Merge branch 'js/windows-dotgit' into maint

On Windows, .git and optionally any files whose name starts with a
dot are now marked as hidden, with a core.hideDotFiles knob to
customize this behaviour.

* js/windows-dotgit:
  mingw: remove unnecessary definition
  mingw: introduce the 'core.hideDotFiles' setting

t/t0001-init.sh

@@ -354,4 +354,34 @@ test_expect_success SYMLINKS 're-init to move gitdir symlink' '
 	test_path_is_dir realgitdir/refs
 '
 
+# Tests for the hidden file attribute on windows
+is_hidden () {
+	# Use the output of `attrib`, ignore the absolute path
+	case "$(attrib "$1")" in *H*?:*) return 0;; esac
+	return 1
+}
+
+test_expect_success MINGW '.git hidden' '
+	rm -rf newdir &&
+	(
+		unset GIT_DIR GIT_WORK_TREE
+		mkdir newdir &&
+		cd newdir &&
+		git init &&
+		is_hidden .git
+	) &&
+	check_config newdir/.git false unset
+'
+
+test_expect_success MINGW 'bare git dir not hidden' '
+	rm -rf newdir &&
+	(
+		unset GIT_DIR GIT_WORK_TREE GIT_CONFIG
+		mkdir newdir &&
+		cd newdir &&
+		git --bare init
+	) &&
+	! is_hidden newdir
+'
+
 test_done

t/t5611-clone-config.sh

@@ -37,4 +37,24 @@ test_expect_success 'clone -c config is available during clone' '
 	test_cmp expect child/file
 '
 
+# Tests for the hidden file attribute on windows
+is_hidden () {
+	# Use the output of `attrib`, ignore the absolute path
+	case "$(attrib "$1")" in *H*?:*) return 0;; esac
+	return 1
+}
+
+test_expect_success MINGW 'clone -c core.hideDotFiles' '
+	test_commit attributes .gitattributes "" &&
+	rm -rf child &&
+	git clone -c core.hideDotFiles=false . child &&
+	! is_hidden child/.gitattributes &&
+	rm -rf child &&
+	git clone -c core.hideDotFiles=dotGitOnly . child &&
+	! is_hidden child/.gitattributes &&
+	rm -rf child &&
+	git clone -c core.hideDotFiles=true . child &&
+	is_hidden child/.gitattributes
+'
+
 test_done