[PATCH] Add -m <message> option to "git tag"
[alt-git.git] / pull.c
blob950d9f47bd03516ec9e25bfc6742f8582a4197ab
1 #include "pull.h"
3 #include "cache.h"
4 #include "commit.h"
5 #include "tree.h"
6 #include "tag.h"
7 #include "blob.h"
8 #include "refs.h"
10 const char *write_ref = NULL;
12 const unsigned char *current_ref = NULL;
14 int get_tree = 0;
15 int get_history = 0;
16 int get_all = 0;
17 int get_verbosely = 0;
18 static unsigned char current_commit_sha1[20];
20 void pull_say(const char *fmt, const char *hex)
22 if (get_verbosely)
23 fprintf(stderr, fmt, hex);
26 static void report_missing(const char *what, const unsigned char *missing)
28 char missing_hex[41];
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));
36 static int make_sure_we_have_it(const char *what, unsigned char *sha1)
38 int status = 0;
40 if (!has_sha1_file(sha1)) {
41 status = fetch(sha1);
42 if (status && what)
43 report_missing(what, sha1);
45 return status;
48 static int process(unsigned char *sha1, const char *type);
50 static int process_tree(struct tree *tree)
52 struct tree_entry_list *entries;
54 if (parse_tree(tree))
55 return -1;
57 for (entries = tree->entries; entries; entries = entries->next) {
58 if (process(entries->item.any->sha1,
59 entries->directory ? tree_type : blob_type))
60 return -1;
62 return 0;
65 static int process_commit(struct commit *commit)
67 if (parse_commit(commit))
68 return -1;
70 memcpy(current_commit_sha1, commit->object.sha1, 20);
72 if (get_tree) {
73 if (process(commit->tree->object.sha1, tree_type))
74 return -1;
75 if (!get_all)
76 get_tree = 0;
78 if (get_history) {
79 struct commit_list *parents = commit->parents;
80 for (; parents; parents = parents->next) {
81 if (has_sha1_file(parents->item->object.sha1))
82 continue;
83 if (process(parents->item->object.sha1,
84 commit_type))
85 return -1;
88 return 0;
91 static int process_tag(struct tag *tag)
93 if (parse_tag(tag))
94 return -1;
95 return process(tag->tagged->sha1, NULL);
98 static struct object_list *process_queue = NULL;
99 static struct object_list **process_queue_end = &process_queue;
101 static int process(unsigned char *sha1, const char *type)
103 struct object *obj;
104 if (has_sha1_file(sha1))
105 return 0;
106 obj = lookup_object_type(sha1, type);
107 if (object_list_contains(process_queue, obj))
108 return 0;
109 object_list_insert(obj, process_queue_end);
110 process_queue_end = &(*process_queue_end)->next;
112 //fprintf(stderr, "prefetch %s\n", sha1_to_hex(sha1));
113 prefetch(sha1);
115 return 0;
118 static int loop(void)
120 while (process_queue) {
121 struct object *obj = process_queue->item;
123 fprintf(stderr, "%d objects to pull\n",
124 object_list_length(process_queue));
126 process_queue = process_queue->next;
127 if (!process_queue)
128 process_queue_end = &process_queue;
130 //fprintf(stderr, "fetch %s\n", sha1_to_hex(obj->sha1));
132 if (make_sure_we_have_it(obj->type ?: "object",
133 obj->sha1))
134 return -1;
135 if (!obj->type)
136 parse_object(obj->sha1);
137 if (obj->type == commit_type) {
138 if (process_commit((struct commit *)obj))
139 return -1;
140 continue;
142 if (obj->type == tree_type) {
143 if (process_tree((struct tree *)obj))
144 return -1;
145 continue;
147 if (obj->type == blob_type) {
148 continue;
150 if (obj->type == tag_type) {
151 if (process_tag((struct tag *)obj))
152 return -1;
153 continue;
155 return error("Unable to determine requirements "
156 "of type %s for %s",
157 obj->type, sha1_to_hex(obj->sha1));
159 return 0;
162 static int interpret_target(char *target, unsigned char *sha1)
164 if (!get_sha1_hex(target, sha1))
165 return 0;
166 if (!check_ref_format(target)) {
167 if (!fetch_ref(target, sha1)) {
168 return 0;
171 return -1;
175 int pull(char *target)
177 unsigned char sha1[20];
178 int fd = -1;
180 if (write_ref && current_ref) {
181 fd = lock_ref_sha1(write_ref, current_ref);
182 if (fd < 0)
183 return -1;
186 if (interpret_target(target, sha1))
187 return error("Could not interpret %s as something to pull",
188 target);
189 if (process(sha1, NULL))
190 return -1;
191 if (loop())
192 return -1;
194 if (write_ref) {
195 if (current_ref) {
196 write_ref_sha1(write_ref, fd, sha1);
197 } else {
198 write_ref_sha1_unlocked(write_ref, sha1);
201 return 0;