Merge branch 'dl/honor-cflags-in-hdr-check'
[git/git.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 original_fetch_if_missing = fetch_if_missing;
20 int res;
21
22 fetch_if_missing = 0;
23 remote = remote_get(remote_name);
24 if (!remote->url[0])
25 die(_("Remote with no URL"));
26 transport = transport_get(remote, remote->url[0]);
27
28 transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
29 transport_set_option(transport, TRANS_OPT_NO_DEPENDENTS, "1");
30 res = transport_fetch_refs(transport, ref);
31 fetch_if_missing = original_fetch_if_missing;
32
33 return res;
34 }
35
36 static int fetch_objects(const char *remote_name,
37 const struct object_id *oids,
38 int oid_nr)
39 {
40 struct ref *ref = NULL;
41 int i;
42
43 for (i = 0; i < oid_nr; i++) {
44 struct ref *new_ref = alloc_ref(oid_to_hex(&oids[i]));
45 oidcpy(&new_ref->old_oid, &oids[i]);
46 new_ref->exact_oid = 1;
47 new_ref->next = ref;
48 ref = new_ref;
49 }
50 return fetch_refs(remote_name, ref);
51 }
52
53 static struct promisor_remote *promisors;
54 static struct promisor_remote **promisors_tail = &promisors;
55
56 static struct promisor_remote *promisor_remote_new(const char *remote_name)
57 {
58 struct promisor_remote *r;
59
60 if (*remote_name == '/') {
61 warning(_("promisor remote name cannot begin with '/': %s"),
62 remote_name);
63 return NULL;
64 }
65
66 FLEX_ALLOC_STR(r, name, remote_name);
67
68 *promisors_tail = r;
69 promisors_tail = &r->next;
70
71 return r;
72 }
73
74 static struct promisor_remote *promisor_remote_lookup(const char *remote_name,
75 struct promisor_remote **previous)
76 {
77 struct promisor_remote *r, *p;
78
79 for (p = NULL, r = promisors; r; p = r, r = r->next)
80 if (!strcmp(r->name, remote_name)) {
81 if (previous)
82 *previous = p;
83 return r;
84 }
85
86 return NULL;
87 }
88
89 static void promisor_remote_move_to_tail(struct promisor_remote *r,
90 struct promisor_remote *previous)
91 {
92 if (r->next == NULL)
93 return;
94
95 if (previous)
96 previous->next = r->next;
97 else
98 promisors = r->next ? r->next : r;
99 r->next = NULL;
100 *promisors_tail = r;
101 promisors_tail = &r->next;
102 }
103
104 static int promisor_remote_config(const char *var, const char *value, void *data)
105 {
106 const char *name;
107 int namelen;
108 const char *subkey;
109
110 if (!strcmp(var, "core.partialclonefilter"))
111 return git_config_string(&core_partial_clone_filter_default,
112 var, value);
113
114 if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
115 return 0;
116
117 if (!strcmp(subkey, "promisor")) {
118 char *remote_name;
119
120 if (!git_config_bool(var, value))
121 return 0;
122
123 remote_name = xmemdupz(name, namelen);
124
125 if (!promisor_remote_lookup(remote_name, NULL))
126 promisor_remote_new(remote_name);
127
128 free(remote_name);
129 return 0;
130 }
131 if (!strcmp(subkey, "partialclonefilter")) {
132 struct promisor_remote *r;
133 char *remote_name = xmemdupz(name, namelen);
134
135 r = promisor_remote_lookup(remote_name, NULL);
136 if (!r)
137 r = promisor_remote_new(remote_name);
138
139 free(remote_name);
140
141 if (!r)
142 return 0;
143
144 return git_config_string(&r->partial_clone_filter, var, value);
145 }
146
147 return 0;
148 }
149
150 static int initialized;
151
152 static void promisor_remote_init(void)
153 {
154 if (initialized)
155 return;
156 initialized = 1;
157
158 git_config(promisor_remote_config, NULL);
159
160 if (repository_format_partial_clone) {
161 struct promisor_remote *o, *previous;
162
163 o = promisor_remote_lookup(repository_format_partial_clone,
164 &previous);
165 if (o)
166 promisor_remote_move_to_tail(o, previous);
167 else
168 promisor_remote_new(repository_format_partial_clone);
169 }
170 }
171
172 static void promisor_remote_clear(void)
173 {
174 while (promisors) {
175 struct promisor_remote *r = promisors;
176 promisors = promisors->next;
177 free(r);
178 }
179
180 promisors_tail = &promisors;
181 }
182
183 void promisor_remote_reinit(void)
184 {
185 initialized = 0;
186 promisor_remote_clear();
187 promisor_remote_init();
188 }
189
190 struct promisor_remote *promisor_remote_find(const char *remote_name)
191 {
192 promisor_remote_init();
193
194 if (!remote_name)
195 return promisors;
196
197 return promisor_remote_lookup(remote_name, NULL);
198 }
199
200 int has_promisor_remote(void)
201 {
202 return !!promisor_remote_find(NULL);
203 }
204
205 static int remove_fetched_oids(struct repository *repo,
206 struct object_id **oids,
207 int oid_nr, int to_free)
208 {
209 int i, remaining_nr = 0;
210 int *remaining = xcalloc(oid_nr, sizeof(*remaining));
211 struct object_id *old_oids = *oids;
212 struct object_id *new_oids;
213
214 for (i = 0; i < oid_nr; i++)
215 if (oid_object_info_extended(repo, &old_oids[i], NULL,
216 OBJECT_INFO_SKIP_FETCH_OBJECT)) {
217 remaining[i] = 1;
218 remaining_nr++;
219 }
220
221 if (remaining_nr) {
222 int j = 0;
223 new_oids = xcalloc(remaining_nr, sizeof(*new_oids));
224 for (i = 0; i < oid_nr; i++)
225 if (remaining[i])
226 oidcpy(&new_oids[j++], &old_oids[i]);
227 *oids = new_oids;
228 if (to_free)
229 free(old_oids);
230 }
231
232 free(remaining);
233
234 return remaining_nr;
235 }
236
237 int promisor_remote_get_direct(struct repository *repo,
238 const struct object_id *oids,
239 int oid_nr)
240 {
241 struct promisor_remote *r;
242 struct object_id *remaining_oids = (struct object_id *)oids;
243 int remaining_nr = oid_nr;
244 int to_free = 0;
245 int res = -1;
246
247 promisor_remote_init();
248
249 for (r = promisors; r; r = r->next) {
250 if (fetch_objects(r->name, remaining_oids, remaining_nr) < 0) {
251 if (remaining_nr == 1)
252 continue;
253 remaining_nr = remove_fetched_oids(repo, &remaining_oids,
254 remaining_nr, to_free);
255 if (remaining_nr) {
256 to_free = 1;
257 continue;
258 }
259 }
260 res = 0;
261 break;
262 }
263
264 if (to_free)
265 free(remaining_oids);
266
267 return res;
268 }