Convert remaining callers of sha1_object_info_extended to object_id
[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
7889ed25 35 *buf = read_sha1_file(oid->hash, &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;
63ecb99e 80 if (sha1_object_info_extended(oid.hash, &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;
63ecb99e 91 if (sha1_object_info_extended(oid.hash, &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':
63ecb99e 119 type = sha1_object_info(oid.hash, 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);
63ecb99e 133 buf = read_sha1_file(oid.hash, &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;
143 if (sha1_object_info(oid.hash, NULL) == OBJ_TAG) {
144 char *buffer = read_sha1_file(oid.hash, &type, &size);
e3f1da98
RS
145 const char *target;
146 if (!skip_prefix(buffer, "object ", &target) ||
63ecb99e 147 get_oid_hex(target, &blob_oid))
148 die("%s not a valid tag", oid_to_hex(&oid));
00c8fd49
NTND
149 free(buffer);
150 } else
63ecb99e 151 oidcpy(&blob_oid, &oid);
00c8fd49 152
63ecb99e 153 if (sha1_object_info(blob_oid.hash, NULL) == OBJ_BLOB)
7eda0e4f 154 return stream_blob_to_fd(1, &blob_oid, NULL, 0);
00c8fd49
NTND
155 /*
156 * we attempted to dereference a tag to a blob
157 * and failed; there may be new dereference
158 * mechanisms this code is not aware of.
159 * fall-back to the usual case.
160 */
161 }
63ecb99e 162 buf = read_object_with_reference(oid.hash, exp_type, &size, NULL);
7950571a
PA
163 break;
164
165 default:
d7530708 166 die("git cat-file: unknown option: %s", exp_type);
bf0c6e83
LT
167 }
168
11e7d5c5 169 if (!buf)
34baebce 170 die("git cat-file %s: bad file", obj_name);
11e7d5c5 171
7230e6d0 172 write_or_die(1, buf, size);
05c2b7ba 173 free(buf);
dc944b65 174 free(obj_context.path);
bf0c6e83 175 return 0;
e83c5163 176}
9cf71b17 177
93d2a607 178struct expand_data {
cd4f77be 179 struct object_id oid;
93d2a607
JK
180 enum object_type type;
181 unsigned long size;
166df26f 182 off_t disk_size;
97be0407 183 const char *rest;
cd4f77be 184 struct object_id delta_base_oid;
93d2a607
JK
185
186 /*
187 * If mark_query is true, we do not expand anything, but rather
188 * just mark the object_info with items we wish to query.
189 */
190 int mark_query;
191
97be0407
JK
192 /*
193 * Whether to split the input on whitespace before feeding it to
194 * get_sha1; this is decided during the mark_query phase based on
195 * whether we have a %(rest) token in our format.
196 */
197 int split_on_whitespace;
198
93d2a607
JK
199 /*
200 * After a mark_query run, this object_info is set up to be
201 * passed to sha1_object_info_extended. It will point to the data
202 * elements above, so you can retrieve the response from there.
203 */
204 struct object_info info;
845de33a
JK
205
206 /*
207 * This flag will be true if the requested batch format and options
208 * don't require us to call sha1_object_info, which can then be
209 * optimized out.
210 */
211 unsigned skip_object_info : 1;
93d2a607
JK
212};
213
214static int is_atom(const char *atom, const char *s, int slen)
215{
216 int alen = strlen(atom);
217 return alen == slen && !memcmp(atom, s, alen);
218}
219
220static void expand_atom(struct strbuf *sb, const char *atom, int len,
221 void *vdata)
222{
223 struct expand_data *data = vdata;
224
225 if (is_atom("objectname", atom, len)) {
226 if (!data->mark_query)
cd4f77be 227 strbuf_addstr(sb, oid_to_hex(&data->oid));
93d2a607 228 } else if (is_atom("objecttype", atom, len)) {
5b086407
JK
229 if (data->mark_query)
230 data->info.typep = &data->type;
231 else
debca9d2 232 strbuf_addstr(sb, type_name(data->type));
93d2a607
JK
233 } else if (is_atom("objectsize", atom, len)) {
234 if (data->mark_query)
235 data->info.sizep = &data->size;
236 else
237 strbuf_addf(sb, "%lu", data->size);
a4ac1061
JK
238 } else if (is_atom("objectsize:disk", atom, len)) {
239 if (data->mark_query)
240 data->info.disk_sizep = &data->disk_size;
241 else
166df26f 242 strbuf_addf(sb, "%"PRIuMAX, (uintmax_t)data->disk_size);
97be0407
JK
243 } else if (is_atom("rest", atom, len)) {
244 if (data->mark_query)
245 data->split_on_whitespace = 1;
246 else if (data->rest)
247 strbuf_addstr(sb, data->rest);
65ea9c3c
JK
248 } else if (is_atom("deltabase", atom, len)) {
249 if (data->mark_query)
cd4f77be 250 data->info.delta_base_sha1 = data->delta_base_oid.hash;
65ea9c3c 251 else
cd4f77be 252 strbuf_addstr(sb,
253 oid_to_hex(&data->delta_base_oid));
93d2a607
JK
254 } else
255 die("unknown format element: %.*s", len, atom);
256}
257
258static size_t expand_format(struct strbuf *sb, const char *start, void *data)
259{
260 const char *end;
261
262 if (*start != '(')
263 return 0;
264 end = strchr(start + 1, ')');
265 if (!end)
266 die("format element '%s' does not end in ')'", start);
267
268 expand_atom(sb, start + 1, end - start - 1, data);
269
270 return end - start + 1;
271}
272
fc4937c3
JK
273static void batch_write(struct batch_options *opt, const void *data, int len)
274{
275 if (opt->buffer_output) {
276 if (fwrite(data, 1, len, stdout) != len)
277 die_errno("unable to write to stdout");
278 } else
279 write_or_die(1, data, len);
280}
281
282static void print_object_or_die(struct batch_options *opt, struct expand_data *data)
98e2092b 283{
63ecb99e 284 const struct object_id *oid = &data->oid;
370c9268 285
6554dfa9
JK
286 assert(data->info.typep);
287
370c9268 288 if (data->type == OBJ_BLOB) {
fc4937c3
JK
289 if (opt->buffer_output)
290 fflush(stdout);
32145943
JS
291 if (opt->cmdmode) {
292 char *contents;
293 unsigned long size;
294
295 if (!data->rest)
7889ed25 296 die("missing path for '%s'", oid_to_hex(oid));
32145943
JS
297
298 if (opt->cmdmode == 'w') {
7889ed25 299 if (filter_object(data->rest, 0100644, oid,
32145943
JS
300 &contents, &size))
301 die("could not convert '%s' %s",
7889ed25 302 oid_to_hex(oid), data->rest);
32145943
JS
303 } else if (opt->cmdmode == 'c') {
304 enum object_type type;
7889ed25 305 if (!textconv_object(data->rest, 0100644, oid,
32145943 306 1, &contents, &size))
7889ed25 307 contents = read_sha1_file(oid->hash, &type,
32145943
JS
308 &size);
309 if (!contents)
310 die("could not convert '%s' %s",
7889ed25 311 oid_to_hex(oid), data->rest);
32145943
JS
312 } else
313 die("BUG: invalid cmdmode: %c", opt->cmdmode);
314 batch_write(opt, contents, size);
315 free(contents);
7889ed25 316 } else if (stream_blob_to_fd(1, oid, NULL, 0) < 0)
63ecb99e 317 die("unable to stream %s to stdout", oid_to_hex(oid));
98e2092b
JK
318 }
319 else {
370c9268
JK
320 enum object_type type;
321 unsigned long size;
98e2092b
JK
322 void *contents;
323
63ecb99e 324 contents = read_sha1_file(oid->hash, &type, &size);
98e2092b 325 if (!contents)
63ecb99e 326 die("object %s disappeared", oid_to_hex(oid));
370c9268 327 if (type != data->type)
63ecb99e 328 die("object %s changed type!?", oid_to_hex(oid));
6554dfa9 329 if (data->info.sizep && size != data->size)
63ecb99e 330 die("object %s changed size!?", oid_to_hex(oid));
98e2092b 331
fc4937c3 332 batch_write(opt, contents, size);
98e2092b
JK
333 free(contents);
334 }
335}
336
44b877e9
JK
337static void batch_object_write(const char *obj_name, struct batch_options *opt,
338 struct expand_data *data)
339{
340 struct strbuf buf = STRBUF_INIT;
341
845de33a 342 if (!data->skip_object_info &&
1f0c0d36
JT
343 sha1_object_info_extended(data->oid.hash, &data->info,
344 OBJECT_INFO_LOOKUP_REPLACE) < 0) {
cd4f77be 345 printf("%s missing\n",
346 obj_name ? obj_name : oid_to_hex(&data->oid));
44b877e9
JK
347 fflush(stdout);
348 return;
349 }
350
351 strbuf_expand(&buf, opt->format, expand_format, data);
352 strbuf_addch(&buf, '\n');
353 batch_write(opt, buf.buf, buf.len);
354 strbuf_release(&buf);
355
356 if (opt->print_contents) {
357 print_object_or_die(opt, data);
358 batch_write(opt, "\n", 1);
359 }
360}
361
82330950
JK
362static void batch_one_object(const char *obj_name, struct batch_options *opt,
363 struct expand_data *data)
05d5667f 364{
122d5346 365 struct object_context ctx;
321c89bf 366 int flags = opt->follow_symlinks ? GET_OID_FOLLOW_SYMLINKS : 0;
122d5346 367 enum follow_symlinks_result result;
05d5667f 368
e82caf38 369 result = get_oid_with_context(obj_name, flags, &data->oid, &ctx);
122d5346
DT
370 if (result != FOUND) {
371 switch (result) {
372 case MISSING_OBJECT:
373 printf("%s missing\n", obj_name);
374 break;
375 case DANGLING_SYMLINK:
376 printf("dangling %"PRIuMAX"\n%s\n",
377 (uintmax_t)strlen(obj_name), obj_name);
378 break;
379 case SYMLINK_LOOP:
380 printf("loop %"PRIuMAX"\n%s\n",
381 (uintmax_t)strlen(obj_name), obj_name);
382 break;
383 case NOT_DIR:
384 printf("notdir %"PRIuMAX"\n%s\n",
385 (uintmax_t)strlen(obj_name), obj_name);
386 break;
387 default:
388 die("BUG: unknown get_sha1_with_context result %d\n",
389 result);
390 break;
391 }
392 fflush(stdout);
82330950 393 return;
122d5346
DT
394 }
395
396 if (ctx.mode == 0) {
397 printf("symlink %"PRIuMAX"\n%s\n",
398 (uintmax_t)ctx.symlink_path.len,
399 ctx.symlink_path.buf);
422b2063 400 fflush(stdout);
82330950 401 return;
05d5667f
AR
402 }
403
44b877e9 404 batch_object_write(obj_name, opt, data);
05d5667f
AR
405}
406
6a951937
JK
407struct object_cb_data {
408 struct batch_options *opt;
409 struct expand_data *expand;
410};
411
1b7ba794 412static int batch_object_cb(const struct object_id *oid, void *vdata)
6a951937 413{
3115ee45 414 struct object_cb_data *data = vdata;
1b7ba794 415 oidcpy(&data->expand->oid, oid);
6a951937 416 batch_object_write(NULL, data->opt, data->expand);
16ddcd40 417 return 0;
6a951937
JK
418}
419
76c1d9a0 420static int batch_loose_object(const struct object_id *oid,
6a951937
JK
421 const char *path,
422 void *data)
423{
910650d2 424 oid_array_append(data, oid);
3115ee45 425 return 0;
6a951937
JK
426}
427
76c1d9a0 428static int batch_packed_object(const struct object_id *oid,
6a951937
JK
429 struct packed_git *pack,
430 uint32_t pos,
431 void *data)
432{
910650d2 433 oid_array_append(data, oid);
3115ee45 434 return 0;
6a951937
JK
435}
436
b71bd480 437static int batch_objects(struct batch_options *opt)
05d5667f 438{
f285a2d7 439 struct strbuf buf = STRBUF_INIT;
93d2a607 440 struct expand_data data;
a42fcd15 441 int save_warning;
07e23839 442 int retval = 0;
93d2a607
JK
443
444 if (!opt->format)
445 opt->format = "%(objectname) %(objecttype) %(objectsize)";
446
447 /*
448 * Expand once with our special mark_query flag, which will prime the
449 * object_info to be handed to sha1_object_info_extended for each
450 * object.
451 */
452 memset(&data, 0, sizeof(data));
453 data.mark_query = 1;
454 strbuf_expand(&buf, opt->format, expand_format, &data);
455 data.mark_query = 0;
32145943
JS
456 if (opt->cmdmode)
457 data.split_on_whitespace = 1;
05d5667f 458
845de33a 459 if (opt->all_objects) {
27b5c1a0 460 struct object_info empty = OBJECT_INFO_INIT;
845de33a
JK
461 if (!memcmp(&data.info, &empty, sizeof(empty)))
462 data.skip_object_info = 1;
463 }
464
6554dfa9
JK
465 /*
466 * If we are printing out the object, then always fill in the type,
467 * since we will want to decide whether or not to stream.
468 */
469 if (opt->print_contents)
470 data.info.typep = &data.type;
471
6a951937 472 if (opt->all_objects) {
910650d2 473 struct oid_array sa = OID_ARRAY_INIT;
6a951937 474 struct object_cb_data cb;
3115ee45
JK
475
476 for_each_loose_object(batch_loose_object, &sa, 0);
477 for_each_packed_object(batch_packed_object, &sa, 0);
8b4c0103
JT
478 if (repository_format_partial_clone)
479 warning("This repository has extensions.partialClone set. Some objects may not be loaded.");
3115ee45 480
6a951937
JK
481 cb.opt = opt;
482 cb.expand = &data;
910650d2 483 oid_array_for_each_unique(&sa, batch_object_cb, &cb);
3115ee45 484
910650d2 485 oid_array_clear(&sa);
6a951937
JK
486 return 0;
487 }
488
25fba78d
JK
489 /*
490 * We are going to call get_sha1 on a potentially very large number of
491 * objects. In most large cases, these will be actual object sha1s. The
492 * cost to double-check that each one is not also a ref (just so we can
493 * warn) ends up dwarfing the actual cost of the object lookups
494 * themselves. We can work around it by just turning off the warning.
495 */
a42fcd15 496 save_warning = warn_on_object_refname_ambiguity;
25fba78d
JK
497 warn_on_object_refname_ambiguity = 0;
498
b42ca3dd 499 while (strbuf_getline(&buf, stdin) != EOF) {
97be0407
JK
500 if (data.split_on_whitespace) {
501 /*
502 * Split at first whitespace, tying off the beginning
503 * of the string and saving the remainder (or NULL) in
504 * data.rest.
505 */
506 char *p = strpbrk(buf.buf, " \t");
507 if (p) {
508 while (*p && strchr(" \t", *p))
509 *p++ = '\0';
510 }
511 data.rest = p;
512 }
513
82330950 514 batch_one_object(buf.buf, opt, &data);
05d5667f
AR
515 }
516
648027c4 517 strbuf_release(&buf);
a42fcd15 518 warn_on_object_refname_ambiguity = save_warning;
07e23839 519 return retval;
05d5667f
AR
520}
521
15d8e565 522static const char * const cat_file_usage[] = {
7889ed25
JH
523 N_("git cat-file (-t [--allow-unknown-type] | -s [--allow-unknown-type] | -e | -p | <type> | --textconv | --filters) [--path=<path>] <object>"),
524 N_("git cat-file (--batch | --batch-check) [--follow-symlinks] [--textconv | --filters]"),
15d8e565
MB
525 NULL
526};
4814dbe8 527
e5fba602
CP
528static int git_cat_file_config(const char *var, const char *value, void *cb)
529{
6680a087 530 if (userdiff_config(var, value) < 0)
e5fba602 531 return -1;
e5fba602
CP
532
533 return git_default_config(var, value, cb);
534}
535
b71bd480
JK
536static int batch_option_callback(const struct option *opt,
537 const char *arg,
538 int unset)
539{
540 struct batch_options *bo = opt->value;
541
122d5346
DT
542 if (bo->enabled) {
543 return 1;
b71bd480
JK
544 }
545
546 bo->enabled = 1;
547 bo->print_contents = !strcmp(opt->long_name, "batch");
93d2a607 548 bo->format = arg;
b71bd480
JK
549
550 return 0;
551}
552
9cf71b17
AR
553int cmd_cat_file(int argc, const char **argv, const char *prefix)
554{
b71bd480 555 int opt = 0;
4814dbe8 556 const char *exp_type = NULL, *obj_name = NULL;
b71bd480 557 struct batch_options batch = {0};
39e4ae38 558 int unknown_type = 0;
9cf71b17 559
15d8e565 560 const struct option options[] = {
d68faec7 561 OPT_GROUP(N_("<type> can be one of: blob, tree, commit, tag")),
b48158ac
KN
562 OPT_CMDMODE('t', NULL, &opt, N_("show object type"), 't'),
563 OPT_CMDMODE('s', NULL, &opt, N_("show object size"), 's'),
564 OPT_CMDMODE('e', NULL, &opt,
d68faec7 565 N_("exit with zero when there's no error"), 'e'),
b48158ac
KN
566 OPT_CMDMODE('p', NULL, &opt, N_("pretty-print object's content"), 'p'),
567 OPT_CMDMODE(0, "textconv", &opt,
d68faec7 568 N_("for blob objects, run textconv on object's content"), 'c'),
b9e62f60
JS
569 OPT_CMDMODE(0, "filters", &opt,
570 N_("for blob objects, run filters on object's content"), 'w'),
7bcf3414
JS
571 OPT_STRING(0, "path", &force_path, N_("blob"),
572 N_("use a specific path for --textconv/--filters")),
ad42f28d 573 OPT_BOOL(0, "allow-unknown-type", &unknown_type,
39e4ae38 574 N_("allow -s and -t to work with broken/corrupt objects")),
fc4937c3 575 OPT_BOOL(0, "buffer", &batch.buffer_output, N_("buffer --batch output")),
93d2a607 576 { OPTION_CALLBACK, 0, "batch", &batch, "format",
b71bd480 577 N_("show info and content of objects fed from the standard input"),
93d2a607
JK
578 PARSE_OPT_OPTARG, batch_option_callback },
579 { OPTION_CALLBACK, 0, "batch-check", &batch, "format",
b71bd480 580 N_("show info about objects fed from the standard input"),
93d2a607 581 PARSE_OPT_OPTARG, batch_option_callback },
122d5346
DT
582 OPT_BOOL(0, "follow-symlinks", &batch.follow_symlinks,
583 N_("follow in-tree symlinks (used with --batch or --batch-check)")),
6a951937
JK
584 OPT_BOOL(0, "batch-all-objects", &batch.all_objects,
585 N_("show all objects with --batch or --batch-check")),
15d8e565
MB
586 OPT_END()
587 };
a8128ed6 588
e5fba602 589 git_config(git_cat_file_config, NULL);
4814dbe8 590
6a36e1e7 591 batch.buffer_output = -1;
37782920 592 argc = parse_options(argc, argv, prefix, options, cat_file_usage, 0);
05d5667f 593
15d8e565 594 if (opt) {
32145943
JS
595 if (batch.enabled && (opt == 'c' || opt == 'w'))
596 batch.cmdmode = opt;
597 else if (argc == 1)
15d8e565
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598 obj_name = argv[0];
599 else
600 usage_with_options(cat_file_usage, options);
601 }
b71bd480 602 if (!opt && !batch.enabled) {
15d8e565
MB
603 if (argc == 2) {
604 exp_type = argv[0];
605 obj_name = argv[1];
606 } else
607 usage_with_options(cat_file_usage, options);
608 }
32145943
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609 if (batch.enabled) {
610 if (batch.cmdmode != opt || argc)
611 usage_with_options(cat_file_usage, options);
612 if (batch.cmdmode && batch.all_objects)
613 die("--batch-all-objects cannot be combined with "
614 "--textconv nor with --filters");
9cf71b17
AR
615 }
616
6a951937 617 if ((batch.follow_symlinks || batch.all_objects) && !batch.enabled) {
122d5346
DT
618 usage_with_options(cat_file_usage, options);
619 }
620
7bcf3414
JS
621 if (force_path && opt != 'c' && opt != 'w') {
622 error("--path=<path> needs --textconv or --filters");
623 usage_with_options(cat_file_usage, options);
624 }
625
32145943
JS
626 if (force_path && batch.enabled) {
627 error("--path=<path> incompatible with --batch");
628 usage_with_options(cat_file_usage, options);
629 }
630
6a36e1e7
JK
631 if (batch.buffer_output < 0)
632 batch.buffer_output = batch.all_objects;
633
b71bd480
JK
634 if (batch.enabled)
635 return batch_objects(&batch);
05d5667f 636
39e4ae38
KN
637 if (unknown_type && opt != 't' && opt != 's')
638 die("git cat-file --allow-unknown-type: use with -s or -t");
639 return cat_one_file(opt, exp_type, obj_name, unknown_type);
9cf71b17 640}