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 4027f31a 2017-11-04 stsp #include "got_refs.h"
 29 4027f31a 2017-11-04 stsp #include "got_repository.h"
 30 4027f31a 2017-11-04 stsp 
 31 32cb896c 2018-03-11 stsp #include "got_path_lib.h"
 32 32cb896c 2018-03-11 stsp #include "got_repository_lib.h"
 33 32cb896c 2018-03-11 stsp #include "got_zbuf_lib.h"
 34 32cb896c 2018-03-11 stsp #include "got_delta_lib.h"
 35 32cb896c 2018-03-11 stsp #include "got_object_lib.h"
 36 32cb896c 2018-03-11 stsp #include "got_pack_lib.h"
 37 c3f94f68 2017-11-05 stsp 
 38 79b11c62 2018-03-09 stsp #ifndef nitems
 39 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
 40 79b11c62 2018-03-09 stsp #endif
 41 3b339b2f 2018-02-12 stsp 
 42 4027f31a 2017-11-04 stsp #define GOT_GIT_DIR	".git"
 43 4027f31a 2017-11-04 stsp 
 44 4027f31a 2017-11-04 stsp /* Mandatory files and directories inside the git directory. */
 45 4df642d9 2017-11-05 stsp #define GOT_OBJECTS_DIR		"objects"
 46 4df642d9 2017-11-05 stsp #define GOT_REFS_DIR		"refs"
 47 4df642d9 2017-11-05 stsp #define GOT_HEAD_FILE		"HEAD"
 48 4027f31a 2017-11-04 stsp 
 49 a1fd68d8 2018-01-12 stsp /* Other files and directories inside the git directory. */
 50 4df642d9 2017-11-05 stsp #define GOT_FETCH_HEAD_FILE	"FETCH_HEAD"
 51 4df642d9 2017-11-05 stsp #define GOT_ORIG_HEAD_FILE	"ORIG_HEAD"
 52 a1fd68d8 2018-01-12 stsp #define GOT_OBJECTS_PACK_DIR	"objects/pack"
 53 4df642d9 2017-11-05 stsp 
 54 11995603 2017-11-05 stsp char *
 55 86c3caaf 2018-03-09 stsp got_repo_get_path(struct got_repository *repo)
 56 86c3caaf 2018-03-09 stsp {
 57 86c3caaf 2018-03-09 stsp 	return strdup(repo->path);
 58 86c3caaf 2018-03-09 stsp }
 59 86c3caaf 2018-03-09 stsp 
 60 86c3caaf 2018-03-09 stsp char *
 61 11995603 2017-11-05 stsp got_repo_get_path_git_dir(struct got_repository *repo)
 62 4027f31a 2017-11-04 stsp {
 63 4027f31a 2017-11-04 stsp 	char *path_git;
 64 4027f31a 2017-11-04 stsp 	
 65 4027f31a 2017-11-04 stsp 	if (asprintf(&path_git, "%s/%s", repo->path, GOT_GIT_DIR) == -1)
 66 4027f31a 2017-11-04 stsp 		return NULL;
 67 4027f31a 2017-11-04 stsp 
 68 4027f31a 2017-11-04 stsp 	return path_git;
 69 4027f31a 2017-11-04 stsp }
 70 4027f31a 2017-11-04 stsp 
 71 4027f31a 2017-11-04 stsp static char *
 72 4027f31a 2017-11-04 stsp get_path_git_child(struct got_repository *repo, const char *basename)
 73 4027f31a 2017-11-04 stsp {
 74 4027f31a 2017-11-04 stsp 	char *path_child;
 75 4027f31a 2017-11-04 stsp 	
 76 4027f31a 2017-11-04 stsp 	if (asprintf(&path_child, "%s/%s/%s", repo->path, GOT_GIT_DIR,
 77 4027f31a 2017-11-04 stsp 	    basename) == -1)
 78 4027f31a 2017-11-04 stsp 		return NULL;
 79 4027f31a 2017-11-04 stsp 
 80 4027f31a 2017-11-04 stsp 	return path_child;
 81 4027f31a 2017-11-04 stsp }
 82 4027f31a 2017-11-04 stsp 
 83 11995603 2017-11-05 stsp char *
 84 11995603 2017-11-05 stsp got_repo_get_path_objects(struct got_repository *repo)
 85 4027f31a 2017-11-04 stsp {
 86 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
 87 4027f31a 2017-11-04 stsp }
 88 4027f31a 2017-11-04 stsp 
 89 11995603 2017-11-05 stsp char *
 90 a1fd68d8 2018-01-12 stsp got_repo_get_path_objects_pack(struct got_repository *repo)
 91 a1fd68d8 2018-01-12 stsp {
 92 a1fd68d8 2018-01-12 stsp 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
 93 a1fd68d8 2018-01-12 stsp }
 94 a1fd68d8 2018-01-12 stsp 
 95 a1fd68d8 2018-01-12 stsp char *
 96 11995603 2017-11-05 stsp got_repo_get_path_refs(struct got_repository *repo)
 97 4027f31a 2017-11-04 stsp {
 98 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_REFS_DIR);
 99 4027f31a 2017-11-04 stsp }
100 4027f31a 2017-11-04 stsp 
101 4027f31a 2017-11-04 stsp static char *
102 4027f31a 2017-11-04 stsp get_path_head(struct got_repository *repo)
103 4027f31a 2017-11-04 stsp {
104 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_HEAD_FILE);
105 4027f31a 2017-11-04 stsp }
106 4027f31a 2017-11-04 stsp 
107 4027f31a 2017-11-04 stsp static int
108 4027f31a 2017-11-04 stsp is_git_repo(struct got_repository *repo)
109 4027f31a 2017-11-04 stsp {
110 11995603 2017-11-05 stsp 	char *path_git = got_repo_get_path_git_dir(repo);
111 11995603 2017-11-05 stsp 	char *path_objects = got_repo_get_path_objects(repo);
112 11995603 2017-11-05 stsp 	char *path_refs = got_repo_get_path_refs(repo);
113 4027f31a 2017-11-04 stsp 	char *path_head = get_path_head(repo);
114 deeca238 2018-03-12 stsp 	int ret = 0;
115 deeca238 2018-03-12 stsp 	struct stat sb;
116 4027f31a 2017-11-04 stsp 
117 deeca238 2018-03-12 stsp 	if (lstat(path_git, &sb) == -1)
118 deeca238 2018-03-12 stsp 		goto done;
119 deeca238 2018-03-12 stsp 	if (!S_ISDIR(sb.st_mode))
120 deeca238 2018-03-12 stsp 		goto done;
121 4027f31a 2017-11-04 stsp 
122 deeca238 2018-03-12 stsp 	if (lstat(path_objects, &sb) == -1)
123 deeca238 2018-03-12 stsp 		goto done;
124 deeca238 2018-03-12 stsp 	if (!S_ISDIR(sb.st_mode))
125 deeca238 2018-03-12 stsp 		goto done;
126 deeca238 2018-03-12 stsp 
127 deeca238 2018-03-12 stsp 	if (lstat(path_refs, &sb) == -1)
128 deeca238 2018-03-12 stsp 		goto done;
129 deeca238 2018-03-12 stsp 	if (!S_ISDIR(sb.st_mode))
130 deeca238 2018-03-12 stsp 		goto done;
131 deeca238 2018-03-12 stsp 
132 deeca238 2018-03-12 stsp 	if (lstat(path_head, &sb) == -1)
133 deeca238 2018-03-12 stsp 		goto done;
134 deeca238 2018-03-12 stsp 	if (!S_ISREG(sb.st_mode))
135 deeca238 2018-03-12 stsp 		goto done;
136 deeca238 2018-03-12 stsp 	ret = 1;
137 deeca238 2018-03-12 stsp done:
138 4027f31a 2017-11-04 stsp 	free(path_git);
139 4027f31a 2017-11-04 stsp 	free(path_objects);
140 4027f31a 2017-11-04 stsp 	free(path_refs);
141 4027f31a 2017-11-04 stsp 	free(path_head);
142 4027f31a 2017-11-04 stsp 	return ret;
143 4027f31a 2017-11-04 stsp 
144 4027f31a 2017-11-04 stsp }
145 4027f31a 2017-11-04 stsp 
146 4027f31a 2017-11-04 stsp const struct got_error *
147 92af5469 2017-11-05 stsp got_repo_open(struct got_repository **ret, const char *path)
148 4027f31a 2017-11-04 stsp {
149 92af5469 2017-11-05 stsp 	struct got_repository *repo = NULL;
150 92af5469 2017-11-05 stsp 	const struct got_error *err = NULL;
151 2393f13b 2018-03-09 stsp 	char *abspath;
152 4027f31a 2017-11-04 stsp 
153 2393f13b 2018-03-09 stsp 	if (got_path_is_absolute(path))
154 2393f13b 2018-03-09 stsp 		abspath = strdup(path);
155 2393f13b 2018-03-09 stsp 	else
156 2393f13b 2018-03-09 stsp 		abspath = got_path_get_absolute(path);
157 92af5469 2017-11-05 stsp 	if (abspath == NULL)
158 92af5469 2017-11-05 stsp 		return got_error(GOT_ERR_BAD_PATH);
159 4027f31a 2017-11-04 stsp 
160 4027f31a 2017-11-04 stsp 	repo = calloc(1, sizeof(*repo));
161 92af5469 2017-11-05 stsp 	if (repo == NULL) {
162 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_NO_MEM);
163 92af5469 2017-11-05 stsp 		goto done;
164 92af5469 2017-11-05 stsp 	}
165 4027f31a 2017-11-04 stsp 
166 4027f31a 2017-11-04 stsp 	repo->path = got_path_normalize(abspath);
167 92af5469 2017-11-05 stsp 	if (repo->path == NULL) {
168 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_BAD_PATH);
169 92af5469 2017-11-05 stsp 		goto done;
170 92af5469 2017-11-05 stsp 	}
171 4027f31a 2017-11-04 stsp 
172 92af5469 2017-11-05 stsp 	if (!is_git_repo(repo)) {
173 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_NOT_GIT_REPO);
174 92af5469 2017-11-05 stsp 		goto done;
175 92af5469 2017-11-05 stsp 	}
176 4027f31a 2017-11-04 stsp 		
177 4027f31a 2017-11-04 stsp 	*ret = repo;
178 92af5469 2017-11-05 stsp done:
179 92af5469 2017-11-05 stsp 	if (err)
180 92af5469 2017-11-05 stsp 		free(repo);
181 92af5469 2017-11-05 stsp 	free(abspath);
182 92af5469 2017-11-05 stsp 	return err;
183 4027f31a 2017-11-04 stsp }
184 4027f31a 2017-11-04 stsp 
185 4027f31a 2017-11-04 stsp void
186 4027f31a 2017-11-04 stsp got_repo_close(struct got_repository *repo)
187 4027f31a 2017-11-04 stsp {
188 79b11c62 2018-03-09 stsp 	int i;
189 79b11c62 2018-03-09 stsp 
190 79b11c62 2018-03-09 stsp 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
191 79b11c62 2018-03-09 stsp 		if (repo->packidx_cache[i] == NULL)
192 79b11c62 2018-03-09 stsp 			break;
193 79b11c62 2018-03-09 stsp 		got_packidx_close(repo->packidx_cache[i]);
194 79b11c62 2018-03-09 stsp 	}
195 4027f31a 2017-11-04 stsp 	free(repo->path);
196 4027f31a 2017-11-04 stsp 	free(repo);
197 4027f31a 2017-11-04 stsp }