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Commit | Line | Data |
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1 | /* | |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
6 | #include "cache.h" | |
7 | #include "exec_cmd.h" | |
8 | #include "tag.h" | |
9 | #include "tree.h" | |
10 | #include "builtin.h" | |
11 | ||
12 | static void pprint_tag(const unsigned char *sha1, const char *buf, unsigned long size) | |
13 | { | |
14 | /* the parser in tag.c is useless here. */ | |
15 | const char *endp = buf + size; | |
16 | const char *cp = buf; | |
17 | ||
18 | while (cp < endp) { | |
19 | char c = *cp++; | |
20 | if (c != '\n') | |
21 | continue; | |
22 | if (7 <= endp - cp && !memcmp("tagger ", cp, 7)) { | |
23 | const char *tagger = cp; | |
24 | ||
25 | /* Found the tagger line. Copy out the contents | |
26 | * of the buffer so far. | |
27 | */ | |
28 | write_or_die(1, buf, cp - buf); | |
29 | ||
30 | /* | |
31 | * Do something intelligent, like pretty-printing | |
32 | * the date. | |
33 | */ | |
34 | while (cp < endp) { | |
35 | if (*cp++ == '\n') { | |
36 | /* tagger to cp is a line | |
37 | * that has ident and time. | |
38 | */ | |
39 | const char *sp = tagger; | |
40 | char *ep; | |
41 | unsigned long date; | |
42 | long tz; | |
43 | while (sp < cp && *sp != '>') | |
44 | sp++; | |
45 | if (sp == cp) { | |
46 | /* give up */ | |
47 | write_or_die(1, tagger, | |
48 | cp - tagger); | |
49 | break; | |
50 | } | |
51 | while (sp < cp && | |
52 | !('0' <= *sp && *sp <= '9')) | |
53 | sp++; | |
54 | write_or_die(1, tagger, sp - tagger); | |
55 | date = strtoul(sp, &ep, 10); | |
56 | tz = strtol(ep, NULL, 10); | |
57 | sp = show_date(date, tz, 0); | |
58 | write_or_die(1, sp, strlen(sp)); | |
59 | xwrite(1, "\n", 1); | |
60 | break; | |
61 | } | |
62 | } | |
63 | break; | |
64 | } | |
65 | if (cp < endp && *cp == '\n') | |
66 | /* end of header */ | |
67 | break; | |
68 | } | |
69 | /* At this point, we have copied out the header up to the end of | |
70 | * the tagger line and cp points at one past \n. It could be the | |
71 | * next header line after the tagger line, or it could be another | |
72 | * \n that marks the end of the headers. We need to copy out the | |
73 | * remainder as is. | |
74 | */ | |
75 | if (cp < endp) | |
76 | write_or_die(1, cp, endp - cp); | |
77 | } | |
78 | ||
79 | int cmd_cat_file(int argc, const char **argv, const char *prefix) | |
80 | { | |
81 | unsigned char sha1[20]; | |
82 | enum object_type type; | |
83 | void *buf; | |
84 | unsigned long size; | |
85 | int opt; | |
86 | ||
87 | git_config(git_default_config); | |
88 | if (argc != 3) | |
89 | usage("git-cat-file [-t|-s|-e|-p|<type>] <sha1>"); | |
90 | if (get_sha1(argv[2], sha1)) | |
91 | die("Not a valid object name %s", argv[2]); | |
92 | ||
93 | opt = 0; | |
94 | if ( argv[1][0] == '-' ) { | |
95 | opt = argv[1][1]; | |
96 | if ( !opt || argv[1][2] ) | |
97 | opt = -1; /* Not a single character option */ | |
98 | } | |
99 | ||
100 | buf = NULL; | |
101 | switch (opt) { | |
102 | case 't': | |
103 | type = sha1_object_info(sha1, NULL); | |
104 | if (type > 0) { | |
105 | printf("%s\n", typename(type)); | |
106 | return 0; | |
107 | } | |
108 | break; | |
109 | ||
110 | case 's': | |
111 | type = sha1_object_info(sha1, &size); | |
112 | if (type > 0) { | |
113 | printf("%lu\n", size); | |
114 | return 0; | |
115 | } | |
116 | break; | |
117 | ||
118 | case 'e': | |
119 | return !has_sha1_file(sha1); | |
120 | ||
121 | case 'p': | |
122 | type = sha1_object_info(sha1, NULL); | |
123 | if (type < 0) | |
124 | die("Not a valid object name %s", argv[2]); | |
125 | ||
126 | /* custom pretty-print here */ | |
127 | if (type == OBJ_TREE) | |
128 | return cmd_ls_tree(2, argv + 1, NULL); | |
129 | ||
130 | buf = read_sha1_file(sha1, &type, &size); | |
131 | if (!buf) | |
132 | die("Cannot read object %s", argv[2]); | |
133 | if (type == OBJ_TAG) { | |
134 | pprint_tag(sha1, buf, size); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | /* otherwise just spit out the data */ | |
139 | break; | |
140 | case 0: | |
141 | buf = read_object_with_reference(sha1, argv[1], &size, NULL); | |
142 | break; | |
143 | ||
144 | default: | |
145 | die("git-cat-file: unknown option: %s\n", argv[1]); | |
146 | } | |
147 | ||
148 | if (!buf) | |
149 | die("git-cat-file %s: bad file", argv[2]); | |
150 | ||
151 | write_or_die(1, buf, size); | |
152 | return 0; | |
153 | } |