Restore AwtCredentialsProvider to enable debugging pgm in Eclipse

In 6c1f739388 the AWT based credentials
provider was dropped because we don't support Java 5 any longer so we
can always use the ConsoleCredentialsProvider which requires Java 6.
This broke debugging org.eclipse.jgit.pgm since Eclipse doesn't support
using a system console authenticator [1].

[1] see https://bugs.eclipse.org/bugs/show_bug.cgi?id=148831

Change-Id: Iba71001a7762e73d6579ba9dfa5a08ddaba777ea

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java

@@ -47,14 +47,15 @@ package org.eclipse.jgit.pgm;
 import java.io.File;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.lang.reflect.InvocationTargetException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.eclipse.jgit.console.ConsoleAuthenticator;
+import org.eclipse.jgit.awtui.AwtAuthenticator;
-import org.eclipse.jgit.console.ConsoleCredentialsProvider;
+import org.eclipse.jgit.awtui.AwtCredentialsProvider;
 import org.eclipse.jgit.errors.TransportException;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.lib.RepositoryBuilder;
@@ -115,8 +116,10 @@ public class Main {
 	 */
 	protected void run(final String[] argv) {
 		try {
-			ConsoleAuthenticator.install();
+			if (!installConsole()) {
-			ConsoleCredentialsProvider.install();
+				AwtAuthenticator.install();
+				AwtCredentialsProvider.install();
+			}
 			configureHttpProxy();
 			execute(argv);
 		} catch (Die err) {
@@ -246,6 +249,45 @@ public class Main {
 		return rb.build();
 	}
 
+	private static boolean installConsole() {
+		try {
+			install("org.eclipse.jgit.console.ConsoleAuthenticator"); //$NON-NLS-1$
+			install("org.eclipse.jgit.console.ConsoleCredentialsProvider"); //$NON-NLS-1$
+			return true;
+		} catch (ClassNotFoundException e) {
+			return false;
+		} catch (NoClassDefFoundError e) {
+			return false;
+		} catch (UnsupportedClassVersionError e) {
+			return false;
+
+		} catch (IllegalArgumentException e) {
+			throw new RuntimeException(CLIText.get().cannotSetupConsole, e);
+		} catch (SecurityException e) {
+			throw new RuntimeException(CLIText.get().cannotSetupConsole, e);
+		} catch (IllegalAccessException e) {
+			throw new RuntimeException(CLIText.get().cannotSetupConsole, e);
+		} catch (InvocationTargetException e) {
+			throw new RuntimeException(CLIText.get().cannotSetupConsole, e);
+		} catch (NoSuchMethodException e) {
+			throw new RuntimeException(CLIText.get().cannotSetupConsole, e);
+		}
+	}
+
+	private static void install(final String name)
+			throws IllegalAccessException, InvocationTargetException,
+			NoSuchMethodException, ClassNotFoundException {
+		try {
+		Class.forName(name).getMethod("install").invoke(null); //$NON-NLS-1$
+		} catch (InvocationTargetException e) {
+			if (e.getCause() instanceof RuntimeException)
+				throw (RuntimeException) e.getCause();
+			if (e.getCause() instanceof Error)
+				throw (Error) e.getCause();
+			throw e;
+		}
+	}
+
 	/**
 	 * Configure the JRE's standard HTTP based on <code>http_proxy</code>.
 	 * <p>

org.eclipse.jgit.ui/src/org/eclipse/jgit/awtui/AwtCredentialsProvider.java

@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2010, Google Inc.
+ * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
+ * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
+ * 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.awtui;
+
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JPasswordField;
+import javax.swing.JTextField;
+
+import org.eclipse.jgit.errors.UnsupportedCredentialItem;
+import org.eclipse.jgit.transport.CredentialItem;
+import org.eclipse.jgit.transport.CredentialsProvider;
+import org.eclipse.jgit.transport.URIish;
+
+/** Interacts with the user during authentication by using AWT/Swing dialogs. */
+public class AwtCredentialsProvider extends CredentialsProvider {
+	/** Install this implementation as the default. */
+	public static void install() {
+		CredentialsProvider.setDefault(new AwtCredentialsProvider());
+	}
+
+	@Override
+	public boolean isInteractive() {
+		return true;
+	}
+
+	@Override
+	public boolean supports(CredentialItem... items) {
+		for (CredentialItem i : items) {
+			if (i instanceof CredentialItem.StringType)
+				continue;
+
+			else if (i instanceof CredentialItem.CharArrayType)
+				continue;
+
+			else if (i instanceof CredentialItem.YesNoType)
+				continue;
+
+			else if (i instanceof CredentialItem.InformationalMessage)
+				continue;
+
+			else
+				return false;
+		}
+		return true;
+	}
+
+	@Override
+	public boolean get(URIish uri, CredentialItem... items)
+			throws UnsupportedCredentialItem {
+		if (items.length == 0) {
+			return true;
+
+		} else if (items.length == 1) {
+			final CredentialItem item = items[0];
+
+			if (item instanceof CredentialItem.InformationalMessage) {
+				JOptionPane.showMessageDialog(null, item.getPromptText(),
+						UIText.get().warning, JOptionPane.INFORMATION_MESSAGE);
+				return true;
+
+			} else if (item instanceof CredentialItem.YesNoType) {
+				CredentialItem.YesNoType v = (CredentialItem.YesNoType) item;
+				int r = JOptionPane.showConfirmDialog(null, v.getPromptText(),
+						UIText.get().warning, JOptionPane.YES_NO_OPTION);
+				switch (r) {
+				case JOptionPane.YES_OPTION:
+					v.setValue(true);
+					return true;
+
+				case JOptionPane.NO_OPTION:
+					v.setValue(false);
+					return true;
+
+				case JOptionPane.CANCEL_OPTION:
+				case JOptionPane.CLOSED_OPTION:
+				default:
+					return false;
+				}
+
+			} else {
+				return interactive(uri, items);
+			}
+
+		} else {
+			return interactive(uri, items);
+		}
+	}
+
+	private static boolean interactive(URIish uri, CredentialItem[] items) {
+		final GridBagConstraints gbc = new GridBagConstraints(0, 0, 1, 1, 1, 1,
+				GridBagConstraints.NORTHWEST, GridBagConstraints.NONE,
+				new Insets(0, 0, 0, 0), 0, 0);
+		final JPanel panel = new JPanel();
+		panel.setLayout(new GridBagLayout());
+
+		final JTextField[] texts = new JTextField[items.length];
+		for (int i = 0; i < items.length; i++) {
+			CredentialItem item = items[i];
+
+			if (item instanceof CredentialItem.StringType
+					|| item instanceof CredentialItem.CharArrayType) {
+				gbc.fill = GridBagConstraints.NONE;
+				gbc.gridwidth = GridBagConstraints.RELATIVE;
+				gbc.gridx = 0;
+				panel.add(new JLabel(item.getPromptText()), gbc);
+
+				gbc.fill = GridBagConstraints.HORIZONTAL;
+				gbc.gridwidth = GridBagConstraints.RELATIVE;
+				gbc.gridx = 1;
+				if (item.isValueSecure())
+					texts[i] = new JPasswordField(20);
+				else
+					texts[i] = new JTextField(20);
+				panel.add(texts[i], gbc);
+				gbc.gridy++;
+
+			} else if (item instanceof CredentialItem.InformationalMessage) {
+				gbc.fill = GridBagConstraints.NONE;
+				gbc.gridwidth = GridBagConstraints.REMAINDER;
+				gbc.gridx = 0;
+				panel.add(new JLabel(item.getPromptText()), gbc);
+				gbc.gridy++;
+
+			} else {
+				throw new UnsupportedCredentialItem(uri, item.getPromptText());
+			}
+		}
+
+		if (JOptionPane.showConfirmDialog(null, panel,
+				UIText.get().authenticationRequired,
+				JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE) != JOptionPane.OK_OPTION)
+			return false; // cancel
+
+		for (int i = 0; i < items.length; i++) {
+			CredentialItem item = items[i];
+			JTextField f = texts[i];
+
+			if (item instanceof CredentialItem.StringType) {
+				CredentialItem.StringType v = (CredentialItem.StringType) item;
+				if (f instanceof JPasswordField)
+					v.setValue(new String(((JPasswordField) f).getPassword()));
+				else
+					v.setValue(f.getText());
+
+			} else if (item instanceof CredentialItem.CharArrayType) {
+				CredentialItem.CharArrayType v = (CredentialItem.CharArrayType) item;
+				if (f instanceof JPasswordField)
+					v.setValueNoCopy(((JPasswordField) f).getPassword());
+				else
+					v.setValueNoCopy(f.getText().toCharArray());
+			}
+		}
+		return true;
+	}
+}