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- /*
- * Copyright (C) 2009, Google Inc.
- * Copyright (C) 2009, Robin Rosenberg <robin.rosenberg@dewire.com>
- * Copyright (C) 2009, Yann Simon <yann.simon.fr@gmail.com>
- * Copyright (C) 2012, Daniel Megert <daniel_megert@ch.ibm.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.security.AccessController;
- import java.security.PrivilegedAction;
- import java.text.DateFormat;
- import java.text.SimpleDateFormat;
- import java.util.Locale;
- import java.util.TimeZone;
-
- import org.eclipse.jgit.storage.file.FileBasedConfig;
- import org.eclipse.jgit.lib.Config;
-
- /**
- * 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 DEFAULT = 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 openSystemConfig(Config parent, FS fs) {
- File prefix = fs.gitPrefix();
- if (prefix == null) {
- return new FileBasedConfig(null, fs) {
- public void load() {
- // empty, do not load
- }
-
- public boolean isOutdated() {
- // regular class would bomb here
- return false;
- }
- };
- }
- File etc = fs.resolve(prefix, "etc"); //$NON-NLS-1$
- File config = fs.resolve(etc, "gitconfig"); //$NON-NLS-1$
- return new FileBasedConfig(parent, config, fs);
- }
-
- public FileBasedConfig openUserConfig(Config parent, FS fs) {
- final File home = fs.userHome();
- return new FileBasedConfig(parent, new File(home, ".gitconfig"), fs); //$NON-NLS-1$
- }
-
- public String getHostname() {
- if (hostname == null) {
- try {
- InetAddress localMachine = InetAddress.getLocalHost();
- hostname = localMachine.getCanonicalHostName();
- } catch (UnknownHostException e) {
- // we do nothing
- hostname = "localhost"; //$NON-NLS-1$
- }
- assert hostname != null;
- }
- return hostname;
- }
-
- @Override
- public long getCurrentTime() {
- return System.currentTimeMillis();
- }
-
- @Override
- public int getTimezone(long when) {
- return getTimeZone().getOffset(when) / (60 * 1000);
- }
- };
-
- private static SystemReader INSTANCE = DEFAULT;
-
- /** @return the live instance to read system properties. */
- public static SystemReader getInstance() {
- return INSTANCE;
- }
-
- /**
- * @param newReader
- * the new instance to use when accessing properties, or null for
- * the default instance.
- */
- public static void setInstance(SystemReader newReader) {
- if (newReader == null)
- INSTANCE = DEFAULT;
- else
- 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);
-
- /**
- * @param parent
- * a config with values not found directly in the returned config
- * @param fs
- * the file system abstraction which will be necessary to perform
- * certain file system operations.
- * @return the git configuration found in the user home
- */
- public abstract FileBasedConfig openUserConfig(Config parent, FS fs);
-
- /**
- * @param parent
- * a config with values not found directly in the returned
- * config. Null is a reasonable value here.
- * @param fs
- * the file system abstraction which will be necessary to perform
- * certain file system operations.
- * @return the gitonfig configuration found in the system-wide "etc"
- * directory
- */
- public abstract FileBasedConfig openSystemConfig(Config parent, FS fs);
-
- /**
- * @return the current system time
- */
- public abstract long getCurrentTime();
-
- /**
- * @param when TODO
- * @return the local time zone
- */
- public abstract int getTimezone(long when);
-
- /**
- * @return system time zone, possibly mocked for testing
- * @since 1.2
- */
- public TimeZone getTimeZone() {
- return TimeZone.getDefault();
- }
-
- /**
- * @return the locale to use
- * @since 1.2
- */
- public Locale getLocale() {
- return Locale.getDefault();
- }
-
- /**
- * Returns a simple date format instance as specified by the given pattern.
- *
- * @param pattern
- * the pattern as defined in
- * {@link SimpleDateFormat#SimpleDateFormat(String)}
- * @return the simple date format
- * @since 2.0
- */
- public SimpleDateFormat getSimpleDateFormat(String pattern) {
- return new SimpleDateFormat(pattern);
- }
-
- /**
- * Returns a simple date format instance as specified by the given pattern.
- *
- * @param pattern
- * the pattern as defined in
- * {@link SimpleDateFormat#SimpleDateFormat(String)}
- * @param locale
- * locale to be used for the {@code SimpleDateFormat}
- * @return the simple date format
- * @since 3.2
- */
- public SimpleDateFormat getSimpleDateFormat(String pattern, Locale locale) {
- return new SimpleDateFormat(pattern, locale);
- }
-
- /**
- * Returns a date/time format instance for the given styles.
- *
- * @param dateStyle
- * the date style as specified in
- * {@link DateFormat#getDateTimeInstance(int, int)}
- * @param timeStyle
- * the time style as specified in
- * {@link DateFormat#getDateTimeInstance(int, int)}
- * @return the date format
- * @since 2.0
- */
- public DateFormat getDateTimeInstance(int dateStyle, int timeStyle) {
- return DateFormat.getDateTimeInstance(dateStyle, timeStyle);
- }
-
- /**
- * @return true if we are running on a Windows.
- */
- public boolean isWindows() {
- String osDotName = AccessController
- .doPrivileged(new PrivilegedAction<String>() {
- public String run() {
- return getProperty("os.name"); //$NON-NLS-1$
- }
- });
- return osDotName.startsWith("Windows"); //$NON-NLS-1$
- }
-
- /**
- * @return true if we are running on Mac OS X
- */
- public boolean isMacOS() {
- String osDotName = AccessController
- .doPrivileged(new PrivilegedAction<String>() {
- public String run() {
- return getProperty("os.name"); //$NON-NLS-1$
- }
- });
- return "Mac OS X".equals(osDotName) || "Darwin".equals(osDotName); //$NON-NLS-1$ //$NON-NLS-2$
- }
-
- }
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