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 79b11c62 2018-03-09 stsp 
 19 4027f31a 2017-11-04 stsp #include <limits.h>
 20 4027f31a 2017-11-04 stsp #include <stdlib.h>
 21 4027f31a 2017-11-04 stsp #include <stdio.h>
 22 4027f31a 2017-11-04 stsp #include <sha1.h>
 23 4027f31a 2017-11-04 stsp #include <string.h>
 24 79b11c62 2018-03-09 stsp #include <zlib.h>
 25 4027f31a 2017-11-04 stsp 
 26 4027f31a 2017-11-04 stsp #include "got_error.h"
 27 4027f31a 2017-11-04 stsp #include "got_refs.h"
 28 4027f31a 2017-11-04 stsp #include "got_repository.h"
 29 4027f31a 2017-11-04 stsp 
 30 32cb896c 2018-03-11 stsp #include "got_path_lib.h"
 31 32cb896c 2018-03-11 stsp #include "got_repository_lib.h"
 32 32cb896c 2018-03-11 stsp #include "got_zbuf_lib.h"
 33 32cb896c 2018-03-11 stsp #include "got_delta_lib.h"
 34 32cb896c 2018-03-11 stsp #include "got_object_lib.h"
 35 32cb896c 2018-03-11 stsp #include "got_pack_lib.h"
 36 c3f94f68 2017-11-05 stsp 
 37 79b11c62 2018-03-09 stsp #ifndef nitems
 38 79b11c62 2018-03-09 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
 39 79b11c62 2018-03-09 stsp #endif
 40 3b339b2f 2018-02-12 stsp 
 41 4027f31a 2017-11-04 stsp #define GOT_GIT_DIR	".git"
 42 4027f31a 2017-11-04 stsp 
 43 4027f31a 2017-11-04 stsp /* Mandatory files and directories inside the git directory. */
 44 4df642d9 2017-11-05 stsp #define GOT_OBJECTS_DIR		"objects"
 45 4df642d9 2017-11-05 stsp #define GOT_REFS_DIR		"refs"
 46 4df642d9 2017-11-05 stsp #define GOT_HEAD_FILE		"HEAD"
 47 4027f31a 2017-11-04 stsp 
 48 a1fd68d8 2018-01-12 stsp /* Other files and directories inside the git directory. */
 49 4df642d9 2017-11-05 stsp #define GOT_FETCH_HEAD_FILE	"FETCH_HEAD"
 50 4df642d9 2017-11-05 stsp #define GOT_ORIG_HEAD_FILE	"ORIG_HEAD"
 51 a1fd68d8 2018-01-12 stsp #define GOT_OBJECTS_PACK_DIR	"objects/pack"
 52 4df642d9 2017-11-05 stsp 
 53 11995603 2017-11-05 stsp char *
 54 86c3caaf 2018-03-09 stsp got_repo_get_path(struct got_repository *repo)
 55 86c3caaf 2018-03-09 stsp {
 56 86c3caaf 2018-03-09 stsp 	return strdup(repo->path);
 57 86c3caaf 2018-03-09 stsp }
 58 86c3caaf 2018-03-09 stsp 
 59 86c3caaf 2018-03-09 stsp char *
 60 11995603 2017-11-05 stsp got_repo_get_path_git_dir(struct got_repository *repo)
 61 4027f31a 2017-11-04 stsp {
 62 4027f31a 2017-11-04 stsp 	char *path_git;
 63 4027f31a 2017-11-04 stsp 	
 64 4027f31a 2017-11-04 stsp 	if (asprintf(&path_git, "%s/%s", repo->path, GOT_GIT_DIR) == -1)
 65 4027f31a 2017-11-04 stsp 		return NULL;
 66 4027f31a 2017-11-04 stsp 
 67 4027f31a 2017-11-04 stsp 	return path_git;
 68 4027f31a 2017-11-04 stsp }
 69 4027f31a 2017-11-04 stsp 
 70 4027f31a 2017-11-04 stsp static char *
 71 4027f31a 2017-11-04 stsp get_path_git_child(struct got_repository *repo, const char *basename)
 72 4027f31a 2017-11-04 stsp {
 73 4027f31a 2017-11-04 stsp 	char *path_child;
 74 4027f31a 2017-11-04 stsp 	
 75 4027f31a 2017-11-04 stsp 	if (asprintf(&path_child, "%s/%s/%s", repo->path, GOT_GIT_DIR,
 76 4027f31a 2017-11-04 stsp 	    basename) == -1)
 77 4027f31a 2017-11-04 stsp 		return NULL;
 78 4027f31a 2017-11-04 stsp 
 79 4027f31a 2017-11-04 stsp 	return path_child;
 80 4027f31a 2017-11-04 stsp }
 81 4027f31a 2017-11-04 stsp 
 82 11995603 2017-11-05 stsp char *
 83 11995603 2017-11-05 stsp got_repo_get_path_objects(struct got_repository *repo)
 84 4027f31a 2017-11-04 stsp {
 85 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
 86 4027f31a 2017-11-04 stsp }
 87 4027f31a 2017-11-04 stsp 
 88 11995603 2017-11-05 stsp char *
 89 a1fd68d8 2018-01-12 stsp got_repo_get_path_objects_pack(struct got_repository *repo)
 90 a1fd68d8 2018-01-12 stsp {
 91 a1fd68d8 2018-01-12 stsp 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
 92 a1fd68d8 2018-01-12 stsp }
 93 a1fd68d8 2018-01-12 stsp 
 94 a1fd68d8 2018-01-12 stsp char *
 95 11995603 2017-11-05 stsp got_repo_get_path_refs(struct got_repository *repo)
 96 4027f31a 2017-11-04 stsp {
 97 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_REFS_DIR);
 98 4027f31a 2017-11-04 stsp }
 99 4027f31a 2017-11-04 stsp 
100 4027f31a 2017-11-04 stsp static char *
101 4027f31a 2017-11-04 stsp get_path_head(struct got_repository *repo)
102 4027f31a 2017-11-04 stsp {
103 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_HEAD_FILE);
104 4027f31a 2017-11-04 stsp }
105 4027f31a 2017-11-04 stsp 
106 4027f31a 2017-11-04 stsp static int
107 4027f31a 2017-11-04 stsp is_git_repo(struct got_repository *repo)
108 4027f31a 2017-11-04 stsp {
109 11995603 2017-11-05 stsp 	char *path_git = got_repo_get_path_git_dir(repo);
110 11995603 2017-11-05 stsp 	char *path_objects = got_repo_get_path_objects(repo);
111 11995603 2017-11-05 stsp 	char *path_refs = got_repo_get_path_refs(repo);
112 4027f31a 2017-11-04 stsp 	char *path_head = get_path_head(repo);
113 4027f31a 2017-11-04 stsp 	int ret;
114 4027f31a 2017-11-04 stsp 
115 4027f31a 2017-11-04 stsp 	ret = (path_git != NULL) && (path_objects != NULL) &&
116 4027f31a 2017-11-04 stsp 	    (path_refs != NULL) && (path_head != NULL);
117 4027f31a 2017-11-04 stsp 
118 4027f31a 2017-11-04 stsp 	free(path_git);
119 4027f31a 2017-11-04 stsp 	free(path_objects);
120 4027f31a 2017-11-04 stsp 	free(path_refs);
121 4027f31a 2017-11-04 stsp 	free(path_head);
122 4027f31a 2017-11-04 stsp 	return ret;
123 4027f31a 2017-11-04 stsp 
124 4027f31a 2017-11-04 stsp }
125 4027f31a 2017-11-04 stsp 
126 4027f31a 2017-11-04 stsp const struct got_error *
127 92af5469 2017-11-05 stsp got_repo_open(struct got_repository **ret, const char *path)
128 4027f31a 2017-11-04 stsp {
129 92af5469 2017-11-05 stsp 	struct got_repository *repo = NULL;
130 92af5469 2017-11-05 stsp 	const struct got_error *err = NULL;
131 2393f13b 2018-03-09 stsp 	char *abspath;
132 4027f31a 2017-11-04 stsp 
133 2393f13b 2018-03-09 stsp 	if (got_path_is_absolute(path))
134 2393f13b 2018-03-09 stsp 		abspath = strdup(path);
135 2393f13b 2018-03-09 stsp 	else
136 2393f13b 2018-03-09 stsp 		abspath = got_path_get_absolute(path);
137 92af5469 2017-11-05 stsp 	if (abspath == NULL)
138 92af5469 2017-11-05 stsp 		return got_error(GOT_ERR_BAD_PATH);
139 4027f31a 2017-11-04 stsp 
140 4027f31a 2017-11-04 stsp 	repo = calloc(1, sizeof(*repo));
141 92af5469 2017-11-05 stsp 	if (repo == NULL) {
142 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_NO_MEM);
143 92af5469 2017-11-05 stsp 		goto done;
144 92af5469 2017-11-05 stsp 	}
145 4027f31a 2017-11-04 stsp 
146 4027f31a 2017-11-04 stsp 	repo->path = got_path_normalize(abspath);
147 92af5469 2017-11-05 stsp 	if (repo->path == NULL) {
148 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_BAD_PATH);
149 92af5469 2017-11-05 stsp 		goto done;
150 92af5469 2017-11-05 stsp 	}
151 4027f31a 2017-11-04 stsp 
152 92af5469 2017-11-05 stsp 	if (!is_git_repo(repo)) {
153 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_NOT_GIT_REPO);
154 92af5469 2017-11-05 stsp 		goto done;
155 92af5469 2017-11-05 stsp 	}
156 4027f31a 2017-11-04 stsp 		
157 4027f31a 2017-11-04 stsp 	*ret = repo;
158 92af5469 2017-11-05 stsp done:
159 92af5469 2017-11-05 stsp 	if (err)
160 92af5469 2017-11-05 stsp 		free(repo);
161 92af5469 2017-11-05 stsp 	free(abspath);
162 92af5469 2017-11-05 stsp 	return err;
163 4027f31a 2017-11-04 stsp }
164 4027f31a 2017-11-04 stsp 
165 4027f31a 2017-11-04 stsp void
166 4027f31a 2017-11-04 stsp got_repo_close(struct got_repository *repo)
167 4027f31a 2017-11-04 stsp {
168 79b11c62 2018-03-09 stsp 	int i;
169 79b11c62 2018-03-09 stsp 
170 79b11c62 2018-03-09 stsp 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
171 79b11c62 2018-03-09 stsp 		if (repo->packidx_cache[i] == NULL)
172 79b11c62 2018-03-09 stsp 			break;
173 79b11c62 2018-03-09 stsp 		got_packidx_close(repo->packidx_cache[i]);
174 79b11c62 2018-03-09 stsp 	}
175 4027f31a 2017-11-04 stsp 	free(repo->path);
176 4027f31a 2017-11-04 stsp 	free(repo);
177 4027f31a 2017-11-04 stsp }