git/builtin/mv.c
Junio C Hamano f01315ef7d Merge branch 'jc/builtin-mv-move-array'
Apply Coccinelle rule to turn raw memmove() into MOVE_ARRAY() cpp
macro, which would improve maintainability and readability.

* jc/builtin-mv-move-array:
  builtin/mv.c: use the MOVE_ARRAY() macro instead of memmove()
2022-07-18 13:31:53 -07:00

455 lines
12 KiB
C

/*
* "git mv" builtin command
*
* Copyright (C) 2006 Johannes Schindelin
*/
#define USE_THE_INDEX_COMPATIBILITY_MACROS
#include "builtin.h"
#include "config.h"
#include "pathspec.h"
#include "lockfile.h"
#include "dir.h"
#include "cache-tree.h"
#include "string-list.h"
#include "parse-options.h"
#include "submodule.h"
#include "entry.h"
static const char * const builtin_mv_usage[] = {
N_("git mv [<options>] <source>... <destination>"),
NULL
};
enum update_mode {
BOTH = 0,
WORKING_DIRECTORY = (1 << 1),
INDEX = (1 << 2),
SPARSE = (1 << 3),
SKIP_WORKTREE_DIR = (1 << 4),
};
#define DUP_BASENAME 1
#define KEEP_TRAILING_SLASH 2
static const char **internal_prefix_pathspec(const char *prefix,
const char **pathspec,
int count, unsigned flags)
{
int i;
const char **result;
int prefixlen = prefix ? strlen(prefix) : 0;
ALLOC_ARRAY(result, count + 1);
/* Create an intermediate copy of the pathspec based on the flags */
for (i = 0; i < count; i++) {
int length = strlen(pathspec[i]);
int to_copy = length;
char *it;
while (!(flags & KEEP_TRAILING_SLASH) &&
to_copy > 0 && is_dir_sep(pathspec[i][to_copy - 1]))
to_copy--;
it = xmemdupz(pathspec[i], to_copy);
if (flags & DUP_BASENAME) {
result[i] = xstrdup(basename(it));
free(it);
} else {
result[i] = it;
}
}
result[count] = NULL;
/* Prefix the pathspec and free the old intermediate strings */
for (i = 0; i < count; i++) {
const char *match = prefix_path(prefix, prefixlen, result[i]);
free((char *) result[i]);
result[i] = match;
}
return result;
}
static const char *add_slash(const char *path)
{
size_t len = strlen(path);
if (path[len - 1] != '/') {
char *with_slash = xmalloc(st_add(len, 2));
memcpy(with_slash, path, len);
with_slash[len++] = '/';
with_slash[len] = 0;
return with_slash;
}
return path;
}
#define SUBMODULE_WITH_GITDIR ((const char *)1)
static void prepare_move_submodule(const char *src, int first,
const char **submodule_gitfile)
{
struct strbuf submodule_dotgit = STRBUF_INIT;
if (!S_ISGITLINK(active_cache[first]->ce_mode))
die(_("Directory %s is in index and no submodule?"), src);
if (!is_staging_gitmodules_ok(&the_index))
die(_("Please stage your changes to .gitmodules or stash them to proceed"));
strbuf_addf(&submodule_dotgit, "%s/.git", src);
*submodule_gitfile = read_gitfile(submodule_dotgit.buf);
if (*submodule_gitfile)
*submodule_gitfile = xstrdup(*submodule_gitfile);
else
*submodule_gitfile = SUBMODULE_WITH_GITDIR;
strbuf_release(&submodule_dotgit);
}
static int index_range_of_same_dir(const char *src, int length,
int *first_p, int *last_p)
{
const char *src_w_slash = add_slash(src);
int first, last, len_w_slash = length + 1;
first = cache_name_pos(src_w_slash, len_w_slash);
if (first >= 0)
die(_("%.*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;
}
if (src_w_slash != src)
free((char *)src_w_slash);
*first_p = first;
*last_p = last;
return last - first;
}
/*
* Check if an out-of-cone directory should be in the index. Imagine this case
* that all the files under a directory are marked with 'CE_SKIP_WORKTREE' bit
* and thus the directory is sparsified.
*
* Return 0 if such directory exist (i.e. with any of its contained files not
* marked with CE_SKIP_WORKTREE, the directory would be present in working tree).
* Return 1 otherwise.
*/
static int check_dir_in_index(const char *name)
{
const char *with_slash = add_slash(name);
int length = strlen(with_slash);
int pos = cache_name_pos(with_slash, length);
const struct cache_entry *ce;
if (pos < 0) {
pos = -pos - 1;
if (pos >= the_index.cache_nr)
return 1;
ce = active_cache[pos];
if (strncmp(with_slash, ce->name, length))
return 1;
if (ce_skip_worktree(ce))
return 0;
}
return 1;
}
int cmd_mv(int argc, const char **argv, const char *prefix)
{
int i, flags, gitmodules_modified = 0;
int verbose = 0, show_only = 0, force = 0, ignore_errors = 0, ignore_sparse = 0;
struct option builtin_mv_options[] = {
OPT__VERBOSE(&verbose, N_("be verbose")),
OPT__DRY_RUN(&show_only, N_("dry run")),
OPT__FORCE(&force, N_("force move/rename even if target exists"),
PARSE_OPT_NOCOMPLETE),
OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
OPT_BOOL(0, "sparse", &ignore_sparse, N_("allow updating entries outside of the sparse-checkout cone")),
OPT_END(),
};
const char **source, **destination, **dest_path, **submodule_gitfile;
enum update_mode *modes;
struct stat st;
struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
struct lock_file lock_file = LOCK_INIT;
struct cache_entry *ce;
struct string_list only_match_skip_worktree = STRING_LIST_INIT_NODUP;
git_config(git_default_config, NULL);
argc = parse_options(argc, argv, prefix, builtin_mv_options,
builtin_mv_usage, 0);
if (--argc < 1)
usage_with_options(builtin_mv_usage, builtin_mv_options);
hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
if (read_cache() < 0)
die(_("index file corrupt"));
source = internal_prefix_pathspec(prefix, argv, argc, 0);
CALLOC_ARRAY(modes, argc);
/*
* Keep trailing slash, needed to let
* "git mv file no-such-dir/" error out, except in the case
* "git mv directory no-such-dir/".
*/
flags = KEEP_TRAILING_SLASH;
if (argc == 1 && is_directory(argv[0]) && !is_directory(argv[1]))
flags = 0;
dest_path = internal_prefix_pathspec(prefix, argv + argc, 1, flags);
submodule_gitfile = xcalloc(argc, sizeof(char *));
if (dest_path[0][0] == '\0')
/* special case: "." was normalized to "" */
destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
else if (!lstat(dest_path[0], &st) &&
S_ISDIR(st.st_mode)) {
dest_path[0] = add_slash(dest_path[0]);
destination = internal_prefix_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
} else {
if (argc != 1)
die(_("destination '%s' is not a directory"), dest_path[0]);
destination = dest_path;
}
/* Checking */
for (i = 0; i < argc; i++) {
const char *src = source[i], *dst = destination[i];
int length;
const char *bad = NULL;
int skip_sparse = 0;
if (show_only)
printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
length = strlen(src);
if (lstat(src, &st) < 0) {
int pos;
const struct cache_entry *ce;
pos = cache_name_pos(src, length);
if (pos < 0) {
const char *src_w_slash = add_slash(src);
if (!path_in_sparse_checkout(src_w_slash, &the_index) &&
!check_dir_in_index(src)) {
modes[i] |= SKIP_WORKTREE_DIR;
goto dir_check;
}
/* only error if existence is expected. */
if (!(modes[i] & SPARSE))
bad = _("bad source");
goto act_on_entry;
}
ce = active_cache[pos];
if (!ce_skip_worktree(ce)) {
bad = _("bad source");
goto act_on_entry;
}
if (!ignore_sparse) {
string_list_append(&only_match_skip_worktree, src);
goto act_on_entry;
}
/* Check if dst exists in index */
if (cache_name_pos(dst, strlen(dst)) < 0) {
modes[i] |= SPARSE;
goto act_on_entry;
}
if (!force) {
bad = _("destination exists");
goto act_on_entry;
}
modes[i] |= SPARSE;
goto act_on_entry;
}
if (!strncmp(src, dst, length) &&
(dst[length] == 0 || dst[length] == '/')) {
bad = _("can not move directory into itself");
goto act_on_entry;
}
if (S_ISDIR(st.st_mode)
&& lstat(dst, &st) == 0) {
bad = _("cannot move directory over file");
goto act_on_entry;
}
dir_check:
if (S_ISDIR(st.st_mode)) {
int j, dst_len, n;
int first = cache_name_pos(src, length), last;
if (first >= 0) {
prepare_move_submodule(src, first,
submodule_gitfile + i);
goto act_on_entry;
} else if (index_range_of_same_dir(src, length,
&first, &last) < 1) {
bad = _("source directory is empty");
goto act_on_entry;
}
/* last - first >= 1 */
modes[i] |= WORKING_DIRECTORY;
n = argc + last - first;
REALLOC_ARRAY(source, n);
REALLOC_ARRAY(destination, n);
REALLOC_ARRAY(modes, n);
REALLOC_ARRAY(submodule_gitfile, n);
dst = add_slash(dst);
dst_len = strlen(dst);
for (j = 0; j < last - first; j++) {
const struct cache_entry *ce = active_cache[first + j];
const char *path = ce->name;
source[argc + j] = path;
destination[argc + j] =
prefix_path(dst, dst_len, path + length + 1);
memset(modes + argc + j, 0, sizeof(enum update_mode));
modes[argc + j] |= ce_skip_worktree(ce) ? SPARSE : INDEX;
submodule_gitfile[argc + j] = NULL;
}
argc += last - first;
goto act_on_entry;
}
if (!(ce = cache_file_exists(src, length, 0))) {
bad = _("not under version control");
goto act_on_entry;
}
if (ce_stage(ce)) {
bad = _("conflicted");
goto act_on_entry;
}
if (lstat(dst, &st) == 0 &&
(!ignore_case || strcasecmp(src, dst))) {
bad = _("destination exists");
if (force) {
/*
* only files can overwrite each other:
* check both source and destination
*/
if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
if (verbose)
warning(_("overwriting '%s'"), dst);
bad = NULL;
} else
bad = _("Cannot overwrite");
}
goto act_on_entry;
}
if (string_list_has_string(&src_for_dst, dst)) {
bad = _("multiple sources for the same target");
goto act_on_entry;
}
if (is_dir_sep(dst[strlen(dst) - 1])) {
bad = _("destination directory does not exist");
goto act_on_entry;
}
/*
* We check if the paths are in the sparse-checkout
* definition as a very final check, since that
* allows us to point the user to the --sparse
* option as a way to have a successful run.
*/
if (!ignore_sparse &&
!path_in_sparse_checkout(src, &the_index)) {
string_list_append(&only_match_skip_worktree, src);
skip_sparse = 1;
}
if (!ignore_sparse &&
!path_in_sparse_checkout(dst, &the_index)) {
string_list_append(&only_match_skip_worktree, dst);
skip_sparse = 1;
}
if (skip_sparse)
goto remove_entry;
string_list_insert(&src_for_dst, dst);
act_on_entry:
if (!bad)
continue;
if (!ignore_errors)
die(_("%s, source=%s, destination=%s"),
bad, src, dst);
remove_entry:
if (--argc > 0) {
int n = argc - i;
MOVE_ARRAY(source + i, source + i + 1, n);
MOVE_ARRAY(destination + i, destination + i + 1, n);
MOVE_ARRAY(modes + i, modes + i + 1, n);
MOVE_ARRAY(submodule_gitfile + i,
submodule_gitfile + i + 1, n);
i--;
}
}
if (only_match_skip_worktree.nr) {
advise_on_updating_sparse_paths(&only_match_skip_worktree);
if (!ignore_errors)
return 1;
}
for (i = 0; i < argc; i++) {
const char *src = source[i], *dst = destination[i];
enum update_mode mode = modes[i];
int pos;
struct checkout state = CHECKOUT_INIT;
state.istate = &the_index;
if (force)
state.force = 1;
if (show_only || verbose)
printf(_("Renaming %s to %s\n"), src, dst);
if (show_only)
continue;
if (!(mode & (INDEX | SPARSE | SKIP_WORKTREE_DIR)) &&
rename(src, dst) < 0) {
if (ignore_errors)
continue;
die_errno(_("renaming '%s' failed"), src);
}
if (submodule_gitfile[i]) {
if (!update_path_in_gitmodules(src, dst))
gitmodules_modified = 1;
if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
connect_work_tree_and_git_dir(dst,
submodule_gitfile[i],
1);
}
if (mode & (WORKING_DIRECTORY | SKIP_WORKTREE_DIR))
continue;
pos = cache_name_pos(src, strlen(src));
assert(pos >= 0);
rename_cache_entry_at(pos, dst);
if ((mode & SPARSE) &&
(path_in_sparse_checkout(dst, &the_index))) {
int dst_pos;
dst_pos = cache_name_pos(dst, strlen(dst));
active_cache[dst_pos]->ce_flags &= ~CE_SKIP_WORKTREE;
if (checkout_entry(active_cache[dst_pos], &state, NULL, NULL))
die(_("cannot checkout %s"), active_cache[dst_pos]->name);
}
}
if (gitmodules_modified)
stage_updated_gitmodules(&the_index);
if (write_locked_index(&the_index, &lock_file,
COMMIT_LOCK | SKIP_IF_UNCHANGED))
die(_("Unable to write new index file"));
string_list_clear(&src_for_dst, 0);
UNLEAK(source);
UNLEAK(dest_path);
free(submodule_gitfile);
free(modes);
return 0;
}