1 3efd8e31 2022-10-23 thomas /*
  2 3efd8e31 2022-10-23 thomas  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 3efd8e31 2022-10-23 thomas  *
  4 3efd8e31 2022-10-23 thomas  * Permission to use, copy, modify, and distribute this software for any
  5 3efd8e31 2022-10-23 thomas  * purpose with or without fee is hereby granted, provided that the above
  6 3efd8e31 2022-10-23 thomas  * copyright notice and this permission notice appear in all copies.
  7 3efd8e31 2022-10-23 thomas  *
  8 3efd8e31 2022-10-23 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 3efd8e31 2022-10-23 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 3efd8e31 2022-10-23 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 3efd8e31 2022-10-23 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 3efd8e31 2022-10-23 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 3efd8e31 2022-10-23 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 3efd8e31 2022-10-23 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 3efd8e31 2022-10-23 thomas  */
 16 3efd8e31 2022-10-23 thomas 
 17 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
 18 3efd8e31 2022-10-23 thomas #include <sys/stat.h>
 19 3efd8e31 2022-10-23 thomas 
 20 3efd8e31 2022-10-23 thomas #include <errno.h>
 21 3efd8e31 2022-10-23 thomas #include <limits.h>
 22 3efd8e31 2022-10-23 thomas #include <stdio.h>
 23 3efd8e31 2022-10-23 thomas #include <stdlib.h>
 24 3efd8e31 2022-10-23 thomas #include <string.h>
 25 3efd8e31 2022-10-23 thomas #include <unistd.h>
 26 3efd8e31 2022-10-23 thomas 
 27 3efd8e31 2022-10-23 thomas #include "got_error.h"
 28 3efd8e31 2022-10-23 thomas #include "got_object.h"
 29 3efd8e31 2022-10-23 thomas #include "got_repository.h"
 30 3efd8e31 2022-10-23 thomas #include "got_path.h"
 31 3efd8e31 2022-10-23 thomas 
 32 3efd8e31 2022-10-23 thomas #include "got_lib_delta.h"
 33 3efd8e31 2022-10-23 thomas #include "got_lib_object.h"
 34 3efd8e31 2022-10-23 thomas #include "got_lib_object_cache.h"
 35 3efd8e31 2022-10-23 thomas #include "got_lib_object_parse.h"
 36 3efd8e31 2022-10-23 thomas #include "got_lib_pack.h"
 37 3efd8e31 2022-10-23 thomas #include "got_lib_repository.h"
 38 3efd8e31 2022-10-23 thomas 
 39 3efd8e31 2022-10-23 thomas const struct got_error *
 40 3efd8e31 2022-10-23 thomas got_object_open_packed(struct got_object **obj, struct got_object_id *id,
 41 3efd8e31 2022-10-23 thomas     struct got_repository *repo)
 42 3efd8e31 2022-10-23 thomas {
 43 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
 44 3efd8e31 2022-10-23 thomas 	struct got_pack *pack = NULL;
 45 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
 46 3efd8e31 2022-10-23 thomas 	int idx;
 47 3efd8e31 2022-10-23 thomas 	char *path_packfile;
 48 3efd8e31 2022-10-23 thomas 
 49 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
 50 3efd8e31 2022-10-23 thomas 	if (err)
 51 3efd8e31 2022-10-23 thomas 		return err;
 52 3efd8e31 2022-10-23 thomas 
 53 3efd8e31 2022-10-23 thomas 	err = got_packidx_get_packfile_path(&path_packfile,
 54 3efd8e31 2022-10-23 thomas 	    packidx->path_packidx);
 55 3efd8e31 2022-10-23 thomas 	if (err)
 56 3efd8e31 2022-10-23 thomas 		return err;
 57 3efd8e31 2022-10-23 thomas 
 58 3efd8e31 2022-10-23 thomas 	pack = got_repo_get_cached_pack(repo, path_packfile);
 59 3efd8e31 2022-10-23 thomas 	if (pack == NULL) {
 60 3efd8e31 2022-10-23 thomas 		err = got_repo_cache_pack(&pack, repo, path_packfile, packidx);
 61 3efd8e31 2022-10-23 thomas 		if (err)
 62 3efd8e31 2022-10-23 thomas 			goto done;
 63 3efd8e31 2022-10-23 thomas 	}
 64 3efd8e31 2022-10-23 thomas 
 65 3efd8e31 2022-10-23 thomas 	err = got_packfile_open_object(obj, pack, packidx, idx, id);
 66 3efd8e31 2022-10-23 thomas 	if (err)
 67 3efd8e31 2022-10-23 thomas 		return err;
 68 3efd8e31 2022-10-23 thomas 	(*obj)->refcnt++;
 69 3efd8e31 2022-10-23 thomas 
 70 3efd8e31 2022-10-23 thomas 	err = got_repo_cache_object(repo, id, *obj);
 71 3efd8e31 2022-10-23 thomas 	if (err) {
 72 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_OBJ_EXISTS ||
 73 3efd8e31 2022-10-23 thomas 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
 74 3efd8e31 2022-10-23 thomas 			err = NULL;
 75 3efd8e31 2022-10-23 thomas 	}
 76 3efd8e31 2022-10-23 thomas done:
 77 3efd8e31 2022-10-23 thomas 	free(path_packfile);
 78 3efd8e31 2022-10-23 thomas 	return err;
 79 3efd8e31 2022-10-23 thomas }
 80 3efd8e31 2022-10-23 thomas 
 81 3efd8e31 2022-10-23 thomas const struct got_error *
 82 3efd8e31 2022-10-23 thomas got_object_open_from_packfile(struct got_object **obj, struct got_object_id *id,
 83 3efd8e31 2022-10-23 thomas     struct got_pack *pack, struct got_packidx *packidx, int obj_idx,
 84 3efd8e31 2022-10-23 thomas     struct got_repository *repo)
 85 3efd8e31 2022-10-23 thomas {
 86 6d7eb4f7 2023-04-04 thomas 	const struct got_error *err;
 87 6d7eb4f7 2023-04-04 thomas 
 88 6d7eb4f7 2023-04-04 thomas 	*obj = got_repo_get_cached_object(repo, id);
 89 6d7eb4f7 2023-04-04 thomas 	if (*obj != NULL) {
 90 6d7eb4f7 2023-04-04 thomas 		(*obj)->refcnt++;
 91 6d7eb4f7 2023-04-04 thomas 		return NULL;
 92 6d7eb4f7 2023-04-04 thomas 	}
 93 6d7eb4f7 2023-04-04 thomas 
 94 6d7eb4f7 2023-04-04 thomas 	err = got_packfile_open_object(obj, pack, packidx, obj_idx, id);
 95 6d7eb4f7 2023-04-04 thomas 	if (err)
 96 6d7eb4f7 2023-04-04 thomas 		return err;
 97 6d7eb4f7 2023-04-04 thomas 	(*obj)->refcnt++;
 98 6d7eb4f7 2023-04-04 thomas 
 99 6d7eb4f7 2023-04-04 thomas 	err = got_repo_cache_object(repo, id, *obj);
100 6d7eb4f7 2023-04-04 thomas 	if (err) {
101 6d7eb4f7 2023-04-04 thomas 		if (err->code == GOT_ERR_OBJ_EXISTS ||
102 6d7eb4f7 2023-04-04 thomas 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
103 6d7eb4f7 2023-04-04 thomas 			err = NULL;
104 6d7eb4f7 2023-04-04 thomas 		return err;
105 6d7eb4f7 2023-04-04 thomas 	}
106 6d7eb4f7 2023-04-04 thomas 	(*obj)->refcnt++;
107 6d7eb4f7 2023-04-04 thomas 	return NULL;
108 3efd8e31 2022-10-23 thomas }
109 3efd8e31 2022-10-23 thomas 
110 3efd8e31 2022-10-23 thomas const struct got_error *
111 3efd8e31 2022-10-23 thomas got_object_read_raw_delta(uint64_t *base_size, uint64_t *result_size,
112 3efd8e31 2022-10-23 thomas     off_t *delta_size, off_t *delta_compressed_size, off_t *delta_offset,
113 3efd8e31 2022-10-23 thomas     off_t *delta_out_offset, struct got_object_id **base_id, int delta_cache_fd,
114 3efd8e31 2022-10-23 thomas     struct got_packidx *packidx, int obj_idx, struct got_object_id *id,
115 3efd8e31 2022-10-23 thomas     struct got_repository *repo)
116 3efd8e31 2022-10-23 thomas {
117 3efd8e31 2022-10-23 thomas 	return got_error(GOT_ERR_NOT_IMPL);
118 3efd8e31 2022-10-23 thomas }
119 3efd8e31 2022-10-23 thomas 
120 3efd8e31 2022-10-23 thomas const struct got_error *
121 3efd8e31 2022-10-23 thomas got_object_open(struct got_object **obj, struct got_repository *repo,
122 3efd8e31 2022-10-23 thomas     struct got_object_id *id)
123 3efd8e31 2022-10-23 thomas {
124 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
125 3efd8e31 2022-10-23 thomas 	int fd;
126 3efd8e31 2022-10-23 thomas 
127 3efd8e31 2022-10-23 thomas 	*obj = got_repo_get_cached_object(repo, id);
128 3efd8e31 2022-10-23 thomas 	if (*obj != NULL) {
129 3efd8e31 2022-10-23 thomas 		(*obj)->refcnt++;
130 3efd8e31 2022-10-23 thomas 		return NULL;
131 3efd8e31 2022-10-23 thomas 	}
132 3efd8e31 2022-10-23 thomas 
133 3efd8e31 2022-10-23 thomas 	err = got_object_open_packed(obj, id, repo);
134 3efd8e31 2022-10-23 thomas 	if (err) {
135 3efd8e31 2022-10-23 thomas 		if (err->code != GOT_ERR_NO_OBJ)
136 3efd8e31 2022-10-23 thomas 			return err;
137 3efd8e31 2022-10-23 thomas 	} else
138 3efd8e31 2022-10-23 thomas 		return NULL;
139 3efd8e31 2022-10-23 thomas 
140 3efd8e31 2022-10-23 thomas 	err = got_object_open_loose_fd(&fd, id, repo);
141 3efd8e31 2022-10-23 thomas 	if (err) {
142 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_ERRNO && errno == ENOENT)
143 3efd8e31 2022-10-23 thomas 			err = got_error_no_obj(id);
144 3efd8e31 2022-10-23 thomas 		return err;
145 3efd8e31 2022-10-23 thomas 	}
146 3efd8e31 2022-10-23 thomas 
147 3efd8e31 2022-10-23 thomas 	err = got_object_read_header(obj, fd);
148 3efd8e31 2022-10-23 thomas 	if (err)
149 3efd8e31 2022-10-23 thomas 		goto done;
150 3efd8e31 2022-10-23 thomas 
151 3efd8e31 2022-10-23 thomas 	memcpy(&(*obj)->id, id, sizeof((*obj)->id));
152 3efd8e31 2022-10-23 thomas 	(*obj)->refcnt++;
153 3efd8e31 2022-10-23 thomas 
154 3efd8e31 2022-10-23 thomas 	err = got_repo_cache_object(repo, id, *obj);
155 3efd8e31 2022-10-23 thomas 	if (err) {
156 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_OBJ_EXISTS ||
157 3efd8e31 2022-10-23 thomas 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
158 3efd8e31 2022-10-23 thomas 			err = NULL;
159 3efd8e31 2022-10-23 thomas 	}
160 3efd8e31 2022-10-23 thomas done:
161 3efd8e31 2022-10-23 thomas 	if (close(fd) == -1 && err == NULL)
162 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("close");
163 3efd8e31 2022-10-23 thomas 	return err;
164 3efd8e31 2022-10-23 thomas }
165 3efd8e31 2022-10-23 thomas 
166 3efd8e31 2022-10-23 thomas static const struct got_error *
167 3efd8e31 2022-10-23 thomas wrap_fd(FILE **f, int wrapped_fd)
168 3efd8e31 2022-10-23 thomas {
169 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
170 3efd8e31 2022-10-23 thomas 	int fd;
171 3efd8e31 2022-10-23 thomas 
172 3efd8e31 2022-10-23 thomas 	if (ftruncate(wrapped_fd, 0L) == -1)
173 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("ftruncate");
174 3efd8e31 2022-10-23 thomas 
175 3efd8e31 2022-10-23 thomas 	if (lseek(wrapped_fd, 0L, SEEK_SET) == -1)
176 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("lseek");
177 3efd8e31 2022-10-23 thomas 
178 3efd8e31 2022-10-23 thomas 	fd = dup(wrapped_fd);
179 3efd8e31 2022-10-23 thomas 	if (fd == -1)
180 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("dup");
181 3efd8e31 2022-10-23 thomas 
182 3efd8e31 2022-10-23 thomas 	*f = fdopen(fd, "w+");
183 3efd8e31 2022-10-23 thomas 	if (*f == NULL) {
184 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fdopen");
185 3efd8e31 2022-10-23 thomas 		close(fd);
186 3efd8e31 2022-10-23 thomas 	}
187 3efd8e31 2022-10-23 thomas 	return err;
188 3efd8e31 2022-10-23 thomas }
189 3efd8e31 2022-10-23 thomas 
190 3efd8e31 2022-10-23 thomas static const struct got_error *
191 3efd8e31 2022-10-23 thomas read_packed_object_raw(uint8_t **outbuf, off_t *size, size_t *hdrlen,
192 3efd8e31 2022-10-23 thomas     int outfd, struct got_pack *pack, struct got_packidx *packidx, int idx,
193 3efd8e31 2022-10-23 thomas     struct got_object_id *id)
194 3efd8e31 2022-10-23 thomas {
195 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
196 3efd8e31 2022-10-23 thomas 	uint64_t raw_size = 0;
197 3efd8e31 2022-10-23 thomas 	struct got_object *obj;
198 3efd8e31 2022-10-23 thomas 	FILE *outfile = NULL, *basefile = NULL, *accumfile = NULL;
199 3efd8e31 2022-10-23 thomas 
200 3efd8e31 2022-10-23 thomas 	*outbuf = NULL;
201 3efd8e31 2022-10-23 thomas 	*size = 0;
202 3efd8e31 2022-10-23 thomas 	*hdrlen = 0;
203 3efd8e31 2022-10-23 thomas 
204 3efd8e31 2022-10-23 thomas 	err = got_packfile_open_object(&obj, pack, packidx, idx, id);
205 3efd8e31 2022-10-23 thomas 	if (err)
206 3efd8e31 2022-10-23 thomas 		return err;
207 3efd8e31 2022-10-23 thomas 
208 3efd8e31 2022-10-23 thomas 	if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
209 3efd8e31 2022-10-23 thomas 		err = got_pack_get_max_delta_object_size(&raw_size, obj, pack);
210 3efd8e31 2022-10-23 thomas 		if (err)
211 3efd8e31 2022-10-23 thomas 			goto done;
212 3efd8e31 2022-10-23 thomas 	} else
213 3efd8e31 2022-10-23 thomas 		raw_size = obj->size;
214 3efd8e31 2022-10-23 thomas 
215 3efd8e31 2022-10-23 thomas 	if (raw_size <= GOT_DELTA_RESULT_SIZE_CACHED_MAX) {
216 3efd8e31 2022-10-23 thomas 		size_t len;
217 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object_to_mem(outbuf, &len,
218 3efd8e31 2022-10-23 thomas 		    obj, pack);
219 3efd8e31 2022-10-23 thomas 		if (err)
220 3efd8e31 2022-10-23 thomas 			goto done;
221 3efd8e31 2022-10-23 thomas 		*size = (off_t)len;
222 3efd8e31 2022-10-23 thomas 	} else {
223 3efd8e31 2022-10-23 thomas 		/*
224 3efd8e31 2022-10-23 thomas 		 * XXX This uses 3 file extra descriptors for no good reason.
225 3efd8e31 2022-10-23 thomas 		 * We should have got_packfile_extract_object_to_fd().
226 3efd8e31 2022-10-23 thomas 		 */
227 3efd8e31 2022-10-23 thomas 		err = wrap_fd(&outfile, outfd);
228 3efd8e31 2022-10-23 thomas 		if (err)
229 3efd8e31 2022-10-23 thomas 			goto done;
230 3efd8e31 2022-10-23 thomas 		err = wrap_fd(&basefile, pack->basefd);
231 3efd8e31 2022-10-23 thomas 		if (err)
232 3efd8e31 2022-10-23 thomas 			goto done;
233 3efd8e31 2022-10-23 thomas 		err = wrap_fd(&accumfile, pack->accumfd);
234 3efd8e31 2022-10-23 thomas 		if (err)
235 3efd8e31 2022-10-23 thomas 			goto done;
236 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object(pack, obj, outfile, basefile,
237 3efd8e31 2022-10-23 thomas 		    accumfile);
238 3efd8e31 2022-10-23 thomas 		if (err)
239 3efd8e31 2022-10-23 thomas 			goto done;
240 b296ac1c 2023-01-09 thomas 		*size = obj->size;
241 3efd8e31 2022-10-23 thomas 	}
242 3efd8e31 2022-10-23 thomas 
243 3efd8e31 2022-10-23 thomas 	*hdrlen = obj->hdrlen;
244 3efd8e31 2022-10-23 thomas done:
245 3efd8e31 2022-10-23 thomas 	got_object_close(obj);
246 3efd8e31 2022-10-23 thomas 	if (outfile && fclose(outfile) == EOF && err == NULL)
247 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fclose");
248 3efd8e31 2022-10-23 thomas 	if (basefile && fclose(basefile) == EOF && err == NULL)
249 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fclose");
250 3efd8e31 2022-10-23 thomas 	if (accumfile && fclose(accumfile) == EOF && err == NULL)
251 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("fclose");
252 3efd8e31 2022-10-23 thomas 	return err;
253 3efd8e31 2022-10-23 thomas 
254 3efd8e31 2022-10-23 thomas }
255 3efd8e31 2022-10-23 thomas 
256 3efd8e31 2022-10-23 thomas static void
257 3efd8e31 2022-10-23 thomas put_raw_object_tempfile(struct got_raw_object *obj)
258 3efd8e31 2022-10-23 thomas {
259 3efd8e31 2022-10-23 thomas 	struct got_repository *repo = obj->close_arg;
260 3efd8e31 2022-10-23 thomas 
261 3efd8e31 2022-10-23 thomas 	if (obj->tempfile_idx != -1)
262 3efd8e31 2022-10-23 thomas 		got_repo_temp_fds_put(obj->tempfile_idx, repo);
263 3efd8e31 2022-10-23 thomas }
264 3efd8e31 2022-10-23 thomas 
265 3efd8e31 2022-10-23 thomas /* *outfd must be initialized to -1 by caller */
266 3efd8e31 2022-10-23 thomas const struct got_error *
267 3efd8e31 2022-10-23 thomas got_object_raw_open(struct got_raw_object **obj, int *outfd,
268 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id)
269 3efd8e31 2022-10-23 thomas {
270 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
271 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
272 ab9f7b87 2023-01-09 thomas 	int idx, tempfd, tempfile_idx;
273 3efd8e31 2022-10-23 thomas 	uint8_t *outbuf = NULL;
274 3efd8e31 2022-10-23 thomas 	off_t size = 0;
275 3efd8e31 2022-10-23 thomas 	size_t hdrlen = 0;
276 3efd8e31 2022-10-23 thomas 	char *path_packfile = NULL;
277 3efd8e31 2022-10-23 thomas 
278 3efd8e31 2022-10-23 thomas 	*obj = got_repo_get_cached_raw_object(repo, id);
279 3efd8e31 2022-10-23 thomas 	if (*obj != NULL) {
280 3efd8e31 2022-10-23 thomas 		(*obj)->refcnt++;
281 3efd8e31 2022-10-23 thomas 		return NULL;
282 3efd8e31 2022-10-23 thomas 	}
283 3efd8e31 2022-10-23 thomas 
284 ab9f7b87 2023-01-09 thomas 	err = got_repo_temp_fds_get(&tempfd, &tempfile_idx, repo);
285 ab9f7b87 2023-01-09 thomas 	if (err)
286 ab9f7b87 2023-01-09 thomas 		return err;
287 3efd8e31 2022-10-23 thomas 
288 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
289 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
290 3efd8e31 2022-10-23 thomas 		struct got_pack *pack = NULL;
291 3efd8e31 2022-10-23 thomas 
292 3efd8e31 2022-10-23 thomas 		err = got_packidx_get_packfile_path(&path_packfile,
293 3efd8e31 2022-10-23 thomas 		    packidx->path_packidx);
294 3efd8e31 2022-10-23 thomas 		if (err)
295 3efd8e31 2022-10-23 thomas 			goto done;
296 3efd8e31 2022-10-23 thomas 
297 3efd8e31 2022-10-23 thomas 		pack = got_repo_get_cached_pack(repo, path_packfile);
298 3efd8e31 2022-10-23 thomas 		if (pack == NULL) {
299 3efd8e31 2022-10-23 thomas 			err = got_repo_cache_pack(&pack, repo, path_packfile,
300 3efd8e31 2022-10-23 thomas 			    packidx);
301 3efd8e31 2022-10-23 thomas 			if (err)
302 3efd8e31 2022-10-23 thomas 				goto done;
303 3efd8e31 2022-10-23 thomas 		}
304 3efd8e31 2022-10-23 thomas 		err = read_packed_object_raw(&outbuf, &size, &hdrlen,
305 ab9f7b87 2023-01-09 thomas 		    tempfd, pack, packidx, idx, id);
306 3efd8e31 2022-10-23 thomas 		if (err)
307 3efd8e31 2022-10-23 thomas 			goto done;
308 3efd8e31 2022-10-23 thomas 	} else if (err->code == GOT_ERR_NO_OBJ) {
309 3efd8e31 2022-10-23 thomas 		int fd;
310 3efd8e31 2022-10-23 thomas 
311 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
312 3efd8e31 2022-10-23 thomas 		if (err)
313 3efd8e31 2022-10-23 thomas 			goto done;
314 3efd8e31 2022-10-23 thomas 		err = got_object_read_raw(&outbuf, &size, &hdrlen,
315 ab9f7b87 2023-01-09 thomas 		    GOT_DELTA_RESULT_SIZE_CACHED_MAX, tempfd, id, fd);
316 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
317 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
318 3efd8e31 2022-10-23 thomas 		if (err)
319 ab9f7b87 2023-01-09 thomas 			goto done;
320 ab9f7b87 2023-01-09 thomas 	}
321 ab9f7b87 2023-01-09 thomas 
322 ab9f7b87 2023-01-09 thomas 	if (outbuf == NULL) {
323 ab9f7b87 2023-01-09 thomas 		if (*outfd != -1) {
324 ab9f7b87 2023-01-09 thomas 			err = got_error_msg(GOT_ERR_NOT_IMPL, "bad outfd");
325 ab9f7b87 2023-01-09 thomas 			goto done;
326 ab9f7b87 2023-01-09 thomas 		}
327 ab9f7b87 2023-01-09 thomas 
328 ab9f7b87 2023-01-09 thomas 		/*
329 ab9f7b87 2023-01-09 thomas 		 * Duplicate tempfile descriptor to allow use of
330 ab9f7b87 2023-01-09 thomas 		 * fdopen(3) inside got_object_raw_alloc().
331 ab9f7b87 2023-01-09 thomas 		 */
332 ab9f7b87 2023-01-09 thomas 		*outfd = dup(tempfd);
333 ab9f7b87 2023-01-09 thomas 		if (*outfd == -1) {
334 ab9f7b87 2023-01-09 thomas 			err = got_error_from_errno("dup");
335 3efd8e31 2022-10-23 thomas 			goto done;
336 ab9f7b87 2023-01-09 thomas 		}
337 3efd8e31 2022-10-23 thomas 	}
338 3efd8e31 2022-10-23 thomas 
339 ebe6ec92 2023-01-09 thomas 	err = got_object_raw_alloc(obj, outbuf, outfd,
340 ebe6ec92 2023-01-09 thomas 	    GOT_DELTA_RESULT_SIZE_CACHED_MAX, hdrlen, size);
341 3efd8e31 2022-10-23 thomas 	if (err)
342 3efd8e31 2022-10-23 thomas 		goto done;
343 3efd8e31 2022-10-23 thomas 
344 3efd8e31 2022-10-23 thomas 	err = got_repo_cache_raw_object(repo, id, *obj);
345 3efd8e31 2022-10-23 thomas 	if (err) {
346 3efd8e31 2022-10-23 thomas 		if (err->code == GOT_ERR_OBJ_EXISTS ||
347 3efd8e31 2022-10-23 thomas 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
348 3efd8e31 2022-10-23 thomas 			err = NULL;
349 3efd8e31 2022-10-23 thomas 	}
350 3efd8e31 2022-10-23 thomas done:
351 3efd8e31 2022-10-23 thomas 	free(path_packfile);
352 3efd8e31 2022-10-23 thomas 	if (err) {
353 3efd8e31 2022-10-23 thomas 		if (*obj) {
354 3efd8e31 2022-10-23 thomas 			got_object_raw_close(*obj);
355 3efd8e31 2022-10-23 thomas 			*obj = NULL;
356 3efd8e31 2022-10-23 thomas 		}
357 3efd8e31 2022-10-23 thomas 		free(outbuf);
358 ab9f7b87 2023-01-09 thomas 		got_repo_temp_fds_put(tempfile_idx, repo);
359 ab9f7b87 2023-01-09 thomas 		if (*outfd != -1) {
360 ab9f7b87 2023-01-09 thomas 			close(*outfd);
361 ab9f7b87 2023-01-09 thomas 			*outfd = -1;
362 ab9f7b87 2023-01-09 thomas 		}
363 3efd8e31 2022-10-23 thomas 	} else {
364 ab9f7b87 2023-01-09 thomas 		if (((*obj)->f == NULL && (*obj)->fd == -1)) {
365 ab9f7b87 2023-01-09 thomas 			/* This raw object is not backed by a file. */
366 ab9f7b87 2023-01-09 thomas 			got_repo_temp_fds_put(tempfile_idx, repo);
367 ab9f7b87 2023-01-09 thomas 			if (*outfd != -1) {
368 ab9f7b87 2023-01-09 thomas 				close(*outfd);
369 ab9f7b87 2023-01-09 thomas 				*outfd = -1;
370 ab9f7b87 2023-01-09 thomas 			}
371 ab9f7b87 2023-01-09 thomas 		} else {
372 ab9f7b87 2023-01-09 thomas 			(*obj)->tempfile_idx = tempfile_idx;
373 ab9f7b87 2023-01-09 thomas 			(*obj)->close_cb = put_raw_object_tempfile;
374 ab9f7b87 2023-01-09 thomas 			(*obj)->close_arg = repo;
375 ab9f7b87 2023-01-09 thomas 		}
376 3efd8e31 2022-10-23 thomas 	}
377 3efd8e31 2022-10-23 thomas 	return err;
378 3efd8e31 2022-10-23 thomas }
379 3efd8e31 2022-10-23 thomas 
380 3efd8e31 2022-10-23 thomas static const struct got_error *
381 3efd8e31 2022-10-23 thomas open_commit(struct got_commit_object **commit,
382 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id, int check_cache)
383 3efd8e31 2022-10-23 thomas {
384 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
385 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
386 3efd8e31 2022-10-23 thomas 	int idx;
387 3efd8e31 2022-10-23 thomas 	char *path_packfile = NULL;
388 3efd8e31 2022-10-23 thomas 
389 3efd8e31 2022-10-23 thomas 	if (check_cache) {
390 3efd8e31 2022-10-23 thomas 		*commit = got_repo_get_cached_commit(repo, id);
391 3efd8e31 2022-10-23 thomas 		if (*commit != NULL) {
392 3efd8e31 2022-10-23 thomas 			(*commit)->refcnt++;
393 3efd8e31 2022-10-23 thomas 			return NULL;
394 3efd8e31 2022-10-23 thomas 		}
395 3efd8e31 2022-10-23 thomas 	} else
396 3efd8e31 2022-10-23 thomas 		*commit = NULL;
397 3efd8e31 2022-10-23 thomas 
398 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
399 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
400 3efd8e31 2022-10-23 thomas 		struct got_pack *pack = NULL;
401 3efd8e31 2022-10-23 thomas 		struct got_object *obj;
402 3efd8e31 2022-10-23 thomas 		uint8_t *buf;
403 3efd8e31 2022-10-23 thomas 		size_t len;
404 3efd8e31 2022-10-23 thomas 
405 3efd8e31 2022-10-23 thomas 		err = got_packidx_get_packfile_path(&path_packfile,
406 3efd8e31 2022-10-23 thomas 		    packidx->path_packidx);
407 3efd8e31 2022-10-23 thomas 		if (err)
408 3efd8e31 2022-10-23 thomas 			return err;
409 3efd8e31 2022-10-23 thomas 
410 3efd8e31 2022-10-23 thomas 		pack = got_repo_get_cached_pack(repo, path_packfile);
411 3efd8e31 2022-10-23 thomas 		if (pack == NULL) {
412 3efd8e31 2022-10-23 thomas 			err = got_repo_cache_pack(&pack, repo, path_packfile,
413 3efd8e31 2022-10-23 thomas 			    packidx);
414 3efd8e31 2022-10-23 thomas 			if (err)
415 3efd8e31 2022-10-23 thomas 				goto done;
416 3efd8e31 2022-10-23 thomas 		}
417 3efd8e31 2022-10-23 thomas 		err = got_packfile_open_object(&obj, pack, packidx, idx, id);
418 3efd8e31 2022-10-23 thomas 		if (err)
419 3efd8e31 2022-10-23 thomas 			goto done;
420 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object_to_mem(&buf, &len,
421 3efd8e31 2022-10-23 thomas 		    obj, pack);
422 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
423 3efd8e31 2022-10-23 thomas 		if (err)
424 3efd8e31 2022-10-23 thomas 			goto done;
425 3efd8e31 2022-10-23 thomas 		err = got_object_parse_commit(commit, buf, len);
426 3efd8e31 2022-10-23 thomas 		free(buf);
427 3efd8e31 2022-10-23 thomas 	} else if (err->code == GOT_ERR_NO_OBJ) {
428 3efd8e31 2022-10-23 thomas 		int fd;
429 3efd8e31 2022-10-23 thomas 
430 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
431 3efd8e31 2022-10-23 thomas 		if (err)
432 3efd8e31 2022-10-23 thomas 			return err;
433 3efd8e31 2022-10-23 thomas 		err = got_object_read_commit(commit, fd, id, 0);
434 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
435 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
436 3efd8e31 2022-10-23 thomas 		if (err)
437 3efd8e31 2022-10-23 thomas 			return err;
438 3efd8e31 2022-10-23 thomas 	}
439 3efd8e31 2022-10-23 thomas 
440 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
441 3efd8e31 2022-10-23 thomas 		(*commit)->refcnt++;
442 3efd8e31 2022-10-23 thomas 		err = got_repo_cache_commit(repo, id, *commit);
443 3efd8e31 2022-10-23 thomas 		if (err) {
444 3efd8e31 2022-10-23 thomas 			if (err->code == GOT_ERR_OBJ_EXISTS ||
445 3efd8e31 2022-10-23 thomas 			    err->code == GOT_ERR_OBJ_TOO_LARGE)
446 3efd8e31 2022-10-23 thomas 				err = NULL;
447 3efd8e31 2022-10-23 thomas 		}
448 3efd8e31 2022-10-23 thomas 	}
449 3efd8e31 2022-10-23 thomas done:
450 3efd8e31 2022-10-23 thomas 	free(path_packfile);
451 3efd8e31 2022-10-23 thomas 	return err;
452 3efd8e31 2022-10-23 thomas }
453 3efd8e31 2022-10-23 thomas 
454 3efd8e31 2022-10-23 thomas const struct got_error *
455 3efd8e31 2022-10-23 thomas got_object_open_as_commit(struct got_commit_object **commit,
456 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id)
457 3efd8e31 2022-10-23 thomas {
458 3efd8e31 2022-10-23 thomas 	*commit = got_repo_get_cached_commit(repo, id);
459 3efd8e31 2022-10-23 thomas 	if (*commit != NULL) {
460 3efd8e31 2022-10-23 thomas 		(*commit)->refcnt++;
461 3efd8e31 2022-10-23 thomas 		return NULL;
462 3efd8e31 2022-10-23 thomas 	}
463 3efd8e31 2022-10-23 thomas 
464 3efd8e31 2022-10-23 thomas 	return open_commit(commit, repo, id, 0);
465 3efd8e31 2022-10-23 thomas }
466 3efd8e31 2022-10-23 thomas 
467 3efd8e31 2022-10-23 thomas const struct got_error *
468 3efd8e31 2022-10-23 thomas got_object_commit_open(struct got_commit_object **commit,
469 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object *obj)
470 3efd8e31 2022-10-23 thomas {
471 3efd8e31 2022-10-23 thomas 	return open_commit(commit, repo, got_object_get_id(obj), 1);
472 3efd8e31 2022-10-23 thomas }
473 3efd8e31 2022-10-23 thomas 
474 3efd8e31 2022-10-23 thomas static const struct got_error *
475 3efd8e31 2022-10-23 thomas open_tree(struct got_tree_object **tree,
476 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id, int check_cache)
477 3efd8e31 2022-10-23 thomas {
478 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
479 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
480 3efd8e31 2022-10-23 thomas 	int idx;
481 3efd8e31 2022-10-23 thomas 	char *path_packfile = NULL;
482 3efd8e31 2022-10-23 thomas 	struct got_parsed_tree_entry *entries = NULL;
483 3efd8e31 2022-10-23 thomas 	size_t nentries = 0, nentries_alloc = 0, i;
484 3efd8e31 2022-10-23 thomas 	uint8_t *buf = NULL;
485 3efd8e31 2022-10-23 thomas 
486 3efd8e31 2022-10-23 thomas 	if (check_cache) {
487 3efd8e31 2022-10-23 thomas 		*tree = got_repo_get_cached_tree(repo, id);
488 3efd8e31 2022-10-23 thomas 		if (*tree != NULL) {
489 3efd8e31 2022-10-23 thomas 			(*tree)->refcnt++;
490 3efd8e31 2022-10-23 thomas 			return NULL;
491 3efd8e31 2022-10-23 thomas 		}
492 3efd8e31 2022-10-23 thomas 	} else
493 3efd8e31 2022-10-23 thomas 		*tree = NULL;
494 3efd8e31 2022-10-23 thomas 
495 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
496 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
497 3efd8e31 2022-10-23 thomas 		struct got_pack *pack = NULL;
498 3efd8e31 2022-10-23 thomas 		struct got_object *obj;
499 3efd8e31 2022-10-23 thomas 		size_t len;
500 3efd8e31 2022-10-23 thomas 
501 3efd8e31 2022-10-23 thomas 		err = got_packidx_get_packfile_path(&path_packfile,
502 3efd8e31 2022-10-23 thomas 		    packidx->path_packidx);
503 3efd8e31 2022-10-23 thomas 		if (err)
504 3efd8e31 2022-10-23 thomas 			return err;
505 3efd8e31 2022-10-23 thomas 
506 3efd8e31 2022-10-23 thomas 		pack = got_repo_get_cached_pack(repo, path_packfile);
507 3efd8e31 2022-10-23 thomas 		if (pack == NULL) {
508 3efd8e31 2022-10-23 thomas 			err = got_repo_cache_pack(&pack, repo, path_packfile,
509 3efd8e31 2022-10-23 thomas 			    packidx);
510 3efd8e31 2022-10-23 thomas 			if (err)
511 3efd8e31 2022-10-23 thomas 				goto done;
512 3efd8e31 2022-10-23 thomas 		}
513 3efd8e31 2022-10-23 thomas 		err = got_packfile_open_object(&obj, pack, packidx, idx, id);
514 3efd8e31 2022-10-23 thomas 		if (err)
515 3efd8e31 2022-10-23 thomas 			goto done;
516 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object_to_mem(&buf, &len,
517 3efd8e31 2022-10-23 thomas 		    obj, pack);
518 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
519 3efd8e31 2022-10-23 thomas 		if (err)
520 3efd8e31 2022-10-23 thomas 			goto done;
521 3efd8e31 2022-10-23 thomas 		err = got_object_parse_tree(&entries, &nentries,
522 3efd8e31 2022-10-23 thomas 		    &nentries_alloc, buf, len);
523 3efd8e31 2022-10-23 thomas 		if (err)
524 3efd8e31 2022-10-23 thomas 			goto done;
525 3efd8e31 2022-10-23 thomas 	} else if (err->code == GOT_ERR_NO_OBJ) {
526 3efd8e31 2022-10-23 thomas 		int fd;
527 3efd8e31 2022-10-23 thomas 
528 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
529 3efd8e31 2022-10-23 thomas 		if (err)
530 3efd8e31 2022-10-23 thomas 			return err;
531 3efd8e31 2022-10-23 thomas 		err = got_object_read_tree(&entries, &nentries,
532 3efd8e31 2022-10-23 thomas 		    &nentries_alloc, &buf, fd, id);
533 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
534 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
535 3efd8e31 2022-10-23 thomas 		if (err)
536 3efd8e31 2022-10-23 thomas 			goto done;
537 3efd8e31 2022-10-23 thomas 	} else
538 3efd8e31 2022-10-23 thomas 		goto done;
539 3efd8e31 2022-10-23 thomas 
540 3efd8e31 2022-10-23 thomas 	*tree = malloc(sizeof(**tree));
541 3efd8e31 2022-10-23 thomas 	if (*tree == NULL) {
542 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("malloc");
543 3efd8e31 2022-10-23 thomas 		goto done;
544 3efd8e31 2022-10-23 thomas 	}
545 3efd8e31 2022-10-23 thomas 	(*tree)->entries = calloc(nentries, sizeof(struct got_tree_entry));
546 3efd8e31 2022-10-23 thomas 	if ((*tree)->entries == NULL) {
547 3efd8e31 2022-10-23 thomas 		err = got_error_from_errno("malloc");
548 3efd8e31 2022-10-23 thomas 		goto done;
549 3efd8e31 2022-10-23 thomas 	}
550 3efd8e31 2022-10-23 thomas 	(*tree)->nentries = nentries;
551 3efd8e31 2022-10-23 thomas 	(*tree)->refcnt = 0;
552 3efd8e31 2022-10-23 thomas 
553 3efd8e31 2022-10-23 thomas 	for (i = 0; i < nentries; i++) {
554 3efd8e31 2022-10-23 thomas 		struct got_parsed_tree_entry *pe = &entries[i];
555 3efd8e31 2022-10-23 thomas 		struct got_tree_entry *te = &(*tree)->entries[i];
556 3efd8e31 2022-10-23 thomas 	
557 3efd8e31 2022-10-23 thomas 		if (strlcpy(te->name, pe->name,
558 3efd8e31 2022-10-23 thomas 		    sizeof(te->name)) >= sizeof(te->name)) {
559 3efd8e31 2022-10-23 thomas 			err = got_error(GOT_ERR_NO_SPACE);
560 3efd8e31 2022-10-23 thomas 			goto done;
561 3efd8e31 2022-10-23 thomas 		}
562 3efd8e31 2022-10-23 thomas 		memcpy(te->id.sha1, pe->id, SHA1_DIGEST_LENGTH);
563 3efd8e31 2022-10-23 thomas 		te->mode = pe->mode;
564 3efd8e31 2022-10-23 thomas 		te->idx = i;
565 3efd8e31 2022-10-23 thomas 	}
566 3efd8e31 2022-10-23 thomas done:
567 3efd8e31 2022-10-23 thomas 	free(path_packfile);
568 3efd8e31 2022-10-23 thomas 	free(entries);
569 3efd8e31 2022-10-23 thomas 	free(buf);
570 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
571 3efd8e31 2022-10-23 thomas 		(*tree)->refcnt++;
572 3efd8e31 2022-10-23 thomas 		err = got_repo_cache_tree(repo, id, *tree);
573 3efd8e31 2022-10-23 thomas 		if (err) {
574 3efd8e31 2022-10-23 thomas 			if (err->code == GOT_ERR_OBJ_EXISTS ||
575 3efd8e31 2022-10-23 thomas 			    err->code == GOT_ERR_OBJ_TOO_LARGE)
576 3efd8e31 2022-10-23 thomas 				err = NULL;
577 3efd8e31 2022-10-23 thomas 		}
578 3efd8e31 2022-10-23 thomas 	}
579 3efd8e31 2022-10-23 thomas 	if (err) {
580 3efd8e31 2022-10-23 thomas 		if (*tree)
581 3efd8e31 2022-10-23 thomas 			free((*tree)->entries);
582 3efd8e31 2022-10-23 thomas 		free(*tree);
583 3efd8e31 2022-10-23 thomas 		*tree = NULL;
584 3efd8e31 2022-10-23 thomas 	}
585 3efd8e31 2022-10-23 thomas 	return err;
586 3efd8e31 2022-10-23 thomas }
587 3efd8e31 2022-10-23 thomas 
588 3efd8e31 2022-10-23 thomas const struct got_error *
589 3efd8e31 2022-10-23 thomas got_object_open_as_tree(struct got_tree_object **tree,
590 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id)
591 3efd8e31 2022-10-23 thomas {
592 3efd8e31 2022-10-23 thomas 	*tree = got_repo_get_cached_tree(repo, id);
593 3efd8e31 2022-10-23 thomas 	if (*tree != NULL) {
594 3efd8e31 2022-10-23 thomas 		(*tree)->refcnt++;
595 3efd8e31 2022-10-23 thomas 		return NULL;
596 3efd8e31 2022-10-23 thomas 	}
597 3efd8e31 2022-10-23 thomas 
598 3efd8e31 2022-10-23 thomas 	return open_tree(tree, repo, id, 0);
599 3efd8e31 2022-10-23 thomas }
600 3efd8e31 2022-10-23 thomas 
601 3efd8e31 2022-10-23 thomas const struct got_error *
602 3efd8e31 2022-10-23 thomas got_object_tree_open(struct got_tree_object **tree,
603 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object *obj)
604 3efd8e31 2022-10-23 thomas {
605 3efd8e31 2022-10-23 thomas 	return open_tree(tree, repo, got_object_get_id(obj), 1);
606 3efd8e31 2022-10-23 thomas }
607 3efd8e31 2022-10-23 thomas 
608 3efd8e31 2022-10-23 thomas const struct got_error *
609 3efd8e31 2022-10-23 thomas got_object_open_as_blob(struct got_blob_object **blob,
610 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id, size_t blocksize,
611 3efd8e31 2022-10-23 thomas     int outfd)
612 3efd8e31 2022-10-23 thomas {
613 3efd8e31 2022-10-23 thomas 	return got_error(GOT_ERR_NOT_IMPL);
614 3efd8e31 2022-10-23 thomas }
615 3efd8e31 2022-10-23 thomas 
616 3efd8e31 2022-10-23 thomas const struct got_error *
617 3efd8e31 2022-10-23 thomas got_object_blob_open(struct got_blob_object **blob,
618 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object *obj, size_t blocksize,
619 3efd8e31 2022-10-23 thomas     int outfd)
620 3efd8e31 2022-10-23 thomas {
621 3efd8e31 2022-10-23 thomas 	return got_error(GOT_ERR_NOT_IMPL);
622 3efd8e31 2022-10-23 thomas }
623 3efd8e31 2022-10-23 thomas 
624 3efd8e31 2022-10-23 thomas static const struct got_error *
625 3efd8e31 2022-10-23 thomas open_tag(struct got_tag_object **tag, struct got_repository *repo,
626 3efd8e31 2022-10-23 thomas     struct got_object_id *id, int check_cache)
627 3efd8e31 2022-10-23 thomas {
628 3efd8e31 2022-10-23 thomas 	const struct got_error *err = NULL;
629 3efd8e31 2022-10-23 thomas 	struct got_packidx *packidx = NULL;
630 3efd8e31 2022-10-23 thomas 	int idx;
631 3efd8e31 2022-10-23 thomas 	char *path_packfile = NULL;
632 3efd8e31 2022-10-23 thomas 	struct got_object *obj = NULL;
633 3efd8e31 2022-10-23 thomas 	int obj_type = GOT_OBJ_TYPE_ANY;
634 3efd8e31 2022-10-23 thomas 
635 3efd8e31 2022-10-23 thomas 	if (check_cache) {
636 3efd8e31 2022-10-23 thomas 		*tag = got_repo_get_cached_tag(repo, id);
637 3efd8e31 2022-10-23 thomas 		if (*tag != NULL) {
638 3efd8e31 2022-10-23 thomas 			(*tag)->refcnt++;
639 3efd8e31 2022-10-23 thomas 			return NULL;
640 3efd8e31 2022-10-23 thomas 		}
641 3efd8e31 2022-10-23 thomas 	} else
642 3efd8e31 2022-10-23 thomas 		*tag = NULL;
643 3efd8e31 2022-10-23 thomas 
644 3efd8e31 2022-10-23 thomas 	err = got_repo_search_packidx(&packidx, &idx, repo, id);
645 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
646 3efd8e31 2022-10-23 thomas 		struct got_pack *pack = NULL;
647 3efd8e31 2022-10-23 thomas 		uint8_t *buf = NULL;
648 3efd8e31 2022-10-23 thomas 		size_t len;
649 3efd8e31 2022-10-23 thomas 
650 3efd8e31 2022-10-23 thomas 		err = got_packidx_get_packfile_path(&path_packfile,
651 3efd8e31 2022-10-23 thomas 		    packidx->path_packidx);
652 3efd8e31 2022-10-23 thomas 		if (err)
653 3efd8e31 2022-10-23 thomas 			return err;
654 3efd8e31 2022-10-23 thomas 
655 3efd8e31 2022-10-23 thomas 		pack = got_repo_get_cached_pack(repo, path_packfile);
656 3efd8e31 2022-10-23 thomas 		if (pack == NULL) {
657 3efd8e31 2022-10-23 thomas 			err = got_repo_cache_pack(&pack, repo, path_packfile,
658 3efd8e31 2022-10-23 thomas 			    packidx);
659 3efd8e31 2022-10-23 thomas 			if (err)
660 3efd8e31 2022-10-23 thomas 				goto done;
661 3efd8e31 2022-10-23 thomas 		}
662 3efd8e31 2022-10-23 thomas 
663 3efd8e31 2022-10-23 thomas 		/* Beware of "lightweight" tags: Check object type first. */
664 3efd8e31 2022-10-23 thomas 		err = got_packfile_open_object(&obj, pack, packidx, idx, id);
665 3efd8e31 2022-10-23 thomas 		if (err)
666 3efd8e31 2022-10-23 thomas 			goto done;
667 3efd8e31 2022-10-23 thomas 		obj_type = obj->type;
668 3efd8e31 2022-10-23 thomas 		if (obj_type != GOT_OBJ_TYPE_TAG) {
669 3efd8e31 2022-10-23 thomas 			err = got_error(GOT_ERR_OBJ_TYPE);
670 3efd8e31 2022-10-23 thomas 			got_object_close(obj);
671 3efd8e31 2022-10-23 thomas 			goto done;
672 3efd8e31 2022-10-23 thomas 		}
673 3efd8e31 2022-10-23 thomas 		err = got_packfile_extract_object_to_mem(&buf, &len,
674 3efd8e31 2022-10-23 thomas 		    obj, pack);
675 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
676 3efd8e31 2022-10-23 thomas 		if (err)
677 3efd8e31 2022-10-23 thomas 			goto done;
678 3efd8e31 2022-10-23 thomas 		err = got_object_parse_tag(tag, buf, len);
679 3efd8e31 2022-10-23 thomas 		free(buf);
680 3efd8e31 2022-10-23 thomas 	} else if (err->code == GOT_ERR_NO_OBJ) {
681 3efd8e31 2022-10-23 thomas 		int fd;
682 3efd8e31 2022-10-23 thomas 
683 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
684 3efd8e31 2022-10-23 thomas 		if (err)
685 3efd8e31 2022-10-23 thomas 			return err;
686 3efd8e31 2022-10-23 thomas 		err = got_object_read_header(&obj, fd);
687 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
688 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
689 3efd8e31 2022-10-23 thomas 		if (err)
690 3efd8e31 2022-10-23 thomas 			return err;
691 3efd8e31 2022-10-23 thomas 		obj_type = obj->type;
692 3efd8e31 2022-10-23 thomas 		got_object_close(obj);
693 3efd8e31 2022-10-23 thomas 		if (obj_type != GOT_OBJ_TYPE_TAG)
694 3efd8e31 2022-10-23 thomas 			return got_error(GOT_ERR_OBJ_TYPE);
695 3efd8e31 2022-10-23 thomas 
696 3efd8e31 2022-10-23 thomas 		err = got_object_open_loose_fd(&fd, id, repo);
697 3efd8e31 2022-10-23 thomas 		if (err)
698 3efd8e31 2022-10-23 thomas 			return err;
699 3efd8e31 2022-10-23 thomas 		err = got_object_read_tag(tag, fd, id, 0);
700 3efd8e31 2022-10-23 thomas 		if (close(fd) == -1 && err == NULL)
701 3efd8e31 2022-10-23 thomas 			err = got_error_from_errno("close");
702 3efd8e31 2022-10-23 thomas 		if (err)
703 3efd8e31 2022-10-23 thomas 			return err;
704 3efd8e31 2022-10-23 thomas 	}
705 3efd8e31 2022-10-23 thomas 
706 3efd8e31 2022-10-23 thomas 	if (err == NULL) {
707 3efd8e31 2022-10-23 thomas 		(*tag)->refcnt++;
708 3efd8e31 2022-10-23 thomas 		err = got_repo_cache_tag(repo, id, *tag);
709 3efd8e31 2022-10-23 thomas 		if (err) {
710 3efd8e31 2022-10-23 thomas 			if (err->code == GOT_ERR_OBJ_EXISTS ||
711 3efd8e31 2022-10-23 thomas 			    err->code == GOT_ERR_OBJ_TOO_LARGE)
712 3efd8e31 2022-10-23 thomas 				err = NULL;
713 3efd8e31 2022-10-23 thomas 		}
714 3efd8e31 2022-10-23 thomas 	}
715 3efd8e31 2022-10-23 thomas done:
716 3efd8e31 2022-10-23 thomas 	free(path_packfile);
717 3efd8e31 2022-10-23 thomas 	return err;
718 3efd8e31 2022-10-23 thomas }
719 3efd8e31 2022-10-23 thomas 
720 3efd8e31 2022-10-23 thomas const struct got_error *
721 3efd8e31 2022-10-23 thomas got_object_open_as_tag(struct got_tag_object **tag,
722 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object_id *id)
723 3efd8e31 2022-10-23 thomas {
724 3efd8e31 2022-10-23 thomas 	*tag = got_repo_get_cached_tag(repo, id);
725 3efd8e31 2022-10-23 thomas 	if (*tag != NULL) {
726 3efd8e31 2022-10-23 thomas 		(*tag)->refcnt++;
727 3efd8e31 2022-10-23 thomas 		return NULL;
728 3efd8e31 2022-10-23 thomas 	}
729 3efd8e31 2022-10-23 thomas 
730 3efd8e31 2022-10-23 thomas 	return open_tag(tag, repo, id, 0);
731 3efd8e31 2022-10-23 thomas }
732 3efd8e31 2022-10-23 thomas 
733 3efd8e31 2022-10-23 thomas const struct got_error *
734 3efd8e31 2022-10-23 thomas got_object_tag_open(struct got_tag_object **tag,
735 3efd8e31 2022-10-23 thomas     struct got_repository *repo, struct got_object *obj)
736 3efd8e31 2022-10-23 thomas {
737 3efd8e31 2022-10-23 thomas 	return open_tag(tag, repo, got_object_get_id(obj), 1);
738 3efd8e31 2022-10-23 thomas }