Blob


1 /*
2 * Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
17 /*
18 * State information for a tracked file in a work tree.
19 * When written to disk, multi-byte fields are written in big-endian.
20 * Some fields are based on results from stat(2). These are only used in
21 * order to detect modifications made to on-disk files, they are never
22 * applied back to the filesystem.
23 */
24 struct got_fileindex_entry {
25 RB_ENTRY(got_fileindex_entry) entry;
26 uint64_t ctime_sec;
27 uint64_t ctime_nsec;
28 uint64_t mtime_sec;
29 uint64_t mtime_nsec;
30 uint32_t uid;
31 uint32_t gid;
32 /*
33 * On-disk size is truncated to the lower 32 bits.
34 * The value is only used to check for modifications anyway.
35 */
36 uint32_t size;
38 uint16_t mode;
39 #define GOT_FILEIDX_MODE_FILE_TYPE 0x000f
40 #define GOT_FILEIDX_MODE_FILE_TYPE_ONDISK 0x0003
41 #define GOT_FILEIDX_MODE_FILE_TYPE_STAGED 0x000c
42 #define GOT_FILEIDX_MODE_FILE_TYPE_STAGED_SHIFT 2
43 #define GOT_FILEIDX_MODE_REGULAR_FILE 1
44 #define GOT_FILEIDX_MODE_SYMLINK 2
45 #define GOT_FILEIDX_MODE_BAD_SYMLINK 3
46 #define GOT_FILEIDX_MODE_PERMS 0xfff0
47 #define GOT_FILEIDX_MODE_PERMS_SHIFT 4
49 /* SHA1 of corresponding blob in repository. */
50 uint8_t blob_sha1[SHA1_DIGEST_LENGTH];
52 /* SHA1 of corresponding base commit in repository. */
53 uint8_t commit_sha1[SHA1_DIGEST_LENGTH];
55 uint32_t flags;
57 /*
58 * UNIX-style path, relative to work tree root.
59 * Variable length, and NUL-padded to a multiple of 8 on disk.
60 */
61 char *path;
63 /*
64 * (since GOT_FILE_INDEX_VERSION 2)
65 * SHA1 of staged blob in repository if stage equals either
66 * GOT_FILEIDX_STAGE_MODIFY or GOT_FILEIDX_STAGE_ADD.
67 * Otherwise, this field is not written to disk.
68 */
69 uint8_t staged_blob_sha1[SHA1_DIGEST_LENGTH];
70 };
72 /* Modifications explicitly staged for commit. */
73 #define GOT_FILEIDX_STAGE_NONE 0
74 #define GOT_FILEIDX_STAGE_MODIFY 1
75 #define GOT_FILEIDX_STAGE_ADD 2
76 #define GOT_FILEIDX_STAGE_DELETE 3
78 struct got_fileindex;
80 RB_HEAD(got_fileindex_tree, got_fileindex_entry);
82 size_t got_fileindex_entry_path_len(const struct got_fileindex_entry *);
84 static inline int
85 got_fileindex_cmp(const struct got_fileindex_entry *e1,
86 const struct got_fileindex_entry *e2)
87 {
88 return got_path_cmp(e1->path, e2->path,
89 got_fileindex_entry_path_len(e1),
90 got_fileindex_entry_path_len(e2));
91 }
93 RB_PROTOTYPE(got_fileindex_tree, got_fileindex_entry, entry, got_fileindex_cmp);
95 /* On-disk file index header structure. */
96 struct got_fileindex_hdr {
97 uint32_t signature; /* big-endian */
98 #define GOT_FILE_INDEX_SIGNATURE 0x676f7449 /* 'g', 'o', 't', 'I' */
99 uint32_t version; /* big-endian */
100 #define GOT_FILE_INDEX_VERSION 2
101 uint32_t nentries; /* big-endian */
102 /* list of concatenated fileindex entries */
103 uint8_t sha1[SHA1_DIGEST_LENGTH]; /* checksum of above on-disk data */
104 };
106 mode_t got_fileindex_entry_perms_get(struct got_fileindex_entry *);
107 uint16_t got_fileindex_perms_from_st(struct stat *);
108 mode_t got_fileindex_perms_to_st(struct got_fileindex_entry *);
110 const struct got_error *got_fileindex_entry_update(struct got_fileindex_entry *,
111 int, const char *, uint8_t *, uint8_t *, int);
112 void got_fileindex_entry_mark_skipped(struct got_fileindex_entry *);
113 const struct got_error *got_fileindex_entry_alloc(struct got_fileindex_entry **,
114 const char *);
115 void got_fileindex_entry_free(struct got_fileindex_entry *);
117 struct got_fileindex *got_fileindex_alloc(void);
118 void got_fileindex_free(struct got_fileindex *);
119 const struct got_error *got_fileindex_write(struct got_fileindex *, FILE *);
120 const struct got_error *got_fileindex_entry_add(struct got_fileindex *,
121 struct got_fileindex_entry *);
122 void got_fileindex_entry_remove(struct got_fileindex *,
123 struct got_fileindex_entry *);
124 struct got_fileindex_entry *got_fileindex_entry_get(struct got_fileindex *,
125 const char *, size_t);
126 const struct got_error *got_fileindex_read(struct got_fileindex *, FILE *);
127 typedef const struct got_error *(*got_fileindex_cb)(void *,
128 struct got_fileindex_entry *);
129 const struct got_error *got_fileindex_for_each_entry_safe(
130 struct got_fileindex *, got_fileindex_cb cb, void *);
132 typedef const struct got_error *(*got_fileindex_diff_tree_old_new_cb)(void *,
133 struct got_fileindex_entry *, struct got_tree_entry *, const char *);
134 typedef const struct got_error *(*got_fileindex_diff_tree_old_cb)(void *,
135 struct got_fileindex_entry *, const char *);
136 typedef const struct got_error *(*got_fileindex_diff_tree_new_cb)(void *,
137 struct got_tree_entry *, const char *);
138 struct got_fileindex_diff_tree_cb {
139 got_fileindex_diff_tree_old_new_cb diff_old_new;
140 got_fileindex_diff_tree_old_cb diff_old;
141 got_fileindex_diff_tree_new_cb diff_new;
142 };
143 const struct got_error *got_fileindex_diff_tree(struct got_fileindex *,
144 struct got_tree_object *, const char *, const char *,
145 struct got_repository *, struct got_fileindex_diff_tree_cb *, void *);
147 typedef const struct got_error *(*got_fileindex_diff_dir_old_new_cb)(void *,
148 struct got_fileindex_entry *, struct dirent *, const char *, int);
149 typedef const struct got_error *(*got_fileindex_diff_dir_old_cb)(void *,
150 struct got_fileindex_entry *, const char *);
151 typedef const struct got_error *(*got_fileindex_diff_dir_new_cb)(int *, void *,
152 struct dirent *, const char *, int);
153 typedef const struct got_error *(*got_fileindex_diff_dir_traverse)(void *,
154 const char *, int);
155 struct got_fileindex_diff_dir_cb {
156 got_fileindex_diff_dir_old_new_cb diff_old_new;
157 got_fileindex_diff_dir_old_cb diff_old;
158 got_fileindex_diff_dir_new_cb diff_new;
159 got_fileindex_diff_dir_traverse diff_traverse;
160 };
161 const struct got_error *got_fileindex_diff_dir(struct got_fileindex *, int,
162 const char *, const char *, struct got_repository *,
163 struct got_fileindex_diff_dir_cb *, void *);
165 int got_fileindex_entry_has_blob(struct got_fileindex_entry *);
166 int got_fileindex_entry_has_commit(struct got_fileindex_entry *);
167 int got_fileindex_entry_has_file_on_disk(struct got_fileindex_entry *);
168 int got_fileindex_entry_was_skipped(struct got_fileindex_entry *);
169 uint32_t got_fileindex_entry_stage_get(const struct got_fileindex_entry *);
170 void got_fileindex_entry_stage_set(struct got_fileindex_entry *ie, uint32_t);
171 int got_fileindex_entry_filetype_get(struct got_fileindex_entry *);
172 void got_fileindex_entry_filetype_set(struct got_fileindex_entry *, int);
173 void got_fileindex_entry_staged_filetype_set(struct got_fileindex_entry *, int);
174 int got_fileindex_entry_staged_filetype_get(struct got_fileindex_entry *);
176 void got_fileindex_entry_mark_deleted_from_disk(struct got_fileindex_entry *);