replace-object: allow lookup_replace_object to handle arbitrary repositories
[git/git.git] / builtin / cat-file.c
CommitLineData
8bc9a0c7
LT
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
e83c5163 6#include "cache.h"
b2141fc1 7#include "config.h"
f81daefe 8#include "builtin.h"
3a35cb2e 9#include "diff.h"
15d8e565 10#include "parse-options.h"
e5fba602 11#include "userdiff.h"
00c8fd49 12#include "streaming.h"
122d5346 13#include "tree-walk.h"
3115ee45 14#include "sha1-array.h"
7709f468 15#include "packfile.h"
15d8e565 16
bfd15594
JK
17struct batch_options {
18 int enabled;
19 int follow_symlinks;
20 int print_contents;
fc4937c3 21 int buffer_output;
6a951937 22 int all_objects;
32145943 23 int cmdmode; /* may be 'w' or 'c' for --filters or --textconv */
bfd15594
JK
24 const char *format;
25};
26
7bcf3414
JS
27static const char *force_path;
28
b9e62f60 29static int filter_object(const char *path, unsigned mode,
7889ed25 30 const struct object_id *oid,
b9e62f60
JS
31 char **buf, unsigned long *size)
32{
33 enum object_type type;
34
b4f5aca4 35 *buf = read_object_file(oid, &type, size);
b9e62f60
JS
36 if (!*buf)
37 return error(_("cannot read object %s '%s'"),
7889ed25 38 oid_to_hex(oid), path);
b9e62f60
JS
39 if ((type == OBJ_BLOB) && S_ISREG(mode)) {
40 struct strbuf strbuf = STRBUF_INIT;
41 if (convert_to_working_tree(path, *buf, *size, &strbuf)) {
42 free(*buf);
43 *size = strbuf.len;
44 *buf = strbuf_detach(&strbuf, NULL);
45 }
46 }
47
48 return 0;
49}
50
39e4ae38
KN
51static int cat_one_file(int opt, const char *exp_type, const char *obj_name,
52 int unknown_type)
e83c5163 53{
63ecb99e 54 struct object_id oid;
21666f1a 55 enum object_type type;
e5fba602 56 char *buf;
e83c5163 57 unsigned long size;
e5fba602 58 struct object_context obj_context;
27b5c1a0 59 struct object_info oi = OBJECT_INFO_INIT;
39e4ae38 60 struct strbuf sb = STRBUF_INIT;
1f0c0d36 61 unsigned flags = OBJECT_INFO_LOOKUP_REPLACE;
7bcf3414 62 const char *path = force_path;
39e4ae38
KN
63
64 if (unknown_type)
19fc5e84 65 flags |= OBJECT_INFO_ALLOW_UNKNOWN_TYPE;
2b6854c8 66
321c89bf 67 if (get_oid_with_context(obj_name, GET_OID_RECORD_PATH,
e82caf38 68 &oid, &obj_context))
2b6854c8 69 die("Not a valid object name %s", obj_name);
7950571a 70
7bcf3414
JS
71 if (!path)
72 path = obj_context.path;
73 if (obj_context.mode == S_IFINVALID)
74 obj_context.mode = 0100644;
75
7950571a
PA
76 buf = NULL;
77 switch (opt) {
78 case 't':
6ca32f47 79 oi.type_name = &sb;
abef9020 80 if (oid_object_info_extended(&oid, &oi, flags) < 0)
39e4ae38
KN
81 die("git cat-file: could not get object info");
82 if (sb.len) {
83 printf("%s\n", sb.buf);
84 strbuf_release(&sb);
f2a06330 85 return 0;
11e7d5c5 86 }
7950571a
PA
87 break;
88
89 case 's':
39e4ae38 90 oi.sizep = &size;
abef9020 91 if (oid_object_info_extended(&oid, &oi, flags) < 0)
39e4ae38
KN
92 die("git cat-file: could not get object info");
93 printf("%lu\n", size);
94 return 0;
7950571a
PA
95
96 case 'e':
63ecb99e 97 return !has_object_file(&oid);
7950571a 98
b9e62f60 99 case 'w':
cc0ea7c9 100 if (!path)
b9e62f60
JS
101 die("git cat-file --filters %s: <object> must be "
102 "<sha1:path>", obj_name);
103
7bcf3414 104 if (filter_object(path, obj_context.mode,
7889ed25 105 &oid, &buf, &size))
b9e62f60
JS
106 return -1;
107 break;
108
3ac21617 109 case 'c':
cc0ea7c9 110 if (!path)
3ac21617
MG
111 die("git cat-file --textconv %s: <object> must be <sha1:path>",
112 obj_name);
113
7889ed25 114 if (textconv_object(path, obj_context.mode, &oid, 1, &buf, &size))
3ac21617 115 break;
1cf01a34 116 /* else fallthrough */
3ac21617 117
a0f15fa5 118 case 'p':
abef9020 119 type = oid_object_info(&oid, NULL);
21666f1a 120 if (type < 0)
2b6854c8 121 die("Not a valid object name %s", obj_name);
a0f15fa5
JH
122
123 /* custom pretty-print here */
2b6854c8 124 if (type == OBJ_TREE) {
66dbfd55
GV
125 const char *ls_args[3] = { NULL };
126 ls_args[0] = "ls-tree";
127 ls_args[1] = obj_name;
2b6854c8
SP
128 return cmd_ls_tree(2, ls_args, NULL);
129 }
a0f15fa5 130
00c8fd49 131 if (type == OBJ_BLOB)
7eda0e4f 132 return stream_blob_to_fd(1, &oid, NULL, 0);
b4f5aca4 133 buf = read_object_file(&oid, &type, &size);
a0f15fa5 134 if (!buf)
2b6854c8 135 die("Cannot read object %s", obj_name);
a0f15fa5
JH
136
137 /* otherwise just spit out the data */
138 break;
e5fba602 139
7950571a 140 case 0:
00c8fd49 141 if (type_from_string(exp_type) == OBJ_BLOB) {
63ecb99e 142 struct object_id blob_oid;
abef9020 143 if (oid_object_info(&oid, NULL) == OBJ_TAG) {
b4f5aca4 144 char *buffer = read_object_file(&oid, &type,
145 &size);
e3f1da98
RS
146 const char *target;
147 if (!skip_prefix(buffer, "object ", &target) ||
63ecb99e 148 get_oid_hex(target, &blob_oid))
149 die("%s not a valid tag", oid_to_hex(&oid));
00c8fd49
NTND
150 free(buffer);
151 } else
63ecb99e 152 oidcpy(&blob_oid, &oid);
00c8fd49 153
abef9020 154 if (oid_object_info(&blob_oid, NULL) == OBJ_BLOB)
7eda0e4f 155 return stream_blob_to_fd(1, &blob_oid, NULL, 0);
00c8fd49
NTND
156 /*
157 * we attempted to dereference a tag to a blob
158 * and failed; there may be new dereference
159 * mechanisms this code is not aware of.
160 * fall-back to the usual case.
161 */
162 }
02f0547e 163 buf = read_object_with_reference(&oid, exp_type, &size, NULL);
7950571a
PA
164 break;
165
166 default:
d7530708 167 die("git cat-file: unknown option: %s", exp_type);
bf0c6e83
LT
168 }
169
11e7d5c5 170 if (!buf)
34baebce 171 die("git cat-file %s: bad file", obj_name);
11e7d5c5 172
7230e6d0 173 write_or_die(1, buf, size);
05c2b7ba 174 free(buf);
dc944b65 175 free(obj_context.path);
bf0c6e83 176 return 0;
e83c5163 177}
9cf71b17 178
93d2a607 179struct expand_data {
cd4f77be 180 struct object_id oid;
93d2a607
JK
181 enum object_type type;
182 unsigned long size;
166df26f 183 off_t disk_size;
97be0407 184 const char *rest;
cd4f77be 185 struct object_id delta_base_oid;
93d2a607
JK
186
187 /*
188 * If mark_query is true, we do not expand anything, but rather
189 * just mark the object_info with items we wish to query.
190 */
191 int mark_query;
192
97be0407
JK
193 /*
194 * Whether to split the input on whitespace before feeding it to
195 * get_sha1; this is decided during the mark_query phase based on
196 * whether we have a %(rest) token in our format.
197 */
198 int split_on_whitespace;
199
93d2a607
JK
200 /*
201 * After a mark_query run, this object_info is set up to be
202 * passed to sha1_object_info_extended. It will point to the data
203 * elements above, so you can retrieve the response from there.
204 */
205 struct object_info info;
845de33a
JK
206
207 /*
208 * This flag will be true if the requested batch format and options
209 * don't require us to call sha1_object_info, which can then be
210 * optimized out.
211 */
212 unsigned skip_object_info : 1;
93d2a607
JK
213};
214
215static int is_atom(const char *atom, const char *s, int slen)
216{
217 int alen = strlen(atom);
218 return alen == slen && !memcmp(atom, s, alen);
219}
220
221static void expand_atom(struct strbuf *sb, const char *atom, int len,
222 void *vdata)
223{
224 struct expand_data *data = vdata;
225
226 if (is_atom("objectname", atom, len)) {
227 if (!data->mark_query)
cd4f77be 228 strbuf_addstr(sb, oid_to_hex(&data->oid));
93d2a607 229 } else if (is_atom("objecttype", atom, len)) {
5b086407
JK
230 if (data->mark_query)
231 data->info.typep = &data->type;
232 else
debca9d2 233 strbuf_addstr(sb, type_name(data->type));
93d2a607
JK
234 } else if (is_atom("objectsize", atom, len)) {
235 if (data->mark_query)
236 data->info.sizep = &data->size;
237 else
238 strbuf_addf(sb, "%lu", data->size);
a4ac1061
JK
239 } else if (is_atom("objectsize:disk", atom, len)) {
240 if (data->mark_query)
241 data->info.disk_sizep = &data->disk_size;
242 else
166df26f 243 strbuf_addf(sb, "%"PRIuMAX, (uintmax_t)data->disk_size);
97be0407
JK
244 } else if (is_atom("rest", atom, len)) {
245 if (data->mark_query)
246 data->split_on_whitespace = 1;
247 else if (data->rest)
248 strbuf_addstr(sb, data->rest);
65ea9c3c
JK
249 } else if (is_atom("deltabase", atom, len)) {
250 if (data->mark_query)
cd4f77be 251 data->info.delta_base_sha1 = data->delta_base_oid.hash;
65ea9c3c 252 else
cd4f77be 253 strbuf_addstr(sb,
254 oid_to_hex(&data->delta_base_oid));
93d2a607
JK
255 } else
256 die("unknown format element: %.*s", len, atom);
257}
258
259static size_t expand_format(struct strbuf *sb, const char *start, void *data)
260{
261 const char *end;
262
263 if (*start != '(')
264 return 0;
265 end = strchr(start + 1, ')');
266 if (!end)
267 die("format element '%s' does not end in ')'", start);
268
269 expand_atom(sb, start + 1, end - start - 1, data);
270
271 return end - start + 1;
272}
273
fc4937c3
JK
274static void batch_write(struct batch_options *opt, const void *data, int len)
275{
276 if (opt->buffer_output) {
277 if (fwrite(data, 1, len, stdout) != len)
278 die_errno("unable to write to stdout");
279 } else
280 write_or_die(1, data, len);
281}
282
283static void print_object_or_die(struct batch_options *opt, struct expand_data *data)
98e2092b 284{
63ecb99e 285 const struct object_id *oid = &data->oid;
370c9268 286
6554dfa9
JK
287 assert(data->info.typep);
288
370c9268 289 if (data->type == OBJ_BLOB) {
fc4937c3
JK
290 if (opt->buffer_output)
291 fflush(stdout);
32145943
JS
292 if (opt->cmdmode) {
293 char *contents;
294 unsigned long size;
295
296 if (!data->rest)
7889ed25 297 die("missing path for '%s'", oid_to_hex(oid));
32145943
JS
298
299 if (opt->cmdmode == 'w') {
7889ed25 300 if (filter_object(data->rest, 0100644, oid,
32145943
JS
301 &contents, &size))
302 die("could not convert '%s' %s",
7889ed25 303 oid_to_hex(oid), data->rest);
32145943
JS
304 } else if (opt->cmdmode == 'c') {
305 enum object_type type;
7889ed25 306 if (!textconv_object(data->rest, 0100644, oid,
32145943 307 1, &contents, &size))
b4f5aca4 308 contents = read_object_file(oid,
309 &type,
310 &size);
32145943
JS
311 if (!contents)
312 die("could not convert '%s' %s",
7889ed25 313 oid_to_hex(oid), data->rest);
32145943
JS
314 } else
315 die("BUG: invalid cmdmode: %c", opt->cmdmode);
316 batch_write(opt, contents, size);
317 free(contents);
7889ed25 318 } else if (stream_blob_to_fd(1, oid, NULL, 0) < 0)
63ecb99e 319 die("unable to stream %s to stdout", oid_to_hex(oid));
98e2092b
JK
320 }
321 else {
370c9268
JK
322 enum object_type type;
323 unsigned long size;
98e2092b
JK
324 void *contents;
325
b4f5aca4 326 contents = read_object_file(oid, &type, &size);
98e2092b 327 if (!contents)
63ecb99e 328 die("object %s disappeared", oid_to_hex(oid));
370c9268 329 if (type != data->type)
63ecb99e 330 die("object %s changed type!?", oid_to_hex(oid));
6554dfa9 331 if (data->info.sizep && size != data->size)
63ecb99e 332 die("object %s changed size!?", oid_to_hex(oid));
98e2092b 333
fc4937c3 334 batch_write(opt, contents, size);
98e2092b
JK
335 free(contents);
336 }
337}
338
44b877e9
JK
339static void batch_object_write(const char *obj_name, struct batch_options *opt,
340 struct expand_data *data)
341{
342 struct strbuf buf = STRBUF_INIT;
343
845de33a 344 if (!data->skip_object_info &&
abef9020 345 oid_object_info_extended(&data->oid, &data->info,
346 OBJECT_INFO_LOOKUP_REPLACE) < 0) {
cd4f77be 347 printf("%s missing\n",
348 obj_name ? obj_name : oid_to_hex(&data->oid));
44b877e9
JK
349 fflush(stdout);
350 return;
351 }
352
353 strbuf_expand(&buf, opt->format, expand_format, data);
354 strbuf_addch(&buf, '\n');
355 batch_write(opt, buf.buf, buf.len);
356 strbuf_release(&buf);
357
358 if (opt->print_contents) {
359 print_object_or_die(opt, data);
360 batch_write(opt, "\n", 1);
361 }
362}
363
82330950
JK
364static void batch_one_object(const char *obj_name, struct batch_options *opt,
365 struct expand_data *data)
05d5667f 366{
122d5346 367 struct object_context ctx;
321c89bf 368 int flags = opt->follow_symlinks ? GET_OID_FOLLOW_SYMLINKS : 0;
122d5346 369 enum follow_symlinks_result result;
05d5667f 370
e82caf38 371 result = get_oid_with_context(obj_name, flags, &data->oid, &ctx);
122d5346
DT
372 if (result != FOUND) {
373 switch (result) {
374 case MISSING_OBJECT:
375 printf("%s missing\n", obj_name);
376 break;
377 case DANGLING_SYMLINK:
378 printf("dangling %"PRIuMAX"\n%s\n",
379 (uintmax_t)strlen(obj_name), obj_name);
380 break;
381 case SYMLINK_LOOP:
382 printf("loop %"PRIuMAX"\n%s\n",
383 (uintmax_t)strlen(obj_name), obj_name);
384 break;
385 case NOT_DIR:
386 printf("notdir %"PRIuMAX"\n%s\n",
387 (uintmax_t)strlen(obj_name), obj_name);
388 break;
389 default:
390 die("BUG: unknown get_sha1_with_context result %d\n",
391 result);
392 break;
393 }
394 fflush(stdout);
82330950 395 return;
122d5346
DT
396 }
397
398 if (ctx.mode == 0) {
399 printf("symlink %"PRIuMAX"\n%s\n",
400 (uintmax_t)ctx.symlink_path.len,
401 ctx.symlink_path.buf);
422b2063 402 fflush(stdout);
82330950 403 return;
05d5667f
AR
404 }
405
44b877e9 406 batch_object_write(obj_name, opt, data);
05d5667f
AR
407}
408
6a951937
JK
409struct object_cb_data {
410 struct batch_options *opt;
411 struct expand_data *expand;
412};
413
1b7ba794 414static int batch_object_cb(const struct object_id *oid, void *vdata)
6a951937 415{
3115ee45 416 struct object_cb_data *data = vdata;
1b7ba794 417 oidcpy(&data->expand->oid, oid);
6a951937 418 batch_object_write(NULL, data->opt, data->expand);
16ddcd40 419 return 0;
6a951937
JK
420}
421
76c1d9a0 422static int batch_loose_object(const struct object_id *oid,
6a951937
JK
423 const char *path,
424 void *data)
425{
910650d2 426 oid_array_append(data, oid);
3115ee45 427 return 0;
6a951937
JK
428}
429
76c1d9a0 430static int batch_packed_object(const struct object_id *oid,
6a951937
JK
431 struct packed_git *pack,
432 uint32_t pos,
433 void *data)
434{
910650d2 435 oid_array_append(data, oid);
3115ee45 436 return 0;
6a951937
JK
437}
438
b71bd480 439static int batch_objects(struct batch_options *opt)
05d5667f 440{
f285a2d7 441 struct strbuf buf = STRBUF_INIT;
93d2a607 442 struct expand_data data;
a42fcd15 443 int save_warning;
07e23839 444 int retval = 0;
93d2a607
JK
445
446 if (!opt->format)
447 opt->format = "%(objectname) %(objecttype) %(objectsize)";
448
449 /*
450 * Expand once with our special mark_query flag, which will prime the
451 * object_info to be handed to sha1_object_info_extended for each
452 * object.
453 */
454 memset(&data, 0, sizeof(data));
455 data.mark_query = 1;
456 strbuf_expand(&buf, opt->format, expand_format, &data);
457 data.mark_query = 0;
32145943
JS
458 if (opt->cmdmode)
459 data.split_on_whitespace = 1;
05d5667f 460
845de33a 461 if (opt->all_objects) {
27b5c1a0 462 struct object_info empty = OBJECT_INFO_INIT;
845de33a
JK
463 if (!memcmp(&data.info, &empty, sizeof(empty)))
464 data.skip_object_info = 1;
465 }
466
6554dfa9
JK
467 /*
468 * If we are printing out the object, then always fill in the type,
469 * since we will want to decide whether or not to stream.
470 */
471 if (opt->print_contents)
472 data.info.typep = &data.type;
473
6a951937 474 if (opt->all_objects) {
910650d2 475 struct oid_array sa = OID_ARRAY_INIT;
6a951937 476 struct object_cb_data cb;
3115ee45
JK
477
478 for_each_loose_object(batch_loose_object, &sa, 0);
479 for_each_packed_object(batch_packed_object, &sa, 0);
8b4c0103
JT
480 if (repository_format_partial_clone)
481 warning("This repository has extensions.partialClone set. Some objects may not be loaded.");
3115ee45 482
6a951937
JK
483 cb.opt = opt;
484 cb.expand = &data;
910650d2 485 oid_array_for_each_unique(&sa, batch_object_cb, &cb);
3115ee45 486
910650d2 487 oid_array_clear(&sa);
6a951937
JK
488 return 0;
489 }
490
25fba78d
JK
491 /*
492 * We are going to call get_sha1 on a potentially very large number of
493 * objects. In most large cases, these will be actual object sha1s. The
494 * cost to double-check that each one is not also a ref (just so we can
495 * warn) ends up dwarfing the actual cost of the object lookups
496 * themselves. We can work around it by just turning off the warning.
497 */
a42fcd15 498 save_warning = warn_on_object_refname_ambiguity;
25fba78d
JK
499 warn_on_object_refname_ambiguity = 0;
500
b42ca3dd 501 while (strbuf_getline(&buf, stdin) != EOF) {
97be0407
JK
502 if (data.split_on_whitespace) {
503 /*
504 * Split at first whitespace, tying off the beginning
505 * of the string and saving the remainder (or NULL) in
506 * data.rest.
507 */
508 char *p = strpbrk(buf.buf, " \t");
509 if (p) {
510 while (*p && strchr(" \t", *p))
511 *p++ = '\0';
512 }
513 data.rest = p;
514 }
515
82330950 516 batch_one_object(buf.buf, opt, &data);
05d5667f
AR
517 }
518
648027c4 519 strbuf_release(&buf);
a42fcd15 520 warn_on_object_refname_ambiguity = save_warning;
07e23839 521 return retval;
05d5667f
AR
522}
523
15d8e565 524static const char * const cat_file_usage[] = {
7889ed25
JH
525 N_("git cat-file (-t [--allow-unknown-type] | -s [--allow-unknown-type] | -e | -p | <type> | --textconv | --filters) [--path=<path>] <object>"),
526 N_("git cat-file (--batch | --batch-check) [--follow-symlinks] [--textconv | --filters]"),
15d8e565
MB
527 NULL
528};
4814dbe8 529
e5fba602
CP
530static int git_cat_file_config(const char *var, const char *value, void *cb)
531{
6680a087 532 if (userdiff_config(var, value) < 0)
e5fba602 533 return -1;
e5fba602
CP
534
535 return git_default_config(var, value, cb);
536}
537
b71bd480
JK
538static int batch_option_callback(const struct option *opt,
539 const char *arg,
540 int unset)
541{
542 struct batch_options *bo = opt->value;
543
122d5346
DT
544 if (bo->enabled) {
545 return 1;
b71bd480
JK
546 }
547
548 bo->enabled = 1;
549 bo->print_contents = !strcmp(opt->long_name, "batch");
93d2a607 550 bo->format = arg;
b71bd480
JK
551
552 return 0;
553}
554
9cf71b17
AR
555int cmd_cat_file(int argc, const char **argv, const char *prefix)
556{
b71bd480 557 int opt = 0;
4814dbe8 558 const char *exp_type = NULL, *obj_name = NULL;
b71bd480 559 struct batch_options batch = {0};
39e4ae38 560 int unknown_type = 0;
9cf71b17 561
15d8e565 562 const struct option options[] = {
d68faec7 563 OPT_GROUP(N_("<type> can be one of: blob, tree, commit, tag")),
b48158ac
KN
564 OPT_CMDMODE('t', NULL, &opt, N_("show object type"), 't'),
565 OPT_CMDMODE('s', NULL, &opt, N_("show object size"), 's'),
566 OPT_CMDMODE('e', NULL, &opt,
d68faec7 567 N_("exit with zero when there's no error"), 'e'),
b48158ac
KN
568 OPT_CMDMODE('p', NULL, &opt, N_("pretty-print object's content"), 'p'),
569 OPT_CMDMODE(0, "textconv", &opt,
d68faec7 570 N_("for blob objects, run textconv on object's content"), 'c'),
b9e62f60
JS
571 OPT_CMDMODE(0, "filters", &opt,
572 N_("for blob objects, run filters on object's content"), 'w'),
7bcf3414
JS
573 OPT_STRING(0, "path", &force_path, N_("blob"),
574 N_("use a specific path for --textconv/--filters")),
ad42f28d 575 OPT_BOOL(0, "allow-unknown-type", &unknown_type,
39e4ae38 576 N_("allow -s and -t to work with broken/corrupt objects")),
fc4937c3 577 OPT_BOOL(0, "buffer", &batch.buffer_output, N_("buffer --batch output")),
93d2a607 578 { OPTION_CALLBACK, 0, "batch", &batch, "format",
b71bd480 579 N_("show info and content of objects fed from the standard input"),
93d2a607
JK
580 PARSE_OPT_OPTARG, batch_option_callback },
581 { OPTION_CALLBACK, 0, "batch-check", &batch, "format",
b71bd480 582 N_("show info about objects fed from the standard input"),
93d2a607 583 PARSE_OPT_OPTARG, batch_option_callback },
122d5346
DT
584 OPT_BOOL(0, "follow-symlinks", &batch.follow_symlinks,
585 N_("follow in-tree symlinks (used with --batch or --batch-check)")),
6a951937
JK
586 OPT_BOOL(0, "batch-all-objects", &batch.all_objects,
587 N_("show all objects with --batch or --batch-check")),
15d8e565
MB
588 OPT_END()
589 };
a8128ed6 590
e5fba602 591 git_config(git_cat_file_config, NULL);
4814dbe8 592
6a36e1e7 593 batch.buffer_output = -1;
37782920 594 argc = parse_options(argc, argv, prefix, options, cat_file_usage, 0);
05d5667f 595
15d8e565 596 if (opt) {
32145943
JS
597 if (batch.enabled && (opt == 'c' || opt == 'w'))
598 batch.cmdmode = opt;
599 else if (argc == 1)
15d8e565
MB
600 obj_name = argv[0];
601 else
602 usage_with_options(cat_file_usage, options);
603 }
b71bd480 604 if (!opt && !batch.enabled) {
15d8e565
MB
605 if (argc == 2) {
606 exp_type = argv[0];
607 obj_name = argv[1];
608 } else
609 usage_with_options(cat_file_usage, options);
610 }
32145943
JS
611 if (batch.enabled) {
612 if (batch.cmdmode != opt || argc)
613 usage_with_options(cat_file_usage, options);
614 if (batch.cmdmode && batch.all_objects)
615 die("--batch-all-objects cannot be combined with "
616 "--textconv nor with --filters");
9cf71b17
AR
617 }
618
6a951937 619 if ((batch.follow_symlinks || batch.all_objects) && !batch.enabled) {
122d5346
DT
620 usage_with_options(cat_file_usage, options);
621 }
622
7bcf3414
JS
623 if (force_path && opt != 'c' && opt != 'w') {
624 error("--path=<path> needs --textconv or --filters");
625 usage_with_options(cat_file_usage, options);
626 }
627
32145943
JS
628 if (force_path && batch.enabled) {
629 error("--path=<path> incompatible with --batch");
630 usage_with_options(cat_file_usage, options);
631 }
632
6a36e1e7
JK
633 if (batch.buffer_output < 0)
634 batch.buffer_output = batch.all_objects;
635
b71bd480
JK
636 if (batch.enabled)
637 return batch_objects(&batch);
05d5667f 638
39e4ae38
KN
639 if (unknown_type && opt != 't' && opt != 's')
640 die("git cat-file --allow-unknown-type: use with -s or -t");
641 return cat_one_file(opt, exp_type, obj_name, unknown_type);
9cf71b17 642}