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Groovy example source code file (HelpFormatter.groovy)
The Groovy HelpFormatter.groovy source code/* * Copyright 2003-2007 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. * 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.codehaus.groovy.tools.shell.util import jline.Terminal import org.apache.commons.cli.Options // // NOTE: Some code duplicated and augmented from commons-cli (1.0) sources to // properly render options w/arguments. // /** * Custom CLI help formatter to render things correctly. * * @version $Id: HelpFormatter.groovy 21140 2010-11-28 19:50:55Z hamletdrc $ * @author <a href="mailto:jason@planet57.com">Jason Dillon */ class HelpFormatter extends org.apache.commons.cli.HelpFormatter { HelpFormatter() { defaultLeftPad = 2 defaultDescPad = 4 } // Detect the terminal width late public int getDefaultWidth() { return Terminal.terminal.terminalWidth - 1 } protected StringBuffer renderOptions(final StringBuffer sb, final int width, final Options options, final int leftPad, final int descPad) { assert sb != null assert options List prefixes = [] String lpad = ' ' * leftPad List opts = options.shortOpts.values().sort { a, b -> return (a.opt == ' ' ? a.longOpt : a.opt) <=> (b.opt == ' ' ? b.longOpt : b.opt) } // Render the prefixes (-X,--xxxx muck) opts.each { option -> def buff = new StringBuffer(8) if (option.opt == ' ') { buff << "${lpad} ${defaultLongOptPrefix}${option.longOpt}" } else { buff << "${lpad}${defaultOptPrefix}${option.opt}" if (option.hasLongOpt()) { buff << ", ${defaultLongOptPrefix}${option.longOpt}" } } if (option.hasArg()) { if (option.hasArgName()) { if (option.hasOptionalArg()) { buff << "[=${option.argName}]" } else { buff << "=${option.argName}" } } else { buff << ' ' } } prefixes << buff } // Figure out how long the biggest prefix is int maxPrefix = prefixes.max { a, b -> a.size() <=> b.size() }.size() String dpad = ' ' * descPad // And then render each option's prefix with its description opts.eachWithIndex { option, i -> def buff = new StringBuffer(prefixes[i].toString()) if (buff.size() < maxPrefix) { buff << ' ' * (maxPrefix - buff.size()) } buff << dpad int nextLineTabStop = maxPrefix + descPad String text = buff << option.description renderWrappedText(sb, width, nextLineTabStop, text) if (i < opts.size() - 1) { sb << defaultNewLine } } return sb } } Other Groovy examples (source code examples)Here is a short list of links related to this Groovy HelpFormatter.groovy source code file: |
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