git/builtin-mv.c
Jonas Fonseca 83572c1a91 Use xrealloc instead of realloc
Change places that use realloc, without a proper error path, to instead use
xrealloc. Drop an erroneous error path in the daemon code that used errno
in the die message in favour of the simpler xrealloc.

Signed-off-by: Jonas Fonseca <fonseca@diku.dk>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-08-26 17:54:06 -07:00

293 lines
7.3 KiB
C

/*
* "git mv" builtin command
*
* Copyright (C) 2006 Johannes Schindelin
*/
#include <fnmatch.h>
#include "cache.h"
#include "builtin.h"
#include "dir.h"
#include "cache-tree.h"
#include "path-list.h"
static const char builtin_mv_usage[] =
"git-mv [-n] [-f] (<source> <destination> | [-k] <source>... <destination>)";
static const char **copy_pathspec(const char *prefix, const char **pathspec,
int count, int base_name)
{
int i;
const char **result = xmalloc((count + 1) * sizeof(const char *));
memcpy(result, pathspec, count * sizeof(const char *));
result[count] = NULL;
for (i = 0; i < count; i++) {
int length = strlen(result[i]);
if (length > 0 && result[i][length - 1] == '/') {
char *without_slash = xmalloc(length);
memcpy(without_slash, result[i], length - 1);
without_slash[length - 1] = '\0';
result[i] = without_slash;
}
if (base_name) {
const char *last_slash = strrchr(result[i], '/');
if (last_slash)
result[i] = last_slash + 1;
}
}
return get_pathspec(prefix, result);
}
static void show_list(const char *label, struct path_list *list)
{
if (list->nr > 0) {
int i;
printf("%s", label);
for (i = 0; i < list->nr; i++)
printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
putchar('\n');
}
}
static const char *add_slash(const char *path)
{
int len = strlen(path);
if (path[len - 1] != '/') {
char *with_slash = xmalloc(len + 2);
memcpy(with_slash, path, len);
with_slash[len++] = '/';
with_slash[len] = 0;
return with_slash;
}
return path;
}
static struct lock_file lock_file;
int cmd_mv(int argc, const char **argv, const char *prefix)
{
int i, newfd, count;
int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
const char **source, **destination, **dest_path;
enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
struct stat st;
struct path_list overwritten = {NULL, 0, 0, 0};
struct path_list src_for_dst = {NULL, 0, 0, 0};
struct path_list added = {NULL, 0, 0, 0};
struct path_list deleted = {NULL, 0, 0, 0};
struct path_list changed = {NULL, 0, 0, 0};
git_config(git_default_config);
newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
if (read_cache() < 0)
die("index file corrupt");
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (arg[0] != '-')
break;
if (!strcmp(arg, "--")) {
i++;
break;
}
if (!strcmp(arg, "-n")) {
show_only = 1;
continue;
}
if (!strcmp(arg, "-f")) {
force = 1;
continue;
}
if (!strcmp(arg, "-k")) {
ignore_errors = 1;
continue;
}
usage(builtin_mv_usage);
}
count = argc - i - 1;
if (count < 1)
usage(builtin_mv_usage);
source = copy_pathspec(prefix, argv + i, count, 0);
modes = xcalloc(count, sizeof(enum update_mode));
dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
if (dest_path[0][0] == '\0')
/* special case: "." was normalized to "" */
destination = copy_pathspec(dest_path[0], argv + i, count, 1);
else if (!lstat(dest_path[0], &st) &&
S_ISDIR(st.st_mode)) {
dest_path[0] = add_slash(dest_path[0]);
destination = copy_pathspec(dest_path[0], argv + i, count, 1);
} else {
if (count != 1)
usage(builtin_mv_usage);
destination = dest_path;
}
/* Checking */
for (i = 0; i < count; i++) {
const char *src = source[i], *dst = destination[i];
int length, src_is_dir;
const char *bad = NULL;
if (show_only)
printf("Checking rename of '%s' to '%s'\n", src, dst);
length = strlen(src);
if (lstat(src, &st) < 0)
bad = "bad source";
else if (!strncmp(src, dst, length) &&
(dst[length] == 0 || dst[length] == '/')) {
bad = "can not move directory into itself";
} else if ((src_is_dir = S_ISDIR(st.st_mode))
&& lstat(dst, &st) == 0)
bad = "cannot move directory over file";
else if (src_is_dir) {
int first, last;
modes[i] = WORKING_DIRECTORY;
first = cache_name_pos(src, length);
if (first >= 0)
die ("Huh? %s/ is in index?", src);
first = -1 - first;
for (last = first; last < active_nr; last++) {
const char *path = active_cache[last]->name;
if (strncmp(path, src, length)
|| path[length] != '/')
break;
}
if (last - first < 1)
bad = "source directory is empty";
else {
int j, dst_len;
if (last - first > 0) {
source = xrealloc(source,
(count + last - first)
* sizeof(char *));
destination = xrealloc(destination,
(count + last - first)
* sizeof(char *));
modes = xrealloc(modes,
(count + last - first)
* sizeof(enum update_mode));
}
dst = add_slash(dst);
dst_len = strlen(dst) - 1;
for (j = 0; j < last - first; j++) {
const char *path =
active_cache[first + j]->name;
source[count + j] = path;
destination[count + j] =
prefix_path(dst, dst_len,
path + length);
modes[count + j] = INDEX;
}
count += last - first;
}
} else if (lstat(dst, &st) == 0) {
bad = "destination exists";
if (force) {
/*
* only files can overwrite each other:
* check both source and destination
*/
if (S_ISREG(st.st_mode)) {
fprintf(stderr, "Warning: %s;"
" will overwrite!\n",
bad);
bad = NULL;
path_list_insert(dst, &overwritten);
} else
bad = "Cannot overwrite";
}
} else if (cache_name_pos(src, length) < 0)
bad = "not under version control";
else if (path_list_has_path(&src_for_dst, dst))
bad = "multiple sources for the same target";
else
path_list_insert(dst, &src_for_dst);
if (bad) {
if (ignore_errors) {
if (--count > 0) {
memmove(source + i, source + i + 1,
(count - i) * sizeof(char *));
memmove(destination + i,
destination + i + 1,
(count - i) * sizeof(char *));
}
} else
die ("%s, source=%s, destination=%s",
bad, src, dst);
}
}
for (i = 0; i < count; i++) {
const char *src = source[i], *dst = destination[i];
enum update_mode mode = modes[i];
if (show_only || verbose)
printf("Renaming %s to %s\n", src, dst);
if (!show_only && mode != INDEX &&
rename(src, dst) < 0 && !ignore_errors)
die ("renaming %s failed: %s", src, strerror(errno));
if (mode == WORKING_DIRECTORY)
continue;
if (cache_name_pos(src, strlen(src)) >= 0) {
path_list_insert(src, &deleted);
/* destination can be a directory with 1 file inside */
if (path_list_has_path(&overwritten, dst))
path_list_insert(dst, &changed);
else
path_list_insert(dst, &added);
} else
path_list_insert(dst, &added);
}
if (show_only) {
show_list("Changed : ", &changed);
show_list("Adding : ", &added);
show_list("Deleting : ", &deleted);
} else {
for (i = 0; i < changed.nr; i++) {
const char *path = changed.items[i].path;
int j = cache_name_pos(path, strlen(path));
struct cache_entry *ce = active_cache[j];
if (j < 0)
die ("Huh? Cache entry for %s unknown?", path);
refresh_cache_entry(ce, 0);
}
for (i = 0; i < added.nr; i++) {
const char *path = added.items[i].path;
add_file_to_index(path, verbose);
}
for (i = 0; i < deleted.nr; i++) {
const char *path = deleted.items[i].path;
remove_file_from_cache(path);
}
if (active_cache_changed) {
if (write_cache(newfd, active_cache, active_nr) ||
close(newfd) ||
commit_lock_file(&lock_file))
die("Unable to write new index file");
}
}
return 0;
}