[PATCH] Make git-update-cache --refresh fail if update/merge needed.
[git/git.git] / pull.c
CommitLineData
4250a5e5
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1#include "pull.h"
2
3#include "cache.h"
4#include "commit.h"
5#include "tree.h"
6
7int get_tree = 0;
8int get_history = 0;
9int get_all = 0;
10
11static int process_tree(unsigned char *sha1)
12{
13 struct tree *tree = lookup_tree(sha1);
14 struct tree_entry_list *entries;
15
16 if (parse_tree(tree))
17 return -1;
18
19 for (entries = tree->entries; entries; entries = entries->next) {
20 if (fetch(entries->item.tree->object.sha1))
21 return -1;
22 if (entries->directory) {
23 if (process_tree(entries->item.tree->object.sha1))
24 return -1;
25 }
26 }
27 return 0;
28}
29
30static int process_commit(unsigned char *sha1)
31{
32 struct commit *obj = lookup_commit(sha1);
33
34 if (fetch(sha1))
35 return -1;
36
37 if (parse_commit(obj))
38 return -1;
39
40 if (get_tree) {
41 if (fetch(obj->tree->object.sha1))
42 return -1;
43 if (process_tree(obj->tree->object.sha1))
44 return -1;
45 if (!get_all)
46 get_tree = 0;
47 }
48 if (get_history) {
49 struct commit_list *parents = obj->parents;
50 for (; parents; parents = parents->next) {
51 if (has_sha1_file(parents->item->object.sha1))
52 continue;
53 if (fetch(parents->item->object.sha1)) {
54 /* The server might not have it, and
55 * we don't mind.
56 */
57 continue;
58 }
59 if (process_commit(parents->item->object.sha1))
60 return -1;
61 }
62 }
63 return 0;
64}
65
66int pull(char *target)
67{
68 int retval;
69 unsigned char sha1[20];
70 retval = get_sha1_hex(target, sha1);
71 if (retval)
72 return retval;
73 retval = fetch(sha1);
74 if (retval)
75 return retval;
76 return process_commit(sha1);
77}