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 4027f31a 2017-11-04 stsp #include <limits.h>
 18 4027f31a 2017-11-04 stsp #include <stdlib.h>
 19 4027f31a 2017-11-04 stsp #include <stdio.h>
 20 4027f31a 2017-11-04 stsp #include <sha1.h>
 21 4027f31a 2017-11-04 stsp #include <string.h>
 22 4027f31a 2017-11-04 stsp 
 23 4027f31a 2017-11-04 stsp #include "got_error.h"
 24 4027f31a 2017-11-04 stsp #include "got_refs.h"
 25 4027f31a 2017-11-04 stsp #include "got_repository.h"
 26 4027f31a 2017-11-04 stsp 
 27 1411938b 2018-02-12 stsp #include "got_path_priv.h"
 28 c3f94f68 2017-11-05 stsp 
 29 3b339b2f 2018-02-12 stsp struct got_repository {
 30 3b339b2f 2018-02-12 stsp 	char *path;
 31 3b339b2f 2018-02-12 stsp };
 32 3b339b2f 2018-02-12 stsp 
 33 4027f31a 2017-11-04 stsp #define GOT_GIT_DIR	".git"
 34 4027f31a 2017-11-04 stsp 
 35 4027f31a 2017-11-04 stsp /* Mandatory files and directories inside the git directory. */
 36 4df642d9 2017-11-05 stsp #define GOT_OBJECTS_DIR		"objects"
 37 4df642d9 2017-11-05 stsp #define GOT_REFS_DIR		"refs"
 38 4df642d9 2017-11-05 stsp #define GOT_HEAD_FILE		"HEAD"
 39 4027f31a 2017-11-04 stsp 
 40 a1fd68d8 2018-01-12 stsp /* Other files and directories inside the git directory. */
 41 4df642d9 2017-11-05 stsp #define GOT_FETCH_HEAD_FILE	"FETCH_HEAD"
 42 4df642d9 2017-11-05 stsp #define GOT_ORIG_HEAD_FILE	"ORIG_HEAD"
 43 a1fd68d8 2018-01-12 stsp #define GOT_OBJECTS_PACK_DIR	"objects/pack"
 44 4df642d9 2017-11-05 stsp 
 45 11995603 2017-11-05 stsp char *
 46 11995603 2017-11-05 stsp got_repo_get_path_git_dir(struct got_repository *repo)
 47 4027f31a 2017-11-04 stsp {
 48 4027f31a 2017-11-04 stsp 	char *path_git;
 49 4027f31a 2017-11-04 stsp 	
 50 4027f31a 2017-11-04 stsp 	if (asprintf(&path_git, "%s/%s", repo->path, GOT_GIT_DIR) == -1)
 51 4027f31a 2017-11-04 stsp 		return NULL;
 52 4027f31a 2017-11-04 stsp 
 53 4027f31a 2017-11-04 stsp 	return path_git;
 54 4027f31a 2017-11-04 stsp }
 55 4027f31a 2017-11-04 stsp 
 56 4027f31a 2017-11-04 stsp static char *
 57 4027f31a 2017-11-04 stsp get_path_git_child(struct got_repository *repo, const char *basename)
 58 4027f31a 2017-11-04 stsp {
 59 4027f31a 2017-11-04 stsp 	char *path_child;
 60 4027f31a 2017-11-04 stsp 	
 61 4027f31a 2017-11-04 stsp 	if (asprintf(&path_child, "%s/%s/%s", repo->path, GOT_GIT_DIR,
 62 4027f31a 2017-11-04 stsp 	    basename) == -1)
 63 4027f31a 2017-11-04 stsp 		return NULL;
 64 4027f31a 2017-11-04 stsp 
 65 4027f31a 2017-11-04 stsp 	return path_child;
 66 4027f31a 2017-11-04 stsp }
 67 4027f31a 2017-11-04 stsp 
 68 11995603 2017-11-05 stsp char *
 69 11995603 2017-11-05 stsp got_repo_get_path_objects(struct got_repository *repo)
 70 4027f31a 2017-11-04 stsp {
 71 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
 72 4027f31a 2017-11-04 stsp }
 73 4027f31a 2017-11-04 stsp 
 74 11995603 2017-11-05 stsp char *
 75 a1fd68d8 2018-01-12 stsp got_repo_get_path_objects_pack(struct got_repository *repo)
 76 a1fd68d8 2018-01-12 stsp {
 77 a1fd68d8 2018-01-12 stsp 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
 78 a1fd68d8 2018-01-12 stsp }
 79 a1fd68d8 2018-01-12 stsp 
 80 a1fd68d8 2018-01-12 stsp char *
 81 11995603 2017-11-05 stsp got_repo_get_path_refs(struct got_repository *repo)
 82 4027f31a 2017-11-04 stsp {
 83 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_REFS_DIR);
 84 4027f31a 2017-11-04 stsp }
 85 4027f31a 2017-11-04 stsp 
 86 4027f31a 2017-11-04 stsp static char *
 87 4027f31a 2017-11-04 stsp get_path_head(struct got_repository *repo)
 88 4027f31a 2017-11-04 stsp {
 89 4027f31a 2017-11-04 stsp 	return get_path_git_child(repo, GOT_HEAD_FILE);
 90 4027f31a 2017-11-04 stsp }
 91 4027f31a 2017-11-04 stsp 
 92 4027f31a 2017-11-04 stsp static int
 93 4027f31a 2017-11-04 stsp is_git_repo(struct got_repository *repo)
 94 4027f31a 2017-11-04 stsp {
 95 11995603 2017-11-05 stsp 	char *path_git = got_repo_get_path_git_dir(repo);
 96 11995603 2017-11-05 stsp 	char *path_objects = got_repo_get_path_objects(repo);
 97 11995603 2017-11-05 stsp 	char *path_refs = got_repo_get_path_refs(repo);
 98 4027f31a 2017-11-04 stsp 	char *path_head = get_path_head(repo);
 99 4027f31a 2017-11-04 stsp 	int ret;
100 4027f31a 2017-11-04 stsp 
101 4027f31a 2017-11-04 stsp 	ret = (path_git != NULL) && (path_objects != NULL) &&
102 4027f31a 2017-11-04 stsp 	    (path_refs != NULL) && (path_head != NULL);
103 4027f31a 2017-11-04 stsp 
104 4027f31a 2017-11-04 stsp 	free(path_git);
105 4027f31a 2017-11-04 stsp 	free(path_objects);
106 4027f31a 2017-11-04 stsp 	free(path_refs);
107 4027f31a 2017-11-04 stsp 	free(path_head);
108 4027f31a 2017-11-04 stsp 	return ret;
109 4027f31a 2017-11-04 stsp 
110 4027f31a 2017-11-04 stsp }
111 4027f31a 2017-11-04 stsp 
112 4027f31a 2017-11-04 stsp const struct got_error *
113 92af5469 2017-11-05 stsp got_repo_open(struct got_repository **ret, const char *path)
114 4027f31a 2017-11-04 stsp {
115 92af5469 2017-11-05 stsp 	struct got_repository *repo = NULL;
116 92af5469 2017-11-05 stsp 	const struct got_error *err = NULL;
117 92af5469 2017-11-05 stsp 	char *abspath = got_path_get_absolute(path);
118 4027f31a 2017-11-04 stsp 
119 92af5469 2017-11-05 stsp 	if (abspath == NULL)
120 92af5469 2017-11-05 stsp 		return got_error(GOT_ERR_BAD_PATH);
121 4027f31a 2017-11-04 stsp 
122 4027f31a 2017-11-04 stsp 	repo = calloc(1, sizeof(*repo));
123 92af5469 2017-11-05 stsp 	if (repo == NULL) {
124 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_NO_MEM);
125 92af5469 2017-11-05 stsp 		goto done;
126 92af5469 2017-11-05 stsp 	}
127 4027f31a 2017-11-04 stsp 
128 4027f31a 2017-11-04 stsp 	repo->path = got_path_normalize(abspath);
129 92af5469 2017-11-05 stsp 	if (repo->path == NULL) {
130 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_BAD_PATH);
131 92af5469 2017-11-05 stsp 		goto done;
132 92af5469 2017-11-05 stsp 	}
133 4027f31a 2017-11-04 stsp 
134 92af5469 2017-11-05 stsp 	if (!is_git_repo(repo)) {
135 92af5469 2017-11-05 stsp 		err = got_error(GOT_ERR_NOT_GIT_REPO);
136 92af5469 2017-11-05 stsp 		goto done;
137 92af5469 2017-11-05 stsp 	}
138 4027f31a 2017-11-04 stsp 		
139 4027f31a 2017-11-04 stsp 	*ret = repo;
140 92af5469 2017-11-05 stsp done:
141 92af5469 2017-11-05 stsp 	if (err)
142 92af5469 2017-11-05 stsp 		free(repo);
143 92af5469 2017-11-05 stsp 	free(abspath);
144 92af5469 2017-11-05 stsp 	return err;
145 4027f31a 2017-11-04 stsp }
146 4027f31a 2017-11-04 stsp 
147 4027f31a 2017-11-04 stsp void
148 4027f31a 2017-11-04 stsp got_repo_close(struct got_repository *repo)
149 4027f31a 2017-11-04 stsp {
150 4027f31a 2017-11-04 stsp 	free(repo->path);
151 4027f31a 2017-11-04 stsp 	free(repo);
152 4027f31a 2017-11-04 stsp }