Simplify calling of CR/LF conversion routines
[git/git.git] / entry.c
1 #include "cache.h"
2 #include "blob.h"
3
4 static void create_directories(const char *path, struct checkout *state)
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) {
11 len = slash - path;
12 memcpy(buf, path, len);
13 buf[len] = 0;
14 if (mkdir(buf, 0777)) {
15 if (errno == EEXIST) {
16 struct stat st;
17 if (len > state->base_dir_len && state->force && !unlink(buf) && !mkdir(buf, 0777))
18 continue;
19 if (!stat(buf, &st) && S_ISDIR(st.st_mode))
20 continue; /* ok */
21 }
22 die("cannot create directory at %s", buf);
23 }
24 }
25 free(buf);
26 }
27
28 static void remove_subtree(const char *path)
29 {
30 DIR *dir = opendir(path);
31 struct dirent *de;
32 char pathbuf[PATH_MAX];
33 char *name;
34
35 if (!dir)
36 die("cannot opendir %s", path);
37 strcpy(pathbuf, path);
38 name = pathbuf + strlen(path);
39 *name++ = '/';
40 while ((de = readdir(dir)) != NULL) {
41 struct stat st;
42 if ((de->d_name[0] == '.') &&
43 ((de->d_name[1] == 0) ||
44 ((de->d_name[1] == '.') && de->d_name[2] == 0)))
45 continue;
46 strcpy(name, de->d_name);
47 if (lstat(pathbuf, &st))
48 die("cannot lstat %s", pathbuf);
49 if (S_ISDIR(st.st_mode))
50 remove_subtree(pathbuf);
51 else if (unlink(pathbuf))
52 die("cannot unlink %s", pathbuf);
53 }
54 closedir(dir);
55 if (rmdir(path))
56 die("cannot rmdir %s", path);
57 }
58
59 static int create_file(const char *path, unsigned int mode)
60 {
61 mode = (mode & 0100) ? 0777 : 0666;
62 return open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
63 }
64
65 static int write_entry(struct cache_entry *ce, char *path, struct checkout *state, int to_tempfile)
66 {
67 int fd;
68 void *new;
69 unsigned long size;
70 long wrote;
71 enum object_type type;
72
73 new = read_sha1_file(ce->sha1, &type, &size);
74 if (!new || type != OBJ_BLOB) {
75 if (new)
76 free(new);
77 return error("git-checkout-index: unable to read sha1 file of %s (%s)",
78 path, sha1_to_hex(ce->sha1));
79 }
80 switch (ntohl(ce->ce_mode) & S_IFMT) {
81 char *buf;
82
83 case S_IFREG:
84 if (to_tempfile) {
85 strcpy(path, ".merge_file_XXXXXX");
86 fd = mkstemp(path);
87 } else
88 fd = create_file(path, ntohl(ce->ce_mode));
89 if (fd < 0) {
90 free(new);
91 return error("git-checkout-index: unable to create file %s (%s)",
92 path, strerror(errno));
93 }
94
95 /*
96 * Convert from git internal format to working tree format
97 */
98 buf = convert_to_working_tree(ce->name, new, &size);
99 if (buf) {
100 free(new);
101 new = buf;
102 }
103
104 wrote = write_in_full(fd, new, size);
105 close(fd);
106 free(new);
107 if (wrote != size)
108 return error("git-checkout-index: unable to write file %s", path);
109 break;
110 case S_IFLNK:
111 if (to_tempfile || !has_symlinks) {
112 if (to_tempfile) {
113 strcpy(path, ".merge_link_XXXXXX");
114 fd = mkstemp(path);
115 } else
116 fd = create_file(path, 0666);
117 if (fd < 0) {
118 free(new);
119 return error("git-checkout-index: unable to create "
120 "file %s (%s)", path, strerror(errno));
121 }
122 wrote = write_in_full(fd, new, size);
123 close(fd);
124 free(new);
125 if (wrote != size)
126 return error("git-checkout-index: unable to write file %s",
127 path);
128 } else {
129 wrote = symlink(new, path);
130 free(new);
131 if (wrote)
132 return error("git-checkout-index: unable to create "
133 "symlink %s (%s)", path, strerror(errno));
134 }
135 break;
136 default:
137 free(new);
138 return error("git-checkout-index: unknown file mode for %s", path);
139 }
140
141 if (state->refresh_cache) {
142 struct stat st;
143 lstat(ce->name, &st);
144 fill_stat_cache_info(ce, &st);
145 }
146 return 0;
147 }
148
149 int checkout_entry(struct cache_entry *ce, struct checkout *state, char *topath)
150 {
151 static char path[PATH_MAX + 1];
152 struct stat st;
153 int len = state->base_dir_len;
154
155 if (topath)
156 return write_entry(ce, topath, state, 1);
157
158 memcpy(path, state->base_dir, len);
159 strcpy(path + len, ce->name);
160
161 if (!lstat(path, &st)) {
162 unsigned changed = ce_match_stat(ce, &st, 1);
163 if (!changed)
164 return 0;
165 if (!state->force) {
166 if (!state->quiet)
167 fprintf(stderr, "git-checkout-index: %s already exists\n", path);
168 return -1;
169 }
170
171 /*
172 * We unlink the old file, to get the new one with the
173 * right permissions (including umask, which is nasty
174 * to emulate by hand - much easier to let the system
175 * just do the right thing)
176 */
177 unlink(path);
178 if (S_ISDIR(st.st_mode)) {
179 if (!state->force)
180 return error("%s is a directory", path);
181 remove_subtree(path);
182 }
183 } else if (state->not_new)
184 return 0;
185 create_directories(path, state);
186 return write_entry(ce, path, state, 0);
187 }