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Commit | Line | Data |
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66bf85a4 | 1 | #include "cache.h" |
b2141fc1 | 2 | #include "config.h" |
f394e093 | 3 | #include "gettext.h" |
d1cbe1e6 | 4 | #include "hash.h" |
66bf85a4 | 5 | #include "refs.h" |
854b4629 | 6 | #include "builtin.h" |
dabab1d6 | 7 | #include "object-name.h" |
89942be6 | 8 | #include "parse-options.h" |
c750ba95 | 9 | #include "quote.h" |
d1cbe1e6 | 10 | #include "repository.h" |
dbbcd44f | 11 | #include "strvec.h" |
66bf85a4 | 12 | |
89942be6 | 13 | static const char * const git_update_ref_usage[] = { |
9c9b4f2f AH |
14 | N_("git update-ref [<options>] -d <refname> [<old-val>]"), |
15 | N_("git update-ref [<options>] <refname> <new-val> [<old-val>]"), | |
16 | N_("git update-ref [<options>] --stdin [-z]"), | |
89942be6 PH |
17 | NULL |
18 | }; | |
152da3df | 19 | |
c750ba95 | 20 | static char line_termination = '\n'; |
e4c34855 | 21 | static unsigned int update_flags; |
d345e9fb | 22 | static unsigned int default_flags; |
144c76fa | 23 | static unsigned create_reflog_flag; |
db7516ab | 24 | static const char *msg; |
c750ba95 | 25 | |
697a4151 MH |
26 | /* |
27 | * Parse one whitespace- or NUL-terminated, possibly C-quoted argument | |
28 | * and append the result to arg. Return a pointer to the terminator. | |
29 | * Die if there is an error in how the argument is C-quoted. This | |
30 | * function is only used if not -z. | |
31 | */ | |
c750ba95 BK |
32 | static const char *parse_arg(const char *next, struct strbuf *arg) |
33 | { | |
697a4151 MH |
34 | if (*next == '"') { |
35 | const char *orig = next; | |
36 | ||
37 | if (unquote_c_style(arg, next, &next)) | |
38 | die("badly quoted argument: %s", orig); | |
39 | if (*next && !isspace(*next)) | |
40 | die("unexpected character after quoted argument: %s", orig); | |
41 | } else { | |
c750ba95 BK |
42 | while (*next && !isspace(*next)) |
43 | strbuf_addch(arg, *next++); | |
697a4151 | 44 | } |
c750ba95 | 45 | |
c750ba95 BK |
46 | return next; |
47 | } | |
48 | ||
e23d8435 | 49 | /* |
ed410e61 MH |
50 | * Parse the reference name immediately after "command SP". If not |
51 | * -z, then handle C-quoting. Return a pointer to a newly allocated | |
52 | * string containing the name of the reference, or NULL if there was | |
53 | * an error. Update *next to point at the character that terminates | |
54 | * the argument. Die if C-quoting is malformed or the reference name | |
55 | * is invalid. | |
e23d8435 | 56 | */ |
5ae6c5a7 | 57 | static char *parse_refname(const char **next) |
c750ba95 | 58 | { |
ed410e61 MH |
59 | struct strbuf ref = STRBUF_INIT; |
60 | ||
c750ba95 BK |
61 | if (line_termination) { |
62 | /* Without -z, use the next argument */ | |
ed410e61 | 63 | *next = parse_arg(*next, &ref); |
c750ba95 | 64 | } else { |
e23d8435 | 65 | /* With -z, use everything up to the next NUL */ |
ed410e61 MH |
66 | strbuf_addstr(&ref, *next); |
67 | *next += ref.len; | |
68 | } | |
69 | ||
70 | if (!ref.len) { | |
71 | strbuf_release(&ref); | |
72 | return NULL; | |
c750ba95 | 73 | } |
ed410e61 MH |
74 | |
75 | if (check_refname_format(ref.buf, REFNAME_ALLOW_ONELEVEL)) | |
76 | die("invalid ref format: %s", ref.buf); | |
77 | ||
78 | return strbuf_detach(&ref, NULL); | |
c750ba95 BK |
79 | } |
80 | ||
e23d8435 | 81 | /* |
3afcc463 MH |
82 | * The value being parsed is <oldvalue> (as opposed to <newvalue>; the |
83 | * difference affects which error messages are generated): | |
84 | */ | |
85 | #define PARSE_SHA1_OLD 0x01 | |
86 | ||
87 | /* | |
88 | * For backwards compatibility, accept an empty string for update's | |
89 | * <newvalue> in binary mode to be equivalent to specifying zeros. | |
90 | */ | |
91 | #define PARSE_SHA1_ALLOW_EMPTY 0x02 | |
92 | ||
93 | /* | |
94 | * Parse an argument separator followed by the next argument, if any. | |
95 | * If there is an argument, convert it to a SHA-1, write it to sha1, | |
96 | * set *next to point at the character terminating the argument, and | |
e23d8435 | 97 | * return 0. If there is no argument at all (not even the empty |
3afcc463 MH |
98 | * string), return 1 and leave *next unchanged. If the value is |
99 | * provided but cannot be converted to a SHA-1, die. flags can | |
100 | * include PARSE_SHA1_OLD and/or PARSE_SHA1_ALLOW_EMPTY. | |
e23d8435 | 101 | */ |
804dba54 | 102 | static int parse_next_oid(const char **next, const char *end, |
a0bb5535 | 103 | struct object_id *oid, |
104 | const char *command, const char *refname, | |
105 | int flags) | |
c750ba95 | 106 | { |
3afcc463 MH |
107 | struct strbuf arg = STRBUF_INIT; |
108 | int ret = 0; | |
109 | ||
804dba54 | 110 | if (*next == end) |
3afcc463 MH |
111 | goto eof; |
112 | ||
c750ba95 BK |
113 | if (line_termination) { |
114 | /* Without -z, consume SP and use next argument */ | |
e23d8435 | 115 | if (!**next || **next == line_termination) |
3afcc463 | 116 | return 1; |
e23d8435 | 117 | if (**next != ' ') |
3afcc463 MH |
118 | die("%s %s: expected SP but got: %s", |
119 | command, refname, *next); | |
e23d8435 | 120 | (*next)++; |
3afcc463 MH |
121 | *next = parse_arg(*next, &arg); |
122 | if (arg.len) { | |
d850b7a5 | 123 | if (repo_get_oid(the_repository, arg.buf, oid)) |
3afcc463 MH |
124 | goto invalid; |
125 | } else { | |
126 | /* Without -z, an empty value means all zeros: */ | |
a0bb5535 | 127 | oidclr(oid); |
3afcc463 | 128 | } |
c750ba95 BK |
129 | } else { |
130 | /* With -z, read the next NUL-terminated line */ | |
e23d8435 | 131 | if (**next) |
3afcc463 MH |
132 | die("%s %s: expected NUL but got: %s", |
133 | command, refname, *next); | |
e23d8435 | 134 | (*next)++; |
804dba54 | 135 | if (*next == end) |
3afcc463 MH |
136 | goto eof; |
137 | strbuf_addstr(&arg, *next); | |
138 | *next += arg.len; | |
139 | ||
140 | if (arg.len) { | |
d850b7a5 | 141 | if (repo_get_oid(the_repository, arg.buf, oid)) |
3afcc463 MH |
142 | goto invalid; |
143 | } else if (flags & PARSE_SHA1_ALLOW_EMPTY) { | |
144 | /* With -z, treat an empty value as all zeros: */ | |
1fbd5049 MH |
145 | warning("%s %s: missing <newvalue>, treating as zero", |
146 | command, refname); | |
a0bb5535 | 147 | oidclr(oid); |
3afcc463 MH |
148 | } else { |
149 | /* | |
150 | * With -z, an empty non-required value means | |
151 | * unspecified: | |
152 | */ | |
153 | ret = 1; | |
154 | } | |
c750ba95 | 155 | } |
3afcc463 MH |
156 | |
157 | strbuf_release(&arg); | |
158 | ||
159 | return ret; | |
160 | ||
161 | invalid: | |
162 | die(flags & PARSE_SHA1_OLD ? | |
163 | "%s %s: invalid <oldvalue>: %s" : | |
164 | "%s %s: invalid <newvalue>: %s", | |
165 | command, refname, arg.buf); | |
166 | ||
167 | eof: | |
168 | die(flags & PARSE_SHA1_OLD ? | |
726f6916 MH |
169 | "%s %s: unexpected end of input when reading <oldvalue>" : |
170 | "%s %s: unexpected end of input when reading <newvalue>", | |
3afcc463 | 171 | command, refname); |
c750ba95 BK |
172 | } |
173 | ||
e23d8435 MH |
174 | |
175 | /* | |
176 | * The following five parse_cmd_*() functions parse the corresponding | |
177 | * command. In each case, next points at the character following the | |
178 | * command name and the following space. They each return a pointer | |
179 | * to the character terminating the command, and die with an | |
180 | * explanatory message if there are any parsing problems. All of | |
181 | * these functions handle either text or binary format input, | |
182 | * depending on how line_termination is set. | |
183 | */ | |
184 | ||
94fd491a PS |
185 | static void parse_cmd_update(struct ref_transaction *transaction, |
186 | const char *next, const char *end) | |
c750ba95 | 187 | { |
ab5ac957 | 188 | struct strbuf err = STRBUF_INIT; |
aebfc133 | 189 | char *refname; |
a0bb5535 | 190 | struct object_id new_oid, old_oid; |
aebfc133 | 191 | int have_old; |
c750ba95 | 192 | |
5ae6c5a7 | 193 | refname = parse_refname(&next); |
aebfc133 | 194 | if (!refname) |
f11b09fb | 195 | die("update: missing <ref>"); |
c750ba95 | 196 | |
804dba54 | 197 | if (parse_next_oid(&next, end, &new_oid, "update", refname, |
a0bb5535 | 198 | PARSE_SHA1_ALLOW_EMPTY)) |
aebfc133 | 199 | die("update %s: missing <newvalue>", refname); |
c750ba95 | 200 | |
804dba54 | 201 | have_old = !parse_next_oid(&next, end, &old_oid, "update", refname, |
a0bb5535 | 202 | PARSE_SHA1_OLD); |
3afcc463 MH |
203 | |
204 | if (*next != line_termination) | |
aebfc133 MH |
205 | die("update %s: extra input: %s", refname, next); |
206 | ||
1d147bdf | 207 | if (ref_transaction_update(transaction, refname, |
89f3bbdd | 208 | &new_oid, have_old ? &old_oid : NULL, |
144c76fa DT |
209 | update_flags | create_reflog_flag, |
210 | msg, &err)) | |
8e34800e | 211 | die("%s", err.buf); |
aebfc133 | 212 | |
d345e9fb | 213 | update_flags = default_flags; |
aebfc133 | 214 | free(refname); |
ab5ac957 | 215 | strbuf_release(&err); |
c750ba95 BK |
216 | } |
217 | ||
94fd491a PS |
218 | static void parse_cmd_create(struct ref_transaction *transaction, |
219 | const char *next, const char *end) | |
c750ba95 | 220 | { |
ab5ac957 | 221 | struct strbuf err = STRBUF_INIT; |
aebfc133 | 222 | char *refname; |
a0bb5535 | 223 | struct object_id new_oid; |
c750ba95 | 224 | |
5ae6c5a7 | 225 | refname = parse_refname(&next); |
aebfc133 | 226 | if (!refname) |
f11b09fb | 227 | die("create: missing <ref>"); |
c750ba95 | 228 | |
804dba54 | 229 | if (parse_next_oid(&next, end, &new_oid, "create", refname, 0)) |
aebfc133 | 230 | die("create %s: missing <newvalue>", refname); |
e23d8435 | 231 | |
a0bb5535 | 232 | if (is_null_oid(&new_oid)) |
aebfc133 | 233 | die("create %s: zero <newvalue>", refname); |
c750ba95 | 234 | |
e23d8435 | 235 | if (*next != line_termination) |
aebfc133 MH |
236 | die("create %s: extra input: %s", refname, next); |
237 | ||
89f3bbdd | 238 | if (ref_transaction_create(transaction, refname, &new_oid, |
144c76fa DT |
239 | update_flags | create_reflog_flag, |
240 | msg, &err)) | |
b416af5b | 241 | die("%s", err.buf); |
aebfc133 | 242 | |
d345e9fb | 243 | update_flags = default_flags; |
aebfc133 | 244 | free(refname); |
ab5ac957 | 245 | strbuf_release(&err); |
c750ba95 BK |
246 | } |
247 | ||
94fd491a PS |
248 | static void parse_cmd_delete(struct ref_transaction *transaction, |
249 | const char *next, const char *end) | |
c750ba95 | 250 | { |
ab5ac957 | 251 | struct strbuf err = STRBUF_INIT; |
aebfc133 | 252 | char *refname; |
a0bb5535 | 253 | struct object_id old_oid; |
aebfc133 | 254 | int have_old; |
c750ba95 | 255 | |
5ae6c5a7 | 256 | refname = parse_refname(&next); |
aebfc133 | 257 | if (!refname) |
f11b09fb | 258 | die("delete: missing <ref>"); |
c750ba95 | 259 | |
804dba54 | 260 | if (parse_next_oid(&next, end, &old_oid, "delete", refname, |
a0bb5535 | 261 | PARSE_SHA1_OLD)) { |
aebfc133 | 262 | have_old = 0; |
3afcc463 | 263 | } else { |
a0bb5535 | 264 | if (is_null_oid(&old_oid)) |
aebfc133 MH |
265 | die("delete %s: zero <oldvalue>", refname); |
266 | have_old = 1; | |
3afcc463 | 267 | } |
c750ba95 | 268 | |
e23d8435 | 269 | if (*next != line_termination) |
aebfc133 MH |
270 | die("delete %s: extra input: %s", refname, next); |
271 | ||
fb5a6bb6 | 272 | if (ref_transaction_delete(transaction, refname, |
89f3bbdd | 273 | have_old ? &old_oid : NULL, |
fb5a6bb6 | 274 | update_flags, msg, &err)) |
8c8bdc0d | 275 | die("%s", err.buf); |
aebfc133 | 276 | |
d345e9fb | 277 | update_flags = default_flags; |
aebfc133 | 278 | free(refname); |
ab5ac957 | 279 | strbuf_release(&err); |
c750ba95 BK |
280 | } |
281 | ||
94fd491a PS |
282 | static void parse_cmd_verify(struct ref_transaction *transaction, |
283 | const char *next, const char *end) | |
c750ba95 | 284 | { |
ab5ac957 | 285 | struct strbuf err = STRBUF_INIT; |
aebfc133 | 286 | char *refname; |
a0bb5535 | 287 | struct object_id old_oid; |
c750ba95 | 288 | |
5ae6c5a7 | 289 | refname = parse_refname(&next); |
aebfc133 | 290 | if (!refname) |
f11b09fb | 291 | die("verify: missing <ref>"); |
c750ba95 | 292 | |
804dba54 | 293 | if (parse_next_oid(&next, end, &old_oid, "verify", refname, |
a0bb5535 | 294 | PARSE_SHA1_OLD)) |
295 | oidclr(&old_oid); | |
0e729c7e | 296 | |
e23d8435 | 297 | if (*next != line_termination) |
aebfc133 MH |
298 | die("verify %s: extra input: %s", refname, next); |
299 | ||
89f3bbdd | 300 | if (ref_transaction_verify(transaction, refname, &old_oid, |
16180334 | 301 | update_flags, &err)) |
8e34800e | 302 | die("%s", err.buf); |
aebfc133 | 303 | |
d345e9fb | 304 | update_flags = default_flags; |
aebfc133 | 305 | free(refname); |
ab5ac957 | 306 | strbuf_release(&err); |
c750ba95 BK |
307 | } |
308 | ||
efa3d64c PS |
309 | static void report_ok(const char *command) |
310 | { | |
311 | fprintf(stdout, "%s: ok\n", command); | |
312 | fflush(stdout); | |
313 | } | |
314 | ||
94fd491a PS |
315 | static void parse_cmd_option(struct ref_transaction *transaction, |
316 | const char *next, const char *end) | |
c750ba95 | 317 | { |
aee9be2e SG |
318 | const char *rest; |
319 | if (skip_prefix(next, "no-deref", &rest) && *rest == line_termination) | |
91774afc | 320 | update_flags |= REF_NO_DEREF; |
c750ba95 BK |
321 | else |
322 | die("option unknown: %s", next); | |
323 | } | |
324 | ||
e48cf33b PS |
325 | static void parse_cmd_start(struct ref_transaction *transaction, |
326 | const char *next, const char *end) | |
327 | { | |
328 | if (*next != line_termination) | |
329 | die("start: extra input: %s", next); | |
efa3d64c | 330 | report_ok("start"); |
e48cf33b PS |
331 | } |
332 | ||
333 | static void parse_cmd_prepare(struct ref_transaction *transaction, | |
334 | const char *next, const char *end) | |
335 | { | |
336 | struct strbuf error = STRBUF_INIT; | |
337 | if (*next != line_termination) | |
338 | die("prepare: extra input: %s", next); | |
339 | if (ref_transaction_prepare(transaction, &error)) | |
340 | die("prepare: %s", error.buf); | |
efa3d64c | 341 | report_ok("prepare"); |
e48cf33b PS |
342 | } |
343 | ||
344 | static void parse_cmd_abort(struct ref_transaction *transaction, | |
345 | const char *next, const char *end) | |
346 | { | |
347 | struct strbuf error = STRBUF_INIT; | |
348 | if (*next != line_termination) | |
349 | die("abort: extra input: %s", next); | |
350 | if (ref_transaction_abort(transaction, &error)) | |
351 | die("abort: %s", error.buf); | |
efa3d64c | 352 | report_ok("abort"); |
e48cf33b PS |
353 | } |
354 | ||
355 | static void parse_cmd_commit(struct ref_transaction *transaction, | |
356 | const char *next, const char *end) | |
357 | { | |
358 | struct strbuf error = STRBUF_INIT; | |
359 | if (*next != line_termination) | |
360 | die("commit: extra input: %s", next); | |
361 | if (ref_transaction_commit(transaction, &error)) | |
362 | die("commit: %s", error.buf); | |
efa3d64c | 363 | report_ok("commit"); |
e48cf33b PS |
364 | ref_transaction_free(transaction); |
365 | } | |
366 | ||
367 | enum update_refs_state { | |
368 | /* Non-transactional state open for updates. */ | |
369 | UPDATE_REFS_OPEN, | |
370 | /* A transaction has been started. */ | |
371 | UPDATE_REFS_STARTED, | |
372 | /* References are locked and ready for commit */ | |
373 | UPDATE_REFS_PREPARED, | |
374 | /* Transaction has been committed or closed. */ | |
375 | UPDATE_REFS_CLOSED, | |
376 | }; | |
377 | ||
a65b8ac2 PS |
378 | static const struct parse_cmd { |
379 | const char *prefix; | |
94fd491a PS |
380 | void (*fn)(struct ref_transaction *, const char *, const char *); |
381 | unsigned args; | |
e48cf33b | 382 | enum update_refs_state state; |
a65b8ac2 | 383 | } command[] = { |
e48cf33b PS |
384 | { "update", parse_cmd_update, 3, UPDATE_REFS_OPEN }, |
385 | { "create", parse_cmd_create, 2, UPDATE_REFS_OPEN }, | |
386 | { "delete", parse_cmd_delete, 2, UPDATE_REFS_OPEN }, | |
387 | { "verify", parse_cmd_verify, 2, UPDATE_REFS_OPEN }, | |
388 | { "option", parse_cmd_option, 1, UPDATE_REFS_OPEN }, | |
389 | { "start", parse_cmd_start, 0, UPDATE_REFS_STARTED }, | |
390 | { "prepare", parse_cmd_prepare, 0, UPDATE_REFS_PREPARED }, | |
391 | { "abort", parse_cmd_abort, 0, UPDATE_REFS_CLOSED }, | |
392 | { "commit", parse_cmd_commit, 0, UPDATE_REFS_CLOSED }, | |
a65b8ac2 PS |
393 | }; |
394 | ||
de0e0d65 | 395 | static void update_refs_stdin(void) |
c750ba95 | 396 | { |
de0e0d65 | 397 | struct strbuf input = STRBUF_INIT, err = STRBUF_INIT; |
e48cf33b | 398 | enum update_refs_state state = UPDATE_REFS_OPEN; |
de0e0d65 | 399 | struct ref_transaction *transaction; |
94fd491a | 400 | int i, j; |
de0e0d65 PS |
401 | |
402 | transaction = ref_transaction_begin(&err); | |
403 | if (!transaction) | |
404 | die("%s", err.buf); | |
405 | ||
c750ba95 | 406 | /* Read each line dispatch its command */ |
94fd491a | 407 | while (!strbuf_getwholeline(&input, stdin, line_termination)) { |
a65b8ac2 PS |
408 | const struct parse_cmd *cmd = NULL; |
409 | ||
94fd491a | 410 | if (*input.buf == line_termination) |
c750ba95 | 411 | die("empty command in input"); |
94fd491a PS |
412 | else if (isspace(*input.buf)) |
413 | die("whitespace before command: %s", input.buf); | |
a65b8ac2 PS |
414 | |
415 | for (i = 0; i < ARRAY_SIZE(command); i++) { | |
416 | const char *prefix = command[i].prefix; | |
94fd491a | 417 | char c; |
a65b8ac2 | 418 | |
94fd491a PS |
419 | if (!starts_with(input.buf, prefix)) |
420 | continue; | |
421 | ||
422 | /* | |
423 | * If the command has arguments, verify that it's | |
424 | * followed by a space. Otherwise, it shall be followed | |
425 | * by a line terminator. | |
426 | */ | |
427 | c = command[i].args ? ' ' : line_termination; | |
428 | if (input.buf[strlen(prefix)] != c) | |
a65b8ac2 PS |
429 | continue; |
430 | ||
431 | cmd = &command[i]; | |
432 | break; | |
433 | } | |
434 | if (!cmd) | |
94fd491a PS |
435 | die("unknown command: %s", input.buf); |
436 | ||
437 | /* | |
438 | * Read additional arguments if NUL-terminated. Do not raise an | |
439 | * error in case there is an early EOF to let the command | |
440 | * handle missing arguments with a proper error message. | |
441 | */ | |
442 | for (j = 1; line_termination == '\0' && j < cmd->args; j++) | |
443 | if (strbuf_appendwholeline(&input, stdin, line_termination)) | |
444 | break; | |
445 | ||
e48cf33b PS |
446 | switch (state) { |
447 | case UPDATE_REFS_OPEN: | |
448 | case UPDATE_REFS_STARTED: | |
8c4417f1 PS |
449 | if (state == UPDATE_REFS_STARTED && cmd->state == UPDATE_REFS_STARTED) |
450 | die("cannot restart ongoing transaction"); | |
e48cf33b PS |
451 | /* Do not downgrade a transaction to a non-transaction. */ |
452 | if (cmd->state >= state) | |
453 | state = cmd->state; | |
454 | break; | |
455 | case UPDATE_REFS_PREPARED: | |
456 | if (cmd->state != UPDATE_REFS_CLOSED) | |
457 | die("prepared transactions can only be closed"); | |
458 | state = cmd->state; | |
459 | break; | |
460 | case UPDATE_REFS_CLOSED: | |
262a4d28 PS |
461 | if (cmd->state != UPDATE_REFS_STARTED) |
462 | die("transaction is closed"); | |
463 | ||
464 | /* | |
465 | * Open a new transaction if we're currently closed and | |
466 | * get a "start". | |
467 | */ | |
468 | state = cmd->state; | |
469 | transaction = ref_transaction_begin(&err); | |
470 | if (!transaction) | |
471 | die("%s", err.buf); | |
472 | ||
e48cf33b PS |
473 | break; |
474 | } | |
475 | ||
94fd491a PS |
476 | cmd->fn(transaction, input.buf + strlen(cmd->prefix) + !!cmd->args, |
477 | input.buf + input.len); | |
e23d8435 | 478 | } |
c750ba95 | 479 | |
e48cf33b PS |
480 | switch (state) { |
481 | case UPDATE_REFS_OPEN: | |
482 | /* Commit by default if no transaction was requested. */ | |
483 | if (ref_transaction_commit(transaction, &err)) | |
484 | die("%s", err.buf); | |
485 | ref_transaction_free(transaction); | |
486 | break; | |
487 | case UPDATE_REFS_STARTED: | |
488 | case UPDATE_REFS_PREPARED: | |
489 | /* If using a transaction, we want to abort it. */ | |
490 | if (ref_transaction_abort(transaction, &err)) | |
491 | die("%s", err.buf); | |
492 | break; | |
493 | case UPDATE_REFS_CLOSED: | |
494 | /* Otherwise no need to do anything, the transaction was closed already. */ | |
495 | break; | |
496 | } | |
de0e0d65 | 497 | |
de0e0d65 | 498 | strbuf_release(&err); |
e23d8435 | 499 | strbuf_release(&input); |
c750ba95 BK |
500 | } |
501 | ||
a633fca0 | 502 | int cmd_update_ref(int argc, const char **argv, const char *prefix) |
66bf85a4 | 503 | { |
db7516ab | 504 | const char *refname, *oldval; |
a0bb5535 | 505 | struct object_id oid, oldoid; |
fec14ec3 | 506 | int delete = 0, no_deref = 0, read_stdin = 0, end_null = 0; |
144c76fa | 507 | int create_reflog = 0; |
89942be6 | 508 | struct option options[] = { |
82269505 | 509 | OPT_STRING( 'm', NULL, &msg, N_("reason"), N_("reason of the update")), |
d5d09d47 SB |
510 | OPT_BOOL('d', NULL, &delete, N_("delete the reference")), |
511 | OPT_BOOL( 0 , "no-deref", &no_deref, | |
82269505 | 512 | N_("update <refname> not the one it points to")), |
9a86b899 JH |
513 | OPT_BOOL('z', NULL, &end_null, N_("stdin has NUL-terminated arguments")), |
514 | OPT_BOOL( 0 , "stdin", &read_stdin, N_("read updates from stdin")), | |
98c32bd8 | 515 | OPT_BOOL( 0 , "create-reflog", &create_reflog, N_("create a reflog")), |
89942be6 PH |
516 | OPT_END(), |
517 | }; | |
66bf85a4 | 518 | |
ef90d6d4 | 519 | git_config(git_default_config, NULL); |
37782920 SB |
520 | argc = parse_options(argc, argv, prefix, options, git_update_ref_usage, |
521 | 0); | |
89942be6 PH |
522 | if (msg && !*msg) |
523 | die("Refusing to perform update with empty message."); | |
5b16b090 | 524 | |
144c76fa DT |
525 | create_reflog_flag = create_reflog ? REF_FORCE_CREATE_REFLOG : 0; |
526 | ||
d345e9fb EN |
527 | if (no_deref) { |
528 | default_flags = REF_NO_DEREF; | |
529 | update_flags = default_flags; | |
530 | } | |
531 | ||
c750ba95 | 532 | if (read_stdin) { |
d345e9fb | 533 | if (delete || argc > 0) |
c750ba95 BK |
534 | usage_with_options(git_update_ref_usage, options); |
535 | if (end_null) | |
536 | line_termination = '\0'; | |
de0e0d65 | 537 | update_refs_stdin(); |
8bcd3748 | 538 | return 0; |
c750ba95 BK |
539 | } |
540 | ||
541 | if (end_null) | |
542 | usage_with_options(git_update_ref_usage, options); | |
543 | ||
ac5409e4 | 544 | if (delete) { |
3fe8dce6 | 545 | if (argc < 1 || argc > 2) |
973a70ea KW |
546 | usage_with_options(git_update_ref_usage, options); |
547 | refname = argv[0]; | |
548 | oldval = argv[1]; | |
549 | } else { | |
550 | const char *value; | |
551 | if (argc < 2 || argc > 3) | |
89942be6 | 552 | usage_with_options(git_update_ref_usage, options); |
973a70ea KW |
553 | refname = argv[0]; |
554 | value = argv[1]; | |
555 | oldval = argv[2]; | |
d850b7a5 | 556 | if (repo_get_oid(the_repository, value, &oid)) |
973a70ea | 557 | die("%s: not a valid SHA1", value); |
ac5409e4 JH |
558 | } |
559 | ||
e2991c80 MH |
560 | if (oldval) { |
561 | if (!*oldval) | |
562 | /* | |
563 | * The empty string implies that the reference | |
564 | * must not already exist: | |
565 | */ | |
a0bb5535 | 566 | oidclr(&oldoid); |
d850b7a5 | 567 | else if (repo_get_oid(the_repository, oldval, &oldoid)) |
e2991c80 MH |
568 | die("%s: not a valid old SHA1", oldval); |
569 | } | |
66bf85a4 | 570 | |
973a70ea | 571 | if (delete) |
1c03c4d3 MH |
572 | /* |
573 | * For purposes of backwards compatibility, we treat | |
574 | * NULL_SHA1 as "don't care" here: | |
575 | */ | |
de922669 | 576 | return delete_ref(msg, refname, |
2616a5e5 | 577 | (oldval && !is_null_oid(&oldoid)) ? &oldoid : NULL, |
d345e9fb | 578 | default_flags); |
973a70ea | 579 | else |
ae077771 | 580 | return update_ref(msg, refname, &oid, oldval ? &oldoid : NULL, |
d345e9fb | 581 | default_flags | create_reflog_flag, |
144c76fa | 582 | UPDATE_REFS_DIE_ON_ERR); |
66bf85a4 | 583 | } |