Remove fetch-object.{c,h} in favor of promisor-remote.{c,h}
[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 int fetch_refs(const char *remote_name, struct ref *ref)
8 {
9 struct remote *remote;
10 struct transport *transport;
11 int original_fetch_if_missing = fetch_if_missing;
12 int res;
13
14 fetch_if_missing = 0;
15 remote = remote_get(remote_name);
16 if (!remote->url[0])
17 die(_("Remote with no URL"));
18 transport = transport_get(remote, remote->url[0]);
19
20 transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
21 transport_set_option(transport, TRANS_OPT_NO_DEPENDENTS, "1");
22 res = transport_fetch_refs(transport, ref);
23 fetch_if_missing = original_fetch_if_missing;
24
25 return res;
26 }
27
28 static int fetch_objects(const char *remote_name,
29 const struct object_id *oids,
30 int oid_nr)
31 {
32 struct ref *ref = NULL;
33 int i;
34
35 for (i = 0; i < oid_nr; i++) {
36 struct ref *new_ref = alloc_ref(oid_to_hex(&oids[i]));
37 oidcpy(&new_ref->old_oid, &oids[i]);
38 new_ref->exact_oid = 1;
39 new_ref->next = ref;
40 ref = new_ref;
41 }
42 return fetch_refs(remote_name, ref);
43 }
44
45 static struct promisor_remote *promisors;
46 static struct promisor_remote **promisors_tail = &promisors;
47
48 static struct promisor_remote *promisor_remote_new(const char *remote_name)
49 {
50 struct promisor_remote *r;
51
52 if (*remote_name == '/') {
53 warning(_("promisor remote name cannot begin with '/': %s"),
54 remote_name);
55 return NULL;
56 }
57
58 FLEX_ALLOC_STR(r, name, remote_name);
59
60 *promisors_tail = r;
61 promisors_tail = &r->next;
62
63 return r;
64 }
65
66 static struct promisor_remote *promisor_remote_lookup(const char *remote_name,
67 struct promisor_remote **previous)
68 {
69 struct promisor_remote *r, *p;
70
71 for (p = NULL, r = 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 *r,
82 struct promisor_remote *previous)
83 {
84 if (previous)
85 previous->next = r->next;
86 else
87 promisors = r->next ? r->next : r;
88 r->next = NULL;
89 *promisors_tail = r;
90 promisors_tail = &r->next;
91 }
92
93 static int promisor_remote_config(const char *var, const char *value, void *data)
94 {
95 const char *name;
96 int namelen;
97 const char *subkey;
98
99 if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
100 return 0;
101
102 if (!strcmp(subkey, "promisor")) {
103 char *remote_name;
104
105 if (!git_config_bool(var, value))
106 return 0;
107
108 remote_name = xmemdupz(name, namelen);
109
110 if (!promisor_remote_lookup(remote_name, NULL))
111 promisor_remote_new(remote_name);
112
113 free(remote_name);
114 return 0;
115 }
116 if (!strcmp(subkey, "partialclonefilter")) {
117 struct promisor_remote *r;
118 char *remote_name = xmemdupz(name, namelen);
119
120 r = promisor_remote_lookup(remote_name, NULL);
121 if (!r)
122 r = promisor_remote_new(remote_name);
123
124 free(remote_name);
125
126 if (!r)
127 return 0;
128
129 return git_config_string(&r->partial_clone_filter, var, value);
130 }
131
132 return 0;
133 }
134
135 static int initialized;
136
137 static void promisor_remote_init(void)
138 {
139 if (initialized)
140 return;
141 initialized = 1;
142
143 git_config(promisor_remote_config, NULL);
144
145 if (repository_format_partial_clone) {
146 struct promisor_remote *o, *previous;
147
148 o = promisor_remote_lookup(repository_format_partial_clone,
149 &previous);
150 if (o)
151 promisor_remote_move_to_tail(o, previous);
152 else
153 promisor_remote_new(repository_format_partial_clone);
154 }
155 }
156
157 static void promisor_remote_clear(void)
158 {
159 while (promisors) {
160 struct promisor_remote *r = promisors;
161 promisors = promisors->next;
162 free(r);
163 }
164
165 promisors_tail = &promisors;
166 }
167
168 void promisor_remote_reinit(void)
169 {
170 initialized = 0;
171 promisor_remote_clear();
172 promisor_remote_init();
173 }
174
175 struct promisor_remote *promisor_remote_find(const char *remote_name)
176 {
177 promisor_remote_init();
178
179 if (!remote_name)
180 return promisors;
181
182 return promisor_remote_lookup(remote_name, NULL);
183 }
184
185 int has_promisor_remote(void)
186 {
187 return !!promisor_remote_find(NULL);
188 }
189
190 static int remove_fetched_oids(struct repository *repo,
191 struct object_id **oids,
192 int oid_nr, int to_free)
193 {
194 int i, remaining_nr = 0;
195 int *remaining = xcalloc(oid_nr, sizeof(*remaining));
196 struct object_id *old_oids = *oids;
197 struct object_id *new_oids;
198
199 for (i = 0; i < oid_nr; i++)
200 if (oid_object_info_extended(repo, &old_oids[i], NULL,
201 OBJECT_INFO_SKIP_FETCH_OBJECT)) {
202 remaining[i] = 1;
203 remaining_nr++;
204 }
205
206 if (remaining_nr) {
207 int j = 0;
208 new_oids = xcalloc(remaining_nr, sizeof(*new_oids));
209 for (i = 0; i < oid_nr; i++)
210 if (remaining[i])
211 oidcpy(&new_oids[j++], &old_oids[i]);
212 *oids = new_oids;
213 if (to_free)
214 free(old_oids);
215 }
216
217 free(remaining);
218
219 return remaining_nr;
220 }
221
222 int promisor_remote_get_direct(struct repository *repo,
223 const struct object_id *oids,
224 int oid_nr)
225 {
226 struct promisor_remote *r;
227 struct object_id *remaining_oids = (struct object_id *)oids;
228 int remaining_nr = oid_nr;
229 int to_free = 0;
230 int res = -1;
231
232 promisor_remote_init();
233
234 for (r = promisors; r; r = r->next) {
235 if (fetch_objects(r->name, remaining_oids, remaining_nr) < 0) {
236 if (remaining_nr == 1)
237 continue;
238 remaining_nr = remove_fetched_oids(repo, &remaining_oids,
239 remaining_nr, to_free);
240 if (remaining_nr) {
241 to_free = 1;
242 continue;
243 }
244 }
245 res = 0;
246 break;
247 }
248
249 if (to_free)
250 free(remaining_oids);
251
252 return res;
253 }