763d98aedd85d69fc393b172ccfd8e4d8c0d75dd
[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 "fetch-object.h"
6
7 static struct promisor_remote *promisors;
8 static struct promisor_remote **promisors_tail = &promisors;
9
10 static struct promisor_remote *promisor_remote_new(const char *remote_name)
11 {
12 struct promisor_remote *r;
13
14 if (*remote_name == '/') {
15 warning(_("promisor remote name cannot begin with '/': %s"),
16 remote_name);
17 return NULL;
18 }
19
20 FLEX_ALLOC_STR(r, name, remote_name);
21
22 *promisors_tail = r;
23 promisors_tail = &r->next;
24
25 return r;
26 }
27
28 static struct promisor_remote *promisor_remote_lookup(const char *remote_name,
29 struct promisor_remote **previous)
30 {
31 struct promisor_remote *r, *p;
32
33 for (p = NULL, r = promisors; r; p = r, r = r->next)
34 if (!strcmp(r->name, remote_name)) {
35 if (previous)
36 *previous = p;
37 return r;
38 }
39
40 return NULL;
41 }
42
43 static int promisor_remote_config(const char *var, const char *value, void *data)
44 {
45 const char *name;
46 int namelen;
47 const char *subkey;
48
49 if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
50 return 0;
51
52 if (!strcmp(subkey, "promisor")) {
53 char *remote_name;
54
55 if (!git_config_bool(var, value))
56 return 0;
57
58 remote_name = xmemdupz(name, namelen);
59
60 if (!promisor_remote_lookup(remote_name, NULL))
61 promisor_remote_new(remote_name);
62
63 free(remote_name);
64 return 0;
65 }
66
67 return 0;
68 }
69
70 static int initialized;
71
72 static void promisor_remote_init(void)
73 {
74 if (initialized)
75 return;
76 initialized = 1;
77
78 git_config(promisor_remote_config, NULL);
79 }
80
81 static void promisor_remote_clear(void)
82 {
83 while (promisors) {
84 struct promisor_remote *r = promisors;
85 promisors = promisors->next;
86 free(r);
87 }
88
89 promisors_tail = &promisors;
90 }
91
92 void promisor_remote_reinit(void)
93 {
94 initialized = 0;
95 promisor_remote_clear();
96 promisor_remote_init();
97 }
98
99 struct promisor_remote *promisor_remote_find(const char *remote_name)
100 {
101 promisor_remote_init();
102
103 if (!remote_name)
104 return promisors;
105
106 return promisor_remote_lookup(remote_name, NULL);
107 }
108
109 int has_promisor_remote(void)
110 {
111 return !!promisor_remote_find(NULL);
112 }
113
114 static int remove_fetched_oids(struct repository *repo,
115 struct object_id **oids,
116 int oid_nr, int to_free)
117 {
118 int i, remaining_nr = 0;
119 int *remaining = xcalloc(oid_nr, sizeof(*remaining));
120 struct object_id *old_oids = *oids;
121 struct object_id *new_oids;
122
123 for (i = 0; i < oid_nr; i++)
124 if (oid_object_info_extended(repo, &old_oids[i], NULL,
125 OBJECT_INFO_SKIP_FETCH_OBJECT)) {
126 remaining[i] = 1;
127 remaining_nr++;
128 }
129
130 if (remaining_nr) {
131 int j = 0;
132 new_oids = xcalloc(remaining_nr, sizeof(*new_oids));
133 for (i = 0; i < oid_nr; i++)
134 if (remaining[i])
135 oidcpy(&new_oids[j++], &old_oids[i]);
136 *oids = new_oids;
137 if (to_free)
138 free(old_oids);
139 }
140
141 free(remaining);
142
143 return remaining_nr;
144 }
145
146 int promisor_remote_get_direct(struct repository *repo,
147 const struct object_id *oids,
148 int oid_nr)
149 {
150 struct promisor_remote *r;
151 struct object_id *remaining_oids = (struct object_id *)oids;
152 int remaining_nr = oid_nr;
153 int to_free = 0;
154 int res = -1;
155
156 promisor_remote_init();
157
158 for (r = promisors; r; r = r->next) {
159 if (fetch_objects(r->name, remaining_oids, remaining_nr) < 0) {
160 if (remaining_nr == 1)
161 continue;
162 remaining_nr = remove_fetched_oids(repo, &remaining_oids,
163 remaining_nr, to_free);
164 if (remaining_nr) {
165 to_free = 1;
166 continue;
167 }
168 }
169 res = 0;
170 break;
171 }
172
173 if (to_free)
174 free(remaining_oids);
175
176 return res;
177 }