rebase -i --root: fix check for number of arguments
[git/platforms.git] / entry.c
blob05aa58d34823258789ec9e32abc897b8e6777412
1 #include "cache.h"
2 #include "blob.h"
3 #include "dir.h"
5 static void create_directories(const char *path, const struct checkout *state)
7 int len = strlen(path);
8 char *buf = xmalloc(len + 1);
9 const char *slash = path;
11 while ((slash = strchr(slash+1, '/')) != NULL) {
12 len = slash - path;
13 memcpy(buf, path, len);
14 buf[len] = 0;
17 * For 'checkout-index --prefix=<dir>', <dir> is
18 * allowed to be a symlink to an existing directory,
19 * and we set 'state->base_dir_len' below, such that
20 * we test the path components of the prefix with the
21 * stat() function instead of the lstat() function.
23 if (has_dirs_only_path(len, buf, state->base_dir_len))
24 continue; /* ok, it is already a directory. */
27 * If this mkdir() would fail, it could be that there
28 * is already a symlink or something else exists
29 * there, therefore we then try to unlink it and try
30 * one more time to create the directory.
32 if (mkdir(buf, 0777)) {
33 if (errno == EEXIST && state->force &&
34 !unlink(buf) && !mkdir(buf, 0777))
35 continue;
36 die("cannot create directory at %s", buf);
39 free(buf);
42 static void remove_subtree(const char *path)
44 DIR *dir = opendir(path);
45 struct dirent *de;
46 char pathbuf[PATH_MAX];
47 char *name;
49 if (!dir)
50 die("cannot opendir %s (%s)", path, strerror(errno));
51 strcpy(pathbuf, path);
52 name = pathbuf + strlen(path);
53 *name++ = '/';
54 while ((de = readdir(dir)) != NULL) {
55 struct stat st;
56 if (is_dot_or_dotdot(de->d_name))
57 continue;
58 strcpy(name, de->d_name);
59 if (lstat(pathbuf, &st))
60 die("cannot lstat %s (%s)", pathbuf, strerror(errno));
61 if (S_ISDIR(st.st_mode))
62 remove_subtree(pathbuf);
63 else if (unlink(pathbuf))
64 die("cannot unlink %s (%s)", pathbuf, strerror(errno));
66 closedir(dir);
67 if (rmdir(path))
68 die("cannot rmdir %s (%s)", path, strerror(errno));
71 static int create_file(const char *path, unsigned int mode)
73 mode = (mode & 0100) ? 0777 : 0666;
74 return open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
77 static void *read_blob_entry(struct cache_entry *ce, const char *path, unsigned long *size)
79 enum object_type type;
80 void *new = read_sha1_file(ce->sha1, &type, size);
82 if (new) {
83 if (type == OBJ_BLOB)
84 return new;
85 free(new);
87 return NULL;
90 static int write_entry(struct cache_entry *ce, char *path, const struct checkout *state, int to_tempfile)
92 int fd;
93 long wrote;
95 switch (ce->ce_mode & S_IFMT) {
96 char *new;
97 struct strbuf buf;
98 unsigned long size;
100 case S_IFREG:
101 new = read_blob_entry(ce, path, &size);
102 if (!new)
103 return error("git checkout-index: unable to read sha1 file of %s (%s)",
104 path, sha1_to_hex(ce->sha1));
107 * Convert from git internal format to working tree format
109 strbuf_init(&buf, 0);
110 if (convert_to_working_tree(ce->name, new, size, &buf)) {
111 size_t newsize = 0;
112 free(new);
113 new = strbuf_detach(&buf, &newsize);
114 size = newsize;
117 if (to_tempfile) {
118 strcpy(path, ".merge_file_XXXXXX");
119 fd = mkstemp(path);
120 } else
121 fd = create_file(path, ce->ce_mode);
122 if (fd < 0) {
123 free(new);
124 return error("git checkout-index: unable to create file %s (%s)",
125 path, strerror(errno));
128 wrote = write_in_full(fd, new, size);
129 close(fd);
130 free(new);
131 if (wrote != size)
132 return error("git checkout-index: unable to write file %s", path);
133 break;
134 case S_IFLNK:
135 new = read_blob_entry(ce, path, &size);
136 if (!new)
137 return error("git checkout-index: unable to read sha1 file of %s (%s)",
138 path, sha1_to_hex(ce->sha1));
139 if (to_tempfile || !has_symlinks) {
140 if (to_tempfile) {
141 strcpy(path, ".merge_link_XXXXXX");
142 fd = mkstemp(path);
143 } else
144 fd = create_file(path, 0666);
145 if (fd < 0) {
146 free(new);
147 return error("git checkout-index: unable to create "
148 "file %s (%s)", path, strerror(errno));
150 wrote = write_in_full(fd, new, size);
151 close(fd);
152 free(new);
153 if (wrote != size)
154 return error("git checkout-index: unable to write file %s",
155 path);
156 } else {
157 wrote = symlink(new, path);
158 free(new);
159 if (wrote)
160 return error("git checkout-index: unable to create "
161 "symlink %s (%s)", path, strerror(errno));
163 break;
164 case S_IFGITLINK:
165 if (to_tempfile)
166 return error("git checkout-index: cannot create temporary subproject %s", path);
167 if (mkdir(path, 0777) < 0)
168 return error("git checkout-index: cannot create subproject directory %s", path);
169 break;
170 default:
171 return error("git checkout-index: unknown file mode for %s", path);
174 if (state->refresh_cache) {
175 struct stat st;
176 lstat(ce->name, &st);
177 fill_stat_cache_info(ce, &st);
179 return 0;
182 int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath)
184 static char path[PATH_MAX + 1];
185 struct stat st;
186 int len = state->base_dir_len;
188 if (topath)
189 return write_entry(ce, topath, state, 1);
191 memcpy(path, state->base_dir, len);
192 strcpy(path + len, ce->name);
194 if (!lstat(path, &st)) {
195 unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID);
196 if (!changed)
197 return 0;
198 if (!state->force) {
199 if (!state->quiet)
200 fprintf(stderr, "git-checkout-index: %s already exists\n", path);
201 return -1;
205 * We unlink the old file, to get the new one with the
206 * right permissions (including umask, which is nasty
207 * to emulate by hand - much easier to let the system
208 * just do the right thing)
210 if (S_ISDIR(st.st_mode)) {
211 /* If it is a gitlink, leave it alone! */
212 if (S_ISGITLINK(ce->ce_mode))
213 return 0;
214 if (!state->force)
215 return error("%s is a directory", path);
216 remove_subtree(path);
217 } else if (unlink(path))
218 return error("unable to unlink old '%s' (%s)", path, strerror(errno));
219 } else if (state->not_new)
220 return 0;
221 create_directories(path, state);
222 return write_entry(ce, path, state, 0);