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org.jline.builtins.Options Maven / Gradle / Ivy
/*
* Copyright (c) 2002-2016, the original author or authors.
*
* This software is distributable under the BSD license. See the terms of the
* BSD license in the documentation provided with this software.
*
* http://www.opensource.org/licenses/bsd-license.php
*/
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.jline.builtins;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.function.Function;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Yet another GNU long options parser. This one is configured by parsing its Usage string.
*
* Code coming from Apache Felix Gogo Shell
*/
public class Options {
public static final String NL = System.getProperty("line.separator", "\n");
// Note: need to double \ within ""
private static final String regex = "(?x)\\s*" + "(?:-([^-]))?" + // 1: short-opt-1
"(?:,?\\s*-(\\w))?" + // 2: short-opt-2
"(?:,?\\s*--(\\w[\\w-]*)(=\\w+)?)?" + // 3: long-opt-1 and 4:arg-1
"(?:,?\\s*--(\\w[\\w-]*))?" + // 5: long-opt-2
".*?(?:\\(default=(.*)\\))?\\s*"; // 6: default
private static final int GROUP_SHORT_OPT_1 = 1;
private static final int GROUP_SHORT_OPT_2 = 2;
private static final int GROUP_LONG_OPT_1 = 3;
private static final int GROUP_ARG_1 = 4;
private static final int GROUP_LONG_OPT_2 = 5;
private static final int GROUP_DEFAULT = 6;
private final Pattern parser = Pattern.compile(regex);
private final Pattern uname = Pattern.compile("^Usage:\\s+(\\w+)");
private final Map unmodifiableOptSet;
private final Map unmodifiableOptArg;
private final Map optSet = new HashMap<>();
private final Map optArg = new HashMap<>();
private final Map optName = new HashMap<>();
private final Map optAlias = new HashMap<>();
private final List xargs = new ArrayList<>();
private List args = null;
private static final String UNKNOWN = "unknown";
private String usageName = UNKNOWN;
private int usageIndex = 0;
private final String[] spec;
private final String[] gspec;
private final String defOpts;
private final String[] defArgs;
private String error = null;
private boolean optionsFirst = false;
private boolean stopOnBadOption = false;
public static Options compile(String[] optSpec) {
return new Options(optSpec, null, null, System::getenv);
}
public static Options compile(String[] optSpec, Function env) {
return new Options(optSpec, null, null, env);
}
public static Options compile(String optSpec) {
return compile(optSpec.split("\\n"), System::getenv);
}
public static Options compile(String optSpec, Function env) {
return compile(optSpec.split("\\n"), env);
}
public static Options compile(String[] optSpec, Options gopt) {
return new Options(optSpec, null, gopt, System::getenv);
}
public static Options compile(String[] optSpec, String[] gspec) {
return new Options(optSpec, gspec, null, System::getenv);
}
public Options setStopOnBadOption(boolean stopOnBadOption) {
this.stopOnBadOption = stopOnBadOption;
return this;
}
public Options setOptionsFirst(boolean optionsFirst) {
this.optionsFirst = optionsFirst;
return this;
}
public boolean isSet(String name) {
if (!optSet.containsKey(name))
throw new IllegalArgumentException("option not defined in spec: " + name);
return optSet.get(name);
}
public Object getObject(String name) {
if (!optArg.containsKey(name))
throw new IllegalArgumentException("option not defined with argument: " + name);
List list = getObjectList(name);
return list.isEmpty() ? "" : list.get(list.size() - 1);
}
@SuppressWarnings("unchecked")
public List getObjectList(String name) {
List list;
Object arg = optArg.get(name);
if ( arg == null ) {
throw new IllegalArgumentException("option not defined with argument: " + name);
}
if (arg instanceof String) { // default value
list = new ArrayList<>();
if (!"".equals(arg))
list.add(arg);
}
else {
list = (List) arg;
}
return list;
}
public List getList(String name) {
ArrayList list = new ArrayList<>();
for (Object o : getObjectList(name)) {
try {
list.add((String) o);
} catch (ClassCastException e) {
throw new IllegalArgumentException("option not String: " + name);
}
}
return list;
}
@SuppressWarnings("unchecked")
private void addArg(String name, Object value) {
List list;
Object arg = optArg.get(name);
if (arg instanceof String) { // default value
list = new ArrayList<>();
optArg.put(name, list);
}
else {
list = (List) arg;
}
list.add(value);
}
public String get(String name) {
try {
return (String) getObject(name);
} catch (ClassCastException e) {
throw new IllegalArgumentException("option not String: " + name);
}
}
public int getNumber(String name) {
String number = get(name);
try {
if (number != null)
return Integer.parseInt(number);
return 0;
} catch (NumberFormatException e) {
throw new IllegalArgumentException("option '" + name + "' not Number: " + number);
}
}
public List argObjects() {
return xargs;
}
public List args() {
if (args == null) {
args = new ArrayList<>();
for (Object arg : xargs) {
args.add(arg == null ? "null" : arg.toString());
}
}
return args;
}
public void usage(PrintStream err) {
StringBuilder buf = new StringBuilder();
int index = 0;
if (error != null) {
buf.append(error);
buf.append(NL);
index = usageIndex;
}
for (int i = index; i < spec.length; ++i) {
buf.append(spec[i]);
buf.append(NL);
}
String msg = buf.toString();
err.print(msg);
}
/**
* prints usage message and returns IllegalArgumentException, for you to throw.
*/
public IllegalArgumentException usageError(String s) {
error = usageName + ": " + s;
return new IllegalArgumentException(error);
}
// internal constructor
private Options(String[] spec, String[] gspec, Options opt, Function env) {
this.gspec = gspec;
if (gspec == null && opt == null) {
this.spec = spec;
}
else {
ArrayList list = new ArrayList<>();
list.addAll(Arrays.asList(spec));
list.addAll(Arrays.asList(gspec != null ? gspec : opt.gspec));
this.spec = list.toArray(new String[list.size()]);
}
Map myOptSet = new HashMap<>();
Map myOptArg = new HashMap<>();
parseSpec(myOptSet, myOptArg);
if (opt != null) {
for (Entry e : opt.optSet.entrySet()) {
if (e.getValue())
myOptSet.put(e.getKey(), true);
}
for (Entry e : opt.optArg.entrySet()) {
if (!e.getValue().equals(""))
myOptArg.put(e.getKey(), e.getValue());
}
opt.reset();
}
unmodifiableOptSet = Collections.unmodifiableMap(myOptSet);
unmodifiableOptArg = Collections.unmodifiableMap(myOptArg);
defOpts = env != null ? env.apply(usageName.toUpperCase() + "_OPTS") : null;
defArgs = (defOpts != null) ? defOpts.split("\\s+") : new String[0];
}
/**
* parse option spec.
*/
private void parseSpec(Map myOptSet, Map myOptArg) {
int index = 0;
for (String line : spec) {
Matcher m = parser.matcher(line);
if (m.matches()) {
final String opt = m.group(GROUP_LONG_OPT_1);
final String name = (opt != null) ? opt : m.group(GROUP_SHORT_OPT_1);
if (name != null) {
if (myOptSet.containsKey(name))
throw new IllegalArgumentException("duplicate option in spec: --" + name);
myOptSet.put(name, false);
}
String dflt = (m.group(GROUP_DEFAULT) != null) ? m.group(GROUP_DEFAULT) : "";
if (m.group(GROUP_ARG_1) != null)
myOptArg.put(opt, dflt);
String opt2 = m.group(GROUP_LONG_OPT_2);
if (opt2 != null) {
optAlias.put(opt2, opt);
myOptSet.put(opt2, false);
if (m.group(GROUP_ARG_1) != null)
myOptArg.put(opt2, "");
}
for (int i = 0; i < 2; ++i) {
String sopt = m.group(i == 0 ? GROUP_SHORT_OPT_1 : GROUP_SHORT_OPT_2);
if (sopt != null) {
if (optName.containsKey(sopt))
throw new IllegalArgumentException("duplicate option in spec: -" + sopt);
optName.put(sopt, name);
}
}
}
if (Objects.equals(usageName, UNKNOWN)) {
Matcher u = uname.matcher(line);
if (u.find()) {
usageName = u.group(1);
usageIndex = index;
}
}
index++;
}
}
private void reset() {
optSet.clear();
optSet.putAll(unmodifiableOptSet);
optArg.clear();
optArg.putAll(unmodifiableOptArg);
xargs.clear();
args = null;
error = null;
}
public Options parse(Object[] argv) {
return parse(argv, false);
}
public Options parse(List argv) {
return parse(argv, false);
}
public Options parse(Object[] argv, boolean skipArg0) {
if (null == argv)
throw new IllegalArgumentException("argv is null");
return parse(Arrays.asList(argv), skipArg0);
}
public Options parse(List argv, boolean skipArg0) {
reset();
List args = new ArrayList<>();
args.addAll(Arrays.asList(defArgs));
for (Object arg : argv) {
if (skipArg0) {
skipArg0 = false;
usageName = arg.toString();
}
else {
args.add(arg);
}
}
String needArg = null;
String needOpt = null;
boolean endOpt = false;
for (Object oarg : args) {
String arg = oarg == null ? "null" : oarg.toString();
if (endOpt) {
xargs.add(oarg);
}
else if (needArg != null) {
addArg(needArg, oarg);
needArg = null;
needOpt = null;
}
else if (!arg.startsWith("-") || "-".equals(oarg)) {
if (optionsFirst)
endOpt = true;
xargs.add(oarg);
}
else {
if (arg.equals("--"))
endOpt = true;
else if (arg.startsWith("--")) {
int eq = arg.indexOf("=");
String value = (eq == -1) ? null : arg.substring(eq + 1);
String name = arg.substring(2, ((eq == -1) ? arg.length() : eq));
List names = new ArrayList<>();
if (optSet.containsKey(name)) {
names.add(name);
}
else {
for (String k : optSet.keySet()) {
if (k.startsWith(name))
names.add(k);
}
}
switch (names.size()) {
case 1:
name = names.get(0);
optSet.put(name, true);
if (optArg.containsKey(name)) {
if (value != null)
addArg(name, value);
else
needArg = name;
}
else if (value != null) {
throw usageError("option '--" + name + "' doesn't allow an argument");
}
break;
case 0:
if (stopOnBadOption) {
endOpt = true;
xargs.add(oarg);
break;
}
else
throw usageError("invalid option '--" + name + "'");
default:
throw usageError("option '--" + name + "' is ambiguous: " + names);
}
}
else {
for (int i = 1; i < arg.length(); i++) {
String c = String.valueOf(arg.charAt(i));
if (optName.containsKey(c)) {
String name = optName.get(c);
optSet.put(name, true);
if (optArg.containsKey(name)) {
int k = i + 1;
if (k < arg.length()) {
addArg(name, arg.substring(k));
}
else {
needOpt = c;
needArg = name;
}
break;
}
}
else {
if (stopOnBadOption) {
xargs.add("-" + c);
endOpt = true;
}
else
throw usageError("invalid option '" + c + "'");
}
}
}
}
}
if (needArg != null) {
String name = (needOpt != null) ? needOpt : "--" + needArg;
throw usageError("option '" + name + "' requires an argument");
}
// remove long option aliases
for (Entry alias : optAlias.entrySet()) {
if (optSet.get(alias.getKey())) {
optSet.put(alias.getValue(), true);
if (optArg.containsKey(alias.getKey()))
optArg.put(alias.getValue(), optArg.get(alias.getKey()));
}
optSet.remove(alias.getKey());
optArg.remove(alias.getKey());
}
return this;
}
@Override
public String toString() {
return "isSet" + optSet + "\nArg" + optArg + "\nargs" + xargs;
}
}
