Separate interactive and non-interactive commands

- Add new ShellContext concept which now is just a way
  to stash info about interaction mode where ShellRunner
  can update supported mode.
- ShellMethod has a new field interactionMode which user
  can use to define commands between interactive/non-interactive
  modes which then prevents CommandRegistry to show
  commands at runtime.
- Fixes #345

spring-shell-standard/src/main/java/org/springframework/shell/standard/ShellMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 the original author or authors.
+ * Copyright 2015-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,7 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.springframework.shell.standard;
 
 import java.lang.annotation.Documented;
@@ -22,6 +21,8 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
+import org.springframework.shell.context.InteractionMode;
+
 /**
  * Used to mark a method as invokable via Spring Shell.
  *
@@ -68,4 +69,14 @@ public @interface ShellMethod {
 	 */
 	String group() default INHERITED;
 
+	/**
+	 * Defines interaction mode for a command as a hint when command should be
+	 * available. For example presense of some commands doesn't make sense if shell
+	 * is running as non-interactive mode and vice versa.
+	 *
+	 * Defaults to {@link InteractionMode#ALL}
+	 *
+	 * @return interaction mode
+	 */
+	InteractionMode interactionMode() default InteractionMode.ALL;
 }

spring-shell-standard/src/main/java/org/springframework/shell/standard/StandardMethodTargetRegistrar.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2017 the original author or authors.
+ * Copyright 2015-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,7 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.springframework.shell.standard;
 
 import java.lang.reflect.Method;
@@ -76,7 +75,8 @@ public class StandardMethodTargetRegistrar implements MethodTargetRegistrar, App
 				String group = getOrInferGroup(method);
 				for (String key : keys) {
 					Supplier<Availability> availabilityIndicator = findAvailabilityIndicator(keys, bean, method);
-					MethodTarget target = new MethodTarget(method, bean, new Command.Help(shellMapping.value(), group), availabilityIndicator);
+					MethodTarget target = new MethodTarget(method, bean, new Command.Help(shellMapping.value(), group),
+							availabilityIndicator, shellMapping.interactionMode());
 					registry.register(key, target);
 					commands.put(key, target);
 				}