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Commit | Line | Data |
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bc5c5ec0 | 1 | #include "builtin.h" |
b2141fc1 | 2 | #include "config.h" |
f394e093 | 3 | #include "gettext.h" |
d1cbe1e6 | 4 | #include "hash.h" |
66bf85a4 | 5 | #include "refs.h" |
dabab1d6 | 6 | #include "object-name.h" |
89942be6 | 7 | #include "parse-options.h" |
c750ba95 | 8 | #include "quote.h" |
d1cbe1e6 | 9 | #include "repository.h" |
dbbcd44f | 10 | #include "strvec.h" |
66bf85a4 | 11 | |
89942be6 | 12 | static const char * const git_update_ref_usage[] = { |
9c9b4f2f AH |
13 | N_("git update-ref [<options>] -d <refname> [<old-val>]"), |
14 | N_("git update-ref [<options>] <refname> <new-val> [<old-val>]"), | |
15 | N_("git update-ref [<options>] --stdin [-z]"), | |
89942be6 PH |
16 | NULL |
17 | }; | |
152da3df | 18 | |
c750ba95 | 19 | static char line_termination = '\n'; |
e4c34855 | 20 | static unsigned int update_flags; |
d345e9fb | 21 | static unsigned int default_flags; |
144c76fa | 22 | static unsigned create_reflog_flag; |
db7516ab | 23 | static const char *msg; |
c750ba95 | 24 | |
697a4151 MH |
25 | /* |
26 | * Parse one whitespace- or NUL-terminated, possibly C-quoted argument | |
27 | * and append the result to arg. Return a pointer to the terminator. | |
28 | * Die if there is an error in how the argument is C-quoted. This | |
29 | * function is only used if not -z. | |
30 | */ | |
c750ba95 BK |
31 | static const char *parse_arg(const char *next, struct strbuf *arg) |
32 | { | |
697a4151 MH |
33 | if (*next == '"') { |
34 | const char *orig = next; | |
35 | ||
36 | if (unquote_c_style(arg, next, &next)) | |
37 | die("badly quoted argument: %s", orig); | |
38 | if (*next && !isspace(*next)) | |
39 | die("unexpected character after quoted argument: %s", orig); | |
40 | } else { | |
c750ba95 BK |
41 | while (*next && !isspace(*next)) |
42 | strbuf_addch(arg, *next++); | |
697a4151 | 43 | } |
c750ba95 | 44 | |
c750ba95 BK |
45 | return next; |
46 | } | |
47 | ||
e23d8435 | 48 | /* |
ed410e61 MH |
49 | * Parse the reference name immediately after "command SP". If not |
50 | * -z, then handle C-quoting. Return a pointer to a newly allocated | |
51 | * string containing the name of the reference, or NULL if there was | |
52 | * an error. Update *next to point at the character that terminates | |
53 | * the argument. Die if C-quoting is malformed or the reference name | |
54 | * is invalid. | |
e23d8435 | 55 | */ |
5ae6c5a7 | 56 | static char *parse_refname(const char **next) |
c750ba95 | 57 | { |
ed410e61 MH |
58 | struct strbuf ref = STRBUF_INIT; |
59 | ||
c750ba95 BK |
60 | if (line_termination) { |
61 | /* Without -z, use the next argument */ | |
ed410e61 | 62 | *next = parse_arg(*next, &ref); |
c750ba95 | 63 | } else { |
e23d8435 | 64 | /* With -z, use everything up to the next NUL */ |
ed410e61 MH |
65 | strbuf_addstr(&ref, *next); |
66 | *next += ref.len; | |
67 | } | |
68 | ||
69 | if (!ref.len) { | |
70 | strbuf_release(&ref); | |
71 | return NULL; | |
c750ba95 | 72 | } |
ed410e61 MH |
73 | |
74 | if (check_refname_format(ref.buf, REFNAME_ALLOW_ONELEVEL)) | |
75 | die("invalid ref format: %s", ref.buf); | |
76 | ||
77 | return strbuf_detach(&ref, NULL); | |
c750ba95 BK |
78 | } |
79 | ||
e23d8435 | 80 | /* |
3afcc463 MH |
81 | * The value being parsed is <oldvalue> (as opposed to <newvalue>; the |
82 | * difference affects which error messages are generated): | |
83 | */ | |
84 | #define PARSE_SHA1_OLD 0x01 | |
85 | ||
86 | /* | |
87 | * For backwards compatibility, accept an empty string for update's | |
88 | * <newvalue> in binary mode to be equivalent to specifying zeros. | |
89 | */ | |
90 | #define PARSE_SHA1_ALLOW_EMPTY 0x02 | |
91 | ||
92 | /* | |
93 | * Parse an argument separator followed by the next argument, if any. | |
94 | * If there is an argument, convert it to a SHA-1, write it to sha1, | |
95 | * set *next to point at the character terminating the argument, and | |
e23d8435 | 96 | * return 0. If there is no argument at all (not even the empty |
3afcc463 MH |
97 | * string), return 1 and leave *next unchanged. If the value is |
98 | * provided but cannot be converted to a SHA-1, die. flags can | |
99 | * include PARSE_SHA1_OLD and/or PARSE_SHA1_ALLOW_EMPTY. | |
e23d8435 | 100 | */ |
804dba54 | 101 | static int parse_next_oid(const char **next, const char *end, |
a0bb5535 | 102 | struct object_id *oid, |
103 | const char *command, const char *refname, | |
104 | int flags) | |
c750ba95 | 105 | { |
3afcc463 MH |
106 | struct strbuf arg = STRBUF_INIT; |
107 | int ret = 0; | |
108 | ||
804dba54 | 109 | if (*next == end) |
3afcc463 MH |
110 | goto eof; |
111 | ||
c750ba95 BK |
112 | if (line_termination) { |
113 | /* Without -z, consume SP and use next argument */ | |
e23d8435 | 114 | if (!**next || **next == line_termination) |
3afcc463 | 115 | return 1; |
e23d8435 | 116 | if (**next != ' ') |
3afcc463 MH |
117 | die("%s %s: expected SP but got: %s", |
118 | command, refname, *next); | |
e23d8435 | 119 | (*next)++; |
3afcc463 MH |
120 | *next = parse_arg(*next, &arg); |
121 | if (arg.len) { | |
d850b7a5 | 122 | if (repo_get_oid(the_repository, arg.buf, oid)) |
3afcc463 MH |
123 | goto invalid; |
124 | } else { | |
125 | /* Without -z, an empty value means all zeros: */ | |
a0bb5535 | 126 | oidclr(oid); |
3afcc463 | 127 | } |
c750ba95 BK |
128 | } else { |
129 | /* With -z, read the next NUL-terminated line */ | |
e23d8435 | 130 | if (**next) |
3afcc463 MH |
131 | die("%s %s: expected NUL but got: %s", |
132 | command, refname, *next); | |
e23d8435 | 133 | (*next)++; |
804dba54 | 134 | if (*next == end) |
3afcc463 MH |
135 | goto eof; |
136 | strbuf_addstr(&arg, *next); | |
137 | *next += arg.len; | |
138 | ||
139 | if (arg.len) { | |
d850b7a5 | 140 | if (repo_get_oid(the_repository, arg.buf, oid)) |
3afcc463 MH |
141 | goto invalid; |
142 | } else if (flags & PARSE_SHA1_ALLOW_EMPTY) { | |
143 | /* With -z, treat an empty value as all zeros: */ | |
1fbd5049 MH |
144 | warning("%s %s: missing <newvalue>, treating as zero", |
145 | command, refname); | |
a0bb5535 | 146 | oidclr(oid); |
3afcc463 MH |
147 | } else { |
148 | /* | |
149 | * With -z, an empty non-required value means | |
150 | * unspecified: | |
151 | */ | |
152 | ret = 1; | |
153 | } | |
c750ba95 | 154 | } |
3afcc463 MH |
155 | |
156 | strbuf_release(&arg); | |
157 | ||
158 | return ret; | |
159 | ||
160 | invalid: | |
161 | die(flags & PARSE_SHA1_OLD ? | |
162 | "%s %s: invalid <oldvalue>: %s" : | |
163 | "%s %s: invalid <newvalue>: %s", | |
164 | command, refname, arg.buf); | |
165 | ||
166 | eof: | |
167 | die(flags & PARSE_SHA1_OLD ? | |
726f6916 MH |
168 | "%s %s: unexpected end of input when reading <oldvalue>" : |
169 | "%s %s: unexpected end of input when reading <newvalue>", | |
3afcc463 | 170 | command, refname); |
c750ba95 BK |
171 | } |
172 | ||
e23d8435 MH |
173 | |
174 | /* | |
175 | * The following five parse_cmd_*() functions parse the corresponding | |
176 | * command. In each case, next points at the character following the | |
177 | * command name and the following space. They each return a pointer | |
178 | * to the character terminating the command, and die with an | |
179 | * explanatory message if there are any parsing problems. All of | |
180 | * these functions handle either text or binary format input, | |
181 | * depending on how line_termination is set. | |
182 | */ | |
183 | ||
94fd491a PS |
184 | static void parse_cmd_update(struct ref_transaction *transaction, |
185 | const char *next, const char *end) | |
c750ba95 | 186 | { |
ab5ac957 | 187 | struct strbuf err = STRBUF_INIT; |
aebfc133 | 188 | char *refname; |
a0bb5535 | 189 | struct object_id new_oid, old_oid; |
aebfc133 | 190 | int have_old; |
c750ba95 | 191 | |
5ae6c5a7 | 192 | refname = parse_refname(&next); |
aebfc133 | 193 | if (!refname) |
f11b09fb | 194 | die("update: missing <ref>"); |
c750ba95 | 195 | |
804dba54 | 196 | if (parse_next_oid(&next, end, &new_oid, "update", refname, |
a0bb5535 | 197 | PARSE_SHA1_ALLOW_EMPTY)) |
aebfc133 | 198 | die("update %s: missing <newvalue>", refname); |
c750ba95 | 199 | |
804dba54 | 200 | have_old = !parse_next_oid(&next, end, &old_oid, "update", refname, |
a0bb5535 | 201 | PARSE_SHA1_OLD); |
3afcc463 MH |
202 | |
203 | if (*next != line_termination) | |
aebfc133 MH |
204 | die("update %s: extra input: %s", refname, next); |
205 | ||
1d147bdf | 206 | if (ref_transaction_update(transaction, refname, |
89f3bbdd | 207 | &new_oid, have_old ? &old_oid : NULL, |
144c76fa DT |
208 | update_flags | create_reflog_flag, |
209 | msg, &err)) | |
8e34800e | 210 | die("%s", err.buf); |
aebfc133 | 211 | |
d345e9fb | 212 | update_flags = default_flags; |
aebfc133 | 213 | free(refname); |
ab5ac957 | 214 | strbuf_release(&err); |
c750ba95 BK |
215 | } |
216 | ||
94fd491a PS |
217 | static void parse_cmd_create(struct ref_transaction *transaction, |
218 | const char *next, const char *end) | |
c750ba95 | 219 | { |
ab5ac957 | 220 | struct strbuf err = STRBUF_INIT; |
aebfc133 | 221 | char *refname; |
a0bb5535 | 222 | struct object_id new_oid; |
c750ba95 | 223 | |
5ae6c5a7 | 224 | refname = parse_refname(&next); |
aebfc133 | 225 | if (!refname) |
f11b09fb | 226 | die("create: missing <ref>"); |
c750ba95 | 227 | |
804dba54 | 228 | if (parse_next_oid(&next, end, &new_oid, "create", refname, 0)) |
aebfc133 | 229 | die("create %s: missing <newvalue>", refname); |
e23d8435 | 230 | |
a0bb5535 | 231 | if (is_null_oid(&new_oid)) |
aebfc133 | 232 | die("create %s: zero <newvalue>", refname); |
c750ba95 | 233 | |
e23d8435 | 234 | if (*next != line_termination) |
aebfc133 MH |
235 | die("create %s: extra input: %s", refname, next); |
236 | ||
89f3bbdd | 237 | if (ref_transaction_create(transaction, refname, &new_oid, |
144c76fa DT |
238 | update_flags | create_reflog_flag, |
239 | msg, &err)) | |
b416af5b | 240 | die("%s", err.buf); |
aebfc133 | 241 | |
d345e9fb | 242 | update_flags = default_flags; |
aebfc133 | 243 | free(refname); |
ab5ac957 | 244 | strbuf_release(&err); |
c750ba95 BK |
245 | } |
246 | ||
94fd491a PS |
247 | static void parse_cmd_delete(struct ref_transaction *transaction, |
248 | const char *next, const char *end) | |
c750ba95 | 249 | { |
ab5ac957 | 250 | struct strbuf err = STRBUF_INIT; |
aebfc133 | 251 | char *refname; |
a0bb5535 | 252 | struct object_id old_oid; |
aebfc133 | 253 | int have_old; |
c750ba95 | 254 | |
5ae6c5a7 | 255 | refname = parse_refname(&next); |
aebfc133 | 256 | if (!refname) |
f11b09fb | 257 | die("delete: missing <ref>"); |
c750ba95 | 258 | |
804dba54 | 259 | if (parse_next_oid(&next, end, &old_oid, "delete", refname, |
a0bb5535 | 260 | PARSE_SHA1_OLD)) { |
aebfc133 | 261 | have_old = 0; |
3afcc463 | 262 | } else { |
a0bb5535 | 263 | if (is_null_oid(&old_oid)) |
aebfc133 MH |
264 | die("delete %s: zero <oldvalue>", refname); |
265 | have_old = 1; | |
3afcc463 | 266 | } |
c750ba95 | 267 | |
e23d8435 | 268 | if (*next != line_termination) |
aebfc133 MH |
269 | die("delete %s: extra input: %s", refname, next); |
270 | ||
fb5a6bb6 | 271 | if (ref_transaction_delete(transaction, refname, |
89f3bbdd | 272 | have_old ? &old_oid : NULL, |
fb5a6bb6 | 273 | update_flags, msg, &err)) |
8c8bdc0d | 274 | die("%s", err.buf); |
aebfc133 | 275 | |
d345e9fb | 276 | update_flags = default_flags; |
aebfc133 | 277 | free(refname); |
ab5ac957 | 278 | strbuf_release(&err); |
c750ba95 BK |
279 | } |
280 | ||
94fd491a PS |
281 | static void parse_cmd_verify(struct ref_transaction *transaction, |
282 | const char *next, const char *end) | |
c750ba95 | 283 | { |
ab5ac957 | 284 | struct strbuf err = STRBUF_INIT; |
aebfc133 | 285 | char *refname; |
a0bb5535 | 286 | struct object_id old_oid; |
c750ba95 | 287 | |
5ae6c5a7 | 288 | refname = parse_refname(&next); |
aebfc133 | 289 | if (!refname) |
f11b09fb | 290 | die("verify: missing <ref>"); |
c750ba95 | 291 | |
804dba54 | 292 | if (parse_next_oid(&next, end, &old_oid, "verify", refname, |
a0bb5535 | 293 | PARSE_SHA1_OLD)) |
294 | oidclr(&old_oid); | |
0e729c7e | 295 | |
e23d8435 | 296 | if (*next != line_termination) |
aebfc133 MH |
297 | die("verify %s: extra input: %s", refname, next); |
298 | ||
89f3bbdd | 299 | if (ref_transaction_verify(transaction, refname, &old_oid, |
16180334 | 300 | update_flags, &err)) |
8e34800e | 301 | die("%s", err.buf); |
aebfc133 | 302 | |
d345e9fb | 303 | update_flags = default_flags; |
aebfc133 | 304 | free(refname); |
ab5ac957 | 305 | strbuf_release(&err); |
c750ba95 BK |
306 | } |
307 | ||
efa3d64c PS |
308 | static void report_ok(const char *command) |
309 | { | |
310 | fprintf(stdout, "%s: ok\n", command); | |
311 | fflush(stdout); | |
312 | } | |
313 | ||
94fd491a PS |
314 | static void parse_cmd_option(struct ref_transaction *transaction, |
315 | const char *next, const char *end) | |
c750ba95 | 316 | { |
aee9be2e SG |
317 | const char *rest; |
318 | if (skip_prefix(next, "no-deref", &rest) && *rest == line_termination) | |
91774afc | 319 | update_flags |= REF_NO_DEREF; |
c750ba95 BK |
320 | else |
321 | die("option unknown: %s", next); | |
322 | } | |
323 | ||
e48cf33b PS |
324 | static void parse_cmd_start(struct ref_transaction *transaction, |
325 | const char *next, const char *end) | |
326 | { | |
327 | if (*next != line_termination) | |
328 | die("start: extra input: %s", next); | |
efa3d64c | 329 | report_ok("start"); |
e48cf33b PS |
330 | } |
331 | ||
332 | static void parse_cmd_prepare(struct ref_transaction *transaction, | |
333 | const char *next, const char *end) | |
334 | { | |
335 | struct strbuf error = STRBUF_INIT; | |
336 | if (*next != line_termination) | |
337 | die("prepare: extra input: %s", next); | |
338 | if (ref_transaction_prepare(transaction, &error)) | |
339 | die("prepare: %s", error.buf); | |
efa3d64c | 340 | report_ok("prepare"); |
e48cf33b PS |
341 | } |
342 | ||
343 | static void parse_cmd_abort(struct ref_transaction *transaction, | |
344 | const char *next, const char *end) | |
345 | { | |
346 | struct strbuf error = STRBUF_INIT; | |
347 | if (*next != line_termination) | |
348 | die("abort: extra input: %s", next); | |
349 | if (ref_transaction_abort(transaction, &error)) | |
350 | die("abort: %s", error.buf); | |
efa3d64c | 351 | report_ok("abort"); |
e48cf33b PS |
352 | } |
353 | ||
354 | static void parse_cmd_commit(struct ref_transaction *transaction, | |
355 | const char *next, const char *end) | |
356 | { | |
357 | struct strbuf error = STRBUF_INIT; | |
358 | if (*next != line_termination) | |
359 | die("commit: extra input: %s", next); | |
360 | if (ref_transaction_commit(transaction, &error)) | |
361 | die("commit: %s", error.buf); | |
efa3d64c | 362 | report_ok("commit"); |
e48cf33b PS |
363 | ref_transaction_free(transaction); |
364 | } | |
365 | ||
366 | enum update_refs_state { | |
367 | /* Non-transactional state open for updates. */ | |
368 | UPDATE_REFS_OPEN, | |
369 | /* A transaction has been started. */ | |
370 | UPDATE_REFS_STARTED, | |
371 | /* References are locked and ready for commit */ | |
372 | UPDATE_REFS_PREPARED, | |
373 | /* Transaction has been committed or closed. */ | |
374 | UPDATE_REFS_CLOSED, | |
375 | }; | |
376 | ||
a65b8ac2 PS |
377 | static const struct parse_cmd { |
378 | const char *prefix; | |
94fd491a PS |
379 | void (*fn)(struct ref_transaction *, const char *, const char *); |
380 | unsigned args; | |
e48cf33b | 381 | enum update_refs_state state; |
a65b8ac2 | 382 | } command[] = { |
e48cf33b PS |
383 | { "update", parse_cmd_update, 3, UPDATE_REFS_OPEN }, |
384 | { "create", parse_cmd_create, 2, UPDATE_REFS_OPEN }, | |
385 | { "delete", parse_cmd_delete, 2, UPDATE_REFS_OPEN }, | |
386 | { "verify", parse_cmd_verify, 2, UPDATE_REFS_OPEN }, | |
387 | { "option", parse_cmd_option, 1, UPDATE_REFS_OPEN }, | |
388 | { "start", parse_cmd_start, 0, UPDATE_REFS_STARTED }, | |
389 | { "prepare", parse_cmd_prepare, 0, UPDATE_REFS_PREPARED }, | |
390 | { "abort", parse_cmd_abort, 0, UPDATE_REFS_CLOSED }, | |
391 | { "commit", parse_cmd_commit, 0, UPDATE_REFS_CLOSED }, | |
a65b8ac2 PS |
392 | }; |
393 | ||
de0e0d65 | 394 | static void update_refs_stdin(void) |
c750ba95 | 395 | { |
de0e0d65 | 396 | struct strbuf input = STRBUF_INIT, err = STRBUF_INIT; |
e48cf33b | 397 | enum update_refs_state state = UPDATE_REFS_OPEN; |
de0e0d65 | 398 | struct ref_transaction *transaction; |
94fd491a | 399 | int i, j; |
de0e0d65 PS |
400 | |
401 | transaction = ref_transaction_begin(&err); | |
402 | if (!transaction) | |
403 | die("%s", err.buf); | |
404 | ||
c750ba95 | 405 | /* Read each line dispatch its command */ |
94fd491a | 406 | while (!strbuf_getwholeline(&input, stdin, line_termination)) { |
a65b8ac2 PS |
407 | const struct parse_cmd *cmd = NULL; |
408 | ||
94fd491a | 409 | if (*input.buf == line_termination) |
c750ba95 | 410 | die("empty command in input"); |
94fd491a PS |
411 | else if (isspace(*input.buf)) |
412 | die("whitespace before command: %s", input.buf); | |
a65b8ac2 PS |
413 | |
414 | for (i = 0; i < ARRAY_SIZE(command); i++) { | |
415 | const char *prefix = command[i].prefix; | |
94fd491a | 416 | char c; |
a65b8ac2 | 417 | |
94fd491a PS |
418 | if (!starts_with(input.buf, prefix)) |
419 | continue; | |
420 | ||
421 | /* | |
422 | * If the command has arguments, verify that it's | |
423 | * followed by a space. Otherwise, it shall be followed | |
424 | * by a line terminator. | |
425 | */ | |
426 | c = command[i].args ? ' ' : line_termination; | |
427 | if (input.buf[strlen(prefix)] != c) | |
a65b8ac2 PS |
428 | continue; |
429 | ||
430 | cmd = &command[i]; | |
431 | break; | |
432 | } | |
433 | if (!cmd) | |
94fd491a PS |
434 | die("unknown command: %s", input.buf); |
435 | ||
436 | /* | |
437 | * Read additional arguments if NUL-terminated. Do not raise an | |
438 | * error in case there is an early EOF to let the command | |
439 | * handle missing arguments with a proper error message. | |
440 | */ | |
441 | for (j = 1; line_termination == '\0' && j < cmd->args; j++) | |
442 | if (strbuf_appendwholeline(&input, stdin, line_termination)) | |
443 | break; | |
444 | ||
e48cf33b PS |
445 | switch (state) { |
446 | case UPDATE_REFS_OPEN: | |
447 | case UPDATE_REFS_STARTED: | |
8c4417f1 PS |
448 | if (state == UPDATE_REFS_STARTED && cmd->state == UPDATE_REFS_STARTED) |
449 | die("cannot restart ongoing transaction"); | |
e48cf33b PS |
450 | /* Do not downgrade a transaction to a non-transaction. */ |
451 | if (cmd->state >= state) | |
452 | state = cmd->state; | |
453 | break; | |
454 | case UPDATE_REFS_PREPARED: | |
455 | if (cmd->state != UPDATE_REFS_CLOSED) | |
456 | die("prepared transactions can only be closed"); | |
457 | state = cmd->state; | |
458 | break; | |
459 | case UPDATE_REFS_CLOSED: | |
262a4d28 PS |
460 | if (cmd->state != UPDATE_REFS_STARTED) |
461 | die("transaction is closed"); | |
462 | ||
463 | /* | |
464 | * Open a new transaction if we're currently closed and | |
465 | * get a "start". | |
466 | */ | |
467 | state = cmd->state; | |
468 | transaction = ref_transaction_begin(&err); | |
469 | if (!transaction) | |
470 | die("%s", err.buf); | |
471 | ||
e48cf33b PS |
472 | break; |
473 | } | |
474 | ||
94fd491a PS |
475 | cmd->fn(transaction, input.buf + strlen(cmd->prefix) + !!cmd->args, |
476 | input.buf + input.len); | |
e23d8435 | 477 | } |
c750ba95 | 478 | |
e48cf33b PS |
479 | switch (state) { |
480 | case UPDATE_REFS_OPEN: | |
481 | /* Commit by default if no transaction was requested. */ | |
482 | if (ref_transaction_commit(transaction, &err)) | |
483 | die("%s", err.buf); | |
484 | ref_transaction_free(transaction); | |
485 | break; | |
486 | case UPDATE_REFS_STARTED: | |
487 | case UPDATE_REFS_PREPARED: | |
488 | /* If using a transaction, we want to abort it. */ | |
489 | if (ref_transaction_abort(transaction, &err)) | |
490 | die("%s", err.buf); | |
491 | break; | |
492 | case UPDATE_REFS_CLOSED: | |
493 | /* Otherwise no need to do anything, the transaction was closed already. */ | |
494 | break; | |
495 | } | |
de0e0d65 | 496 | |
de0e0d65 | 497 | strbuf_release(&err); |
e23d8435 | 498 | strbuf_release(&input); |
c750ba95 BK |
499 | } |
500 | ||
a633fca0 | 501 | int cmd_update_ref(int argc, const char **argv, const char *prefix) |
66bf85a4 | 502 | { |
db7516ab | 503 | const char *refname, *oldval; |
a0bb5535 | 504 | struct object_id oid, oldoid; |
fec14ec3 | 505 | int delete = 0, no_deref = 0, read_stdin = 0, end_null = 0; |
144c76fa | 506 | int create_reflog = 0; |
89942be6 | 507 | struct option options[] = { |
82269505 | 508 | OPT_STRING( 'm', NULL, &msg, N_("reason"), N_("reason of the update")), |
d5d09d47 SB |
509 | OPT_BOOL('d', NULL, &delete, N_("delete the reference")), |
510 | OPT_BOOL( 0 , "no-deref", &no_deref, | |
82269505 | 511 | N_("update <refname> not the one it points to")), |
9a86b899 JH |
512 | OPT_BOOL('z', NULL, &end_null, N_("stdin has NUL-terminated arguments")), |
513 | OPT_BOOL( 0 , "stdin", &read_stdin, N_("read updates from stdin")), | |
98c32bd8 | 514 | OPT_BOOL( 0 , "create-reflog", &create_reflog, N_("create a reflog")), |
89942be6 PH |
515 | OPT_END(), |
516 | }; | |
66bf85a4 | 517 | |
ef90d6d4 | 518 | git_config(git_default_config, NULL); |
37782920 SB |
519 | argc = parse_options(argc, argv, prefix, options, git_update_ref_usage, |
520 | 0); | |
89942be6 PH |
521 | if (msg && !*msg) |
522 | die("Refusing to perform update with empty message."); | |
5b16b090 | 523 | |
144c76fa DT |
524 | create_reflog_flag = create_reflog ? REF_FORCE_CREATE_REFLOG : 0; |
525 | ||
d345e9fb EN |
526 | if (no_deref) { |
527 | default_flags = REF_NO_DEREF; | |
528 | update_flags = default_flags; | |
529 | } | |
530 | ||
c750ba95 | 531 | if (read_stdin) { |
d345e9fb | 532 | if (delete || argc > 0) |
c750ba95 BK |
533 | usage_with_options(git_update_ref_usage, options); |
534 | if (end_null) | |
535 | line_termination = '\0'; | |
de0e0d65 | 536 | update_refs_stdin(); |
8bcd3748 | 537 | return 0; |
c750ba95 BK |
538 | } |
539 | ||
540 | if (end_null) | |
541 | usage_with_options(git_update_ref_usage, options); | |
542 | ||
ac5409e4 | 543 | if (delete) { |
3fe8dce6 | 544 | if (argc < 1 || argc > 2) |
973a70ea KW |
545 | usage_with_options(git_update_ref_usage, options); |
546 | refname = argv[0]; | |
547 | oldval = argv[1]; | |
548 | } else { | |
549 | const char *value; | |
550 | if (argc < 2 || argc > 3) | |
89942be6 | 551 | usage_with_options(git_update_ref_usage, options); |
973a70ea KW |
552 | refname = argv[0]; |
553 | value = argv[1]; | |
554 | oldval = argv[2]; | |
d850b7a5 | 555 | if (repo_get_oid(the_repository, value, &oid)) |
973a70ea | 556 | die("%s: not a valid SHA1", value); |
ac5409e4 JH |
557 | } |
558 | ||
e2991c80 MH |
559 | if (oldval) { |
560 | if (!*oldval) | |
561 | /* | |
562 | * The empty string implies that the reference | |
563 | * must not already exist: | |
564 | */ | |
a0bb5535 | 565 | oidclr(&oldoid); |
d850b7a5 | 566 | else if (repo_get_oid(the_repository, oldval, &oldoid)) |
e2991c80 MH |
567 | die("%s: not a valid old SHA1", oldval); |
568 | } | |
66bf85a4 | 569 | |
973a70ea | 570 | if (delete) |
1c03c4d3 MH |
571 | /* |
572 | * For purposes of backwards compatibility, we treat | |
573 | * NULL_SHA1 as "don't care" here: | |
574 | */ | |
de922669 | 575 | return delete_ref(msg, refname, |
2616a5e5 | 576 | (oldval && !is_null_oid(&oldoid)) ? &oldoid : NULL, |
d345e9fb | 577 | default_flags); |
973a70ea | 578 | else |
ae077771 | 579 | return update_ref(msg, refname, &oid, oldval ? &oldoid : NULL, |
d345e9fb | 580 | default_flags | create_reflog_flag, |
144c76fa | 581 | UPDATE_REFS_DIE_ON_ERR); |
66bf85a4 | 582 | } |