Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: v1.5.2.5
Fetching contributors…

Cannot retrieve contributors at this time

file 230 lines (208 sloc) 5.803 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230
#include "cache.h"
#include "blob.h"

static void create_directories(const char *path, const struct checkout *state)
{
int len = strlen(path);
char *buf = xmalloc(len + 1);
const char *slash = path;

while ((slash = strchr(slash+1, '/')) != NULL) {
struct stat st;
int stat_status;

len = slash - path;
memcpy(buf, path, len);
buf[len] = 0;

if (len <= state->base_dir_len)
/*
* checkout-index --prefix=<dir>; <dir> is
* allowed to be a symlink to an existing
* directory.
*/
stat_status = stat(buf, &st);
else
/*
* if there currently is a symlink, we would
* want to replace it with a real directory.
*/
stat_status = lstat(buf, &st);

if (!stat_status && S_ISDIR(st.st_mode))
continue; /* ok, it is already a directory. */

/*
* We know stat_status == 0 means something exists
* there and this mkdir would fail, but that is an
* error codepath; we do not care, as we unlink and
* mkdir again in such a case.
*/
if (mkdir(buf, 0777)) {
if (errno == EEXIST && state->force &&
!unlink(buf) && !mkdir(buf, 0777))
continue;
die("cannot create directory at %s", buf);
}
}
free(buf);
}

static void remove_subtree(const char *path)
{
DIR *dir = opendir(path);
struct dirent *de;
char pathbuf[PATH_MAX];
char *name;

if (!dir)
die("cannot opendir %s (%s)", path, strerror(errno));
strcpy(pathbuf, path);
name = pathbuf + strlen(path);
*name++ = '/';
while ((de = readdir(dir)) != NULL) {
struct stat st;
if ((de->d_name[0] == '.') &&
((de->d_name[1] == 0) ||
((de->d_name[1] == '.') && de->d_name[2] == 0)))
continue;
strcpy(name, de->d_name);
if (lstat(pathbuf, &st))
die("cannot lstat %s (%s)", pathbuf, strerror(errno));
if (S_ISDIR(st.st_mode))
remove_subtree(pathbuf);
else if (unlink(pathbuf))
die("cannot unlink %s (%s)", pathbuf, strerror(errno));
}
closedir(dir);
if (rmdir(path))
die("cannot rmdir %s (%s)", path, strerror(errno));
}

static int create_file(const char *path, unsigned int mode)
{
mode = (mode & 0100) ? 0777 : 0666;
return open(path, O_WRONLY | O_CREAT | O_EXCL, mode);
}

static void *read_blob_entry(struct cache_entry *ce, const char *path, unsigned long *size)
{
enum object_type type;
void *new = read_sha1_file(ce->sha1, &type, size);

if (new) {
if (type == OBJ_BLOB)
return new;
free(new);
}
return NULL;
}

static int write_entry(struct cache_entry *ce, char *path, const struct checkout *state, int to_tempfile)
{
int fd;
long wrote;

switch (ntohl(ce->ce_mode) & S_IFMT) {
char *buf, *new;
unsigned long size;

case S_IFREG:
new = read_blob_entry(ce, path, &size);
if (!new)
return error("git-checkout-index: unable to read sha1 file of %s (%s)",
path, sha1_to_hex(ce->sha1));
if (to_tempfile) {
strcpy(path, ".merge_file_XXXXXX");
fd = mkstemp(path);
} else
fd = create_file(path, ntohl(ce->ce_mode));
if (fd < 0) {
free(new);
return error("git-checkout-index: unable to create file %s (%s)",
path, strerror(errno));
}

/*
* Convert from git internal format to working tree format
*/
buf = convert_to_working_tree(ce->name, new, &size);
if (buf) {
free(new);
new = buf;
}

wrote = write_in_full(fd, new, size);
close(fd);
free(new);
if (wrote != size)
return error("git-checkout-index: unable to write file %s", path);
break;
case S_IFLNK:
new = read_blob_entry(ce, path, &size);
if (!new)
return error("git-checkout-index: unable to read sha1 file of %s (%s)",
path, sha1_to_hex(ce->sha1));
if (to_tempfile || !has_symlinks) {
if (to_tempfile) {
strcpy(path, ".merge_link_XXXXXX");
fd = mkstemp(path);
} else
fd = create_file(path, 0666);
if (fd < 0) {
free(new);
return error("git-checkout-index: unable to create "
"file %s (%s)", path, strerror(errno));
}
wrote = write_in_full(fd, new, size);
close(fd);
free(new);
if (wrote != size)
return error("git-checkout-index: unable to write file %s",
path);
} else {
wrote = symlink(new, path);
free(new);
if (wrote)
return error("git-checkout-index: unable to create "
"symlink %s (%s)", path, strerror(errno));
}
break;
case S_IFDIRLNK:
if (to_tempfile)
return error("git-checkout-index: cannot create temporary subproject %s", path);
if (mkdir(path, 0777) < 0)
return error("git-checkout-index: cannot create subproject directory %s", path);
break;
default:
return error("git-checkout-index: unknown file mode for %s", path);
}

if (state->refresh_cache) {
struct stat st;
lstat(ce->name, &st);
fill_stat_cache_info(ce, &st);
}
return 0;
}

int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *topath)
{
static char path[PATH_MAX + 1];
struct stat st;
int len = state->base_dir_len;

if (topath)
return write_entry(ce, topath, state, 1);

memcpy(path, state->base_dir, len);
strcpy(path + len, ce->name);

if (!lstat(path, &st)) {
unsigned changed = ce_match_stat(ce, &st, 1);
if (!changed)
return 0;
if (!state->force) {
if (!state->quiet)
fprintf(stderr, "git-checkout-index: %s already exists\n", path);
return -1;
}

/*
* We unlink the old file, to get the new one with the
* right permissions (including umask, which is nasty
* to emulate by hand - much easier to let the system
* just do the right thing)
*/
unlink(path);
if (S_ISDIR(st.st_mode)) {
/* If it is a gitlink, leave it alone! */
if (S_ISDIRLNK(ntohl(ce->ce_mode)))
return 0;
if (!state->force)
return error("%s is a directory", path);
remove_subtree(path);
}
} else if (state->not_new)
return 0;
create_directories(path, state);
return write_entry(ce, path, state, 0);
}
Something went wrong with that request. Please try again.