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