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Commit | Line | Data |
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4250a5e5 DB |
1 | #include "pull.h" |
2 | ||
3 | #include "cache.h" | |
4 | #include "commit.h" | |
5 | #include "tree.h" | |
6 | ||
7 | int get_tree = 0; | |
8 | int get_history = 0; | |
9 | int get_all = 0; | |
e78d9772 | 10 | int get_verbosely = 0; |
b2d62f16 | 11 | static unsigned char current_commit_sha1[20]; |
4250a5e5 | 12 | |
b2d62f16 JH |
13 | static const char commitS[] = "commit"; |
14 | static const char treeS[] = "tree"; | |
15 | static const char blobS[] = "blob"; | |
16 | ||
e78d9772 JH |
17 | void pull_say(const char *fmt, const char *hex) { |
18 | if (get_verbosely) | |
19 | fprintf(stderr, fmt, hex); | |
20 | } | |
21 | ||
b2d62f16 JH |
22 | static void report_missing(const char *what, const unsigned char *missing) |
23 | { | |
24 | char missing_hex[41]; | |
25 | ||
26 | strcpy(missing_hex, sha1_to_hex(missing));; | |
27 | fprintf(stderr, | |
28 | "Cannot obtain needed %s %s\nwhile processing commit %s.\n", | |
29 | what, missing_hex, sha1_to_hex(current_commit_sha1)); | |
30 | } | |
31 | ||
32 | static int make_sure_we_have_it(const char *what, unsigned char *sha1) | |
ee4f439f | 33 | { |
b2d62f16 | 34 | int status; |
ee4f439f JH |
35 | if (has_sha1_file(sha1)) |
36 | return 0; | |
b2d62f16 JH |
37 | status = fetch(sha1); |
38 | if (status && what) | |
39 | report_missing(what, sha1); | |
40 | return status; | |
ee4f439f JH |
41 | } |
42 | ||
4250a5e5 DB |
43 | static int process_tree(unsigned char *sha1) |
44 | { | |
45 | struct tree *tree = lookup_tree(sha1); | |
46 | struct tree_entry_list *entries; | |
47 | ||
48 | if (parse_tree(tree)) | |
49 | return -1; | |
50 | ||
51 | for (entries = tree->entries; entries; entries = entries->next) { | |
b2d62f16 JH |
52 | const char *what = entries->directory ? treeS : blobS; |
53 | if (make_sure_we_have_it(what, entries->item.tree->object.sha1)) | |
4250a5e5 DB |
54 | return -1; |
55 | if (entries->directory) { | |
56 | if (process_tree(entries->item.tree->object.sha1)) | |
57 | return -1; | |
58 | } | |
59 | } | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static int process_commit(unsigned char *sha1) | |
64 | { | |
65 | struct commit *obj = lookup_commit(sha1); | |
66 | ||
b2d62f16 | 67 | if (make_sure_we_have_it(commitS, sha1)) |
4250a5e5 DB |
68 | return -1; |
69 | ||
70 | if (parse_commit(obj)) | |
71 | return -1; | |
72 | ||
73 | if (get_tree) { | |
b2d62f16 | 74 | if (make_sure_we_have_it(treeS, obj->tree->object.sha1)) |
4250a5e5 DB |
75 | return -1; |
76 | if (process_tree(obj->tree->object.sha1)) | |
77 | return -1; | |
78 | if (!get_all) | |
79 | get_tree = 0; | |
80 | } | |
81 | if (get_history) { | |
82 | struct commit_list *parents = obj->parents; | |
83 | for (; parents; parents = parents->next) { | |
84 | if (has_sha1_file(parents->item->object.sha1)) | |
85 | continue; | |
b2d62f16 JH |
86 | if (make_sure_we_have_it(NULL, |
87 | parents->item->object.sha1)) { | |
4250a5e5 DB |
88 | /* The server might not have it, and |
89 | * we don't mind. | |
90 | */ | |
91 | continue; | |
92 | } | |
93 | if (process_commit(parents->item->object.sha1)) | |
94 | return -1; | |
b2d62f16 | 95 | memcpy(current_commit_sha1, sha1, 20); |
4250a5e5 DB |
96 | } |
97 | } | |
98 | return 0; | |
99 | } | |
100 | ||
101 | int pull(char *target) | |
102 | { | |
103 | int retval; | |
104 | unsigned char sha1[20]; | |
105 | retval = get_sha1_hex(target, sha1); | |
106 | if (retval) | |
107 | return retval; | |
b2d62f16 | 108 | retval = make_sure_we_have_it(commitS, sha1); |
4250a5e5 DB |
109 | if (retval) |
110 | return retval; | |
b2d62f16 | 111 | memcpy(current_commit_sha1, sha1, 20); |
4250a5e5 DB |
112 | return process_commit(sha1); |
113 | } |