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Commit | Line | Data |
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12dccc16 | 1 | #include "cache.h" |
8e440259 | 2 | #include "blob.h" |
12dccc16 | 3 | |
efbc5831 | 4 | static 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 | ||
51 | static 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 | 82 | static 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 |
88 | static 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 | 101 | static 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) { |
f0807e62 | 107 | char *buf, *new; |
a2d7c6c6 | 108 | unsigned long size; |
6c510bee | 109 | |
12dccc16 | 110 | case S_IFREG: |
f0807e62 LT |
111 | new = read_blob_entry(ce, path, &size); |
112 | if (!new) | |
113 | return error("git-checkout-index: unable to read sha1 file of %s (%s)", | |
114 | path, sha1_to_hex(ce->sha1)); | |
1a9d7e9b JH |
115 | |
116 | /* | |
117 | * Convert from git internal format to working tree format | |
118 | */ | |
119 | buf = convert_to_working_tree(ce->name, new, &size); | |
120 | if (buf) { | |
121 | free(new); | |
122 | new = buf; | |
123 | } | |
124 | ||
de84f99c SP |
125 | if (to_tempfile) { |
126 | strcpy(path, ".merge_file_XXXXXX"); | |
127 | fd = mkstemp(path); | |
128 | } else | |
129 | fd = create_file(path, ntohl(ce->ce_mode)); | |
12dccc16 LT |
130 | if (fd < 0) { |
131 | free(new); | |
215a7ad1 | 132 | return error("git-checkout-index: unable to create file %s (%s)", |
12dccc16 LT |
133 | path, strerror(errno)); |
134 | } | |
6c510bee | 135 | |
93822c22 | 136 | wrote = write_in_full(fd, new, size); |
12dccc16 LT |
137 | close(fd); |
138 | free(new); | |
139 | if (wrote != size) | |
215a7ad1 | 140 | return error("git-checkout-index: unable to write file %s", path); |
12dccc16 LT |
141 | break; |
142 | case S_IFLNK: | |
f0807e62 LT |
143 | new = read_blob_entry(ce, path, &size); |
144 | if (!new) | |
145 | return error("git-checkout-index: unable to read sha1 file of %s (%s)", | |
146 | path, sha1_to_hex(ce->sha1)); | |
78a8d641 JS |
147 | if (to_tempfile || !has_symlinks) { |
148 | if (to_tempfile) { | |
149 | strcpy(path, ".merge_link_XXXXXX"); | |
150 | fd = mkstemp(path); | |
151 | } else | |
152 | fd = create_file(path, 0666); | |
de84f99c SP |
153 | if (fd < 0) { |
154 | free(new); | |
155 | return error("git-checkout-index: unable to create " | |
156 | "file %s (%s)", path, strerror(errno)); | |
157 | } | |
93822c22 | 158 | wrote = write_in_full(fd, new, size); |
de84f99c SP |
159 | close(fd); |
160 | free(new); | |
161 | if (wrote != size) | |
162 | return error("git-checkout-index: unable to write file %s", | |
163 | path); | |
164 | } else { | |
165 | wrote = symlink(new, path); | |
12dccc16 | 166 | free(new); |
de84f99c SP |
167 | if (wrote) |
168 | return error("git-checkout-index: unable to create " | |
169 | "symlink %s (%s)", path, strerror(errno)); | |
12dccc16 | 170 | } |
12dccc16 | 171 | break; |
302b9282 | 172 | case S_IFGITLINK: |
f0807e62 LT |
173 | if (to_tempfile) |
174 | return error("git-checkout-index: cannot create temporary subproject %s", path); | |
175 | if (mkdir(path, 0777) < 0) | |
176 | return error("git-checkout-index: cannot create subproject directory %s", path); | |
177 | break; | |
12dccc16 | 178 | default: |
215a7ad1 | 179 | return error("git-checkout-index: unknown file mode for %s", path); |
12dccc16 LT |
180 | } |
181 | ||
6ee67f26 | 182 | if (state->refresh_cache) { |
12dccc16 LT |
183 | struct stat st; |
184 | lstat(ce->name, &st); | |
185 | fill_stat_cache_info(ce, &st); | |
186 | } | |
187 | return 0; | |
188 | } | |
189 | ||
efbc5831 | 190 | int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath) |
12dccc16 | 191 | { |
095c424d | 192 | static char path[PATH_MAX + 1]; |
de84f99c | 193 | struct stat st; |
12dccc16 LT |
194 | int len = state->base_dir_len; |
195 | ||
de84f99c SP |
196 | if (topath) |
197 | return write_entry(ce, topath, state, 1); | |
198 | ||
12dccc16 LT |
199 | memcpy(path, state->base_dir, len); |
200 | strcpy(path + len, ce->name); | |
201 | ||
202 | if (!lstat(path, &st)) { | |
5f73076c | 203 | unsigned changed = ce_match_stat(ce, &st, 1); |
12dccc16 LT |
204 | if (!changed) |
205 | return 0; | |
206 | if (!state->force) { | |
207 | if (!state->quiet) | |
215a7ad1 | 208 | fprintf(stderr, "git-checkout-index: %s already exists\n", path); |
4b12dae6 | 209 | return -1; |
12dccc16 LT |
210 | } |
211 | ||
212 | /* | |
213 | * We unlink the old file, to get the new one with the | |
214 | * right permissions (including umask, which is nasty | |
215 | * to emulate by hand - much easier to let the system | |
216 | * just do the right thing) | |
217 | */ | |
218 | unlink(path); | |
d48a72f3 | 219 | if (S_ISDIR(st.st_mode)) { |
f0807e62 | 220 | /* If it is a gitlink, leave it alone! */ |
302b9282 | 221 | if (S_ISGITLINK(ntohl(ce->ce_mode))) |
f0807e62 | 222 | return 0; |
d48a72f3 LT |
223 | if (!state->force) |
224 | return error("%s is a directory", path); | |
225 | remove_subtree(path); | |
226 | } | |
de84f99c | 227 | } else if (state->not_new) |
12dccc16 LT |
228 | return 0; |
229 | create_directories(path, state); | |
de84f99c | 230 | return write_entry(ce, path, state, 0); |
12dccc16 | 231 | } |