1 files changed, 304 insertions, 0 deletions
diff --git a/third_party/git/builtin/mv.c b/third_party/git/builtin/mv.c
new file mode 100644
index 000000000000..be15ba7044e0
--- /dev/null
+++ b/third_party/git/builtin/mv.c
@@ -0,0 +1,304 @@
+/*
+ * "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"
+
+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_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;
+}
+
+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;
+	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_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;
+	struct lock_file lock_file = LOCK_INIT;
+
+	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);
+	modes = xcalloc(argc, sizeof(enum update_mode));
+	/*
+	 * 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, 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)
+			continue;
+		if (mode != INDEX && 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)
+			continue;
+
+		pos = cache_name_pos(src, strlen(src));
+		assert(pos >= 0);
+		rename_cache_entry_at(pos, dst);
+	}
+
+	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"));
+
+	return 0;
+}