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Commit | Line | Data |
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e74f8f6a LT |
1 | #include "cache.h" |
2 | ||
3 | static int cached_only = 0; | |
e74f8f6a LT |
4 | static int line_termination = '\n'; |
5 | ||
e74f8f6a | 6 | /* A file entry went away or appeared */ |
b5af9107 | 7 | static void show_file(const char *prefix, struct cache_entry *ce) |
e74f8f6a | 8 | { |
b5af9107 LT |
9 | printf("%s%o\t%s\t%s\t%s%c", prefix, ntohl(ce->ce_mode), "blob", |
10 | sha1_to_hex(ce->sha1), ce->name, line_termination); | |
e74f8f6a LT |
11 | } |
12 | ||
b5af9107 | 13 | static int show_modified(struct cache_entry *old, struct cache_entry *new) |
e74f8f6a | 14 | { |
b5af9107 LT |
15 | unsigned int mode = ntohl(new->ce_mode), oldmode; |
16 | unsigned char *sha1 = new->sha1; | |
17 | unsigned char old_sha1_hex[60]; | |
e74f8f6a LT |
18 | |
19 | if (!cached_only) { | |
20 | static unsigned char no_sha1[20]; | |
b5af9107 | 21 | int changed; |
e74f8f6a | 22 | struct stat st; |
b5af9107 LT |
23 | if (stat(new->name, &st) < 0) { |
24 | show_file("-", old); | |
e74f8f6a LT |
25 | return -1; |
26 | } | |
b5af9107 | 27 | changed = cache_match_stat(new, &st); |
e74f8f6a | 28 | if (changed) { |
b5af9107 LT |
29 | mode = st.st_mode; |
30 | sha1 = no_sha1; | |
e74f8f6a LT |
31 | } |
32 | } | |
33 | ||
b5af9107 LT |
34 | oldmode = ntohl(old->ce_mode); |
35 | if (mode == oldmode && !memcmp(sha1, old->sha1, 20)) | |
e74f8f6a LT |
36 | return 0; |
37 | ||
b5af9107 LT |
38 | strcpy(old_sha1_hex, sha1_to_hex(old->sha1)); |
39 | printf("*%o->%o\t%s\t%s->%s\t%s%c", oldmode, mode, | |
40 | "blob", | |
41 | old_sha1_hex, sha1_to_hex(sha1), | |
42 | old->name, line_termination); | |
e74f8f6a LT |
43 | return 0; |
44 | } | |
45 | ||
b5af9107 | 46 | static int diff_cache(struct cache_entry **ac, int entries) |
e74f8f6a | 47 | { |
b5af9107 LT |
48 | while (entries) { |
49 | struct cache_entry *ce = *ac; | |
e74f8f6a | 50 | |
b5af9107 LT |
51 | /* No matching 0-stage (current) entry? Show it as deleted */ |
52 | if (ce_stage(ce)) { | |
53 | show_file("-", ce); | |
e74f8f6a LT |
54 | ac++; |
55 | entries--; | |
56 | continue; | |
57 | } | |
b5af9107 LT |
58 | /* No matching 1-stage (tree) entry? Show the current one as added */ |
59 | if (entries == 1 || !same_name(ce, ac[1])) { | |
65bc81d6 | 60 | show_file("+", ce); |
e74f8f6a LT |
61 | ac++; |
62 | entries--; | |
63 | continue; | |
64 | } | |
b5af9107 LT |
65 | show_modified(ac[1], ce); |
66 | ac += 2; | |
67 | entries -= 2; | |
68 | continue; | |
e74f8f6a LT |
69 | } |
70 | return 0; | |
71 | } | |
72 | ||
b5af9107 LT |
73 | static void remove_merge_entries(void) |
74 | { | |
75 | int i; | |
76 | for (i = 0; i < active_nr; i++) { | |
77 | struct cache_entry *ce = active_cache[i]; | |
78 | if (!ce_stage(ce)) | |
79 | break; | |
80 | printf("%s: unmerged\n", ce->name); | |
81 | while (remove_entry_at(i)) { | |
82 | if (!ce_stage(active_cache[i])) | |
83 | break; | |
84 | } | |
85 | } | |
86 | } | |
87 | ||
c5bac17a JH |
88 | static char *diff_cache_usage = "diff-cache [-r] [-z] [--cached] <tree sha1>"; |
89 | ||
e74f8f6a LT |
90 | int main(int argc, char **argv) |
91 | { | |
92 | unsigned char tree_sha1[20]; | |
93 | void *tree; | |
94 | unsigned long size; | |
e74f8f6a LT |
95 | |
96 | read_cache(); | |
97 | while (argc > 2) { | |
98 | char *arg = argv[1]; | |
99 | argv++; | |
100 | argc--; | |
101 | if (!strcmp(arg, "-r")) { | |
b5af9107 | 102 | /* We accept the -r flag just to look like diff-tree */ |
e74f8f6a LT |
103 | continue; |
104 | } | |
105 | if (!strcmp(arg, "-z")) { | |
106 | line_termination = '\0'; | |
107 | continue; | |
108 | } | |
109 | if (!strcmp(arg, "--cached")) { | |
110 | cached_only = 1; | |
111 | continue; | |
112 | } | |
c5bac17a | 113 | usage(diff_cache_usage); |
e74f8f6a LT |
114 | } |
115 | ||
116 | if (argc != 2 || get_sha1_hex(argv[1], tree_sha1)) | |
c5bac17a | 117 | usage(diff_cache_usage); |
e74f8f6a | 118 | |
b5af9107 LT |
119 | remove_merge_entries(); |
120 | ||
38357e67 | 121 | tree = read_tree_with_tree_or_commit_sha1(tree_sha1, &size, 0); |
e74f8f6a LT |
122 | if (!tree) |
123 | die("bad tree object %s", argv[1]); | |
b5af9107 LT |
124 | if (read_tree(tree, size, 1)) |
125 | die("unable to read tree object %s", argv[1]); | |
e74f8f6a | 126 | |
b5af9107 | 127 | return diff_cache(active_cache, active_nr); |
e74f8f6a | 128 | } |