1 #include <assert.h>
2 #include <limits.h>
3 #include <stdlib.h>
4 #include <stdio.h>
5 #include <sha1.h>
6 #include <string.h>
7 
8 #include "got_path.h"
9 #include "got_error.h"
10 #include "got_refs.h"
11 #include "got_repository.h"
12 
13 #define GOT_GIT_DIR	".git"
14 
15 /* Mandatory files and directories inside the git directory. */
16 #define GOT_OBJECTS_DIR	"objects"
17 #define GOT_REFS_DIR	"refs"
18 #define GOT_HEAD_FILE	"HEAD"
19 
20 static char *
21 get_path_git_dir(struct got_repository *repo)
22 {
23 	char *path_git;
24 	
25 	if (asprintf(&path_git, "%s/%s", repo->path, GOT_GIT_DIR) == -1)
26 		return NULL;
27 
28 	return path_git;
29 }
30 
31 static char *
32 get_path_git_child(struct got_repository *repo, const char *basename)
33 {
34 	char *path_child;
35 	
36 	if (asprintf(&path_child, "%s/%s/%s", repo->path, GOT_GIT_DIR,
37 	    basename) == -1)
38 		return NULL;
39 
40 	return path_child;
41 }
42 
43 static char *
44 get_path_objects(struct got_repository *repo)
45 {
46 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
47 }
48 
49 static char *
50 get_path_refs(struct got_repository *repo)
51 {
52 	return get_path_git_child(repo, GOT_REFS_DIR);
53 }
54 
55 static char *
56 get_path_head(struct got_repository *repo)
57 {
58 	return get_path_git_child(repo, GOT_HEAD_FILE);
59 }
60 
61 static int
62 is_git_repo(struct got_repository *repo)
63 {
64 	char *path_git = get_path_git_dir(repo);
65 	char *path_objects = get_path_objects(repo);
66 	char *path_refs = get_path_refs(repo);
67 	char *path_head = get_path_head(repo);
68 	int ret;
69 
70 	ret = (path_git != NULL) && (path_objects != NULL) &&
71 	    (path_refs != NULL) && (path_head != NULL);
72 
73 	free(path_git);
74 	free(path_objects);
75 	free(path_refs);
76 	free(path_head);
77 	return ret;
78 
79 }
80 
81 const struct got_error *
82 got_repo_open(struct got_repository **ret, const char *abspath)
83 {
84 	struct got_repository *repo;
85 
86 	if (!got_path_is_absolute(abspath))
87 		return got_error(GOT_ERR_NOT_ABSPATH);
88 
89 	repo = calloc(1, sizeof(*repo));
90 	if (repo == NULL)
91 		return got_error(GOT_ERR_NO_MEM);
92 
93 	repo->path = got_path_normalize(abspath);
94 	if (repo->path == NULL)
95 		return got_error(GOT_ERR_BAD_PATH);
96 
97 	if (!is_git_repo(repo))
98 		return got_error(GOT_ERR_NOT_GIT_REPO);
99 		
100 	*ret = repo;
101 	return NULL;
102 }
103 
104 void
105 got_repo_close(struct got_repository *repo)
106 {
107 	free(repo->path);
108 	free(repo);
109 }
110 
111 const char *
112 got_repo_get_path(struct got_repository *repo)
113 {
114 	return repo->path;
115 }
116 
117 const struct got_error *
118 got_repo_get_reference(struct got_reference **ref,
119     struct got_repository *repo, const char *refname)
120 {
121 	const struct got_error *err = NULL;
122 	char *path_refs;
123 
124 	/* Some refs live in the .git directory. */
125 	if (strcmp(refname, GOT_REF_HEAD) == 0)
126 		path_refs = get_path_git_dir(repo);
127 	else
128 		path_refs = get_path_refs(repo);
129 
130 	err = got_ref_open(ref, path_refs, refname);
131 	free(path_refs);
132 	return err;
133 }