Rewrite convert_to_{git,working_tree} to use strbuf's.
[git/git.git] / entry.c
CommitLineData
12dccc16 1#include "cache.h"
8e440259 2#include "blob.h"
12dccc16 3
efbc5831 4static void create_directories(const char *path, const struct checkout *state)
12dccc16
LT
5{
6 int len = strlen(path);
7 char *buf = xmalloc(len + 1);
8 const char *slash = path;
9
10 while ((slash = strchr(slash+1, '/')) != NULL) {
fa2e71c9
JH
11 struct stat st;
12 int stat_status;
13
12dccc16
LT
14 len = slash - path;
15 memcpy(buf, path, len);
16 buf[len] = 0;
fa2e71c9
JH
17
18 if (len <= state->base_dir_len)
19 /*
20 * checkout-index --prefix=<dir>; <dir> is
21 * allowed to be a symlink to an existing
22 * directory.
23 */
24 stat_status = stat(buf, &st);
25 else
26 /*
27 * if there currently is a symlink, we would
28 * want to replace it with a real directory.
29 */
30 stat_status = lstat(buf, &st);
31
32 if (!stat_status && S_ISDIR(st.st_mode))
33 continue; /* ok, it is already a directory. */
34
35 /*
36 * We know stat_status == 0 means something exists
37 * there and this mkdir would fail, but that is an
38 * error codepath; we do not care, as we unlink and
39 * mkdir again in such a case.
40 */
f312de01 41 if (mkdir(buf, 0777)) {
fa2e71c9
JH
42 if (errno == EEXIST && state->force &&
43 !unlink(buf) && !mkdir(buf, 0777))
44 continue;
12dccc16
LT
45 die("cannot create directory at %s", buf);
46 }
47 }
48 free(buf);
49}
50
51static void remove_subtree(const char *path)
52{
53 DIR *dir = opendir(path);
54 struct dirent *de;
55 char pathbuf[PATH_MAX];
56 char *name;
a6080a0a 57
12dccc16 58 if (!dir)
cc2903fc 59 die("cannot opendir %s (%s)", path, strerror(errno));
12dccc16
LT
60 strcpy(pathbuf, path);
61 name = pathbuf + strlen(path);
62 *name++ = '/';
63 while ((de = readdir(dir)) != NULL) {
64 struct stat st;
65 if ((de->d_name[0] == '.') &&
66 ((de->d_name[1] == 0) ||
67 ((de->d_name[1] == '.') && de->d_name[2] == 0)))
68 continue;
69 strcpy(name, de->d_name);
70 if (lstat(pathbuf, &st))
cc2903fc 71 die("cannot lstat %s (%s)", pathbuf, strerror(errno));
12dccc16
LT
72 if (S_ISDIR(st.st_mode))
73 remove_subtree(pathbuf);
74 else if (unlink(pathbuf))
cc2903fc 75 die("cannot unlink %s (%s)", pathbuf, strerror(errno));
12dccc16
LT
76 }
77 closedir(dir);
78 if (rmdir(path))
cc2903fc 79 die("cannot rmdir %s (%s)", path, strerror(errno));
12dccc16
LT
80}
81
d48a72f3 82static int create_file(const char *path, unsigned int mode)
12dccc16 83{
12dccc16 84 mode = (mode & 0100) ? 0777 : 0666;
781411ed 85 return open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
12dccc16
LT
86}
87
f0807e62
LT
88static void *read_blob_entry(struct cache_entry *ce, const char *path, unsigned long *size)
89{
90 enum object_type type;
91 void *new = read_sha1_file(ce->sha1, &type, size);
92
93 if (new) {
94 if (type == OBJ_BLOB)
95 return new;
96 free(new);
97 }
98 return NULL;
99}
100
efbc5831 101static int write_entry(struct cache_entry *ce, char *path, const struct checkout *state, int to_tempfile)
12dccc16
LT
102{
103 int fd;
12dccc16 104 long wrote;
12dccc16 105
12dccc16 106 switch (ntohl(ce->ce_mode) & S_IFMT) {
5ecd293d
PH
107 char *new;
108 struct strbuf buf;
a2d7c6c6 109 unsigned long size;
6c510bee 110
12dccc16 111 case S_IFREG:
f0807e62
LT
112 new = read_blob_entry(ce, path, &size);
113 if (!new)
114 return error("git-checkout-index: unable to read sha1 file of %s (%s)",
115 path, sha1_to_hex(ce->sha1));
1a9d7e9b
JH
116
117 /*
118 * Convert from git internal format to working tree format
119 */
5ecd293d
PH
120 strbuf_init(&buf, 0);
121 if (convert_to_working_tree(ce->name, new, size, &buf)) {
1a9d7e9b 122 free(new);
5ecd293d
PH
123 new = buf.buf;
124 size = buf.len;
1a9d7e9b
JH
125 }
126
de84f99c
SP
127 if (to_tempfile) {
128 strcpy(path, ".merge_file_XXXXXX");
129 fd = mkstemp(path);
130 } else
131 fd = create_file(path, ntohl(ce->ce_mode));
12dccc16
LT
132 if (fd < 0) {
133 free(new);
215a7ad1 134 return error("git-checkout-index: unable to create file %s (%s)",
12dccc16
LT
135 path, strerror(errno));
136 }
6c510bee 137
93822c22 138 wrote = write_in_full(fd, new, size);
12dccc16
LT
139 close(fd);
140 free(new);
141 if (wrote != size)
215a7ad1 142 return error("git-checkout-index: unable to write file %s", path);
12dccc16
LT
143 break;
144 case S_IFLNK:
f0807e62
LT
145 new = read_blob_entry(ce, path, &size);
146 if (!new)
147 return error("git-checkout-index: unable to read sha1 file of %s (%s)",
148 path, sha1_to_hex(ce->sha1));
78a8d641
JS
149 if (to_tempfile || !has_symlinks) {
150 if (to_tempfile) {
151 strcpy(path, ".merge_link_XXXXXX");
152 fd = mkstemp(path);
153 } else
154 fd = create_file(path, 0666);
de84f99c
SP
155 if (fd < 0) {
156 free(new);
157 return error("git-checkout-index: unable to create "
158 "file %s (%s)", path, strerror(errno));
159 }
93822c22 160 wrote = write_in_full(fd, new, size);
de84f99c
SP
161 close(fd);
162 free(new);
163 if (wrote != size)
164 return error("git-checkout-index: unable to write file %s",
165 path);
166 } else {
167 wrote = symlink(new, path);
12dccc16 168 free(new);
de84f99c
SP
169 if (wrote)
170 return error("git-checkout-index: unable to create "
171 "symlink %s (%s)", path, strerror(errno));
12dccc16 172 }
12dccc16 173 break;
302b9282 174 case S_IFGITLINK:
f0807e62
LT
175 if (to_tempfile)
176 return error("git-checkout-index: cannot create temporary subproject %s", path);
177 if (mkdir(path, 0777) < 0)
178 return error("git-checkout-index: cannot create subproject directory %s", path);
179 break;
12dccc16 180 default:
215a7ad1 181 return error("git-checkout-index: unknown file mode for %s", path);
12dccc16
LT
182 }
183
6ee67f26 184 if (state->refresh_cache) {
12dccc16
LT
185 struct stat st;
186 lstat(ce->name, &st);
187 fill_stat_cache_info(ce, &st);
188 }
189 return 0;
190}
191
efbc5831 192int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath)
12dccc16 193{
095c424d 194 static char path[PATH_MAX + 1];
de84f99c 195 struct stat st;
12dccc16
LT
196 int len = state->base_dir_len;
197
de84f99c
SP
198 if (topath)
199 return write_entry(ce, topath, state, 1);
200
12dccc16
LT
201 memcpy(path, state->base_dir, len);
202 strcpy(path + len, ce->name);
203
204 if (!lstat(path, &st)) {
5f73076c 205 unsigned changed = ce_match_stat(ce, &st, 1);
12dccc16
LT
206 if (!changed)
207 return 0;
208 if (!state->force) {
209 if (!state->quiet)
215a7ad1 210 fprintf(stderr, "git-checkout-index: %s already exists\n", path);
4b12dae6 211 return -1;
12dccc16
LT
212 }
213
214 /*
215 * We unlink the old file, to get the new one with the
216 * right permissions (including umask, which is nasty
217 * to emulate by hand - much easier to let the system
218 * just do the right thing)
219 */
220 unlink(path);
d48a72f3 221 if (S_ISDIR(st.st_mode)) {
f0807e62 222 /* If it is a gitlink, leave it alone! */
302b9282 223 if (S_ISGITLINK(ntohl(ce->ce_mode)))
f0807e62 224 return 0;
d48a72f3
LT
225 if (!state->force)
226 return error("%s is a directory", path);
227 remove_subtree(path);
228 }
de84f99c 229 } else if (state->not_new)
12dccc16
LT
230 return 0;
231 create_directories(path, state);
de84f99c 232 return write_entry(ce, path, state, 0);
12dccc16 233}