/
Args4j.scala
62 lines (52 loc) · 1.9 KB
/
Args4j.scala
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/**
* Licensed to Big Data Genomics (BDG) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The BDG licenses this file
* to you 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 org.bdgenomics.adam.cli
import org.kohsuke.args4j.{ CmdLineException, CmdLineParser, Option }
import scala.collection.JavaConversions._
class Args4jBase {
@Option(name = "-h", aliases = Array("-help", "--help", "-?"), usage = "Print help")
var doPrintUsage: Boolean = false
}
object Args4j {
val helpOptions = Array("-h", "-help", "--help", "-?")
def apply[T <% Args4jBase: Manifest](args: Array[String], ignoreCmdLineExceptions: Boolean = false): T = {
val args4j: T = manifest[T].runtimeClass.asInstanceOf[Class[T]].newInstance()
val parser = new CmdLineParser(args4j)
parser.setUsageWidth(150);
def displayHelp(exitCode: Int = 0) = {
parser.printUsage(System.out)
System.exit(exitCode)
}
// Work around for help processing in Args4j
if (args.exists(helpOptions.contains(_))) {
displayHelp()
}
try {
parser.parseArgument(args.toList)
if (args4j.doPrintUsage)
displayHelp()
} catch {
case e: CmdLineException =>
if (!ignoreCmdLineExceptions) {
println(e.getMessage)
displayHelp(1)
}
}
args4j
}
}