Prompt for passwords from the console in jgit command line tools

If we are on a Java 6 JVM we should have the Console class available,
unless the user has redirected /dev/null to stdin.  When there is a
console present we would prefer to use that for command line prompts
as that is what the user expects from a command line tool.

Change-Id: Ibaf87bb5540371d94d96d1b7e94ca002f752e5bd
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

2 files changed, 60 insertions, 2 deletions

diff --git a/org.eclipse.jgit.pgm/pom.xml b/org.eclipse.jgit.pgm/pom.xml
index 8f2312b85e..e06dbc2d02 100644
--- a/org.eclipse.jgit.pgm/pom.xml
+++ b/org.eclipse.jgit.pgm/pom.xml
@@ -77,6 +77,22 @@
     </dependency>
   </dependencies>
 
+  <profiles>
+    <profile>
+      <id>java6</id>
+      <activation>
+        <activeByDefault>true</activeByDefault>
+      </activation>
+      <dependencies>
+        <dependency>
+          <groupId>org.eclipse.jgit</groupId>
+          <artifactId>org.eclipse.jgit.console</artifactId>
+          <version>${project.version}</version>
+        </dependency>
+      </dependencies>
+    </profile>
+  </profiles>
+
   <build>
     <sourceDirectory>src/</sourceDirectory>
 
diff --git a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java
index 3579b65e31..18cf8be467 100644
--- a/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java
+++ b/org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Main.java
@@ -45,6 +45,7 @@
 package org.eclipse.jgit.pgm;
 
 import java.io.File;
+import java.lang.reflect.InvocationTargetException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.ArrayList;
@@ -88,8 +89,10 @@ public class Main {
 	public static void main(final String[] argv) {
 		final Main me = new Main();
 		try {
-			AwtAuthenticator.install();
-			AwtSshSessionFactory.install();
+			if (!installConsole()) {
+				AwtAuthenticator.install();
+				AwtSshSessionFactory.install();
+			}
 			configureHttpProxy();
 			me.execute(argv);
 		} catch (Die err) {
@@ -184,6 +187,45 @@ public class Main {
 		return null;
 	}
 
+	private static boolean installConsole() {
+		try {
+			install("org.eclipse.jgit.console.ConsoleAuthenticator");
+			install("org.eclipse.jgit.console.ConsoleSshSessionFactory");
+			return true;
+		} catch (ClassNotFoundException e) {
+			return false;
+		} catch (NoClassDefFoundError e) {
+			return false;
+		} catch (UnsupportedClassVersionError e) {
+			return false;
+
+		} catch (IllegalArgumentException e) {
+			throw new RuntimeException("Cannot setup console", e);
+		} catch (SecurityException e) {
+			throw new RuntimeException("Cannot setup console", e);
+		} catch (IllegalAccessException e) {
+			throw new RuntimeException("Cannot setup console", e);
+		} catch (InvocationTargetException e) {
+			throw new RuntimeException("Cannot setup console", e);
+		} catch (NoSuchMethodException e) {
+			throw new RuntimeException("Cannot setup console", e);
+		}
+	}
+
+	private static void install(final String name)
+			throws IllegalAccessException, InvocationTargetException,
+			NoSuchMethodException, ClassNotFoundException {
+		try {
+		Class.forName(name).getMethod("install").invoke(null);
+		} 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>