git add: -u/-A now affects the entire working tree

As promised in 0fa2eb530f (add: warn when -u or -A is used without
pathspec, 2013-01-28), in Git 2.0, "git add -u/-A" that is run
without pathspec in a subdirectory updates all updated paths in the
entire working tree, not just the current directory and its
subdirectories.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-add.txt

@@ -104,10 +104,10 @@ apply to the index. See EDITING PATCHES below.
 	<pathspec>.  This removes as well as modifies index entries to
 	match the working tree, but adds no new files.
 +
-If no <pathspec> is given, the current version of Git defaults to
-"."; in other words, update all tracked files in the current directory
-and its subdirectories. This default will change in a future version
-of Git, hence the form without <pathspec> should not be used.
+If no <pathspec> is given when `-u` option is used, all
+tracked files in the entire working tree are updated (old versions
+of Git used to limit the update to the current directory and its
+subdirectories).
 
 -A::
 --all::
@@ -117,10 +117,10 @@ of Git, hence the form without <pathspec> should not be used.
 	entry.	This adds, modifies, and removes index entries to
 	match the working tree.
 +
-If no <pathspec> is given, the current version of Git defaults to
-"."; in other words, update all files in the current directory
-and its subdirectories. This default will change in a future version
-of Git, hence the form without <pathspec> should not be used.
+If no <pathspec> is given when `-A` option is used, all
+files in the entire working tree are updated (old versions
+of Git used to limit the update to the current directory and its
+subdirectories).
 
 --no-all::
 --ignore-removal::

builtin/add.c

@@ -26,55 +26,10 @@ static int take_worktree_changes;
 struct update_callback_data {
 	int flags;
 	int add_errors;
-	const char *implicit_dot;
-	size_t implicit_dot_len;
-
 	/* only needed for 2.0 transition preparation */
 	int warn_add_would_remove;
 };
 
-static const char *option_with_implicit_dot;
-static const char *short_option_with_implicit_dot;
-
-static void warn_pathless_add(void)
-{
-	static int shown;
-	assert(option_with_implicit_dot && short_option_with_implicit_dot);
-
-	if (shown)
-		return;
-	shown = 1;
-
-	/*
-	 * To be consistent with "git add -p" and most Git
-	 * commands, we should default to being tree-wide, but
-	 * this is not the original behavior and can't be
-	 * changed until users trained themselves not to type
-	 * "git add -u" or "git add -A". For now, we warn and
-	 * keep the old behavior. Later, the behavior can be changed
-	 * to tree-wide, keeping the warning for a while, and
-	 * eventually we can drop the warning.
-	 */
-	warning(_("The behavior of 'git add %s (or %s)' with no path argument from a\n"
-		  "subdirectory of the tree will change in Git 2.0 and should not be used anymore.\n"
-		  "To add content for the whole tree, run:\n"
-		  "\n"
-		  "  git add %s :/\n"
-		  "  (or git add %s :/)\n"
-		  "\n"
-		  "To restrict the command to the current directory, run:\n"
-		  "\n"
-		  "  git add %s .\n"
-		  "  (or git add %s .)\n"
-		  "\n"
-		  "With the current Git version, the command is restricted to "
-		  "the current directory.\n"
-		  ""),
-		option_with_implicit_dot, short_option_with_implicit_dot,
-		option_with_implicit_dot, short_option_with_implicit_dot,
-		option_with_implicit_dot, short_option_with_implicit_dot);
-}
-
 static int fix_unmerged_status(struct diff_filepair *p,
 			       struct update_callback_data *data)
 {
@@ -119,26 +74,10 @@ static void update_callback(struct diff_queue_struct *q,
 {
 	int i;
 	struct update_callback_data *data = cbdata;
-	const char *implicit_dot = data->implicit_dot;
-	size_t implicit_dot_len = data->implicit_dot_len;
 
 	for (i = 0; i < q->nr; i++) {
 		struct diff_filepair *p = q->queue[i];
 		const char *path = p->one->path;
-		/*
-		 * Check if "git add -A" or "git add -u" was run from a
-		 * subdirectory with a modified file outside that directory,
-		 * and warn if so.
-		 *
-		 * "git add -u" will behave like "git add -u :/" instead of
-		 * "git add -u ." in the future.  This warning prepares for
-		 * that change.
-		 */
-		if (implicit_dot &&
-		    strncmp_icase(path, implicit_dot, implicit_dot_len)) {
-			warn_pathless_add();
-			continue;
-		}
 		switch (fix_unmerged_status(p, data)) {
 		default:
 			die(_("unexpected diff status %c"), p->status);
@@ -191,9 +130,7 @@ int add_files_to_cache(const char *prefix, const char **pathspec, int flags)
 	return !!data.add_errors;
 }
 
-#define WARN_IMPLICIT_DOT (1u << 0)
-static char *prune_directory(struct dir_struct *dir, const char **pathspec,
-			     int prefix, unsigned flag)
+static char *prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
 {
 	char *seen;
 	int i, specs;
@@ -210,16 +147,6 @@ static char *prune_directory(struct dir_struct *dir, const char **pathspec,
 		if (match_pathspec(pathspec, entry->name, entry->len,
 				   prefix, seen))
 			*dst++ = entry;
-		else if (flag & WARN_IMPLICIT_DOT)
-			/*
-			 * "git add -A" was run from a subdirectory with a
-			 * new file outside that directory.
-			 *
-			 * "git add -A" will behave like "git add -A :/"
-			 * instead of "git add -A ." in the future.
-			 * Warn about the coming behavior change.
-			 */
-			warn_pathless_add();
 	}
 	dir->nr = dst - dir->entries;
 	add_pathspec_matches_against_index(pathspec, seen, specs);
@@ -451,7 +378,6 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 	int add_new_files;
 	int require_pathspec;
 	char *seen = NULL;
-	int implicit_dot = 0;
 	struct update_callback_data update_data;
 
 	git_config(add_config, NULL);
@@ -493,19 +419,11 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
 	if (!show_only && ignore_missing)
 		die(_("Option --ignore-missing can only be used together with --dry-run"));
-	if (addremove) {
-		option_with_implicit_dot = "--all";
-		short_option_with_implicit_dot = "-A";
-	}
-	if (take_worktree_changes) {
-		option_with_implicit_dot = "--update";
-		short_option_with_implicit_dot = "-u";
-	}
-	if (option_with_implicit_dot && !argc) {
-		static const char *here[2] = { ".", NULL };
+
+	if ((addremove || take_worktree_changes) && !argc) {
+		static const char *whole[2] = { ":/", NULL };
 		argc = 1;
-		argv = here;
-		implicit_dot = 1;
+		argv = whole;
 	}
 
 	add_new_files = !take_worktree_changes && !refresh_only;
@@ -518,8 +436,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 		 (intent_to_add ? ADD_CACHE_INTENT : 0) |
 		 (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
 		 (!(addremove || take_worktree_changes)
-		  ? ADD_CACHE_IGNORE_REMOVAL : 0)) |
-		 (implicit_dot ? ADD_CACHE_IMPLICIT_DOT : 0);
+		  ? ADD_CACHE_IGNORE_REMOVAL : 0));
 
 	if (require_pathspec && argc == 0) {
 		fprintf(stderr, _("Nothing specified, nothing added.\n"));
@@ -543,18 +460,15 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 		}
 
 		/* This picks up the paths that are not tracked */
-		baselen = fill_directory(&dir, implicit_dot ? NULL : pathspec);
+		baselen = fill_directory(&dir, pathspec);
 		if (pathspec)
-			seen = prune_directory(&dir, pathspec, baselen,
-					implicit_dot ? WARN_IMPLICIT_DOT : 0);
+			seen = prune_directory(&dir, pathspec, baselen);
 	}
 
 	if (refresh_only) {
 		refresh(verbose, pathspec);
 		goto finish;
 	}
-	if (implicit_dot && prefix)
-		refresh_cache(REFRESH_QUIET);
 
 	if (pathspec) {
 		int i;
@@ -578,17 +492,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
 
 	plug_bulk_checkin();
 
-	if ((flags & ADD_CACHE_IMPLICIT_DOT) && prefix) {
-		/*
-		 * Check for modified files throughout the worktree so
-		 * update_callback has a chance to warn about changes
-		 * outside the cwd.
-		 */
-		update_data.implicit_dot = prefix;
-		update_data.implicit_dot_len = strlen(prefix);
-		pathspec = NULL;
-	}
-	update_data.flags = flags & ~ADD_CACHE_IMPLICIT_DOT;
+	update_data.flags = flags;
 	update_files_in_cache(prefix, pathspec, &update_data);
 
 	exit_status |= !!update_data.add_errors;

cache.h

@@ -466,7 +466,6 @@ extern int remove_file_from_index(struct index_state *, const char *path);
 #define ADD_CACHE_IGNORE_ERRORS	4
 #define ADD_CACHE_IGNORE_REMOVAL 8
 #define ADD_CACHE_INTENT 16
-#define ADD_CACHE_IMPLICIT_DOT 32	/* internal to "git add -u/-A" */
 extern int add_to_index(struct index_state *, const char *path, struct stat *, int flags);
 extern int add_file_to_index(struct index_state *, const char *path, int flags);
 extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);

t/t2200-add-update.sh

@@ -80,18 +80,13 @@ test_expect_success 'change gets noticed' '
 
 '
 
-# Note that this is scheduled to change in Git 2.0, when
-# "git add -u" will become full-tree by default.
-test_expect_success 'non-limited update in subdir leaves root alone' '
+test_expect_success 'non-qualified update in subdir updates from the root' '
 	(
 		cd dir1 &&
 		echo even more >>sub2 &&
 		git add -u
 	) &&
-	cat >expect <<-\EOF &&
-	check
-	top
-	EOF
+	: >expect &&
 	git diff-files --name-only >actual &&
 	test_cmp expect actual
 '