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Commit | Line | Data |
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8bc9a0c7 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
e83c5163 | 6 | #include "cache.h" |
f81daefe | 7 | #include "builtin.h" |
15d8e565 | 8 | #include "parse-options.h" |
e5fba602 | 9 | #include "userdiff.h" |
00c8fd49 | 10 | #include "streaming.h" |
15d8e565 | 11 | |
9cf71b17 | 12 | static int cat_one_file(int opt, const char *exp_type, const char *obj_name) |
e83c5163 LT |
13 | { |
14 | unsigned char sha1[20]; | |
21666f1a | 15 | enum object_type type; |
e5fba602 | 16 | char *buf; |
e83c5163 | 17 | unsigned long size; |
e5fba602 | 18 | struct object_context obj_context; |
2b6854c8 | 19 | |
33bd598c | 20 | if (get_sha1_with_context(obj_name, 0, sha1, &obj_context)) |
2b6854c8 | 21 | die("Not a valid object name %s", obj_name); |
7950571a | 22 | |
7950571a PA |
23 | buf = NULL; |
24 | switch (opt) { | |
25 | case 't': | |
21666f1a NP |
26 | type = sha1_object_info(sha1, NULL); |
27 | if (type > 0) { | |
28 | printf("%s\n", typename(type)); | |
f2a06330 | 29 | return 0; |
11e7d5c5 | 30 | } |
7950571a PA |
31 | break; |
32 | ||
33 | case 's': | |
21666f1a NP |
34 | type = sha1_object_info(sha1, &size); |
35 | if (type > 0) { | |
7950571a PA |
36 | printf("%lu\n", size); |
37 | return 0; | |
38 | } | |
39 | break; | |
40 | ||
41 | case 'e': | |
42 | return !has_sha1_file(sha1); | |
43 | ||
3ac21617 MG |
44 | case 'c': |
45 | if (!obj_context.path[0]) | |
46 | die("git cat-file --textconv %s: <object> must be <sha1:path>", | |
47 | obj_name); | |
48 | ||
49 | if (textconv_object(obj_context.path, obj_context.mode, sha1, 1, &buf, &size)) | |
50 | break; | |
51 | ||
a0f15fa5 | 52 | case 'p': |
21666f1a NP |
53 | type = sha1_object_info(sha1, NULL); |
54 | if (type < 0) | |
2b6854c8 | 55 | die("Not a valid object name %s", obj_name); |
a0f15fa5 JH |
56 | |
57 | /* custom pretty-print here */ | |
2b6854c8 | 58 | if (type == OBJ_TREE) { |
66dbfd55 GV |
59 | const char *ls_args[3] = { NULL }; |
60 | ls_args[0] = "ls-tree"; | |
61 | ls_args[1] = obj_name; | |
2b6854c8 SP |
62 | return cmd_ls_tree(2, ls_args, NULL); |
63 | } | |
a0f15fa5 | 64 | |
00c8fd49 NTND |
65 | if (type == OBJ_BLOB) |
66 | return stream_blob_to_fd(1, sha1, NULL, 0); | |
21666f1a | 67 | buf = read_sha1_file(sha1, &type, &size); |
a0f15fa5 | 68 | if (!buf) |
2b6854c8 | 69 | die("Cannot read object %s", obj_name); |
a0f15fa5 JH |
70 | |
71 | /* otherwise just spit out the data */ | |
72 | break; | |
e5fba602 | 73 | |
7950571a | 74 | case 0: |
00c8fd49 NTND |
75 | if (type_from_string(exp_type) == OBJ_BLOB) { |
76 | unsigned char blob_sha1[20]; | |
77 | if (sha1_object_info(sha1, NULL) == OBJ_TAG) { | |
00c8fd49 | 78 | char *buffer = read_sha1_file(sha1, &type, &size); |
e3f1da98 RS |
79 | const char *target; |
80 | if (!skip_prefix(buffer, "object ", &target) || | |
81 | get_sha1_hex(target, blob_sha1)) | |
00c8fd49 NTND |
82 | die("%s not a valid tag", sha1_to_hex(sha1)); |
83 | free(buffer); | |
84 | } else | |
85 | hashcpy(blob_sha1, sha1); | |
86 | ||
87 | if (sha1_object_info(blob_sha1, NULL) == OBJ_BLOB) | |
88 | return stream_blob_to_fd(1, blob_sha1, NULL, 0); | |
89 | /* | |
90 | * we attempted to dereference a tag to a blob | |
91 | * and failed; there may be new dereference | |
92 | * mechanisms this code is not aware of. | |
93 | * fall-back to the usual case. | |
94 | */ | |
95 | } | |
2b6854c8 | 96 | buf = read_object_with_reference(sha1, exp_type, &size, NULL); |
7950571a PA |
97 | break; |
98 | ||
99 | default: | |
d7530708 | 100 | die("git cat-file: unknown option: %s", exp_type); |
bf0c6e83 LT |
101 | } |
102 | ||
11e7d5c5 | 103 | if (!buf) |
34baebce | 104 | die("git cat-file %s: bad file", obj_name); |
11e7d5c5 | 105 | |
7230e6d0 | 106 | write_or_die(1, buf, size); |
bf0c6e83 | 107 | return 0; |
e83c5163 | 108 | } |
9cf71b17 | 109 | |
93d2a607 JK |
110 | struct expand_data { |
111 | unsigned char sha1[20]; | |
112 | enum object_type type; | |
113 | unsigned long size; | |
a4ac1061 | 114 | unsigned long disk_size; |
97be0407 | 115 | const char *rest; |
65ea9c3c | 116 | unsigned char delta_base_sha1[20]; |
93d2a607 JK |
117 | |
118 | /* | |
119 | * If mark_query is true, we do not expand anything, but rather | |
120 | * just mark the object_info with items we wish to query. | |
121 | */ | |
122 | int mark_query; | |
123 | ||
97be0407 JK |
124 | /* |
125 | * Whether to split the input on whitespace before feeding it to | |
126 | * get_sha1; this is decided during the mark_query phase based on | |
127 | * whether we have a %(rest) token in our format. | |
128 | */ | |
129 | int split_on_whitespace; | |
130 | ||
93d2a607 JK |
131 | /* |
132 | * After a mark_query run, this object_info is set up to be | |
133 | * passed to sha1_object_info_extended. It will point to the data | |
134 | * elements above, so you can retrieve the response from there. | |
135 | */ | |
136 | struct object_info info; | |
137 | }; | |
138 | ||
139 | static int is_atom(const char *atom, const char *s, int slen) | |
140 | { | |
141 | int alen = strlen(atom); | |
142 | return alen == slen && !memcmp(atom, s, alen); | |
143 | } | |
144 | ||
145 | static void expand_atom(struct strbuf *sb, const char *atom, int len, | |
146 | void *vdata) | |
147 | { | |
148 | struct expand_data *data = vdata; | |
149 | ||
150 | if (is_atom("objectname", atom, len)) { | |
151 | if (!data->mark_query) | |
152 | strbuf_addstr(sb, sha1_to_hex(data->sha1)); | |
153 | } else if (is_atom("objecttype", atom, len)) { | |
5b086407 JK |
154 | if (data->mark_query) |
155 | data->info.typep = &data->type; | |
156 | else | |
93d2a607 JK |
157 | strbuf_addstr(sb, typename(data->type)); |
158 | } else if (is_atom("objectsize", atom, len)) { | |
159 | if (data->mark_query) | |
160 | data->info.sizep = &data->size; | |
161 | else | |
162 | strbuf_addf(sb, "%lu", data->size); | |
a4ac1061 JK |
163 | } else if (is_atom("objectsize:disk", atom, len)) { |
164 | if (data->mark_query) | |
165 | data->info.disk_sizep = &data->disk_size; | |
166 | else | |
167 | strbuf_addf(sb, "%lu", data->disk_size); | |
97be0407 JK |
168 | } else if (is_atom("rest", atom, len)) { |
169 | if (data->mark_query) | |
170 | data->split_on_whitespace = 1; | |
171 | else if (data->rest) | |
172 | strbuf_addstr(sb, data->rest); | |
65ea9c3c JK |
173 | } else if (is_atom("deltabase", atom, len)) { |
174 | if (data->mark_query) | |
175 | data->info.delta_base_sha1 = data->delta_base_sha1; | |
176 | else | |
177 | strbuf_addstr(sb, sha1_to_hex(data->delta_base_sha1)); | |
93d2a607 JK |
178 | } else |
179 | die("unknown format element: %.*s", len, atom); | |
180 | } | |
181 | ||
182 | static size_t expand_format(struct strbuf *sb, const char *start, void *data) | |
183 | { | |
184 | const char *end; | |
185 | ||
186 | if (*start != '(') | |
187 | return 0; | |
188 | end = strchr(start + 1, ')'); | |
189 | if (!end) | |
190 | die("format element '%s' does not end in ')'", start); | |
191 | ||
192 | expand_atom(sb, start + 1, end - start - 1, data); | |
193 | ||
194 | return end - start + 1; | |
195 | } | |
196 | ||
370c9268 | 197 | static void print_object_or_die(int fd, struct expand_data *data) |
98e2092b | 198 | { |
370c9268 JK |
199 | const unsigned char *sha1 = data->sha1; |
200 | ||
6554dfa9 JK |
201 | assert(data->info.typep); |
202 | ||
370c9268 | 203 | if (data->type == OBJ_BLOB) { |
98e2092b JK |
204 | if (stream_blob_to_fd(fd, sha1, NULL, 0) < 0) |
205 | die("unable to stream %s to stdout", sha1_to_hex(sha1)); | |
206 | } | |
207 | else { | |
370c9268 JK |
208 | enum object_type type; |
209 | unsigned long size; | |
98e2092b JK |
210 | void *contents; |
211 | ||
370c9268 | 212 | contents = read_sha1_file(sha1, &type, &size); |
98e2092b JK |
213 | if (!contents) |
214 | die("object %s disappeared", sha1_to_hex(sha1)); | |
370c9268 | 215 | if (type != data->type) |
98e2092b | 216 | die("object %s changed type!?", sha1_to_hex(sha1)); |
6554dfa9 | 217 | if (data->info.sizep && size != data->size) |
370c9268 | 218 | die("object %s changed size!?", sha1_to_hex(sha1)); |
98e2092b JK |
219 | |
220 | write_or_die(fd, contents, size); | |
221 | free(contents); | |
222 | } | |
223 | } | |
224 | ||
b71bd480 JK |
225 | struct batch_options { |
226 | int enabled; | |
227 | int print_contents; | |
93d2a607 | 228 | const char *format; |
b71bd480 JK |
229 | }; |
230 | ||
93d2a607 JK |
231 | static int batch_one_object(const char *obj_name, struct batch_options *opt, |
232 | struct expand_data *data) | |
05d5667f | 233 | { |
93d2a607 | 234 | struct strbuf buf = STRBUF_INIT; |
05d5667f AR |
235 | |
236 | if (!obj_name) | |
237 | return 1; | |
238 | ||
93d2a607 | 239 | if (get_sha1(obj_name, data->sha1)) { |
05d5667f | 240 | printf("%s missing\n", obj_name); |
422b2063 | 241 | fflush(stdout); |
05d5667f AR |
242 | return 0; |
243 | } | |
244 | ||
de7b5d62 | 245 | if (sha1_object_info_extended(data->sha1, &data->info, LOOKUP_REPLACE_OBJECT) < 0) { |
3c076dbe LW |
246 | printf("%s missing\n", obj_name); |
247 | fflush(stdout); | |
248 | return 0; | |
249 | } | |
05d5667f | 250 | |
93d2a607 JK |
251 | strbuf_expand(&buf, opt->format, expand_format, data); |
252 | strbuf_addch(&buf, '\n'); | |
253 | write_or_die(1, buf.buf, buf.len); | |
254 | strbuf_release(&buf); | |
a8128ed6 | 255 | |
b71bd480 | 256 | if (opt->print_contents) { |
370c9268 | 257 | print_object_or_die(1, data); |
98e2092b | 258 | write_or_die(1, "\n", 1); |
a8128ed6 | 259 | } |
05d5667f AR |
260 | return 0; |
261 | } | |
262 | ||
b71bd480 | 263 | static int batch_objects(struct batch_options *opt) |
05d5667f | 264 | { |
f285a2d7 | 265 | struct strbuf buf = STRBUF_INIT; |
93d2a607 | 266 | struct expand_data data; |
a42fcd15 | 267 | int save_warning; |
07e23839 | 268 | int retval = 0; |
93d2a607 JK |
269 | |
270 | if (!opt->format) | |
271 | opt->format = "%(objectname) %(objecttype) %(objectsize)"; | |
272 | ||
273 | /* | |
274 | * Expand once with our special mark_query flag, which will prime the | |
275 | * object_info to be handed to sha1_object_info_extended for each | |
276 | * object. | |
277 | */ | |
278 | memset(&data, 0, sizeof(data)); | |
279 | data.mark_query = 1; | |
280 | strbuf_expand(&buf, opt->format, expand_format, &data); | |
281 | data.mark_query = 0; | |
05d5667f | 282 | |
6554dfa9 JK |
283 | /* |
284 | * If we are printing out the object, then always fill in the type, | |
285 | * since we will want to decide whether or not to stream. | |
286 | */ | |
287 | if (opt->print_contents) | |
288 | data.info.typep = &data.type; | |
289 | ||
25fba78d JK |
290 | /* |
291 | * We are going to call get_sha1 on a potentially very large number of | |
292 | * objects. In most large cases, these will be actual object sha1s. The | |
293 | * cost to double-check that each one is not also a ref (just so we can | |
294 | * warn) ends up dwarfing the actual cost of the object lookups | |
295 | * themselves. We can work around it by just turning off the warning. | |
296 | */ | |
a42fcd15 | 297 | save_warning = warn_on_object_refname_ambiguity; |
25fba78d JK |
298 | warn_on_object_refname_ambiguity = 0; |
299 | ||
05d5667f | 300 | while (strbuf_getline(&buf, stdin, '\n') != EOF) { |
97be0407 JK |
301 | if (data.split_on_whitespace) { |
302 | /* | |
303 | * Split at first whitespace, tying off the beginning | |
304 | * of the string and saving the remainder (or NULL) in | |
305 | * data.rest. | |
306 | */ | |
307 | char *p = strpbrk(buf.buf, " \t"); | |
308 | if (p) { | |
309 | while (*p && strchr(" \t", *p)) | |
310 | *p++ = '\0'; | |
311 | } | |
312 | data.rest = p; | |
313 | } | |
314 | ||
07e23839 JK |
315 | retval = batch_one_object(buf.buf, opt, &data); |
316 | if (retval) | |
317 | break; | |
05d5667f AR |
318 | } |
319 | ||
648027c4 | 320 | strbuf_release(&buf); |
a42fcd15 | 321 | warn_on_object_refname_ambiguity = save_warning; |
07e23839 | 322 | return retval; |
05d5667f AR |
323 | } |
324 | ||
15d8e565 | 325 | static const char * const cat_file_usage[] = { |
9c9b4f2f AH |
326 | N_("git cat-file (-t | -s | -e | -p | <type> | --textconv) <object>"), |
327 | N_("git cat-file (--batch | --batch-check) < <list-of-objects>"), | |
15d8e565 MB |
328 | NULL |
329 | }; | |
4814dbe8 | 330 | |
e5fba602 CP |
331 | static int git_cat_file_config(const char *var, const char *value, void *cb) |
332 | { | |
6680a087 | 333 | if (userdiff_config(var, value) < 0) |
e5fba602 | 334 | return -1; |
e5fba602 CP |
335 | |
336 | return git_default_config(var, value, cb); | |
337 | } | |
338 | ||
b71bd480 JK |
339 | static int batch_option_callback(const struct option *opt, |
340 | const char *arg, | |
341 | int unset) | |
342 | { | |
343 | struct batch_options *bo = opt->value; | |
344 | ||
345 | if (unset) { | |
346 | memset(bo, 0, sizeof(*bo)); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | bo->enabled = 1; | |
351 | bo->print_contents = !strcmp(opt->long_name, "batch"); | |
93d2a607 | 352 | bo->format = arg; |
b71bd480 JK |
353 | |
354 | return 0; | |
355 | } | |
356 | ||
9cf71b17 AR |
357 | int cmd_cat_file(int argc, const char **argv, const char *prefix) |
358 | { | |
b71bd480 | 359 | int opt = 0; |
4814dbe8 | 360 | const char *exp_type = NULL, *obj_name = NULL; |
b71bd480 | 361 | struct batch_options batch = {0}; |
9cf71b17 | 362 | |
15d8e565 | 363 | const struct option options[] = { |
d68faec7 NTND |
364 | OPT_GROUP(N_("<type> can be one of: blob, tree, commit, tag")), |
365 | OPT_SET_INT('t', NULL, &opt, N_("show object type"), 't'), | |
366 | OPT_SET_INT('s', NULL, &opt, N_("show object size"), 's'), | |
15d8e565 | 367 | OPT_SET_INT('e', NULL, &opt, |
d68faec7 NTND |
368 | N_("exit with zero when there's no error"), 'e'), |
369 | OPT_SET_INT('p', NULL, &opt, N_("pretty-print object's content"), 'p'), | |
e5fba602 | 370 | OPT_SET_INT(0, "textconv", &opt, |
d68faec7 | 371 | N_("for blob objects, run textconv on object's content"), 'c'), |
93d2a607 | 372 | { OPTION_CALLBACK, 0, "batch", &batch, "format", |
b71bd480 | 373 | N_("show info and content of objects fed from the standard input"), |
93d2a607 JK |
374 | PARSE_OPT_OPTARG, batch_option_callback }, |
375 | { OPTION_CALLBACK, 0, "batch-check", &batch, "format", | |
b71bd480 | 376 | N_("show info about objects fed from the standard input"), |
93d2a607 | 377 | PARSE_OPT_OPTARG, batch_option_callback }, |
15d8e565 MB |
378 | OPT_END() |
379 | }; | |
a8128ed6 | 380 | |
e5fba602 | 381 | git_config(git_cat_file_config, NULL); |
4814dbe8 | 382 | |
15d8e565 MB |
383 | if (argc != 3 && argc != 2) |
384 | usage_with_options(cat_file_usage, options); | |
4814dbe8 | 385 | |
37782920 | 386 | argc = parse_options(argc, argv, prefix, options, cat_file_usage, 0); |
05d5667f | 387 | |
15d8e565 MB |
388 | if (opt) { |
389 | if (argc == 1) | |
390 | obj_name = argv[0]; | |
391 | else | |
392 | usage_with_options(cat_file_usage, options); | |
393 | } | |
b71bd480 | 394 | if (!opt && !batch.enabled) { |
15d8e565 MB |
395 | if (argc == 2) { |
396 | exp_type = argv[0]; | |
397 | obj_name = argv[1]; | |
398 | } else | |
399 | usage_with_options(cat_file_usage, options); | |
400 | } | |
b71bd480 | 401 | if (batch.enabled && (opt || argc)) { |
15d8e565 | 402 | usage_with_options(cat_file_usage, options); |
9cf71b17 AR |
403 | } |
404 | ||
b71bd480 JK |
405 | if (batch.enabled) |
406 | return batch_objects(&batch); | |
05d5667f | 407 | |
9cf71b17 AR |
408 | return cat_one_file(opt, exp_type, obj_name); |
409 | } |