promisor-remote: implement promisor_remote_get_direct()
[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 void promisor_remote_init(void)
71 {
72 static int initialized;
73
74 if (initialized)
75 return;
76 initialized = 1;
77
78 git_config(promisor_remote_config, NULL);
79 }
80
81 struct promisor_remote *promisor_remote_find(const char *remote_name)
82 {
83 promisor_remote_init();
84
85 if (!remote_name)
86 return promisors;
87
88 return promisor_remote_lookup(remote_name, NULL);
89 }
90
91 int has_promisor_remote(void)
92 {
93 return !!promisor_remote_find(NULL);
94 }
95
96 static int remove_fetched_oids(struct repository *repo,
97 struct object_id **oids,
98 int oid_nr, int to_free)
99 {
100 int i, remaining_nr = 0;
101 int *remaining = xcalloc(oid_nr, sizeof(*remaining));
102 struct object_id *old_oids = *oids;
103 struct object_id *new_oids;
104
105 for (i = 0; i < oid_nr; i++)
106 if (oid_object_info_extended(repo, &old_oids[i], NULL,
107 OBJECT_INFO_SKIP_FETCH_OBJECT)) {
108 remaining[i] = 1;
109 remaining_nr++;
110 }
111
112 if (remaining_nr) {
113 int j = 0;
114 new_oids = xcalloc(remaining_nr, sizeof(*new_oids));
115 for (i = 0; i < oid_nr; i++)
116 if (remaining[i])
117 oidcpy(&new_oids[j++], &old_oids[i]);
118 *oids = new_oids;
119 if (to_free)
120 free(old_oids);
121 }
122
123 free(remaining);
124
125 return remaining_nr;
126 }
127
128 int promisor_remote_get_direct(struct repository *repo,
129 const struct object_id *oids,
130 int oid_nr)
131 {
132 struct promisor_remote *r;
133 struct object_id *remaining_oids = (struct object_id *)oids;
134 int remaining_nr = oid_nr;
135 int to_free = 0;
136 int res = -1;
137
138 promisor_remote_init();
139
140 for (r = promisors; r; r = r->next) {
141 if (fetch_objects(r->name, remaining_oids, remaining_nr) < 0) {
142 if (remaining_nr == 1)
143 continue;
144 remaining_nr = remove_fetched_oids(repo, &remaining_oids,
145 remaining_nr, to_free);
146 if (remaining_nr) {
147 to_free = 1;
148 continue;
149 }
150 }
151 res = 0;
152 break;
153 }
154
155 if (to_free)
156 free(remaining_oids);
157
158 return res;
159 }