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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; | |
a48e1d67 | 9 | /* 1 means "get delta", 2 means "really check delta harder */ |
4a62b619 | 10 | int get_delta = 1; |
4250a5e5 | 11 | int get_all = 0; |
e78d9772 | 12 | int get_verbosely = 0; |
b2d62f16 | 13 | static unsigned char current_commit_sha1[20]; |
4250a5e5 | 14 | |
b2d62f16 JH |
15 | static const char commitS[] = "commit"; |
16 | static const char treeS[] = "tree"; | |
17 | static const char blobS[] = "blob"; | |
18 | ||
e78d9772 JH |
19 | void pull_say(const char *fmt, const char *hex) { |
20 | if (get_verbosely) | |
21 | fprintf(stderr, fmt, hex); | |
22 | } | |
23 | ||
b2d62f16 JH |
24 | static void report_missing(const char *what, const unsigned char *missing) |
25 | { | |
26 | char missing_hex[41]; | |
27 | ||
28 | strcpy(missing_hex, sha1_to_hex(missing));; | |
29 | fprintf(stderr, | |
30 | "Cannot obtain needed %s %s\nwhile processing commit %s.\n", | |
31 | what, missing_hex, sha1_to_hex(current_commit_sha1)); | |
32 | } | |
33 | ||
34 | static int make_sure_we_have_it(const char *what, unsigned char *sha1) | |
ee4f439f | 35 | { |
a48e1d67 JH |
36 | int status = 0; |
37 | ||
38 | if (!has_sha1_file(sha1)) { | |
39 | status = fetch(sha1); | |
40 | if (status && what) | |
41 | report_missing(what, sha1); | |
42 | } | |
43 | else if (get_delta < 2) | |
ee4f439f | 44 | return 0; |
a48e1d67 | 45 | |
4a62b619 JH |
46 | if (get_delta) { |
47 | char delta_sha1[20]; | |
48 | status = sha1_delta_base(sha1, delta_sha1); | |
49 | if (0 < status) | |
50 | status = make_sure_we_have_it(what, delta_sha1); | |
51 | } | |
b2d62f16 | 52 | return status; |
ee4f439f JH |
53 | } |
54 | ||
4250a5e5 DB |
55 | static int process_tree(unsigned char *sha1) |
56 | { | |
57 | struct tree *tree = lookup_tree(sha1); | |
58 | struct tree_entry_list *entries; | |
59 | ||
60 | if (parse_tree(tree)) | |
61 | return -1; | |
62 | ||
63 | for (entries = tree->entries; entries; entries = entries->next) { | |
b2d62f16 JH |
64 | const char *what = entries->directory ? treeS : blobS; |
65 | if (make_sure_we_have_it(what, entries->item.tree->object.sha1)) | |
4250a5e5 DB |
66 | return -1; |
67 | if (entries->directory) { | |
68 | if (process_tree(entries->item.tree->object.sha1)) | |
69 | return -1; | |
70 | } | |
71 | } | |
72 | return 0; | |
73 | } | |
74 | ||
75 | static int process_commit(unsigned char *sha1) | |
76 | { | |
77 | struct commit *obj = lookup_commit(sha1); | |
78 | ||
b2d62f16 | 79 | if (make_sure_we_have_it(commitS, sha1)) |
4250a5e5 DB |
80 | return -1; |
81 | ||
82 | if (parse_commit(obj)) | |
83 | return -1; | |
84 | ||
85 | if (get_tree) { | |
b2d62f16 | 86 | if (make_sure_we_have_it(treeS, obj->tree->object.sha1)) |
4250a5e5 DB |
87 | return -1; |
88 | if (process_tree(obj->tree->object.sha1)) | |
89 | return -1; | |
90 | if (!get_all) | |
91 | get_tree = 0; | |
92 | } | |
93 | if (get_history) { | |
94 | struct commit_list *parents = obj->parents; | |
95 | for (; parents; parents = parents->next) { | |
96 | if (has_sha1_file(parents->item->object.sha1)) | |
97 | continue; | |
b2d62f16 JH |
98 | if (make_sure_we_have_it(NULL, |
99 | parents->item->object.sha1)) { | |
4250a5e5 DB |
100 | /* The server might not have it, and |
101 | * we don't mind. | |
102 | */ | |
103 | continue; | |
104 | } | |
105 | if (process_commit(parents->item->object.sha1)) | |
106 | return -1; | |
b2d62f16 | 107 | memcpy(current_commit_sha1, sha1, 20); |
4250a5e5 DB |
108 | } |
109 | } | |
110 | return 0; | |
111 | } | |
112 | ||
113 | int pull(char *target) | |
114 | { | |
115 | int retval; | |
116 | unsigned char sha1[20]; | |
117 | retval = get_sha1_hex(target, sha1); | |
118 | if (retval) | |
119 | return retval; | |
b2d62f16 | 120 | retval = make_sure_we_have_it(commitS, sha1); |
4250a5e5 DB |
121 | if (retval) |
122 | return retval; | |
b2d62f16 | 123 | memcpy(current_commit_sha1, sha1, 20); |
4250a5e5 DB |
124 | return process_commit(sha1); |
125 | } |