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author | Egil Moeller <egil.moller@freecode.no> | 2010-03-21 23:33:06 +0100 |
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committer | Egil Moeller <egil.moller@freecode.no> | 2010-03-21 23:33:06 +0100 |
commit | d56b9b3b82cdebcaeb00eec0fcb4326ad21adaa8 (patch) | |
tree | b1dfe31956f3fc86e3408f1efac5e12acf65b11a /infrastructure/net.appjet.common.cli/cli.scala | |
parent | c1894c8e0a52f4e3d2f89fa92f0066bbf0fcf1b1 (diff) | |
parent | 103d4926ae6c61824dc0b48be7bf66f08830ed47 (diff) | |
download | etherpad-d56b9b3b82cdebcaeb00eec0fcb4326ad21adaa8.tar.gz etherpad-d56b9b3b82cdebcaeb00eec0fcb4326ad21adaa8.tar.bz2 etherpad-d56b9b3b82cdebcaeb00eec0fcb4326ad21adaa8.zip |
Merge branch 'master' of git@github.com:ether/pad
Diffstat (limited to 'infrastructure/net.appjet.common.cli/cli.scala')
-rw-r--r-- | infrastructure/net.appjet.common.cli/cli.scala | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/infrastructure/net.appjet.common.cli/cli.scala b/infrastructure/net.appjet.common.cli/cli.scala new file mode 100644 index 0000000..ef9223f --- /dev/null +++ b/infrastructure/net.appjet.common.cli/cli.scala @@ -0,0 +1,56 @@ +/** + * Copyright 2009 Google Inc. + * + * 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 net.appjet.common.cli; + +import org.apache.commons.lang.WordUtils; + +class CliOption(val name: String, val description: String, val argName: Option[String]); + +class ParseException(message: String) extends RuntimeException(message); + +class CliParser(predef: Array[CliOption]) { + val displayWidth = 80; + val options = Map((for (opt <- predef) yield ((opt.name, opt))): _*); + + def parseOptions(args0: Array[String]): (Map[String, String], Array[String]) = { + val (opts, args) = args0.partition(_.startsWith("-")); + (Map((for (arg <- opts) yield { + val parts = arg.split("=", 2); + val name = "-+".r.replaceFirstIn(parts(0), ""); + if (parts.length == 1 && options.get(name).map(_.argName.isDefined).exists(x => x)) + throw new ParseException("Missing argument for flag: "+name); + (name, parts.orElse(Map(1 -> "true"))(1)); + }): _*), + args.toArray); + } + + def dprint(prefix: String, value: String) = { +// println(prefix+": "+value+"\n"); + value; + } + + def usage = { + val sb = new StringBuilder(); + var maxLength = predef.map(opt => 2 + opt.name.length + opt.argName.map(_.length + 1).getOrElse(0) ).reduceRight(Math.max)+2; + for ((n, opt) <- options) { + sb.append(" --"+n+opt.argName.map("=<"+_+">").getOrElse("")+"\n"); + sb.append(" "+WordUtils.wrap(opt.description, displayWidth-5).split("\n").mkString("\n ")); + sb.append("\n\n"); + } + sb.toString(); + } +} |