status: allow --untracked=false and friends

It is natural to expect that the "--untracked" option and the
status.showuntrackedFiles configuration variable to take a Boolean
value ("do you want me to show untracked files?"), but the current
code takes nothing but "no" as "no, please do not show any".

Allow the usual Boolean values to be given, and treat 'true' as
"normal", and 'false' as "no".

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/config/status.txt

@@ -57,6 +57,8 @@ status.showUntrackedFiles::
 --
 +
 If this variable is not specified, it defaults to 'normal'.
+All usual spellings for Boolean value `true` are taken as `normal`
+and `false` as `no`.
 This variable can be overridden with the -u|--untracked-files option
 of linkgit:git-status[1] and linkgit:git-commit[1].
 

Documentation/git-commit.txt

@@ -347,6 +347,8 @@ The possible options are:
 	- 'normal' - Shows untracked files and directories
 	- 'all'    - Also shows individual files in untracked directories.
 
+All usual spellings for Boolean value `true` are taken as `normal`
+and `false` as `no`.
 The default can be changed using the status.showUntrackedFiles
 configuration variable documented in linkgit:git-config[1].
 --

Documentation/git-status.txt

@@ -79,6 +79,8 @@ Consider enabling untracked cache and split index if supported (see
 `git update-index --untracked-cache` and `git update-index
 --split-index`), Otherwise you can use `no` to have `git status`
 return more quickly without showing untracked files.
+All usual spellings for Boolean value `true` are taken as `normal`
+and `false` as `no`.
 
 The default can be changed using the status.showUntrackedFiles
 configuration variable documented in linkgit:git-config[1].

builtin/commit.c

@@ -1163,6 +1163,17 @@ static enum untracked_status_type parse_untracked_setting_name(const char *u)
 	 * Please update $__git_untracked_file_modes in
 	 * git-completion.bash when you add new options
 	 */
+	switch (git_parse_maybe_bool(u)) {
+	case 0:
+		u = "no";
+		break;
+	case 1:
+		u = "normal";
+		break;
+	default:
+		break;
+	}
+
 	if (!strcmp(u, "no"))
 		return SHOW_NO_UNTRACKED_FILES;
 	else if (!strcmp(u, "normal"))
@@ -1469,8 +1480,6 @@ static int git_status_config(const char *k, const char *v,
 	if (!strcmp(k, "status.showuntrackedfiles")) {
 		enum untracked_status_type u;
 
-		if (!v)
-			return config_error_nonbool(k);
 		u = parse_untracked_setting_name(v);
 		if (u == SHOW_UNTRACKED_FILES_ERROR)
 			return error(_("Invalid untracked files mode '%s'"), v);

t/t7508-status.sh

@@ -419,14 +419,19 @@ Changes not staged for commit:
 Untracked files not listed (use -u option to show untracked files)
 EOF
 	git status -uno >output &&
+	test_cmp expect output &&
+	git status -ufalse >output &&
 	test_cmp expect output
 '
 
-test_expect_success 'status (status.showUntrackedFiles no)' '
-	test_config status.showuntrackedfiles no &&
-	git status >output &&
-	test_cmp expect output
-'
+for no in no false 0
+do
+	test_expect_success "status (status.showUntrackedFiles $no)" '
+		test_config status.showuntrackedfiles "$no" &&
+		git status >output &&
+		test_cmp expect output
+	'
+done
 
 test_expect_success 'status -uno (advice.statusHints false)' '
 	cat >expect <<EOF &&
@@ -488,14 +493,21 @@ Untracked files:
 
 EOF
 	git status -unormal >output &&
+	test_cmp expect output &&
+	git status -utrue >output &&
+	test_cmp expect output &&
+	git status -uyes >output &&
 	test_cmp expect output
 '
 
-test_expect_success 'status (status.showUntrackedFiles normal)' '
-	test_config status.showuntrackedfiles normal &&
-	git status >output &&
-	test_cmp expect output
-'
+for normal in normal true 1
+do
+	test_expect_success "status (status.showUntrackedFiles $normal)" '
+		test_config status.showuntrackedfiles $normal &&
+		git status >output &&
+		test_cmp expect output
+	'
+done
 
 cat >expect <<EOF
  M dir1/modified