[PATCH] Use '-d' as the first flag to 'install'
[alt-git.git] / fetch.c
blobe874538ccc14c58dfaa279d8957d309037a6c388
1 #include "fetch.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_object(struct object *obj)
103 if (obj->type == commit_type) {
104 if (process_commit((struct commit *)obj))
105 return -1;
106 return 0;
108 if (obj->type == tree_type) {
109 if (process_tree((struct tree *)obj))
110 return -1;
111 return 0;
113 if (obj->type == blob_type) {
114 return 0;
116 if (obj->type == tag_type) {
117 if (process_tag((struct tag *)obj))
118 return -1;
119 return 0;
121 return error("Unable to determine requirements "
122 "of type %s for %s",
123 obj->type, sha1_to_hex(obj->sha1));
126 static int process(unsigned char *sha1, const char *type)
128 struct object *obj = lookup_object_type(sha1, type);
129 if (has_sha1_file(sha1)) {
130 parse_object(sha1);
131 /* We already have it, so we should scan it now. */
132 return process_object(obj);
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;
139 //fprintf(stderr, "prefetch %s\n", sha1_to_hex(sha1));
140 prefetch(sha1);
142 return 0;
145 static int loop(void)
147 while (process_queue) {
148 struct object *obj = process_queue->item;
150 fprintf(stderr, "%d objects to pull\n",
151 object_list_length(process_queue));
153 process_queue = process_queue->next;
154 if (!process_queue)
155 process_queue_end = &process_queue;
157 //fprintf(stderr, "fetch %s\n", sha1_to_hex(obj->sha1));
159 if (make_sure_we_have_it(obj->type ? obj->type : "object",
160 obj->sha1))
161 return -1;
162 if (!obj->type)
163 parse_object(obj->sha1);
164 if (process_object(obj))
165 return -1;
167 return 0;
170 static int interpret_target(char *target, unsigned char *sha1)
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;
179 return -1;
183 int pull(char *target)
185 unsigned char sha1[20];
186 int fd = -1;
188 if (write_ref && current_ref) {
189 fd = lock_ref_sha1(write_ref, current_ref);
190 if (fd < 0)
191 return -1;
194 if (interpret_target(target, sha1))
195 return error("Could not interpret %s as something to pull",
196 target);
197 if (process(sha1, NULL))
198 return -1;
199 if (loop())
200 return -1;
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);
209 return 0;