Remove unnecessary local in get_ref_sha1.
[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;
820eca68 18int get_recover = 0;
b2d62f16 19static unsigned char current_commit_sha1[20];
4250a5e5 20
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21void pull_say(const char *fmt, const char *hex)
22{
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23 if (get_verbosely)
24 fprintf(stderr, fmt, hex);
25}
26
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27static void report_missing(const char *what, const unsigned char *missing)
28{
29 char missing_hex[41];
30
31 strcpy(missing_hex, sha1_to_hex(missing));;
32 fprintf(stderr,
33 "Cannot obtain needed %s %s\nwhile processing commit %s.\n",
34 what, missing_hex, sha1_to_hex(current_commit_sha1));
35}
36
80077f07 37static int process(struct object *obj);
3173bd49 38
1e8be59d 39static int process_tree(struct tree *tree)
4250a5e5 40{
85d106c2 41 struct tree_entry_list *entry;
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42
43 if (parse_tree(tree))
44 return -1;
45
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46 entry = tree->entries;
47 tree->entries = NULL;
48 while (entry) {
49 struct tree_entry_list *next = entry->next;
80077f07 50 if (process(entry->item.any))
4250a5e5 51 return -1;
d35bbe0b 52 free(entry->name);
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53 free(entry);
54 entry = next;
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55 }
56 return 0;
57}
58
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59#define COMPLETE (1U << 0)
60#define SEEN (1U << 1)
61#define TO_SCAN (1U << 2)
85d106c2 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) {
80077f07 82 if (process(&commit->tree->object))
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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) {
80077f07 90 if (process(&parents->item->object))
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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;
80077f07 101 return process(tag->tagged);
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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->type == commit_type) {
110 if (process_commit((struct commit *)obj))
111 return -1;
112 return 0;
113 }
114 if (obj->type == tree_type) {
115 if (process_tree((struct tree *)obj))
116 return -1;
117 return 0;
118 }
119 if (obj->type == blob_type) {
120 return 0;
121 }
122 if (obj->type == tag_type) {
123 if (process_tag((struct tag *)obj))
124 return -1;
3173bd49 125 return 0;
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126 }
127 return error("Unable to determine requirements "
128 "of type %s for %s",
129 obj->type, sha1_to_hex(obj->sha1));
130}
131
80077f07 132static int process(struct object *obj)
f88fcf8b 133{
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134 if (obj->flags & SEEN)
135 return 0;
136 obj->flags |= SEEN;
137
80077f07 138 if (has_sha1_file(obj->sha1)) {
f88fcf8b 139 /* We already have it, so we should scan it now. */
85d106c2 140 obj->flags |= TO_SCAN;
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141 } else {
142 if (obj->flags & COMPLETE)
143 return 0;
144 prefetch(obj->sha1);
f88fcf8b 145 }
7b64d06b 146
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147 object_list_insert(obj, process_queue_end);
148 process_queue_end = &(*process_queue_end)->next;
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149 return 0;
150}
151
152static int loop(void)
153{
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154 struct object_list *elem;
155
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156 while (process_queue) {
157 struct object *obj = process_queue->item;
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158 elem = process_queue;
159 process_queue = elem->next;
160 free(elem);
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161 if (!process_queue)
162 process_queue_end = &process_queue;
163
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164 /* If we are not scanning this object, we placed it in
165 * the queue because we needed to fetch it first.
166 */
167 if (! (obj->flags & TO_SCAN)) {
11f0dafe 168 if (fetch(obj->sha1)) {
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169 report_missing(obj->type
170 ? obj->type
171 : "object", obj->sha1);
172 return -1;
173 }
174 }
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175 if (!obj->type)
176 parse_object(obj->sha1);
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177 if (process_object(obj))
178 return -1;
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179 }
180 return 0;
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181}
182
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183static int interpret_target(char *target, unsigned char *sha1)
184{
185 if (!get_sha1_hex(target, sha1))
186 return 0;
187 if (!check_ref_format(target)) {
188 if (!fetch_ref(target, sha1)) {
189 return 0;
190 }
191 }
192 return -1;
193}
194
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195static int mark_complete(const char *path, const unsigned char *sha1)
196{
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197 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
198 if (commit) {
199 commit->object.flags |= COMPLETE;
200 insert_by_date(commit, &complete);
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201 }
202 return 0;
203}
cd541a68 204
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205int pull(char *target)
206{
4250a5e5 207 unsigned char sha1[20];
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208 int fd = -1;
209
98533b90 210 save_commit_buffer = 0;
a95cb6fb 211 track_object_refs = 0;
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212 if (write_ref && current_ref) {
213 fd = lock_ref_sha1(write_ref, current_ref);
214 if (fd < 0)
215 return -1;
216 }
217
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218 if (!get_recover) {
219 for_each_ref(mark_complete);
220 }
22c6e1d0 221
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222 if (interpret_target(target, sha1))
223 return error("Could not interpret %s as something to pull",
224 target);
80077f07 225 if (process(lookup_unknown_object(sha1)))
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226 return -1;
227 if (loop())
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228 return -1;
229
230 if (write_ref) {
231 if (current_ref) {
232 write_ref_sha1(write_ref, fd, sha1);
233 } else {
234 write_ref_sha1_unlocked(write_ref, sha1);
235 }
236 }
237 return 0;
4250a5e5 238}