;
 265 }