git-send-email: Fully implement --quiet and document it.
[git/git.git] / rev-parse.c
CommitLineData
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
15static int filter = ~0;
16
023d66ed 17static char *def = NULL;
023d66ed 18
042a4ed7
LT
19#define NORMAL 0
20#define REVERSED 1
21static int show_type = NORMAL;
4866ccf0 22static int symbolic = 0;
d5012508 23static int abbrev = 0;
4866ccf0
JH
24static int output_sq = 0;
25
26static 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 */
33static 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=",
921d865e 42 "--merge-order",
4866ccf0 43 "--min-age=",
5ccfb758 44 "--no-merges",
4866ccf0
JH
45 "--objects",
46 "--parents",
47 "--pretty",
48 "--show-breaks",
5a83f3be 49 "--sparse",
4866ccf0
JH
50 "--topo-order",
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
73static 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 92static 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 110static 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
121static 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
136static 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
142static 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
7a3dd472
LT
153static void show_file(const char *arg)
154{
7b34c2fa 155 show_default();
7a3dd472
LT
156 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV))
157 show(arg);
158}
159
178cb243
LT
160int main(int argc, char **argv)
161{
4866ccf0 162 int i, as_is = 0, verify = 0;
178cb243 163 unsigned char sha1[20];
d288a700
LT
164 const char *prefix = setup_git_directory();
165
178cb243 166 for (i = 1; i < argc; i++) {
d8f6b342 167 struct stat st;
178cb243
LT
168 char *arg = argv[i];
169 char *dotdot;
170
171 if (as_is) {
7a3dd472 172 show_file(arg);
178cb243
LT
173 continue;
174 }
3af06987
EW
175 if (!strcmp(arg,"-n")) {
176 if (++i >= argc)
177 die("-n requires an argument");
178 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
179 show(arg);
180 show(argv[i]);
181 }
182 continue;
183 }
184 if (!strncmp(arg,"-n",2)) {
185 if ((filter & DO_FLAGS) && (filter & DO_REVS))
186 show(arg);
187 continue;
188 }
189
178cb243
LT
190 if (*arg == '-') {
191 if (!strcmp(arg, "--")) {
178cb243 192 as_is = 1;
a08b6505
LT
193 /* Pass on the "--" if we show anything but files.. */
194 if (filter & (DO_FLAGS | DO_REVS))
195 show_file(arg);
4866ccf0 196 continue;
178cb243
LT
197 }
198 if (!strcmp(arg, "--default")) {
178cb243
LT
199 def = argv[i+1];
200 i++;
201 continue;
202 }
8ebb0184 203 if (!strcmp(arg, "--revs-only")) {
4866ccf0 204 filter &= ~DO_NOREV;
8ebb0184
LT
205 continue;
206 }
207 if (!strcmp(arg, "--no-revs")) {
4866ccf0 208 filter &= ~DO_REVS;
8ebb0184
LT
209 continue;
210 }
f79b65aa 211 if (!strcmp(arg, "--flags")) {
4866ccf0 212 filter &= ~DO_NONFLAGS;
f79b65aa
LT
213 continue;
214 }
215 if (!strcmp(arg, "--no-flags")) {
4866ccf0 216 filter &= ~DO_FLAGS;
f79b65aa
LT
217 continue;
218 }
023d66ed 219 if (!strcmp(arg, "--verify")) {
4866ccf0
JH
220 filter &= ~(DO_FLAGS|DO_NOREV);
221 verify = 1;
023d66ed 222 continue;
921d865e 223 }
62a604ba
JH
224 if (!strcmp(arg, "--short") ||
225 !strncmp(arg, "--short=", 9)) {
d5012508
JH
226 filter &= ~(DO_FLAGS|DO_NOREV);
227 verify = 1;
228 abbrev = DEFAULT_ABBREV;
229 if (arg[8] == '=')
230 abbrev = strtoul(arg + 9, NULL, 10);
1dc4fb84
JH
231 if (abbrev < MINIMUM_ABBREV)
232 abbrev = MINIMUM_ABBREV;
233 else if (40 <= abbrev)
234 abbrev = 40;
d5012508
JH
235 continue;
236 }
5bb2c65a
JH
237 if (!strcmp(arg, "--sq")) {
238 output_sq = 1;
239 continue;
240 }
042a4ed7
LT
241 if (!strcmp(arg, "--not")) {
242 show_type ^= REVERSED;
243 continue;
244 }
30b96fce
JH
245 if (!strcmp(arg, "--symbolic")) {
246 symbolic = 1;
247 continue;
248 }
960bba0d
LT
249 if (!strcmp(arg, "--all")) {
250 for_each_ref(show_reference);
251 continue;
252 }
d288a700 253 if (!strcmp(arg, "--show-prefix")) {
4866ccf0
JH
254 if (prefix)
255 puts(prefix);
d288a700
LT
256 continue;
257 }
5f94c730
JH
258 if (!strcmp(arg, "--show-cdup")) {
259 const char *pfx = prefix;
260 while (pfx) {
261 pfx = strchr(pfx, '/');
262 if (pfx) {
263 pfx++;
264 printf("../");
265 }
266 }
267 putchar('\n');
268 continue;
269 }
a8783eeb
LT
270 if (!strcmp(arg, "--git-dir")) {
271 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
272 static char cwd[PATH_MAX];
273 if (gitdir) {
274 puts(gitdir);
275 continue;
276 }
277 if (!prefix) {
278 puts(".git");
279 continue;
280 }
281 if (!getcwd(cwd, PATH_MAX))
282 die("unable to get current working directory");
283 printf("%s/.git\n", cwd);
284 continue;
285 }
c1babb1d
LT
286 if (!strncmp(arg, "--since=", 8)) {
287 show_datestring("--max-age=", arg+8);
288 continue;
289 }
290 if (!strncmp(arg, "--after=", 8)) {
291 show_datestring("--max-age=", arg+8);
292 continue;
293 }
294 if (!strncmp(arg, "--before=", 9)) {
295 show_datestring("--min-age=", arg+9);
296 continue;
297 }
298 if (!strncmp(arg, "--until=", 8)) {
299 show_datestring("--min-age=", arg+8);
300 continue;
301 }
9523a4c2 302 if (show_flag(arg) && verify)
4866ccf0 303 die("Needed a single revision");
178cb243
LT
304 continue;
305 }
4866ccf0
JH
306
307 /* Not a flag argument */
178cb243
LT
308 dotdot = strstr(arg, "..");
309 if (dotdot) {
310 unsigned char end[20];
311 char *n = dotdot+2;
312 *dotdot = 0;
9938af6a 313 if (!get_sha1(arg, sha1)) {
178cb243
LT
314 if (!*n)
315 n = "HEAD";
9938af6a 316 if (!get_sha1(n, end)) {
30b96fce
JH
317 show_rev(NORMAL, end, n);
318 show_rev(REVERSED, sha1, arg);
178cb243
LT
319 continue;
320 }
321 }
322 *dotdot = '.';
323 }
9938af6a 324 if (!get_sha1(arg, sha1)) {
30b96fce 325 show_rev(NORMAL, sha1, arg);
800644c5
LT
326 continue;
327 }
9938af6a 328 if (*arg == '^' && !get_sha1(arg+1, sha1)) {
30b96fce 329 show_rev(REVERSED, sha1, arg+1);
800644c5
LT
330 continue;
331 }
4866ccf0
JH
332 if (verify)
333 die("Needed a single revision");
b33aba51
JH
334 if ((filter & DO_REVS) &&
335 (filter & DO_NONFLAGS) && /* !def && */
336 lstat(arg, &st) < 0)
d8f6b342 337 die("'%s': %s", arg, strerror(errno));
af13cdf2 338 as_is = 1;
7a3dd472 339 show_file(arg);
023d66ed
LT
340 }
341 show_default();
4866ccf0
JH
342 if (verify && revs_count != 1)
343 die("Needed a single revision");
178cb243
LT
344 return 0;
345}