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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 | 22 | static int symbolic = 0; |
d5012508 | 23 | static int abbrev = 0; |
4866ccf0 JH |
24 | static int output_sq = 0; |
25 | ||
26 | static int revs_count = 0; | |
042a4ed7 | 27 | |
921d865e LT |
28 | /* |
29 | * Some arguments are relevant "revision" arguments, | |
30 | * others are about output format or other details. | |
31 | * This sorts it all out. | |
32 | */ | |
33 | static int is_rev_argument(const char *arg) | |
34 | { | |
35 | static const char *rev_args[] = { | |
e091eb93 | 36 | "--all", |
4866ccf0 | 37 | "--bisect", |
5a83f3be | 38 | "--dense", |
4866ccf0 | 39 | "--header", |
921d865e | 40 | "--max-age=", |
4866ccf0 | 41 | "--max-count=", |
4866ccf0 | 42 | "--min-age=", |
5ccfb758 | 43 | "--no-merges", |
4866ccf0 | 44 | "--objects", |
c6496575 | 45 | "--objects-edge", |
4866ccf0 JH |
46 | "--parents", |
47 | "--pretty", | |
5a83f3be | 48 | "--sparse", |
4866ccf0 | 49 | "--topo-order", |
4c8725f1 | 50 | "--date-order", |
4866ccf0 | 51 | "--unpacked", |
921d865e LT |
52 | NULL |
53 | }; | |
54 | const char **p = rev_args; | |
55 | ||
8233340c EW |
56 | /* accept -<digit>, like traditional "head" */ |
57 | if ((*arg == '-') && isdigit(arg[1])) | |
58 | return 1; | |
59 | ||
921d865e LT |
60 | for (;;) { |
61 | const char *str = *p++; | |
62 | int len; | |
63 | if (!str) | |
64 | return 0; | |
65 | len = strlen(str); | |
4866ccf0 JH |
66 | if (!strcmp(arg, str) || |
67 | (str[len-1] == '=' && !strncmp(arg, str, len))) | |
921d865e LT |
68 | return 1; |
69 | } | |
70 | } | |
71 | ||
4866ccf0 | 72 | /* Output argument as a string, either SQ or normal */ |
5bb2c65a JH |
73 | static void show(const char *arg) |
74 | { | |
75 | if (output_sq) { | |
76 | int sq = '\'', ch; | |
77 | ||
78 | putchar(sq); | |
79 | while ((ch = *arg++)) { | |
80 | if (ch == sq) | |
81 | fputs("'\\'", stdout); | |
82 | putchar(ch); | |
83 | } | |
84 | putchar(sq); | |
85 | putchar(' '); | |
86 | } | |
87 | else | |
88 | puts(arg); | |
89 | } | |
90 | ||
4866ccf0 | 91 | /* Output a revision, only if filter allows it */ |
30b96fce | 92 | static void show_rev(int type, const unsigned char *sha1, const char *name) |
023d66ed | 93 | { |
4866ccf0 | 94 | if (!(filter & DO_REVS)) |
023d66ed | 95 | return; |
4866ccf0 JH |
96 | def = NULL; |
97 | revs_count++; | |
5bb2c65a | 98 | |
30b96fce JH |
99 | if (type != show_type) |
100 | putchar('^'); | |
101 | if (symbolic && name) | |
102 | show(name); | |
d5012508 JH |
103 | else if (abbrev) |
104 | show(find_unique_abbrev(sha1, abbrev)); | |
30b96fce JH |
105 | else |
106 | show(sha1_to_hex(sha1)); | |
023d66ed LT |
107 | } |
108 | ||
4866ccf0 | 109 | /* Output a flag, only if filter allows it. */ |
9523a4c2 | 110 | static int show_flag(char *arg) |
023d66ed | 111 | { |
4866ccf0 | 112 | if (!(filter & DO_FLAGS)) |
9523a4c2 LT |
113 | return 0; |
114 | if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV)) { | |
0360e99d | 115 | show(arg); |
9523a4c2 LT |
116 | return 1; |
117 | } | |
118 | return 0; | |
023d66ed LT |
119 | } |
120 | ||
023d66ed LT |
121 | static void show_default(void) |
122 | { | |
123 | char *s = def; | |
124 | ||
125 | if (s) { | |
126 | unsigned char sha1[20]; | |
127 | ||
128 | def = NULL; | |
9938af6a | 129 | if (!get_sha1(s, sha1)) { |
30b96fce | 130 | show_rev(NORMAL, sha1, s); |
023d66ed LT |
131 | return; |
132 | } | |
023d66ed LT |
133 | } |
134 | } | |
135 | ||
960bba0d LT |
136 | static int show_reference(const char *refname, const unsigned char *sha1) |
137 | { | |
30b96fce | 138 | show_rev(NORMAL, sha1, refname); |
960bba0d LT |
139 | return 0; |
140 | } | |
141 | ||
c1babb1d LT |
142 | static void show_datestring(const char *flag, const char *datestr) |
143 | { | |
c1babb1d | 144 | static char buffer[100]; |
c1babb1d LT |
145 | |
146 | /* date handling requires both flags and revs */ | |
147 | if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS)) | |
148 | return; | |
3c07b1d1 | 149 | snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr)); |
c1babb1d LT |
150 | show(buffer); |
151 | } | |
152 | ||
9ad0a933 | 153 | static int show_file(const char *arg) |
7a3dd472 | 154 | { |
7b34c2fa | 155 | show_default(); |
9ad0a933 | 156 | if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV)) { |
7a3dd472 | 157 | show(arg); |
9ad0a933 LT |
158 | return 1; |
159 | } | |
160 | return 0; | |
7a3dd472 LT |
161 | } |
162 | ||
178cb243 LT |
163 | int main(int argc, char **argv) |
164 | { | |
4866ccf0 | 165 | int i, as_is = 0, verify = 0; |
178cb243 | 166 | unsigned char sha1[20]; |
d288a700 LT |
167 | const char *prefix = setup_git_directory(); |
168 | ||
84a9b58c JH |
169 | git_config(git_default_config); |
170 | ||
178cb243 | 171 | for (i = 1; i < argc; i++) { |
d8f6b342 | 172 | struct stat st; |
178cb243 LT |
173 | char *arg = argv[i]; |
174 | char *dotdot; | |
fb18a2ed | 175 | |
178cb243 | 176 | if (as_is) { |
fb18a2ed LT |
177 | if (show_file(arg) && as_is < 2) |
178 | if (lstat(arg, &st) < 0) | |
179 | die("'%s': %s", arg, strerror(errno)); | |
178cb243 LT |
180 | continue; |
181 | } | |
3af06987 EW |
182 | if (!strcmp(arg,"-n")) { |
183 | if (++i >= argc) | |
184 | die("-n requires an argument"); | |
185 | if ((filter & DO_FLAGS) && (filter & DO_REVS)) { | |
186 | show(arg); | |
187 | show(argv[i]); | |
188 | } | |
189 | continue; | |
190 | } | |
191 | if (!strncmp(arg,"-n",2)) { | |
192 | if ((filter & DO_FLAGS) && (filter & DO_REVS)) | |
193 | show(arg); | |
194 | continue; | |
195 | } | |
196 | ||
178cb243 LT |
197 | if (*arg == '-') { |
198 | if (!strcmp(arg, "--")) { | |
fb18a2ed | 199 | as_is = 2; |
a08b6505 LT |
200 | /* Pass on the "--" if we show anything but files.. */ |
201 | if (filter & (DO_FLAGS | DO_REVS)) | |
202 | show_file(arg); | |
4866ccf0 | 203 | continue; |
178cb243 LT |
204 | } |
205 | if (!strcmp(arg, "--default")) { | |
178cb243 LT |
206 | def = argv[i+1]; |
207 | i++; | |
208 | continue; | |
209 | } | |
8ebb0184 | 210 | if (!strcmp(arg, "--revs-only")) { |
4866ccf0 | 211 | filter &= ~DO_NOREV; |
8ebb0184 LT |
212 | continue; |
213 | } | |
214 | if (!strcmp(arg, "--no-revs")) { | |
4866ccf0 | 215 | filter &= ~DO_REVS; |
8ebb0184 LT |
216 | continue; |
217 | } | |
f79b65aa | 218 | if (!strcmp(arg, "--flags")) { |
4866ccf0 | 219 | filter &= ~DO_NONFLAGS; |
f79b65aa LT |
220 | continue; |
221 | } | |
222 | if (!strcmp(arg, "--no-flags")) { | |
4866ccf0 | 223 | filter &= ~DO_FLAGS; |
f79b65aa LT |
224 | continue; |
225 | } | |
023d66ed | 226 | if (!strcmp(arg, "--verify")) { |
4866ccf0 JH |
227 | filter &= ~(DO_FLAGS|DO_NOREV); |
228 | verify = 1; | |
023d66ed | 229 | continue; |
921d865e | 230 | } |
62a604ba | 231 | if (!strcmp(arg, "--short") || |
44de0da4 | 232 | !strncmp(arg, "--short=", 8)) { |
d5012508 JH |
233 | filter &= ~(DO_FLAGS|DO_NOREV); |
234 | verify = 1; | |
235 | abbrev = DEFAULT_ABBREV; | |
44de0da4 JF |
236 | if (arg[7] == '=') |
237 | abbrev = strtoul(arg + 8, NULL, 10); | |
1dc4fb84 JH |
238 | if (abbrev < MINIMUM_ABBREV) |
239 | abbrev = MINIMUM_ABBREV; | |
240 | else if (40 <= abbrev) | |
241 | abbrev = 40; | |
d5012508 JH |
242 | continue; |
243 | } | |
5bb2c65a JH |
244 | if (!strcmp(arg, "--sq")) { |
245 | output_sq = 1; | |
246 | continue; | |
247 | } | |
042a4ed7 LT |
248 | if (!strcmp(arg, "--not")) { |
249 | show_type ^= REVERSED; | |
250 | continue; | |
251 | } | |
30b96fce JH |
252 | if (!strcmp(arg, "--symbolic")) { |
253 | symbolic = 1; | |
254 | continue; | |
255 | } | |
960bba0d LT |
256 | if (!strcmp(arg, "--all")) { |
257 | for_each_ref(show_reference); | |
258 | continue; | |
259 | } | |
d288a700 | 260 | if (!strcmp(arg, "--show-prefix")) { |
4866ccf0 JH |
261 | if (prefix) |
262 | puts(prefix); | |
d288a700 LT |
263 | continue; |
264 | } | |
5f94c730 JH |
265 | if (!strcmp(arg, "--show-cdup")) { |
266 | const char *pfx = prefix; | |
267 | while (pfx) { | |
268 | pfx = strchr(pfx, '/'); | |
269 | if (pfx) { | |
270 | pfx++; | |
271 | printf("../"); | |
272 | } | |
273 | } | |
274 | putchar('\n'); | |
275 | continue; | |
276 | } | |
a8783eeb LT |
277 | if (!strcmp(arg, "--git-dir")) { |
278 | const char *gitdir = getenv(GIT_DIR_ENVIRONMENT); | |
279 | static char cwd[PATH_MAX]; | |
280 | if (gitdir) { | |
281 | puts(gitdir); | |
282 | continue; | |
283 | } | |
284 | if (!prefix) { | |
285 | puts(".git"); | |
286 | continue; | |
287 | } | |
288 | if (!getcwd(cwd, PATH_MAX)) | |
289 | die("unable to get current working directory"); | |
290 | printf("%s/.git\n", cwd); | |
291 | continue; | |
292 | } | |
c1babb1d LT |
293 | if (!strncmp(arg, "--since=", 8)) { |
294 | show_datestring("--max-age=", arg+8); | |
295 | continue; | |
296 | } | |
297 | if (!strncmp(arg, "--after=", 8)) { | |
298 | show_datestring("--max-age=", arg+8); | |
299 | continue; | |
300 | } | |
301 | if (!strncmp(arg, "--before=", 9)) { | |
302 | show_datestring("--min-age=", arg+9); | |
303 | continue; | |
304 | } | |
305 | if (!strncmp(arg, "--until=", 8)) { | |
306 | show_datestring("--min-age=", arg+8); | |
307 | continue; | |
308 | } | |
9523a4c2 | 309 | if (show_flag(arg) && verify) |
4866ccf0 | 310 | die("Needed a single revision"); |
178cb243 LT |
311 | continue; |
312 | } | |
4866ccf0 JH |
313 | |
314 | /* Not a flag argument */ | |
178cb243 LT |
315 | dotdot = strstr(arg, ".."); |
316 | if (dotdot) { | |
317 | unsigned char end[20]; | |
ce4a7063 JH |
318 | char *next = dotdot + 2; |
319 | char *this = arg; | |
178cb243 | 320 | *dotdot = 0; |
ce4a7063 JH |
321 | if (!*next) |
322 | next = "HEAD"; | |
323 | if (dotdot == arg) | |
324 | this = "HEAD"; | |
325 | if (!get_sha1(this, sha1) && !get_sha1(next, end)) { | |
326 | show_rev(NORMAL, end, next); | |
327 | show_rev(REVERSED, sha1, this); | |
328 | continue; | |
178cb243 LT |
329 | } |
330 | *dotdot = '.'; | |
331 | } | |
9938af6a | 332 | if (!get_sha1(arg, sha1)) { |
30b96fce | 333 | show_rev(NORMAL, sha1, arg); |
800644c5 LT |
334 | continue; |
335 | } | |
9938af6a | 336 | if (*arg == '^' && !get_sha1(arg+1, sha1)) { |
30b96fce | 337 | show_rev(REVERSED, sha1, arg+1); |
800644c5 LT |
338 | continue; |
339 | } | |
9ad0a933 LT |
340 | as_is = 1; |
341 | if (!show_file(arg)) | |
342 | continue; | |
4866ccf0 JH |
343 | if (verify) |
344 | die("Needed a single revision"); | |
9ad0a933 | 345 | if (lstat(arg, &st) < 0) |
d8f6b342 | 346 | die("'%s': %s", arg, strerror(errno)); |
023d66ed LT |
347 | } |
348 | show_default(); | |
4866ccf0 JH |
349 | if (verify && revs_count != 1) |
350 | die("Needed a single revision"); | |
178cb243 LT |
351 | return 0; |
352 | } |