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Commit | Line | Data |
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215a7ad1 | 1 | #include "fetch.h" |
4250a5e5 DB |
2 | |
3 | #include "cache.h" | |
4 | #include "commit.h" | |
5 | #include "tree.h" | |
3173bd49 DB |
6 | #include "tag.h" |
7 | #include "blob.h" | |
cd541a68 DB |
8 | #include "refs.h" |
9 | ||
10 | const char *write_ref = NULL; | |
11 | ||
12 | const unsigned char *current_ref = NULL; | |
4250a5e5 DB |
13 | |
14 | int get_tree = 0; | |
15 | int get_history = 0; | |
16 | int get_all = 0; | |
e78d9772 | 17 | int get_verbosely = 0; |
820eca68 | 18 | int get_recover = 0; |
b2d62f16 | 19 | static unsigned char current_commit_sha1[20]; |
4250a5e5 | 20 | |
1e8be59d DB |
21 | void pull_say(const char *fmt, const char *hex) |
22 | { | |
e78d9772 JH |
23 | if (get_verbosely) |
24 | fprintf(stderr, fmt, hex); | |
25 | } | |
26 | ||
b2d62f16 JH |
27 | static 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 | 37 | static int process(struct object *obj); |
3173bd49 | 38 | |
1e8be59d | 39 | static int process_tree(struct tree *tree) |
4250a5e5 | 40 | { |
85d106c2 | 41 | struct tree_entry_list *entry; |
4250a5e5 DB |
42 | |
43 | if (parse_tree(tree)) | |
44 | return -1; | |
45 | ||
85d106c2 JH |
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); |
85d106c2 JH |
53 | free(entry); |
54 | entry = next; | |
4250a5e5 DB |
55 | } |
56 | return 0; | |
57 | } | |
58 | ||
24451c31 SV |
59 | #define COMPLETE (1U << 0) |
60 | #define SEEN (1U << 1) | |
61 | #define TO_SCAN (1U << 2) | |
85d106c2 | 62 | |
d0ac30f2 | 63 | static struct commit_list *complete = NULL; |
22c6e1d0 | 64 | |
1e8be59d | 65 | static int process_commit(struct commit *commit) |
4250a5e5 | 66 | { |
1e8be59d | 67 | if (parse_commit(commit)) |
4250a5e5 DB |
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) |
22c6e1d0 DB |
75 | return 0; |
76 | ||
1e8be59d | 77 | memcpy(current_commit_sha1, commit->object.sha1, 20); |
4250a5e5 | 78 | |
85d106c2 JH |
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)) |
4250a5e5 DB |
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)) |
4250a5e5 DB |
91 | return -1; |
92 | } | |
93 | } | |
94 | return 0; | |
95 | } | |
96 | ||
1e8be59d | 97 | static int process_tag(struct tag *tag) |
3173bd49 | 98 | { |
1e8be59d | 99 | if (parse_tag(tag)) |
3173bd49 | 100 | return -1; |
80077f07 | 101 | return process(tag->tagged); |
3173bd49 DB |
102 | } |
103 | ||
1e8be59d DB |
104 | static struct object_list *process_queue = NULL; |
105 | static struct object_list **process_queue_end = &process_queue; | |
106 | ||
f88fcf8b | 107 | static int process_object(struct object *obj) |
3173bd49 | 108 | { |
f88fcf8b DB |
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; |
f88fcf8b DB |
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 | 132 | static int process(struct object *obj) |
f88fcf8b | 133 | { |
a82d07e5 SV |
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; |
7b64d06b SV |
141 | } else { |
142 | if (obj->flags & COMPLETE) | |
143 | return 0; | |
144 | prefetch(obj->sha1); | |
f88fcf8b | 145 | } |
7b64d06b | 146 | |
1e8be59d DB |
147 | object_list_insert(obj, process_queue_end); |
148 | process_queue_end = &(*process_queue_end)->next; | |
1e8be59d DB |
149 | return 0; |
150 | } | |
151 | ||
152 | static int loop(void) | |
153 | { | |
85d106c2 JH |
154 | struct object_list *elem; |
155 | ||
1e8be59d DB |
156 | while (process_queue) { |
157 | struct object *obj = process_queue->item; | |
85d106c2 JH |
158 | elem = process_queue; |
159 | process_queue = elem->next; | |
160 | free(elem); | |
1e8be59d DB |
161 | if (!process_queue) |
162 | process_queue_end = &process_queue; | |
163 | ||
85d106c2 JH |
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)) { |
85d106c2 JH |
169 | report_missing(obj->type |
170 | ? obj->type | |
171 | : "object", obj->sha1); | |
172 | return -1; | |
173 | } | |
174 | } | |
1e8be59d DB |
175 | if (!obj->type) |
176 | parse_object(obj->sha1); | |
f88fcf8b DB |
177 | if (process_object(obj)) |
178 | return -1; | |
1e8be59d DB |
179 | } |
180 | return 0; | |
3173bd49 DB |
181 | } |
182 | ||
cd541a68 DB |
183 | static 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 | ||
22c6e1d0 DB |
195 | static int mark_complete(const char *path, const unsigned char *sha1) |
196 | { | |
d0ac30f2 JH |
197 | struct commit *commit = lookup_commit_reference_gently(sha1, 1); |
198 | if (commit) { | |
199 | commit->object.flags |= COMPLETE; | |
200 | insert_by_date(commit, &complete); | |
22c6e1d0 DB |
201 | } |
202 | return 0; | |
203 | } | |
cd541a68 | 204 | |
4250a5e5 DB |
205 | int pull(char *target) |
206 | { | |
4250a5e5 | 207 | unsigned char sha1[20]; |
cd541a68 DB |
208 | int fd = -1; |
209 | ||
98533b90 | 210 | save_commit_buffer = 0; |
a95cb6fb | 211 | track_object_refs = 0; |
cd541a68 DB |
212 | if (write_ref && current_ref) { |
213 | fd = lock_ref_sha1(write_ref, current_ref); | |
214 | if (fd < 0) | |
215 | return -1; | |
216 | } | |
217 | ||
820eca68 DB |
218 | if (!get_recover) { |
219 | for_each_ref(mark_complete); | |
220 | } | |
22c6e1d0 | 221 | |
cd541a68 DB |
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))) |
1e8be59d DB |
226 | return -1; |
227 | if (loop()) | |
cd541a68 DB |
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 | } |