credential: allow wildcard patterns when matching config
[git] / 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
7 static char *repository_format_partial_clone;
8 static const char *core_partial_clone_filter_default;
9
10 void set_repository_format_partial_clone(char *partial_clone)
11 {
12         repository_format_partial_clone = xstrdup_or_null(partial_clone);
13 }
14
15 static int fetch_refs(const char *remote_name, struct ref *ref)
16 {
17         struct remote *remote;
18         struct transport *transport;
19         int res;
20
21         remote = remote_get(remote_name);
22         if (!remote->url[0])
23                 die(_("Remote with no URL"));
24         transport = transport_get(remote, remote->url[0]);
25
26         transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
27         transport_set_option(transport, TRANS_OPT_NO_DEPENDENTS, "1");
28         res = transport_fetch_refs(transport, ref);
29
30         return res;
31 }
32
33 static int fetch_objects(const char *remote_name,
34                          const struct object_id *oids,
35                          int oid_nr)
36 {
37         struct ref *ref = NULL;
38         int i;
39
40         for (i = 0; i < oid_nr; i++) {
41                 struct ref *new_ref = alloc_ref(oid_to_hex(&oids[i]));
42                 oidcpy(&new_ref->old_oid, &oids[i]);
43                 new_ref->exact_oid = 1;
44                 new_ref->next = ref;
45                 ref = new_ref;
46         }
47         return fetch_refs(remote_name, ref);
48 }
49
50 static struct promisor_remote *promisors;
51 static struct promisor_remote **promisors_tail = &promisors;
52
53 static struct promisor_remote *promisor_remote_new(const char *remote_name)
54 {
55         struct promisor_remote *r;
56
57         if (*remote_name == '/') {
58                 warning(_("promisor remote name cannot begin with '/': %s"),
59                         remote_name);
60                 return NULL;
61         }
62
63         FLEX_ALLOC_STR(r, name, remote_name);
64
65         *promisors_tail = r;
66         promisors_tail = &r->next;
67
68         return r;
69 }
70
71 static struct promisor_remote *promisor_remote_lookup(const char *remote_name,
72                                                       struct promisor_remote **previous)
73 {
74         struct promisor_remote *r, *p;
75
76         for (p = NULL, r = promisors; r; p = r, r = r->next)
77                 if (!strcmp(r->name, remote_name)) {
78                         if (previous)
79                                 *previous = p;
80                         return r;
81                 }
82
83         return NULL;
84 }
85
86 static void promisor_remote_move_to_tail(struct promisor_remote *r,
87                                          struct promisor_remote *previous)
88 {
89         if (r->next == NULL)
90                 return;
91
92         if (previous)
93                 previous->next = r->next;
94         else
95                 promisors = r->next ? r->next : r;
96         r->next = NULL;
97         *promisors_tail = r;
98         promisors_tail = &r->next;
99 }
100
101 static int promisor_remote_config(const char *var, const char *value, void *data)
102 {
103         const char *name;
104         int namelen;
105         const char *subkey;
106
107         if (!strcmp(var, "core.partialclonefilter"))
108                 return git_config_string(&core_partial_clone_filter_default,
109                                          var, value);
110
111         if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
112                 return 0;
113
114         if (!strcmp(subkey, "promisor")) {
115                 char *remote_name;
116
117                 if (!git_config_bool(var, value))
118                         return 0;
119
120                 remote_name = xmemdupz(name, namelen);
121
122                 if (!promisor_remote_lookup(remote_name, NULL))
123                         promisor_remote_new(remote_name);
124
125                 free(remote_name);
126                 return 0;
127         }
128         if (!strcmp(subkey, "partialclonefilter")) {
129                 struct promisor_remote *r;
130                 char *remote_name = xmemdupz(name, namelen);
131
132                 r = promisor_remote_lookup(remote_name, NULL);
133                 if (!r)
134                         r = promisor_remote_new(remote_name);
135
136                 free(remote_name);
137
138                 if (!r)
139                         return 0;
140
141                 return git_config_string(&r->partial_clone_filter, var, value);
142         }
143
144         return 0;
145 }
146
147 static int initialized;
148
149 static void promisor_remote_init(void)
150 {
151         if (initialized)
152                 return;
153         initialized = 1;
154
155         git_config(promisor_remote_config, NULL);
156
157         if (repository_format_partial_clone) {
158                 struct promisor_remote *o, *previous;
159
160                 o = promisor_remote_lookup(repository_format_partial_clone,
161                                            &previous);
162                 if (o)
163                         promisor_remote_move_to_tail(o, previous);
164                 else
165                         promisor_remote_new(repository_format_partial_clone);
166         }
167 }
168
169 static void promisor_remote_clear(void)
170 {
171         while (promisors) {
172                 struct promisor_remote *r = promisors;
173                 promisors = promisors->next;
174                 free(r);
175         }
176
177         promisors_tail = &promisors;
178 }
179
180 void promisor_remote_reinit(void)
181 {
182         initialized = 0;
183         promisor_remote_clear();
184         promisor_remote_init();
185 }
186
187 struct promisor_remote *promisor_remote_find(const char *remote_name)
188 {
189         promisor_remote_init();
190
191         if (!remote_name)
192                 return promisors;
193
194         return promisor_remote_lookup(remote_name, NULL);
195 }
196
197 int has_promisor_remote(void)
198 {
199         return !!promisor_remote_find(NULL);
200 }
201
202 static int remove_fetched_oids(struct repository *repo,
203                                struct object_id **oids,
204                                int oid_nr, int to_free)
205 {
206         int i, remaining_nr = 0;
207         int *remaining = xcalloc(oid_nr, sizeof(*remaining));
208         struct object_id *old_oids = *oids;
209         struct object_id *new_oids;
210
211         for (i = 0; i < oid_nr; i++)
212                 if (oid_object_info_extended(repo, &old_oids[i], NULL,
213                                              OBJECT_INFO_SKIP_FETCH_OBJECT)) {
214                         remaining[i] = 1;
215                         remaining_nr++;
216                 }
217
218         if (remaining_nr) {
219                 int j = 0;
220                 new_oids = xcalloc(remaining_nr, sizeof(*new_oids));
221                 for (i = 0; i < oid_nr; i++)
222                         if (remaining[i])
223                                 oidcpy(&new_oids[j++], &old_oids[i]);
224                 *oids = new_oids;
225                 if (to_free)
226                         free(old_oids);
227         }
228
229         free(remaining);
230
231         return remaining_nr;
232 }
233
234 int promisor_remote_get_direct(struct repository *repo,
235                                const struct object_id *oids,
236                                int oid_nr)
237 {
238         struct promisor_remote *r;
239         struct object_id *remaining_oids = (struct object_id *)oids;
240         int remaining_nr = oid_nr;
241         int to_free = 0;
242         int res = -1;
243
244         promisor_remote_init();
245
246         for (r = promisors; r; r = r->next) {
247                 if (fetch_objects(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 }