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Commit | Line | Data |
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178cb243 LT |
1 | /* |
2 | * rev-parse.c | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
6 | #include "cache.h" | |
a8be83fe | 7 | #include "commit.h" |
960bba0d | 8 | #include "refs.h" |
c1babb1d | 9 | #include "quote.h" |
a8be83fe | 10 | |
4866ccf0 JH |
11 | #define DO_REVS 1 |
12 | #define DO_NOREV 2 | |
13 | #define DO_FLAGS 4 | |
14 | #define DO_NONFLAGS 8 | |
15 | static int filter = ~0; | |
16 | ||
023d66ed | 17 | static char *def = NULL; |
023d66ed | 18 | |
042a4ed7 LT |
19 | #define NORMAL 0 |
20 | #define REVERSED 1 | |
21 | static int show_type = NORMAL; | |
4866ccf0 JH |
22 | static int symbolic = 0; |
23 | static int output_sq = 0; | |
24 | ||
25 | static int revs_count = 0; | |
042a4ed7 | 26 | |
921d865e LT |
27 | /* |
28 | * Some arguments are relevant "revision" arguments, | |
29 | * others are about output format or other details. | |
30 | * This sorts it all out. | |
31 | */ | |
32 | static int is_rev_argument(const char *arg) | |
33 | { | |
34 | static const char *rev_args[] = { | |
e091eb93 | 35 | "--all", |
4866ccf0 | 36 | "--bisect", |
5a83f3be | 37 | "--dense", |
4866ccf0 | 38 | "--header", |
921d865e | 39 | "--max-age=", |
4866ccf0 | 40 | "--max-count=", |
921d865e | 41 | "--merge-order", |
4866ccf0 | 42 | "--min-age=", |
5ccfb758 | 43 | "--no-merges", |
4866ccf0 JH |
44 | "--objects", |
45 | "--parents", | |
46 | "--pretty", | |
47 | "--show-breaks", | |
5a83f3be | 48 | "--sparse", |
4866ccf0 JH |
49 | "--topo-order", |
50 | "--unpacked", | |
921d865e LT |
51 | NULL |
52 | }; | |
53 | const char **p = rev_args; | |
54 | ||
55 | for (;;) { | |
56 | const char *str = *p++; | |
57 | int len; | |
58 | if (!str) | |
59 | return 0; | |
60 | len = strlen(str); | |
4866ccf0 JH |
61 | if (!strcmp(arg, str) || |
62 | (str[len-1] == '=' && !strncmp(arg, str, len))) | |
921d865e LT |
63 | return 1; |
64 | } | |
65 | } | |
66 | ||
4866ccf0 | 67 | /* Output argument as a string, either SQ or normal */ |
5bb2c65a JH |
68 | static void show(const char *arg) |
69 | { | |
70 | if (output_sq) { | |
71 | int sq = '\'', ch; | |
72 | ||
73 | putchar(sq); | |
74 | while ((ch = *arg++)) { | |
75 | if (ch == sq) | |
76 | fputs("'\\'", stdout); | |
77 | putchar(ch); | |
78 | } | |
79 | putchar(sq); | |
80 | putchar(' '); | |
81 | } | |
82 | else | |
83 | puts(arg); | |
84 | } | |
85 | ||
4866ccf0 | 86 | /* Output a revision, only if filter allows it */ |
30b96fce | 87 | static void show_rev(int type, const unsigned char *sha1, const char *name) |
023d66ed | 88 | { |
4866ccf0 | 89 | if (!(filter & DO_REVS)) |
023d66ed | 90 | return; |
4866ccf0 JH |
91 | def = NULL; |
92 | revs_count++; | |
5bb2c65a | 93 | |
30b96fce JH |
94 | if (type != show_type) |
95 | putchar('^'); | |
96 | if (symbolic && name) | |
97 | show(name); | |
98 | else | |
99 | show(sha1_to_hex(sha1)); | |
023d66ed LT |
100 | } |
101 | ||
4866ccf0 JH |
102 | /* Output a flag, only if filter allows it. */ |
103 | static void show_flag(char *arg) | |
023d66ed | 104 | { |
4866ccf0 | 105 | if (!(filter & DO_FLAGS)) |
023d66ed | 106 | return; |
4866ccf0 | 107 | if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) |
0360e99d | 108 | show(arg); |
023d66ed LT |
109 | } |
110 | ||
023d66ed LT |
111 | static void show_default(void) |
112 | { | |
113 | char *s = def; | |
114 | ||
115 | if (s) { | |
116 | unsigned char sha1[20]; | |
117 | ||
118 | def = NULL; | |
9938af6a | 119 | if (!get_sha1(s, sha1)) { |
30b96fce | 120 | show_rev(NORMAL, sha1, s); |
023d66ed LT |
121 | return; |
122 | } | |
023d66ed LT |
123 | } |
124 | } | |
125 | ||
960bba0d LT |
126 | static int show_reference(const char *refname, const unsigned char *sha1) |
127 | { | |
30b96fce | 128 | show_rev(NORMAL, sha1, refname); |
960bba0d LT |
129 | return 0; |
130 | } | |
131 | ||
c1babb1d LT |
132 | static void show_datestring(const char *flag, const char *datestr) |
133 | { | |
c1babb1d | 134 | static char buffer[100]; |
c1babb1d LT |
135 | |
136 | /* date handling requires both flags and revs */ | |
137 | if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS)) | |
138 | return; | |
3c07b1d1 | 139 | snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr)); |
c1babb1d LT |
140 | show(buffer); |
141 | } | |
142 | ||
7a3dd472 LT |
143 | static void show_file(const char *arg) |
144 | { | |
7b34c2fa | 145 | show_default(); |
7a3dd472 LT |
146 | if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) |
147 | show(arg); | |
148 | } | |
149 | ||
178cb243 LT |
150 | int main(int argc, char **argv) |
151 | { | |
4866ccf0 | 152 | int i, as_is = 0, verify = 0; |
178cb243 | 153 | unsigned char sha1[20]; |
d288a700 LT |
154 | const char *prefix = setup_git_directory(); |
155 | ||
178cb243 LT |
156 | for (i = 1; i < argc; i++) { |
157 | char *arg = argv[i]; | |
158 | char *dotdot; | |
159 | ||
160 | if (as_is) { | |
7a3dd472 | 161 | show_file(arg); |
178cb243 LT |
162 | continue; |
163 | } | |
164 | if (*arg == '-') { | |
165 | if (!strcmp(arg, "--")) { | |
178cb243 | 166 | as_is = 1; |
a08b6505 LT |
167 | /* Pass on the "--" if we show anything but files.. */ |
168 | if (filter & (DO_FLAGS | DO_REVS)) | |
169 | show_file(arg); | |
4866ccf0 | 170 | continue; |
178cb243 LT |
171 | } |
172 | if (!strcmp(arg, "--default")) { | |
178cb243 LT |
173 | def = argv[i+1]; |
174 | i++; | |
175 | continue; | |
176 | } | |
8ebb0184 | 177 | if (!strcmp(arg, "--revs-only")) { |
4866ccf0 | 178 | filter &= ~DO_NOREV; |
8ebb0184 LT |
179 | continue; |
180 | } | |
181 | if (!strcmp(arg, "--no-revs")) { | |
4866ccf0 | 182 | filter &= ~DO_REVS; |
8ebb0184 LT |
183 | continue; |
184 | } | |
f79b65aa | 185 | if (!strcmp(arg, "--flags")) { |
4866ccf0 | 186 | filter &= ~DO_NONFLAGS; |
f79b65aa LT |
187 | continue; |
188 | } | |
189 | if (!strcmp(arg, "--no-flags")) { | |
4866ccf0 | 190 | filter &= ~DO_FLAGS; |
f79b65aa LT |
191 | continue; |
192 | } | |
023d66ed | 193 | if (!strcmp(arg, "--verify")) { |
4866ccf0 JH |
194 | filter &= ~(DO_FLAGS|DO_NOREV); |
195 | verify = 1; | |
023d66ed | 196 | continue; |
921d865e | 197 | } |
5bb2c65a JH |
198 | if (!strcmp(arg, "--sq")) { |
199 | output_sq = 1; | |
200 | continue; | |
201 | } | |
042a4ed7 LT |
202 | if (!strcmp(arg, "--not")) { |
203 | show_type ^= REVERSED; | |
204 | continue; | |
205 | } | |
30b96fce JH |
206 | if (!strcmp(arg, "--symbolic")) { |
207 | symbolic = 1; | |
208 | continue; | |
209 | } | |
960bba0d LT |
210 | if (!strcmp(arg, "--all")) { |
211 | for_each_ref(show_reference); | |
212 | continue; | |
213 | } | |
d288a700 | 214 | if (!strcmp(arg, "--show-prefix")) { |
4866ccf0 JH |
215 | if (prefix) |
216 | puts(prefix); | |
d288a700 LT |
217 | continue; |
218 | } | |
a8783eeb LT |
219 | if (!strcmp(arg, "--git-dir")) { |
220 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
221 | static char cwd[PATH_MAX]; | |
222 | if (gitdir) { | |
223 | puts(gitdir); | |
224 | continue; | |
225 | } | |
226 | if (!prefix) { | |
227 | puts(".git"); | |
228 | continue; | |
229 | } | |
230 | if (!getcwd(cwd, PATH_MAX)) | |
231 | die("unable to get current working directory"); | |
232 | printf("%s/.git\n", cwd); | |
233 | continue; | |
234 | } | |
c1babb1d LT |
235 | if (!strncmp(arg, "--since=", 8)) { |
236 | show_datestring("--max-age=", arg+8); | |
237 | continue; | |
238 | } | |
239 | if (!strncmp(arg, "--after=", 8)) { | |
240 | show_datestring("--max-age=", arg+8); | |
241 | continue; | |
242 | } | |
243 | if (!strncmp(arg, "--before=", 9)) { | |
244 | show_datestring("--min-age=", arg+9); | |
245 | continue; | |
246 | } | |
247 | if (!strncmp(arg, "--until=", 8)) { | |
248 | show_datestring("--min-age=", arg+8); | |
249 | continue; | |
250 | } | |
4866ccf0 JH |
251 | if (verify) |
252 | die("Needed a single revision"); | |
253 | show_flag(arg); | |
178cb243 LT |
254 | continue; |
255 | } | |
4866ccf0 JH |
256 | |
257 | /* Not a flag argument */ | |
178cb243 LT |
258 | dotdot = strstr(arg, ".."); |
259 | if (dotdot) { | |
260 | unsigned char end[20]; | |
261 | char *n = dotdot+2; | |
262 | *dotdot = 0; | |
9938af6a | 263 | if (!get_sha1(arg, sha1)) { |
178cb243 LT |
264 | if (!*n) |
265 | n = "HEAD"; | |
9938af6a | 266 | if (!get_sha1(n, end)) { |
30b96fce JH |
267 | show_rev(NORMAL, end, n); |
268 | show_rev(REVERSED, sha1, arg); | |
178cb243 LT |
269 | continue; |
270 | } | |
271 | } | |
272 | *dotdot = '.'; | |
273 | } | |
9938af6a | 274 | if (!get_sha1(arg, sha1)) { |
30b96fce | 275 | show_rev(NORMAL, sha1, arg); |
800644c5 LT |
276 | continue; |
277 | } | |
9938af6a | 278 | if (*arg == '^' && !get_sha1(arg+1, sha1)) { |
30b96fce | 279 | show_rev(REVERSED, sha1, arg+1); |
800644c5 LT |
280 | continue; |
281 | } | |
4866ccf0 JH |
282 | if (verify) |
283 | die("Needed a single revision"); | |
af13cdf2 | 284 | as_is = 1; |
7a3dd472 | 285 | show_file(arg); |
023d66ed LT |
286 | } |
287 | show_default(); | |
4866ccf0 JH |
288 | if (verify && revs_count != 1) |
289 | die("Needed a single revision"); | |
178cb243 LT |
290 | return 0; |
291 | } |