builtin/mv.c - jrn/git - Git at Google

 /*
  * "git mv" builtin command
  *
  * Copyright (C) 2006 Johannes Schindelin
  */
 #include "builtin.h"
 #include "lockfile.h"
 #include "dir.h"
 #include "cache-tree.h"
 #include "string-list.h"
 #include "parse-options.h"
 #include "submodule.h"

 static const char * const builtin_mv_usage[] = {
 	N_("git mv [<options>] <source>... <destination>"),
 	NULL
 };

 #define DUP_BASENAME 1
 #define KEEP_TRAILING_SLASH 2

 static const char **internal_copy_pathspec(const char *prefix,
 					   const char **pathspec,
 					   int count, unsigned flags)
 {
 	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]);
 		int to_copy = length;
 		while (!(flags & KEEP_TRAILING_SLASH) &&
 		       to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
 			to_copy--;
 		if (to_copy != length || flags & DUP_BASENAME) {
 			char *it = xmemdupz(result[i], to_copy);
 			if (flags & DUP_BASENAME) {
 				result[i] = xstrdup(basename(it));
 				free(it);
 			} else
 				result[i] = it;
 		}
 	}
 	return get_pathspec(prefix, result);
 }

 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;
 #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())
 		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;
 }

 int cmd_mv(int argc, const char **argv, const char *prefix)
 {
 	int i, gitmodules_modified = 0;
 	int verbose = 0, show_only = 0, force = 0, ignore_errors = 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")),
 		OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
 		OPT_END(),
 	};
 	const char **source, **destination, **dest_path, **submodule_gitfile;
 	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
 	struct stat st;
 	struct string_list src_for_dst = STRING_LIST_INIT_NODUP;

 	gitmodules_config();
 	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, 1);
 	if (read_cache() < 0)
 		die(_("index file corrupt"));

 	source = internal_copy_pathspec(prefix, argv, argc, 0);
 	modes = xcalloc(argc, sizeof(enum update_mode));
 	/*
 	 * Keep trailing slash, needed to let
 	 * "git mv file no-such-dir/" error out.
 	 */
 	dest_path = internal_copy_pathspec(prefix, argv + argc, 1,
 					   KEEP_TRAILING_SLASH);
 	submodule_gitfile = xcalloc(argc, sizeof(char *));

 	if (dest_path[0][0] == '\0')
 		/* special case: "." was normalized to "" */
 		destination = internal_copy_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_copy_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, 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 = cache_name_pos(src, length), last;

 			if (first >= 0)
 				prepare_move_submodule(src, first,
 						       submodule_gitfile + i);
 			else if (index_range_of_same_dir(src, length,
 							 &first, &last) < 1)
 				bad = _("source directory is empty");
 			else { /* last - first >= 1 */
 				int j, dst_len, n;

 				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 char *path = active_cache[first + j]->name;
 					source[argc + j] = path;
 					destination[argc + j] =
 						prefix_path(dst, dst_len, path + length + 1);
 					modes[argc + j] = INDEX;
 					submodule_gitfile[argc + j] = NULL;
 				}
 				argc += last - first;
 			}
 		} else if (cache_name_pos(src, length) < 0)
 			bad = _("not under version control");
 		else 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");
 			}
 		} else if (string_list_has_string(&src_for_dst, dst))
 			bad = _("multiple sources for the same target");
 		else if (is_dir_sep(dst[strlen(dst) - 1]))
 			bad = _("destination directory does not exist");
 		else
 			string_list_insert(&src_for_dst, dst);

 		if (!bad)
 			continue;
 		if (!ignore_errors)
 			die(_("%s, source=%s, destination=%s"),
 			     bad, src, dst);
 		if (--argc > 0) {
 			int n = argc - i;
 			memmove(source + i, source + i + 1,
 				n * sizeof(char *));
 			memmove(destination + i, destination + i + 1,
 				n * sizeof(char *));
 			memmove(modes + i, modes + i + 1,
 				n * sizeof(enum update_mode));
 			memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
 				n * sizeof(char *));
 			i--;
 		}
 	}

 	for (i = 0; i < argc; i++) {
 		const char *src = source[i], *dst = destination[i];
 		enum update_mode mode = modes[i];
 		int pos;
 		if (show_only || verbose)
 			printf(_("Renaming %s to %s\n"), src, dst);
 		if (!show_only && mode != INDEX) {
 			if (rename(src, dst) < 0 && !ignore_errors)
 				die_errno(_("renaming '%s' failed"), src);
 			if (submodule_gitfile[i]) {
 				if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
 					connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
 				if (!update_path_in_gitmodules(src, dst))
 					gitmodules_modified = 1;
 			}
 		}

 		if (mode == WORKING_DIRECTORY)
 			continue;

 		pos = cache_name_pos(src, strlen(src));
 		assert(pos >= 0);
 		if (!show_only)
 			rename_cache_entry_at(pos, dst);
 	}

 	if (gitmodules_modified)
 		stage_updated_gitmodules();

 	if (active_cache_changed &&
 	    write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 		die(_("Unable to write new index file"));

 	return 0;
 }
	/*
	* "git mv" builtin command
	*
	* Copyright (C) 2006 Johannes Schindelin
	*/
	#include "builtin.h"
	#include "lockfile.h"
	#include "dir.h"
	#include "cache-tree.h"
	#include "string-list.h"
	#include "parse-options.h"
	#include "submodule.h"

	static const char * const builtin_mv_usage[] = {
	N_("git mv [<options>] <source>... <destination>"),
	NULL
	};

	#define DUP_BASENAME 1
	#define KEEP_TRAILING_SLASH 2

	static const char *internal_copy_pathspec(const char prefix,
	const char **pathspec,
	int count, unsigned flags)
	{
	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]);
	int to_copy = length;
	while (!(flags & KEEP_TRAILING_SLASH) &&
	to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
	to_copy--;
	if (to_copy != length \|\| flags & DUP_BASENAME) {
	char *it = xmemdupz(result[i], to_copy);
	if (flags & DUP_BASENAME) {
	result[i] = xstrdup(basename(it));
	free(it);
	} else
	result[i] = it;
	}
	}
	return get_pathspec(prefix, result);
	}

	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;
	#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())
	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;
	}

	int cmd_mv(int argc, const char *argv, const char prefix)
	{
	int i, gitmodules_modified = 0;
	int verbose = 0, show_only = 0, force = 0, ignore_errors = 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")),
	OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
	OPT_END(),
	};
	const char source, destination, dest_path, submodule_gitfile;
	enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
	struct stat st;
	struct string_list src_for_dst = STRING_LIST_INIT_NODUP;

	gitmodules_config();
	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, 1);
	if (read_cache() < 0)
	die(_("index file corrupt"));

	source = internal_copy_pathspec(prefix, argv, argc, 0);
	modes = xcalloc(argc, sizeof(enum update_mode));
	/*
	* Keep trailing slash, needed to let
	* "git mv file no-such-dir/" error out.
	*/
	dest_path = internal_copy_pathspec(prefix, argv + argc, 1,
	KEEP_TRAILING_SLASH);
	submodule_gitfile = xcalloc(argc, sizeof(char *));

	if (dest_path[0][0] == '\0')
	/* special case: "." was normalized to "" */
	destination = internal_copy_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_copy_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, 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 = cache_name_pos(src, length), last;

	if (first >= 0)
	prepare_move_submodule(src, first,
	submodule_gitfile + i);
	else if (index_range_of_same_dir(src, length,
	&first, &last) < 1)
	bad = _("source directory is empty");
	else { /* last - first >= 1 */
	int j, dst_len, n;

	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 char *path = active_cache[first + j]->name;
	source[argc + j] = path;
	destination[argc + j] =
	prefix_path(dst, dst_len, path + length + 1);
	modes[argc + j] = INDEX;
	submodule_gitfile[argc + j] = NULL;
	}
	argc += last - first;
	}
	} else if (cache_name_pos(src, length) < 0)
	bad = _("not under version control");
	else 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");
	}
	} else if (string_list_has_string(&src_for_dst, dst))
	bad = _("multiple sources for the same target");
	else if (is_dir_sep(dst[strlen(dst) - 1]))
	bad = _("destination directory does not exist");
	else
	string_list_insert(&src_for_dst, dst);

	if (!bad)
	continue;
	if (!ignore_errors)
	die(_("%s, source=%s, destination=%s"),
	bad, src, dst);
	if (--argc > 0) {
	int n = argc - i;
	memmove(source + i, source + i + 1,
	n * sizeof(char *));
	memmove(destination + i, destination + i + 1,
	n * sizeof(char *));
	memmove(modes + i, modes + i + 1,
	n * sizeof(enum update_mode));
	memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
	n * sizeof(char *));
	i--;
	}
	}

	for (i = 0; i < argc; i++) {
	const char src = source[i], dst = destination[i];
	enum update_mode mode = modes[i];
	int pos;
	if (show_only \|\| verbose)
	printf(_("Renaming %s to %s\n"), src, dst);
	if (!show_only && mode != INDEX) {
	if (rename(src, dst) < 0 && !ignore_errors)
	die_errno(_("renaming '%s' failed"), src);
	if (submodule_gitfile[i]) {
	if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
	connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
	if (!update_path_in_gitmodules(src, dst))
	gitmodules_modified = 1;
	}
	}

	if (mode == WORKING_DIRECTORY)
	continue;

	pos = cache_name_pos(src, strlen(src));
	assert(pos >= 0);
	if (!show_only)
	rename_cache_entry_at(pos, dst);
	}

	if (gitmodules_modified)
	stage_updated_gitmodules();

	if (active_cache_changed &&
	write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
	die(_("Unable to write new index file"));

	return 0;
	}