| /* |
| * Copyright (C) 2009, Google Inc. |
| * Copyright (C) 2009, Robin Rosenberg <robin.rosenberg@dewire.com> |
| * Copyright (C) 2009, Yann Simon <yann.simon.fr@gmail.com> |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.eclipse.jgit.util; |
| |
| import java.io.File; |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.util.TimeZone; |
| |
| import org.eclipse.jgit.lib.FileBasedConfig; |
| |
| /** |
| * Interface to read values from the system. |
| * <p> |
| * When writing unit tests, extending this interface with a custom class |
| * permits to simulate an access to a system variable or property and |
| * permits to control the user's global configuration. |
| * </p> |
| */ |
| public abstract class SystemReader { |
| private static SystemReader INSTANCE = new SystemReader() { |
| private volatile String hostname; |
| |
| public String getenv(String variable) { |
| return System.getenv(variable); |
| } |
| |
| public String getProperty(String key) { |
| return System.getProperty(key); |
| } |
| |
| public FileBasedConfig openUserConfig() { |
| final File home = FS.userHome(); |
| return new FileBasedConfig(new File(home, ".gitconfig")); |
| } |
| |
| public String getHostname() { |
| if (hostname == null) { |
| try { |
| InetAddress localMachine = InetAddress.getLocalHost(); |
| hostname = localMachine.getCanonicalHostName(); |
| } catch (UnknownHostException e) { |
| // we do nothing |
| hostname = "localhost"; |
| } |
| assert hostname != null; |
| } |
| return hostname; |
| } |
| |
| @Override |
| public long getCurrentTime() { |
| return System.currentTimeMillis(); |
| } |
| |
| @Override |
| public int getTimezone(long when) { |
| return TimeZone.getDefault().getOffset(when) / (60 * 1000); |
| } |
| }; |
| |
| /** @return the live instance to read system properties. */ |
| public static SystemReader getInstance() { |
| return INSTANCE; |
| } |
| |
| /** |
| * @param newReader |
| * the new instance to use when accessing properties. |
| */ |
| public static void setInstance(SystemReader newReader) { |
| INSTANCE = newReader; |
| } |
| |
| /** |
| * Gets the hostname of the local host. If no hostname can be found, the |
| * hostname is set to the default value "localhost". |
| * |
| * @return the canonical hostname |
| */ |
| public abstract String getHostname(); |
| |
| /** |
| * @param variable system variable to read |
| * @return value of the system variable |
| */ |
| public abstract String getenv(String variable); |
| |
| /** |
| * @param key of the system property to read |
| * @return value of the system property |
| */ |
| public abstract String getProperty(String key); |
| |
| /** |
| * @return the git configuration found in the user home |
| */ |
| public abstract FileBasedConfig openUserConfig(); |
| |
| /** |
| * @return the current system time |
| */ |
| public abstract long getCurrentTime(); |
| |
| /** |
| * @param when TODO |
| * @return the local time zone |
| */ |
| public abstract int getTimezone(long when); |
| } |