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
set_repository_format_partial_clone(char * partial_clone)10 void set_repository_format_partial_clone(char *partial_clone)
11 {
12 repository_format_partial_clone = xstrdup_or_null(partial_clone);
13 }
14
fetch_refs(const char * remote_name,struct ref * ref)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
fetch_objects(const char * remote_name,const struct object_id * oids,int oid_nr)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
promisor_remote_new(const char * remote_name)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
promisor_remote_lookup(const char * remote_name,struct promisor_remote ** previous)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
promisor_remote_move_to_tail(struct promisor_remote * r,struct promisor_remote * previous)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
promisor_remote_config(const char * var,const char * value,void * data)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
promisor_remote_init(void)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
promisor_remote_clear(void)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
promisor_remote_reinit(void)180 void promisor_remote_reinit(void)
181 {
182 initialized = 0;
183 promisor_remote_clear();
184 promisor_remote_init();
185 }
186
promisor_remote_find(const char * remote_name)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
has_promisor_remote(void)197 int has_promisor_remote(void)
198 {
199 return !!promisor_remote_find(NULL);
200 }
201
remove_fetched_oids(struct repository * repo,struct object_id ** oids,int oid_nr,int to_free)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
promisor_remote_get_direct(struct repository * repo,const struct object_id * oids,int oid_nr)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 }
266