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chromium / external / github.com / git / git / refs/tags/v0.99.6 / . / pull.c
blob: ff550441e92339bd5c6fa70d8891ab208410a03e [file] [log] [blame]
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]1#include "pull.h"
2
3#include "cache.h"
4#include "commit.h"
5#include "tree.h"
Daniel Barkalow3173bd42005-06-22 00:35:53[diff] [blame]6#include "tag.h"
7#include "blob.h"
Daniel Barkalowcd541a62005-06-06 20:38:26[diff] [blame]8#include "refs.h"
9
10const char *write_ref = NULL;
11
12const unsigned char *current_ref = NULL;
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]13
14int get_tree = 0;
15int get_history = 0;
16int get_all = 0;
Junio C Hamanoe78d9772005-05-06 08:37:21[diff] [blame]17int get_verbosely = 0;
Junio C Hamanob2d62f12005-05-04 08:26:24[diff] [blame]18static unsigned char current_commit_sha1[20];
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]19
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]20void pull_say(const char *fmt, const char *hex)
21{
Junio C Hamanoe78d9772005-05-06 08:37:21[diff] [blame]22 if (get_verbosely)
23 fprintf(stderr, fmt, hex);
24}
25
Junio C Hamanob2d62f12005-05-04 08:26:24[diff] [blame]26static void report_missing(const char *what, const unsigned char *missing)
Junio C Hamanoee4f4392005-05-02 04:07:40[diff] [blame]27{
Junio C Hamanob2d62f12005-05-04 08:26:24[diff] [blame]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
36static int make_sure_we_have_it(const char *what, unsigned char *sha1)
37{
Junio C Hamanoa48e1d62005-06-05 06:11:38[diff] [blame]38 int status = 0;
39
40 if (!has_sha1_file(sha1)) {
41 status = fetch(sha1);
42 if (status && what)
43 report_missing(what, sha1);
44 }
Junio C Hamanob2d62f12005-05-04 08:26:24[diff] [blame]45 return status;
Junio C Hamanoee4f4392005-05-02 04:07:40[diff] [blame]46}
47
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]48static int process(unsigned char *sha1, const char *type);
Daniel Barkalow3173bd42005-06-22 00:35:53[diff] [blame]49
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]50static int process_tree(struct tree *tree)
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]51{
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]52 struct tree_entry_list *entries;
53
54 if (parse_tree(tree))
55 return -1;
56
57 for (entries = tree->entries; entries; entries = entries->next) {
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]58 if (process(entries->item.any->sha1,
59 entries->directory ? tree_type : blob_type))
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]60 return -1;
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]61 }
62 return 0;
63}
64
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]65static int process_commit(struct commit *commit)
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]66{
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]67 if (parse_commit(commit))
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]68 return -1;
69
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]70 memcpy(current_commit_sha1, commit->object.sha1, 20);
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]71
72 if (get_tree) {
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]73 if (process(commit->tree->object.sha1, tree_type))
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]74 return -1;
75 if (!get_all)
76 get_tree = 0;
77 }
78 if (get_history) {
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]79 struct commit_list *parents = commit->parents;
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]80 for (; parents; parents = parents->next) {
81 if (has_sha1_file(parents->item->object.sha1))
82 continue;
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]83 if (process(parents->item->object.sha1,
84 commit_type))
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]85 return -1;
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]86 }
87 }
88 return 0;
89}
90
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]91static int process_tag(struct tag *tag)
Daniel Barkalow3173bd42005-06-22 00:35:53[diff] [blame]92{
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]93 if (parse_tag(tag))
Daniel Barkalow3173bd42005-06-22 00:35:53[diff] [blame]94 return -1;
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]95 return process(tag->tagged->sha1, NULL);
Daniel Barkalow3173bd42005-06-22 00:35:53[diff] [blame]96}
97
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]98static struct object_list *process_queue = NULL;
99static struct object_list **process_queue_end = &process_queue;
100
Daniel Barkalowf88fcf82005-08-11 23:38:09[diff] [blame]101static int process_object(struct object *obj)
102{
103 if (obj->type == commit_type) {
104 if (process_commit((struct commit *)obj))
105 return -1;
106 return 0;
107 }
108 if (obj->type == tree_type) {
109 if (process_tree((struct tree *)obj))
110 return -1;
111 return 0;
112 }
113 if (obj->type == blob_type) {
114 return 0;
115 }
116 if (obj->type == tag_type) {
117 if (process_tag((struct tag *)obj))
118 return -1;
119 return 0;
120 }
121 return error("Unable to determine requirements "
122 "of type %s for %s",
123 obj->type, sha1_to_hex(obj->sha1));
124}
125
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]126static int process(unsigned char *sha1, const char *type)
Daniel Barkalow3173bd42005-06-22 00:35:53[diff] [blame]127{
Daniel Barkalowf88fcf82005-08-11 23:38:09[diff] [blame]128 struct object *obj = lookup_object_type(sha1, type);
129 if (has_sha1_file(sha1)) {
Daniel Barkalow0d62fb52005-08-12 03:17:55[diff] [blame]130 parse_object(sha1);
Daniel Barkalowf88fcf82005-08-11 23:38:09[diff] [blame]131 /* We already have it, so we should scan it now. */
132 return process_object(obj);
133 }
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]134 if (object_list_contains(process_queue, obj))
135 return 0;
136 object_list_insert(obj, process_queue_end);
137 process_queue_end = &(*process_queue_end)->next;
138
139 //fprintf(stderr, "prefetch %s\n", sha1_to_hex(sha1));
140 prefetch(sha1);
141
142 return 0;
143}
144
145static int loop(void)
146{
147 while (process_queue) {
148 struct object *obj = process_queue->item;
149 /*
150 fprintf(stderr, "%d objects to pull\n",
151 object_list_length(process_queue));
152 */
153 process_queue = process_queue->next;
154 if (!process_queue)
155 process_queue_end = &process_queue;
156
157 //fprintf(stderr, "fetch %s\n", sha1_to_hex(obj->sha1));
158
Jason Riedyc7c81b32005-08-23 20:34:07[diff] [blame]159 if (make_sure_we_have_it(obj->type ? obj->type : "object",
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]160 obj->sha1))
161 return -1;
162 if (!obj->type)
163 parse_object(obj->sha1);
Daniel Barkalowf88fcf82005-08-11 23:38:09[diff] [blame]164 if (process_object(obj))
165 return -1;
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]166 }
167 return 0;
Daniel Barkalow3173bd42005-06-22 00:35:53[diff] [blame]168}
169
Daniel Barkalowcd541a62005-06-06 20:38:26[diff] [blame]170static int interpret_target(char *target, unsigned char *sha1)
171{
172 if (!get_sha1_hex(target, sha1))
173 return 0;
174 if (!check_ref_format(target)) {
175 if (!fetch_ref(target, sha1)) {
176 return 0;
177 }
178 }
179 return -1;
180}
181
182
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]183int pull(char *target)
184{
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]185 unsigned char sha1[20];
Daniel Barkalowcd541a62005-06-06 20:38:26[diff] [blame]186 int fd = -1;
187
188 if (write_ref && current_ref) {
189 fd = lock_ref_sha1(write_ref, current_ref);
190 if (fd < 0)
191 return -1;
192 }
193
194 if (interpret_target(target, sha1))
195 return error("Could not interpret %s as something to pull",
196 target);
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]197 if (process(sha1, NULL))
198 return -1;
199 if (loop())
Daniel Barkalowcd541a62005-06-06 20:38:26[diff] [blame]200 return -1;
201
202 if (write_ref) {
203 if (current_ref) {
204 write_ref_sha1(write_ref, fd, sha1);
205 } else {
206 write_ref_sha1_unlocked(write_ref, sha1);
207 }
208 }
209 return 0;
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]210}