55 lines
2.0 KiB
Java
55 lines
2.0 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.util.List;
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import java.util.ArrayList;
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public class PrintEnv {
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public static void main(String[] args) {
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List<String> lines = printArgs(args);
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lines.forEach(System.out::println);
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}
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private static List<String> printArgs(String[] args) {
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List<String> lines = new ArrayList<>();
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for (String arg : args) {
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if (arg.startsWith(PRINT_ENV_VAR)) {
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String name = arg.substring(PRINT_ENV_VAR.length());
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lines.add(name + "=" + System.getenv(name));
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} else if (arg.startsWith(PRINT_SYS_PROP)) {
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String name = arg.substring(PRINT_SYS_PROP.length());
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lines.add(name + "=" + System.getProperty(name));
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} else {
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throw new IllegalArgumentException();
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}
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}
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return lines;
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}
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private final static String PRINT_ENV_VAR = "--print-env-var=";
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private final static String PRINT_SYS_PROP = "--print-sys-prop=";
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}
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