Merge branch 'ah/doc-submodule-ignore-submodules'
[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 (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 }