org.eclipse.jkube.kit.common.util.CommandLine Maven / Gradle / Ivy
/**
* Copyright (c) 2019 Red Hat, Inc.
* This program and the accompanying materials are made
* available under the terms of the Eclipse Public License 2.0
* which is available at:
*
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Red Hat, Inc. - initial API and implementation
*/
package org.eclipse.jkube.kit.common.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.StringTokenizer;
// Inspired from org.apache.maven.shared.utils.cli.CommandLineUtils#translateCommandline()
// including a fixed for quoting
public class CommandLine implements Cloneable {
private CommandLine() { }
public static List translateCommandline(String toProcess) {
if (toProcess == null || toProcess.length() == 0) {
//no command? no string
return Collections.emptyList();
}
// parse with a simple finite state machine
final int normal = 0;
final int inQuote = 1;
final int inDoubleQuote = 2;
int state = normal;
final StringTokenizer tok = new StringTokenizer(toProcess, "\"\' ", true);
final ArrayList result = new ArrayList<>();
final StringBuilder current = new StringBuilder();
boolean lastTokenHasBeenQuoted = false;
while (tok.hasMoreTokens()) {
String nextTok = tok.nextToken();
switch (state) {
case inQuote:
if ("\'".equals(nextTok)) {
lastTokenHasBeenQuoted = true;
state = normal;
} else {
current.append(nextTok);
}
break;
case inDoubleQuote:
if ("\"".equals(nextTok)) {
lastTokenHasBeenQuoted = true;
state = normal;
} else {
current.append(nextTok);
}
break;
default:
if ("\'".equals(nextTok)) {
state = inQuote;
} else if ("\"".equals(nextTok)) {
state = inDoubleQuote;
} else if (" ".equals(nextTok)) {
if (lastTokenHasBeenQuoted || current.length() != 0) {
result.add(current.toString());
current.setLength(0);
}
} else {
current.append(nextTok);
}
lastTokenHasBeenQuoted = false;
break;
}
}
if (lastTokenHasBeenQuoted || current.length() != 0) {
result.add(current.toString());
}
if (state == inQuote || state == inDoubleQuote) {
throw new IllegalArgumentException("unbalanced quotes in " + toProcess);
}
return result;
}
}