Do not give alarming error message from rsync in fetch and clone.
[git/git.git] / fetch.c
CommitLineData
215a7ad1 1#include "fetch.h"
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2
3#include "cache.h"
4#include "commit.h"
5#include "tree.h"
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6#include "tag.h"
7#include "blob.h"
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8#include "refs.h"
9
10const char *write_ref = NULL;
11
12const unsigned char *current_ref = NULL;
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13
14int get_tree = 0;
15int get_history = 0;
16int get_all = 0;
e78d9772 17int get_verbosely = 0;
b2d62f16 18static unsigned char current_commit_sha1[20];
4250a5e5 19
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20void pull_say(const char *fmt, const char *hex)
21{
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22 if (get_verbosely)
23 fprintf(stderr, fmt, hex);
24}
25
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26static void report_missing(const char *what, const unsigned char *missing)
27{
28 char missing_hex[41];
29
30 strcpy(missing_hex, sha1_to_hex(missing));;
31 fprintf(stderr,
32 "Cannot obtain needed %s %s\nwhile processing commit %s.\n",
33 what, missing_hex, sha1_to_hex(current_commit_sha1));
34}
35
1e8be59d 36static int process(unsigned char *sha1, const char *type);
3173bd49 37
1e8be59d 38static int process_tree(struct tree *tree)
4250a5e5 39{
85d106c2 40 struct tree_entry_list *entry;
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41
42 if (parse_tree(tree))
43 return -1;
44
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45 entry = tree->entries;
46 tree->entries = NULL;
47 while (entry) {
48 struct tree_entry_list *next = entry->next;
49 if (process(entry->item.any->sha1,
50 entry->directory ? tree_type : blob_type))
4250a5e5 51 return -1;
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52 free(entry);
53 entry = next;
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54 }
55 return 0;
56}
57
d0ac30f2 58#define COMPLETE 1U
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59#define TO_FETCH 2U
60#define TO_SCAN 4U
61#define SCANNED 8U
62
d0ac30f2 63static struct commit_list *complete = NULL;
22c6e1d0 64
1e8be59d 65static int process_commit(struct commit *commit)
4250a5e5 66{
1e8be59d 67 if (parse_commit(commit))
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68 return -1;
69
22c6e1d0 70 while (complete && complete->item->date >= commit->date) {
d0ac30f2 71 pop_most_recent_commit(&complete, COMPLETE);
22c6e1d0 72 }
22c6e1d0 73
d0ac30f2 74 if (commit->object.flags & COMPLETE)
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75 return 0;
76
1e8be59d 77 memcpy(current_commit_sha1, commit->object.sha1, 20);
4250a5e5 78
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79 pull_say("walk %s\n", sha1_to_hex(commit->object.sha1));
80
4250a5e5 81 if (get_tree) {
1e8be59d 82 if (process(commit->tree->object.sha1, tree_type))
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83 return -1;
84 if (!get_all)
85 get_tree = 0;
86 }
87 if (get_history) {
1e8be59d 88 struct commit_list *parents = commit->parents;
4250a5e5 89 for (; parents; parents = parents->next) {
85d106c2 90 if (process(parents->item->object.sha1, commit_type))
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91 return -1;
92 }
93 }
94 return 0;
95}
96
1e8be59d 97static int process_tag(struct tag *tag)
3173bd49 98{
1e8be59d 99 if (parse_tag(tag))
3173bd49 100 return -1;
1e8be59d 101 return process(tag->tagged->sha1, NULL);
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102}
103
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104static struct object_list *process_queue = NULL;
105static struct object_list **process_queue_end = &process_queue;
106
f88fcf8b 107static int process_object(struct object *obj)
3173bd49 108{
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109 if (obj->flags & SCANNED)
110 return 0;
111 obj->flags |= SCANNED;
112
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113 if (obj->type == commit_type) {
114 if (process_commit((struct commit *)obj))
115 return -1;
116 return 0;
117 }
118 if (obj->type == tree_type) {
119 if (process_tree((struct tree *)obj))
120 return -1;
121 return 0;
122 }
123 if (obj->type == blob_type) {
124 return 0;
125 }
126 if (obj->type == tag_type) {
127 if (process_tag((struct tag *)obj))
128 return -1;
3173bd49 129 return 0;
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130 }
131 return error("Unable to determine requirements "
132 "of type %s for %s",
133 obj->type, sha1_to_hex(obj->sha1));
134}
135
136static int process(unsigned char *sha1, const char *type)
137{
138 struct object *obj = lookup_object_type(sha1, type);
22c6e1d0 139
f88fcf8b 140 if (has_sha1_file(sha1)) {
0d62fb56 141 parse_object(sha1);
f88fcf8b 142 /* We already have it, so we should scan it now. */
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143 if (obj->flags & (SCANNED | TO_SCAN))
144 return 0;
145 object_list_insert(obj, process_queue_end);
146 process_queue_end = &(*process_queue_end)->next;
147 obj->flags |= TO_SCAN;
148 return 0;
f88fcf8b 149 }
85d106c2 150 if (obj->flags & (COMPLETE | TO_FETCH))
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151 return 0;
152 object_list_insert(obj, process_queue_end);
153 process_queue_end = &(*process_queue_end)->next;
85d106c2 154 obj->flags |= TO_FETCH;
1e8be59d 155
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156 prefetch(sha1);
157
158 return 0;
159}
160
161static int loop(void)
162{
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163 struct object_list *elem;
164
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165 while (process_queue) {
166 struct object *obj = process_queue->item;
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167 elem = process_queue;
168 process_queue = elem->next;
169 free(elem);
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170 if (!process_queue)
171 process_queue_end = &process_queue;
172
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173 /* If we are not scanning this object, we placed it in
174 * the queue because we needed to fetch it first.
175 */
176 if (! (obj->flags & TO_SCAN)) {
029f6de3 177 if (!has_sha1_file(obj->sha1) && fetch(obj->sha1)) {
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178 report_missing(obj->type
179 ? obj->type
180 : "object", obj->sha1);
181 return -1;
182 }
183 }
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184 if (!obj->type)
185 parse_object(obj->sha1);
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186 if (process_object(obj))
187 return -1;
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188 }
189 return 0;
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190}
191
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192static int interpret_target(char *target, unsigned char *sha1)
193{
194 if (!get_sha1_hex(target, sha1))
195 return 0;
196 if (!check_ref_format(target)) {
197 if (!fetch_ref(target, sha1)) {
198 return 0;
199 }
200 }
201 return -1;
202}
203
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204static int mark_complete(const char *path, const unsigned char *sha1)
205{
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206 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
207 if (commit) {
208 commit->object.flags |= COMPLETE;
209 insert_by_date(commit, &complete);
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210 }
211 return 0;
212}
cd541a68 213
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214int pull(char *target)
215{
4250a5e5 216 unsigned char sha1[20];
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217 int fd = -1;
218
98533b90 219 save_commit_buffer = 0;
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220 if (write_ref && current_ref) {
221 fd = lock_ref_sha1(write_ref, current_ref);
222 if (fd < 0)
223 return -1;
224 }
225
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226 for_each_ref(mark_complete);
227
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228 if (interpret_target(target, sha1))
229 return error("Could not interpret %s as something to pull",
230 target);
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231 if (process(sha1, NULL))
232 return -1;
233 if (loop())
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234 return -1;
235
236 if (write_ref) {
237 if (current_ref) {
238 write_ref_sha1(write_ref, fd, sha1);
239 } else {
240 write_ref_sha1_unlocked(write_ref, sha1);
241 }
242 }
243 return 0;
4250a5e5 244}