rev-list: allow -n<n> as shorthand for --max-count=<n>
[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
56 for (;;) {
57 const char *str = *p++;
58 int len;
59 if (!str)
60 return 0;
61 len = strlen(str);
4866ccf0
JH
62 if (!strcmp(arg, str) ||
63 (str[len-1] == '=' && !strncmp(arg, str, len)))
921d865e
LT
64 return 1;
65 }
66}
67
4866ccf0 68/* Output argument as a string, either SQ or normal */
5bb2c65a
JH
69static void show(const char *arg)
70{
71 if (output_sq) {
72 int sq = '\'', ch;
73
74 putchar(sq);
75 while ((ch = *arg++)) {
76 if (ch == sq)
77 fputs("'\\'", stdout);
78 putchar(ch);
79 }
80 putchar(sq);
81 putchar(' ');
82 }
83 else
84 puts(arg);
85}
86
4866ccf0 87/* Output a revision, only if filter allows it */
30b96fce 88static void show_rev(int type, const unsigned char *sha1, const char *name)
023d66ed 89{
4866ccf0 90 if (!(filter & DO_REVS))
023d66ed 91 return;
4866ccf0
JH
92 def = NULL;
93 revs_count++;
5bb2c65a 94
30b96fce
JH
95 if (type != show_type)
96 putchar('^');
97 if (symbolic && name)
98 show(name);
d5012508
JH
99 else if (abbrev)
100 show(find_unique_abbrev(sha1, abbrev));
30b96fce
JH
101 else
102 show(sha1_to_hex(sha1));
023d66ed
LT
103}
104
4866ccf0
JH
105/* Output a flag, only if filter allows it. */
106static void show_flag(char *arg)
023d66ed 107{
4866ccf0 108 if (!(filter & DO_FLAGS))
023d66ed 109 return;
4866ccf0 110 if (filter & (is_rev_argument(arg) ? DO_REVS : DO_NOREV))
0360e99d 111 show(arg);
023d66ed
LT
112}
113
023d66ed
LT
114static void show_default(void)
115{
116 char *s = def;
117
118 if (s) {
119 unsigned char sha1[20];
120
121 def = NULL;
9938af6a 122 if (!get_sha1(s, sha1)) {
30b96fce 123 show_rev(NORMAL, sha1, s);
023d66ed
LT
124 return;
125 }
023d66ed
LT
126 }
127}
128
960bba0d
LT
129static int show_reference(const char *refname, const unsigned char *sha1)
130{
30b96fce 131 show_rev(NORMAL, sha1, refname);
960bba0d
LT
132 return 0;
133}
134
c1babb1d
LT
135static void show_datestring(const char *flag, const char *datestr)
136{
c1babb1d 137 static char buffer[100];
c1babb1d
LT
138
139 /* date handling requires both flags and revs */
140 if ((filter & (DO_FLAGS | DO_REVS)) != (DO_FLAGS | DO_REVS))
141 return;
3c07b1d1 142 snprintf(buffer, sizeof(buffer), "%s%lu", flag, approxidate(datestr));
c1babb1d
LT
143 show(buffer);
144}
145
7a3dd472
LT
146static void show_file(const char *arg)
147{
7b34c2fa 148 show_default();
7a3dd472
LT
149 if ((filter & (DO_NONFLAGS|DO_NOREV)) == (DO_NONFLAGS|DO_NOREV))
150 show(arg);
151}
152
178cb243
LT
153int main(int argc, char **argv)
154{
4866ccf0 155 int i, as_is = 0, verify = 0;
178cb243 156 unsigned char sha1[20];
d288a700
LT
157 const char *prefix = setup_git_directory();
158
178cb243 159 for (i = 1; i < argc; i++) {
d8f6b342 160 struct stat st;
178cb243
LT
161 char *arg = argv[i];
162 char *dotdot;
163
164 if (as_is) {
7a3dd472 165 show_file(arg);
178cb243
LT
166 continue;
167 }
3af06987
EW
168 if (!strcmp(arg,"-n")) {
169 if (++i >= argc)
170 die("-n requires an argument");
171 if ((filter & DO_FLAGS) && (filter & DO_REVS)) {
172 show(arg);
173 show(argv[i]);
174 }
175 continue;
176 }
177 if (!strncmp(arg,"-n",2)) {
178 if ((filter & DO_FLAGS) && (filter & DO_REVS))
179 show(arg);
180 continue;
181 }
182
178cb243
LT
183 if (*arg == '-') {
184 if (!strcmp(arg, "--")) {
178cb243 185 as_is = 1;
a08b6505
LT
186 /* Pass on the "--" if we show anything but files.. */
187 if (filter & (DO_FLAGS | DO_REVS))
188 show_file(arg);
4866ccf0 189 continue;
178cb243
LT
190 }
191 if (!strcmp(arg, "--default")) {
178cb243
LT
192 def = argv[i+1];
193 i++;
194 continue;
195 }
8ebb0184 196 if (!strcmp(arg, "--revs-only")) {
4866ccf0 197 filter &= ~DO_NOREV;
8ebb0184
LT
198 continue;
199 }
200 if (!strcmp(arg, "--no-revs")) {
4866ccf0 201 filter &= ~DO_REVS;
8ebb0184
LT
202 continue;
203 }
f79b65aa 204 if (!strcmp(arg, "--flags")) {
4866ccf0 205 filter &= ~DO_NONFLAGS;
f79b65aa
LT
206 continue;
207 }
208 if (!strcmp(arg, "--no-flags")) {
4866ccf0 209 filter &= ~DO_FLAGS;
f79b65aa
LT
210 continue;
211 }
023d66ed 212 if (!strcmp(arg, "--verify")) {
4866ccf0
JH
213 filter &= ~(DO_FLAGS|DO_NOREV);
214 verify = 1;
023d66ed 215 continue;
921d865e 216 }
62a604ba
JH
217 if (!strcmp(arg, "--short") ||
218 !strncmp(arg, "--short=", 9)) {
d5012508
JH
219 filter &= ~(DO_FLAGS|DO_NOREV);
220 verify = 1;
221 abbrev = DEFAULT_ABBREV;
222 if (arg[8] == '=')
223 abbrev = strtoul(arg + 9, NULL, 10);
1dc4fb84
JH
224 if (abbrev < MINIMUM_ABBREV)
225 abbrev = MINIMUM_ABBREV;
226 else if (40 <= abbrev)
227 abbrev = 40;
d5012508
JH
228 continue;
229 }
5bb2c65a
JH
230 if (!strcmp(arg, "--sq")) {
231 output_sq = 1;
232 continue;
233 }
042a4ed7
LT
234 if (!strcmp(arg, "--not")) {
235 show_type ^= REVERSED;
236 continue;
237 }
30b96fce
JH
238 if (!strcmp(arg, "--symbolic")) {
239 symbolic = 1;
240 continue;
241 }
960bba0d
LT
242 if (!strcmp(arg, "--all")) {
243 for_each_ref(show_reference);
244 continue;
245 }
d288a700 246 if (!strcmp(arg, "--show-prefix")) {
4866ccf0
JH
247 if (prefix)
248 puts(prefix);
d288a700
LT
249 continue;
250 }
5f94c730
JH
251 if (!strcmp(arg, "--show-cdup")) {
252 const char *pfx = prefix;
253 while (pfx) {
254 pfx = strchr(pfx, '/');
255 if (pfx) {
256 pfx++;
257 printf("../");
258 }
259 }
260 putchar('\n');
261 continue;
262 }
a8783eeb
LT
263 if (!strcmp(arg, "--git-dir")) {
264 const char *gitdir = getenv(GIT_DIR_ENVIRONMENT);
265 static char cwd[PATH_MAX];
266 if (gitdir) {
267 puts(gitdir);
268 continue;
269 }
270 if (!prefix) {
271 puts(".git");
272 continue;
273 }
274 if (!getcwd(cwd, PATH_MAX))
275 die("unable to get current working directory");
276 printf("%s/.git\n", cwd);
277 continue;
278 }
c1babb1d
LT
279 if (!strncmp(arg, "--since=", 8)) {
280 show_datestring("--max-age=", arg+8);
281 continue;
282 }
283 if (!strncmp(arg, "--after=", 8)) {
284 show_datestring("--max-age=", arg+8);
285 continue;
286 }
287 if (!strncmp(arg, "--before=", 9)) {
288 show_datestring("--min-age=", arg+9);
289 continue;
290 }
291 if (!strncmp(arg, "--until=", 8)) {
292 show_datestring("--min-age=", arg+8);
293 continue;
294 }
4866ccf0
JH
295 if (verify)
296 die("Needed a single revision");
297 show_flag(arg);
178cb243
LT
298 continue;
299 }
4866ccf0
JH
300
301 /* Not a flag argument */
178cb243
LT
302 dotdot = strstr(arg, "..");
303 if (dotdot) {
304 unsigned char end[20];
305 char *n = dotdot+2;
306 *dotdot = 0;
9938af6a 307 if (!get_sha1(arg, sha1)) {
178cb243
LT
308 if (!*n)
309 n = "HEAD";
9938af6a 310 if (!get_sha1(n, end)) {
30b96fce
JH
311 show_rev(NORMAL, end, n);
312 show_rev(REVERSED, sha1, arg);
178cb243
LT
313 continue;
314 }
315 }
316 *dotdot = '.';
317 }
9938af6a 318 if (!get_sha1(arg, sha1)) {
30b96fce 319 show_rev(NORMAL, sha1, arg);
800644c5
LT
320 continue;
321 }
9938af6a 322 if (*arg == '^' && !get_sha1(arg+1, sha1)) {
30b96fce 323 show_rev(REVERSED, sha1, arg+1);
800644c5
LT
324 continue;
325 }
4866ccf0
JH
326 if (verify)
327 die("Needed a single revision");
b33aba51
JH
328 if ((filter & DO_REVS) &&
329 (filter & DO_NONFLAGS) && /* !def && */
330 lstat(arg, &st) < 0)
d8f6b342 331 die("'%s': %s", arg, strerror(errno));
af13cdf2 332 as_is = 1;
7a3dd472 333 show_file(arg);
023d66ed
LT
334 }
335 show_default();
4866ccf0
JH
336 if (verify && revs_count != 1)
337 die("Needed a single revision");
178cb243
LT
338 return 0;
339}