promisor-remote: parse remote.*.partialclonefilter
[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 void promisor_remote_move_to_tail(struct promisor_remote *r,
44 struct promisor_remote *previous)
45 {
46 if (previous)
47 previous->next = r->next;
48 else
49 promisors = r->next ? r->next : r;
50 r->next = NULL;
51 *promisors_tail = r;
52 promisors_tail = &r->next;
53 }
54
55 static int promisor_remote_config(const char *var, const char *value, void *data)
56 {
57 const char *name;
58 int namelen;
59 const char *subkey;
60
61 if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
62 return 0;
63
64 if (!strcmp(subkey, "promisor")) {
65 char *remote_name;
66
67 if (!git_config_bool(var, value))
68 return 0;
69
70 remote_name = xmemdupz(name, namelen);
71
72 if (!promisor_remote_lookup(remote_name, NULL))
73 promisor_remote_new(remote_name);
74
75 free(remote_name);
76 return 0;
77 }
78 if (!strcmp(subkey, "partialclonefilter")) {
79 struct promisor_remote *r;
80 char *remote_name = xmemdupz(name, namelen);
81
82 r = promisor_remote_lookup(remote_name, NULL);
83 if (!r)
84 r = promisor_remote_new(remote_name);
85
86 free(remote_name);
87
88 if (!r)
89 return 0;
90
91 return git_config_string(&r->partial_clone_filter, var, value);
92 }
93
94 return 0;
95 }
96
97 static int initialized;
98
99 static void promisor_remote_init(void)
100 {
101 if (initialized)
102 return;
103 initialized = 1;
104
105 git_config(promisor_remote_config, NULL);
106
107 if (repository_format_partial_clone) {
108 struct promisor_remote *o, *previous;
109
110 o = promisor_remote_lookup(repository_format_partial_clone,
111 &previous);
112 if (o)
113 promisor_remote_move_to_tail(o, previous);
114 else
115 promisor_remote_new(repository_format_partial_clone);
116 }
117 }
118
119 static void promisor_remote_clear(void)
120 {
121 while (promisors) {
122 struct promisor_remote *r = promisors;
123 promisors = promisors->next;
124 free(r);
125 }
126
127 promisors_tail = &promisors;
128 }
129
130 void promisor_remote_reinit(void)
131 {
132 initialized = 0;
133 promisor_remote_clear();
134 promisor_remote_init();
135 }
136
137 struct promisor_remote *promisor_remote_find(const char *remote_name)
138 {
139 promisor_remote_init();
140
141 if (!remote_name)
142 return promisors;
143
144 return promisor_remote_lookup(remote_name, NULL);
145 }
146
147 int has_promisor_remote(void)
148 {
149 return !!promisor_remote_find(NULL);
150 }
151
152 static int remove_fetched_oids(struct repository *repo,
153 struct object_id **oids,
154 int oid_nr, int to_free)
155 {
156 int i, remaining_nr = 0;
157 int *remaining = xcalloc(oid_nr, sizeof(*remaining));
158 struct object_id *old_oids = *oids;
159 struct object_id *new_oids;
160
161 for (i = 0; i < oid_nr; i++)
162 if (oid_object_info_extended(repo, &old_oids[i], NULL,
163 OBJECT_INFO_SKIP_FETCH_OBJECT)) {
164 remaining[i] = 1;
165 remaining_nr++;
166 }
167
168 if (remaining_nr) {
169 int j = 0;
170 new_oids = xcalloc(remaining_nr, sizeof(*new_oids));
171 for (i = 0; i < oid_nr; i++)
172 if (remaining[i])
173 oidcpy(&new_oids[j++], &old_oids[i]);
174 *oids = new_oids;
175 if (to_free)
176 free(old_oids);
177 }
178
179 free(remaining);
180
181 return remaining_nr;
182 }
183
184 int promisor_remote_get_direct(struct repository *repo,
185 const struct object_id *oids,
186 int oid_nr)
187 {
188 struct promisor_remote *r;
189 struct object_id *remaining_oids = (struct object_id *)oids;
190 int remaining_nr = oid_nr;
191 int to_free = 0;
192 int res = -1;
193
194 promisor_remote_init();
195
196 for (r = promisors; r; r = r->next) {
197 if (fetch_objects(r->name, remaining_oids, remaining_nr) < 0) {
198 if (remaining_nr == 1)
199 continue;
200 remaining_nr = remove_fetched_oids(repo, &remaining_oids,
201 remaining_nr, to_free);
202 if (remaining_nr) {
203 to_free = 1;
204 continue;
205 }
206 }
207 res = 0;
208 break;
209 }
210
211 if (to_free)
212 free(remaining_oids);
213
214 return res;
215 }