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git-commit-vandalism/builtin-mv.c
Junio C Hamano fd1c3bf053 Rename add_file_to_index() to add_file_to_cache() 
This function was not called "add_file_to_cache()" only because
an ancient program, update-cache, used that name as an internal
function name that does something slightly different.  Now that
is gone, we can take over the better name.

The plan is to name all functions that operate on the default
index xxx_cache().  Later patches create a variant of them that
take an explicit parameter xxx_index(), and then turn
xxx_cache() functions into macros that use "the_index".

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-05 15:07:16 -07:00

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/*
* "git mv" builtin command
*
* Copyright (C) 2006 Johannes Schindelin
*/
#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) {
const char *src_w_slash = add_slash(src);
int len_w_slash = length + 1;
int first, last;
modes[i] = WORKING_DIRECTORY;
first = cache_name_pos(src_w_slash, len_w_slash);
if (first >= 0)
die ("Huh? %.*s is in index?",
len_w_slash, src_w_slash);
first = -1 - first;
for (last = first; last < active_nr; last++) {
const char *path = active_cache[last]->name;
if (strncmp(path, src_w_slash, len_w_slash))
break;
}
free((char *)src_w_slash);
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_cache(path, verbose);
}
for (i = 0; i < deleted.nr; i++) {
const char *path = deleted.items[i].path;
remove_file_from_cache(path);
cache_tree_invalidate_path(active_cache_tree, 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;
}
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