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Commit | Line | Data |
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f9767222 LT |
1 | #include "cache.h" |
2 | ||
3 | static void flush_current_id(int patchlen, unsigned char *id, SHA_CTX *c) | |
4 | { | |
5 | unsigned char result[20]; | |
6 | char name[50]; | |
7 | ||
8 | if (!patchlen) | |
9 | return; | |
10 | ||
11 | SHA1_Final(result, c); | |
12 | memcpy(name, sha1_to_hex(id), 41); | |
13 | printf("%s %s\n", sha1_to_hex(result), name); | |
14 | SHA1_Init(c); | |
15 | } | |
16 | ||
17 | static int remove_space(char *line) | |
18 | { | |
19 | char *src = line; | |
20 | char *dst = line; | |
21 | unsigned char c; | |
22 | ||
23 | while ((c = *src++) != '\0') { | |
24 | if (!isspace(c)) | |
25 | *dst++ = c; | |
26 | } | |
27 | return dst - line; | |
28 | } | |
29 | ||
30 | static void generate_id_list(void) | |
31 | { | |
32 | static unsigned char sha1[20]; | |
33 | static char line[1000]; | |
34 | SHA_CTX ctx; | |
35 | int patchlen = 0; | |
36 | ||
37 | SHA1_Init(&ctx); | |
38 | while (fgets(line, sizeof(line), stdin) != NULL) { | |
39 | unsigned char n[20]; | |
40 | char *p = line; | |
41 | int len; | |
42 | ||
43 | if (!memcmp(line, "diff-tree ", 10)) | |
44 | p += 10; | |
8d3cbd27 JS |
45 | else if (!memcmp(line, "commit ", 7)) |
46 | p += 7; | |
f9767222 LT |
47 | |
48 | if (!get_sha1_hex(p, n)) { | |
49 | flush_current_id(patchlen, sha1, &ctx); | |
e702496e | 50 | hashcpy(sha1, n); |
f9767222 LT |
51 | patchlen = 0; |
52 | continue; | |
53 | } | |
54 | ||
55 | /* Ignore commit comments */ | |
56 | if (!patchlen && memcmp(line, "diff ", 5)) | |
57 | continue; | |
58 | ||
9fabdedc KR |
59 | /* Ignore git-diff index header */ |
60 | if (!memcmp(line, "index ", 6)) | |
61 | continue; | |
62 | ||
f9767222 LT |
63 | /* Ignore line numbers when computing the SHA1 of the patch */ |
64 | if (!memcmp(line, "@@ -", 4)) | |
65 | continue; | |
66 | ||
67 | /* Compute the sha without whitespace */ | |
68 | len = remove_space(line); | |
69 | patchlen += len; | |
70 | SHA1_Update(&ctx, line, len); | |
71 | } | |
72 | flush_current_id(patchlen, sha1, &ctx); | |
73 | } | |
74 | ||
54c6870e | 75 | static const char patch_id_usage[] = "git-patch-id < patch"; |
f9767222 LT |
76 | |
77 | int main(int argc, char **argv) | |
78 | { | |
79 | if (argc != 1) | |
80 | usage(patch_id_usage); | |
81 | ||
82 | generate_id_list(); | |
83 | return 0; | |
84 | } |