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/*
* Copyright 2018 Google Inc. 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.turbine.main;
import static java.util.Objects.requireNonNull;
import com.google.common.base.Joiner;
/** A command-line usage error. */
class UsageException extends RuntimeException {
private static final String[] USAGE = {
"",
"Usage: turbine [options]",
"",
"Options:",
" --output",
" The jar output file.",
" --sources",
" The sources to compile.",
" --source_jars",
" jar archives of sources to compile.",
" --classpath",
" The compilation classpath.",
" --bootclasspath",
" The compilation bootclasspath.",
" --help",
" Print this usage statement.",
" @<filename>",
" Read options and filenames from file.",
"",
};
UsageException() {
super(buildMessage(null));
}
UsageException(String message) {
super(buildMessage(requireNonNull(message)));
}
private static String buildMessage(String message) {
StringBuilder builder = new StringBuilder();
if (message != null) {
builder.append(message).append('\n');
}
Joiner.on('\n').appendTo(builder, USAGE).append('\n');
return builder.toString();
}
}
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