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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.lib.runtime;
import com.google.devtools.common.options.Option;
import com.google.devtools.common.options.OptionsBase;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* An annotation that lets blaze commands specify their options and their help.
* The annotations are processed by {@link BlazeCommand}.
*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface Command {
/**
* The name of the command, as the user would type it.
*/
String name();
/**
* Options processed by the command, indicated by options interfaces.
* These interfaces must contain methods annotated with {@link Option}.
*/
Class<? extends OptionsBase>[] options() default {};
/**
* The set of other Blaze commands that this annotation's command "inherits"
* options from. These classes must be annotated with {@link Command}.
*/
Class<? extends BlazeCommand>[] inherits() default {};
/**
* A short description, which appears in 'blaze help'.
*/
String shortDescription();
/**
* True if the configuration-specific options should be available for this command.
*/
boolean usesConfigurationOptions() default false;
/**
* True if the command runs a build.
*/
boolean builds() default false;
/**
* True if the command should not be shown in the output of 'blaze help'.
*/
boolean hidden() default false;
/**
* Specifies whether this command allows a residue after the parsed options.
* For example, a command might expect a list of targets to build in the
* residue.
*/
boolean allowResidue() default false;
/**
* Returns true if this command wants to write binary data to stdout.
* Enabling this flag will disable ANSI escape stripping for this command.
* This should be used in conjunction with {@code Reporter#switchToAnsiAllowingHandler}.
* See {@link RunCommand} for example usage.
*/
boolean binaryStdOut() default false;
/**
* Returns true if this command wants to write binary data to stderr.
* Enabling this flag will disable ANSI escape stripping for this command.
* This should be used in conjunction with {@code Reporter#switchToAnsiAllowingHandler}.
* See {@link RunCommand} for example usage.
*/
boolean binaryStdErr() default false;
/**
* Returns true if this command may want to write to the command.log.
*
* <p>The clean command would typically set this to false so it can delete the command.log.
*/
boolean writeCommandLog() default true;
/**
* The help message for this command. If the value starts with "resource:",
* the remainder is interpreted as the name of a text file resource (in the
* .jar file that provides the Command implementation class).
*/
String help();
/**
* Returns true iff this command may only be run from within a Blaze workspace. Broadly, this
* should be true for any command that interprets the package-path, since it's potentially
* confusing otherwise.
*/
boolean mustRunInWorkspace() default true;
/**
* Returns true iff this command is allowed to run in the output directory,
* i.e. $OUTPUT_BASE/_blaze_$USER/$MD5/... . No command should be allowed to run here,
* but there are some legacy uses of 'blaze query'.
*/
boolean canRunInOutputDirectory() default false;
/**
* Returns the type completion help for this command, that is the type arguments that this command
* expects. It can be a whitespace separated list if the command take several arguments. The type
* of each arguments can be <code>label</code>, <code>path</code>, <code>string</code>, ...
* It can also be a comma separated list of values, e.g. <code>{value1,value2}<code>. If a command
* accept several argument types, they can be combined with |, e.g <code>label|path</code>.
*/
String completion() default "";
}
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