1 7b19e0f1 2017-11-05 stsp /*
  2 3b339b2f 2018-02-12 stsp  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
  3 7b19e0f1 2017-11-05 stsp  *
  4 7b19e0f1 2017-11-05 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 7b19e0f1 2017-11-05 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 7b19e0f1 2017-11-05 stsp  * copyright notice and this permission notice appear in all copies.
  7 7b19e0f1 2017-11-05 stsp  *
  8 7b19e0f1 2017-11-05 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 7b19e0f1 2017-11-05 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 7b19e0f1 2017-11-05 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 7b19e0f1 2017-11-05 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 7b19e0f1 2017-11-05 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 7b19e0f1 2017-11-05 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 7b19e0f1 2017-11-05 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 7b19e0f1 2017-11-05 stsp  */
 16 7b19e0f1 2017-11-05 stsp 
 17 79b11c62 2018-03-09 stsp #include <sys/queue.h>
 18 deeca238 2018-03-12 stsp #include <sys/stat.h>
 19 79b11c62 2018-03-09 stsp 
 20 4027f31a 2017-11-04 stsp #include <limits.h>
 21 4027f31a 2017-11-04 stsp #include <stdlib.h>
 22 4027f31a 2017-11-04 stsp #include <stdio.h>
 23 4027f31a 2017-11-04 stsp #include <sha1.h>
 24 4027f31a 2017-11-04 stsp #include <string.h>
 25 79b11c62 2018-03-09 stsp #include <zlib.h>
 26 4027f31a 2017-11-04 stsp 
 27 4027f31a 2017-11-04 stsp #include "got_error.h"
 28 5261c201 2018-04-01 stsp #include "got_reference.h"
 29 4027f31a 2017-11-04 stsp #include "got_repository.h"
 30 442a3ddc 2018-04-23 stsp #include "got_worktree.h"
 31 7bb0daa1 2018-06-21 stsp #include "got_object.h"
 32 4027f31a 2017-11-04 stsp 
 33 718b3ab0 2018-03-17 stsp #include "got_lib_path.h"
 34 718b3ab0 2018-03-17 stsp #include "got_lib_delta.h"
 35 718b3ab0 2018-03-17 stsp #include "got_lib_zbuf.h"
 36 718b3ab0 2018-03-17 stsp #include "got_lib_object.h"
 37 718b3ab0 2018-03-17 stsp #include "got_lib_pack.h"
 38 718b3ab0 2018-03-17 stsp #include "got_lib_repository.h"
 39 442a3ddc 2018-04-23 stsp #include "got_lib_worktree.h"
 40 c3f94f68 2017-11-05 stsp 
 41 79b11c62 2018-03-09 stsp #ifndef nitems
 42 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
 43 79b11c62 2018-03-09 stsp #endif
 44 3b339b2f 2018-02-12 stsp 
 45 4027f31a 2017-11-04 stsp #define GOT_GIT_DIR	".git"
 46 4027f31a 2017-11-04 stsp 
 47 4027f31a 2017-11-04 stsp /* Mandatory files and directories inside the git directory. */
 48 4df642d9 2017-11-05 stsp #define GOT_OBJECTS_DIR		"objects"
 49 4df642d9 2017-11-05 stsp #define GOT_REFS_DIR		"refs"
 50 4df642d9 2017-11-05 stsp #define GOT_HEAD_FILE		"HEAD"
 51 4027f31a 2017-11-04 stsp 
 52 a1fd68d8 2018-01-12 stsp /* Other files and directories inside the git directory. */
 53 4df642d9 2017-11-05 stsp #define GOT_FETCH_HEAD_FILE	"FETCH_HEAD"
 54 4df642d9 2017-11-05 stsp #define GOT_ORIG_HEAD_FILE	"ORIG_HEAD"
 55 a1fd68d8 2018-01-12 stsp #define GOT_OBJECTS_PACK_DIR	"objects/pack"
 56 4df642d9 2017-11-05 stsp 
 57 11995603 2017-11-05 stsp char *
 58 86c3caaf 2018-03-09 stsp got_repo_get_path(struct got_repository *repo)
 59 86c3caaf 2018-03-09 stsp {
 60 86c3caaf 2018-03-09 stsp 	return strdup(repo->path);
 61 86c3caaf 2018-03-09 stsp }
 62 86c3caaf 2018-03-09 stsp 
 63 86c3caaf 2018-03-09 stsp char *
 64 11995603 2017-11-05 stsp got_repo_get_path_git_dir(struct got_repository *repo)
 65 4027f31a 2017-11-04 stsp {
 66 4986b9d5 2018-03-12 stsp 	return strdup(repo->path_git_dir);
 67 4027f31a 2017-11-04 stsp }
 68 4027f31a 2017-11-04 stsp 
 69 4027f31a 2017-11-04 stsp static char *
 70 4027f31a 2017-11-04 stsp get_path_git_child(struct got_repository *repo, const char *basename)
 71 4027f31a 2017-11-04 stsp {
 72 4027f31a 2017-11-04 stsp 	char *path_child;
 73 4027f31a 2017-11-04 stsp 	
 74 4986b9d5 2018-03-12 stsp 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
 75 4027f31a 2017-11-04 stsp 	    basename) == -1)
 76 4027f31a 2017-11-04 stsp 		return NULL;
 77 4027f31a 2017-11-04 stsp 
 78 4027f31a 2017-11-04 stsp 	return path_child;
 79 4027f31a 2017-11-04 stsp }
 80 4027f31a 2017-11-04 stsp 
 81 11995603 2017-11-05 stsp char *
 82 11995603 2017-11-05 stsp got_repo_get_path_objects(struct got_repository *repo)
 83 4027f31a 2017-11-04 stsp {
 84 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
 85 4027f31a 2017-11-04 stsp }
 86 4027f31a 2017-11-04 stsp 
 87 11995603 2017-11-05 stsp char *
 88 a1fd68d8 2018-01-12 stsp got_repo_get_path_objects_pack(struct got_repository *repo)
 89 a1fd68d8 2018-01-12 stsp {
 90 a1fd68d8 2018-01-12 stsp 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
 91 a1fd68d8 2018-01-12 stsp }
 92 a1fd68d8 2018-01-12 stsp 
 93 a1fd68d8 2018-01-12 stsp char *
 94 11995603 2017-11-05 stsp got_repo_get_path_refs(struct got_repository *repo)
 95 4027f31a 2017-11-04 stsp {
 96 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_REFS_DIR);
 97 4027f31a 2017-11-04 stsp }
 98 4027f31a 2017-11-04 stsp 
 99 4027f31a 2017-11-04 stsp static char *
100 4027f31a 2017-11-04 stsp get_path_head(struct got_repository *repo)
101 4027f31a 2017-11-04 stsp {
102 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_HEAD_FILE);
103 4027f31a 2017-11-04 stsp }
104 4027f31a 2017-11-04 stsp 
105 4027f31a 2017-11-04 stsp static int
106 4027f31a 2017-11-04 stsp is_git_repo(struct got_repository *repo)
107 4027f31a 2017-11-04 stsp {
108 11995603 2017-11-05 stsp 	char *path_git = got_repo_get_path_git_dir(repo);
109 11995603 2017-11-05 stsp 	char *path_objects = got_repo_get_path_objects(repo);
110 11995603 2017-11-05 stsp 	char *path_refs = got_repo_get_path_refs(repo);
111 4027f31a 2017-11-04 stsp 	char *path_head = get_path_head(repo);
112 deeca238 2018-03-12 stsp 	int ret = 0;
113 deeca238 2018-03-12 stsp 	struct stat sb;
114 4847cca1 2018-03-12 stsp 	struct got_reference *head_ref;
115 4027f31a 2017-11-04 stsp 
116 deeca238 2018-03-12 stsp 	if (lstat(path_git, &sb) == -1)
117 deeca238 2018-03-12 stsp 		goto done;
118 deeca238 2018-03-12 stsp 	if (!S_ISDIR(sb.st_mode))
119 deeca238 2018-03-12 stsp 		goto done;
120 4027f31a 2017-11-04 stsp 
121 deeca238 2018-03-12 stsp 	if (lstat(path_objects, &sb) == -1)
122 deeca238 2018-03-12 stsp 		goto done;
123 deeca238 2018-03-12 stsp 	if (!S_ISDIR(sb.st_mode))
124 deeca238 2018-03-12 stsp 		goto done;
125 deeca238 2018-03-12 stsp 
126 deeca238 2018-03-12 stsp 	if (lstat(path_refs, &sb) == -1)
127 deeca238 2018-03-12 stsp 		goto done;
128 deeca238 2018-03-12 stsp 	if (!S_ISDIR(sb.st_mode))
129 deeca238 2018-03-12 stsp 		goto done;
130 deeca238 2018-03-12 stsp 
131 deeca238 2018-03-12 stsp 	if (lstat(path_head, &sb) == -1)
132 deeca238 2018-03-12 stsp 		goto done;
133 deeca238 2018-03-12 stsp 	if (!S_ISREG(sb.st_mode))
134 deeca238 2018-03-12 stsp 		goto done;
135 4847cca1 2018-03-12 stsp 
136 4847cca1 2018-03-12 stsp 	/* Check if the HEAD reference can be opened. */
137 4847cca1 2018-03-12 stsp 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD) != NULL)
138 4847cca1 2018-03-12 stsp 		goto done;
139 4847cca1 2018-03-12 stsp 	got_ref_close(head_ref);
140 4847cca1 2018-03-12 stsp 
141 deeca238 2018-03-12 stsp 	ret = 1;
142 deeca238 2018-03-12 stsp done:
143 4027f31a 2017-11-04 stsp 	free(path_git);
144 4027f31a 2017-11-04 stsp 	free(path_objects);
145 4027f31a 2017-11-04 stsp 	free(path_refs);
146 4027f31a 2017-11-04 stsp 	free(path_head);
147 4027f31a 2017-11-04 stsp 	return ret;
148 4027f31a 2017-11-04 stsp 
149 4027f31a 2017-11-04 stsp }
150 4027f31a 2017-11-04 stsp 
151 7bb0daa1 2018-06-21 stsp const struct got_error*
152 7bb0daa1 2018-06-21 stsp got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
153 7bb0daa1 2018-06-21 stsp     struct got_object *obj)
154 7bb0daa1 2018-06-21 stsp {
155 7bb0daa1 2018-06-21 stsp 	struct got_objcache_entry *ce;
156 7bb0daa1 2018-06-21 stsp 
157 7bb0daa1 2018-06-21 stsp 	if (repo->ncached >= GOT_OBJECT_CACHE_SIZE) {
158 7bb0daa1 2018-06-21 stsp 		ce = SIMPLEQ_FIRST(&repo->objcache);
159 7bb0daa1 2018-06-21 stsp 		SIMPLEQ_REMOVE_HEAD(&repo->objcache, entry);
160 7bb0daa1 2018-06-21 stsp 		got_object_close(ce->obj);
161 7bb0daa1 2018-06-21 stsp 		free(ce);
162 7bb0daa1 2018-06-21 stsp 		repo->ncached--;
163 7bb0daa1 2018-06-21 stsp 	}
164 7bb0daa1 2018-06-21 stsp 
165 7bb0daa1 2018-06-21 stsp 	ce = calloc(1, sizeof(*ce));
166 7bb0daa1 2018-06-21 stsp 	if (ce == NULL)
167 7bb0daa1 2018-06-21 stsp 		return got_error_from_errno();
168 7bb0daa1 2018-06-21 stsp 	memcpy(&ce->id, id, sizeof(ce->id));
169 7bb0daa1 2018-06-21 stsp 	ce->obj = obj;
170 7bb0daa1 2018-06-21 stsp 	obj->refcnt++;
171 7bb0daa1 2018-06-21 stsp 	SIMPLEQ_INSERT_HEAD(&repo->objcache, ce, entry);
172 7bb0daa1 2018-06-21 stsp 	repo->ncached++;
173 7bb0daa1 2018-06-21 stsp 	return NULL;
174 7bb0daa1 2018-06-21 stsp }
175 7bb0daa1 2018-06-21 stsp 
176 7bb0daa1 2018-06-21 stsp struct got_object *
177 7bb0daa1 2018-06-21 stsp got_repo_get_cached_object(struct got_repository *repo,
178 7bb0daa1 2018-06-21 stsp     struct got_object_id *id)
179 7bb0daa1 2018-06-21 stsp {
180 7bb0daa1 2018-06-21 stsp 	struct got_objcache_entry *ce;
181 7bb0daa1 2018-06-21 stsp 
182 7bb0daa1 2018-06-21 stsp 	SIMPLEQ_FOREACH(ce, &repo->objcache, entry) {
183 7bb0daa1 2018-06-21 stsp 		if (got_object_id_cmp(&ce->id, id) != 0)
184 7bb0daa1 2018-06-21 stsp 			continue;
185 7bb0daa1 2018-06-21 stsp 		repo->cache_hit++;
186 7bb0daa1 2018-06-21 stsp 		return ce->obj;
187 7bb0daa1 2018-06-21 stsp 	}
188 7bb0daa1 2018-06-21 stsp 	repo->cache_miss++;
189 7bb0daa1 2018-06-21 stsp 	return NULL;
190 7bb0daa1 2018-06-21 stsp }
191 7bb0daa1 2018-06-21 stsp 
192 4027f31a 2017-11-04 stsp const struct got_error *
193 92af5469 2017-11-05 stsp got_repo_open(struct got_repository **ret, const char *path)
194 4027f31a 2017-11-04 stsp {
195 92af5469 2017-11-05 stsp 	struct got_repository *repo = NULL;
196 92af5469 2017-11-05 stsp 	const struct got_error *err = NULL;
197 2393f13b 2018-03-09 stsp 	char *abspath;
198 4027f31a 2017-11-04 stsp 
199 2393f13b 2018-03-09 stsp 	if (got_path_is_absolute(path))
200 2393f13b 2018-03-09 stsp 		abspath = strdup(path);
201 2393f13b 2018-03-09 stsp 	else
202 2393f13b 2018-03-09 stsp 		abspath = got_path_get_absolute(path);
203 92af5469 2017-11-05 stsp 	if (abspath == NULL)
204 92af5469 2017-11-05 stsp 		return got_error(GOT_ERR_BAD_PATH);
205 4027f31a 2017-11-04 stsp 
206 4027f31a 2017-11-04 stsp 	repo = calloc(1, sizeof(*repo));
207 92af5469 2017-11-05 stsp 	if (repo == NULL) {
208 0a585a0d 2018-03-17 stsp 		err = got_error_from_errno();
209 92af5469 2017-11-05 stsp 		goto done;
210 92af5469 2017-11-05 stsp 	}
211 4027f31a 2017-11-04 stsp 
212 4027f31a 2017-11-04 stsp 	repo->path = got_path_normalize(abspath);
213 92af5469 2017-11-05 stsp 	if (repo->path == NULL) {
214 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_BAD_PATH);
215 92af5469 2017-11-05 stsp 		goto done;
216 92af5469 2017-11-05 stsp 	}
217 4027f31a 2017-11-04 stsp 
218 4986b9d5 2018-03-12 stsp 	repo->path_git_dir = strdup(repo->path);
219 4986b9d5 2018-03-12 stsp 	if (repo->path_git_dir == NULL) {
220 0a585a0d 2018-03-17 stsp 		err = got_error_from_errno();
221 92af5469 2017-11-05 stsp 		goto done;
222 92af5469 2017-11-05 stsp 	}
223 4986b9d5 2018-03-12 stsp 	if (!is_git_repo(repo)) {
224 4986b9d5 2018-03-12 stsp 		free(repo->path_git_dir);
225 4986b9d5 2018-03-12 stsp 		if (asprintf(&repo->path_git_dir, "%s/%s", repo->path,
226 4986b9d5 2018-03-12 stsp 		    GOT_GIT_DIR) == -1) {
227 0a585a0d 2018-03-17 stsp 			err = got_error_from_errno();
228 4986b9d5 2018-03-12 stsp 			goto done;
229 4986b9d5 2018-03-12 stsp 		}
230 4986b9d5 2018-03-12 stsp 		if (!is_git_repo(repo)) {
231 442a3ddc 2018-04-23 stsp 			struct got_worktree *worktree;
232 442a3ddc 2018-04-23 stsp 			if (got_worktree_open(&worktree, repo->path) == NULL) {
233 442a3ddc 2018-04-23 stsp 				free(repo->path_git_dir);
234 442a3ddc 2018-04-23 stsp 				repo->path_git_dir =
235 442a3ddc 2018-04-23 stsp 				    strdup(worktree->repo_path);
236 442a3ddc 2018-04-23 stsp 				if (repo->path_git_dir == NULL) {
237 442a3ddc 2018-04-23 stsp 					err = got_error_from_errno();
238 442a3ddc 2018-04-23 stsp 					goto done;
239 442a3ddc 2018-04-23 stsp 				}
240 442a3ddc 2018-04-23 stsp 				if (!is_git_repo(repo)) {
241 442a3ddc 2018-04-23 stsp 					free(repo->path_git_dir);
242 442a3ddc 2018-04-23 stsp 					if (asprintf(&repo->path_git_dir,
243 442a3ddc 2018-04-23 stsp 					    "%s/%s", worktree->repo_path,
244 442a3ddc 2018-04-23 stsp 					    GOT_GIT_DIR) == -1) {
245 442a3ddc 2018-04-23 stsp 						err = got_error_from_errno();
246 442a3ddc 2018-04-23 stsp 						goto done;
247 442a3ddc 2018-04-23 stsp 					}
248 442a3ddc 2018-04-23 stsp 				}
249 442a3ddc 2018-04-23 stsp 				got_worktree_close(worktree);
250 442a3ddc 2018-04-23 stsp 			}
251 442a3ddc 2018-04-23 stsp 		}
252 442a3ddc 2018-04-23 stsp 		if (!is_git_repo(repo)) {
253 4986b9d5 2018-03-12 stsp 			err = got_error(GOT_ERR_NOT_GIT_REPO);
254 4986b9d5 2018-03-12 stsp 			goto done;
255 4986b9d5 2018-03-12 stsp 		}
256 4986b9d5 2018-03-12 stsp 	}
257 4027f31a 2017-11-04 stsp 		
258 4027f31a 2017-11-04 stsp 	*ret = repo;
259 92af5469 2017-11-05 stsp done:
260 92af5469 2017-11-05 stsp 	if (err)
261 4986b9d5 2018-03-12 stsp 		got_repo_close(repo);
262 92af5469 2017-11-05 stsp 	free(abspath);
263 92af5469 2017-11-05 stsp 	return err;
264 4027f31a 2017-11-04 stsp }
265 4027f31a 2017-11-04 stsp 
266 4027f31a 2017-11-04 stsp void
267 4027f31a 2017-11-04 stsp got_repo_close(struct got_repository *repo)
268 4027f31a 2017-11-04 stsp {
269 79b11c62 2018-03-09 stsp 	int i;
270 79b11c62 2018-03-09 stsp 
271 65cf1e80 2018-03-16 stsp 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
272 65cf1e80 2018-03-16 stsp 		if (repo->packidx_cache[i] == NULL)
273 79b11c62 2018-03-09 stsp 			break;
274 65cf1e80 2018-03-16 stsp 		got_packidx_close(repo->packidx_cache[i]);
275 79b11c62 2018-03-09 stsp 	}
276 bd1223b9 2018-03-14 stsp 
277 7e656b93 2018-03-17 stsp 	for (i = 0; i < nitems(repo->packs); i++) {
278 7e656b93 2018-03-17 stsp 		if (repo->packs[i].path_packfile == NULL)
279 7e656b93 2018-03-17 stsp 			break;
280 7e656b93 2018-03-17 stsp 		got_pack_close(&repo->packs[i]);
281 7e656b93 2018-03-17 stsp 	}
282 7e656b93 2018-03-17 stsp 
283 7bb0daa1 2018-06-21 stsp 	while (!SIMPLEQ_EMPTY(&repo->objcache)) {
284 7bb0daa1 2018-06-21 stsp 		struct got_objcache_entry *ce;
285 7bb0daa1 2018-06-21 stsp 		ce = SIMPLEQ_FIRST(&repo->objcache);
286 7bb0daa1 2018-06-21 stsp 		SIMPLEQ_REMOVE_HEAD(&repo->objcache, entry);
287 7bb0daa1 2018-06-21 stsp 		got_object_close(ce->obj);
288 7bb0daa1 2018-06-21 stsp 		free(ce);
289 7bb0daa1 2018-06-21 stsp 	}
290 7bb0daa1 2018-06-21 stsp 
291 4027f31a 2017-11-04 stsp 	free(repo->path);
292 4986b9d5 2018-03-12 stsp 	free(repo->path_git_dir);
293 4027f31a 2017-11-04 stsp 	free(repo);
294 4027f31a 2017-11-04 stsp }