Check for write errors in standard out and exit with error

The underlying problem is that System.out is a PrintWriter and
as such it does not throw exceptions on error, but rather just
sets a flag and continues.

This changes replaces the use of System.out with a PrintWriter-like
writer that does not catch error, but instead throw them to the
caller.

Bug: 366243
Change-Id: I44405edc4416e943b87f09a0f6ed041c6c51b046

1 files changed, 171 insertions, 0 deletions

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/util/io/ThrowingPrintWriter.java b/org.eclipse.jgit/src/org/eclipse/jgit/util/io/ThrowingPrintWriter.java
new file mode 100644
index 0000000000..1c5c2b6b48
--- /dev/null
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/util/io/ThrowingPrintWriter.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2012, Robin Rosenberg <robin.rosenberg@dewire.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.io;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+import org.eclipse.jgit.util.SystemReader;
+
+/**
+ * An alternative PrintWriter that doesn't catch exceptions.
+ */
+public class ThrowingPrintWriter extends Writer {
+
+	private final Writer out;
+
+	private final String LF;
+
+	/**
+	 * Construct a JGitPrintWriter
+	 *
+	 * @param out
+	 *            the underlying {@link Writer}
+	 */
+	public ThrowingPrintWriter(Writer out) {
+		this.out = out;
+		LF = AccessController.doPrivileged(new PrivilegedAction<String>() {
+			public String run() {
+				return SystemReader.getInstance().getProperty("line.separator");
+			}
+		});
+	}
+
+	@Override
+	public void write(char[] cbuf, int off, int len) throws IOException {
+		out.write(cbuf, off, len);
+	}
+
+	@Override
+	public void flush() throws IOException {
+		out.flush();
+	}
+
+	@Override
+	public void close() throws IOException {
+		out.close();
+	}
+
+	/**
+	 * Print a string and terminate with a line feed.
+	 *
+	 * @param s
+	 * @throws IOException
+	 */
+	public void println(String s) throws IOException {
+		print(s + LF);
+	}
+
+	/**
+	 * Print a platform dependent new line
+	 *
+	 * @throws IOException
+	 */
+	public void println() throws IOException {
+		print(LF);
+	}
+
+	/**
+	 * Print a char
+	 *
+	 * @param value
+	 * @throws IOException
+	 */
+	public void print(char value) throws IOException {
+		print(String.valueOf(value));
+	}
+
+	/**
+	 * Print an int as string
+	 *
+	 * @param value
+	 * @throws IOException
+	 */
+	public void print(int value) throws IOException {
+		print(String.valueOf(value));
+	}
+
+	/**
+	 * Print a long as string
+	 *
+	 * @param value
+	 * @throws IOException
+	 */
+	public void print(long value) throws IOException {
+		print(String.valueOf(value));
+	}
+
+	/**
+	 * Print a short as string
+	 *
+	 * @param value
+	 * @throws IOException
+	 */
+	public void print(short value) throws IOException {
+		print(String.valueOf(value));
+	}
+
+	/**
+	 * Print a formatted message according to
+	 * {@link String#format(String, Object...)}.
+	 *
+	 * @param fmt
+	 * @param args
+	 * @throws IOException
+	 */
+	public void format(String fmt, Object... args) throws IOException {
+		print(String.format(fmt, args));
+	}
+
+	/**
+	 * Print an object's toString representations
+	 *
+	 * @param any
+	 * @throws IOException
+	 */
+	public void print(Object any) throws IOException {
+		out.write(String.valueOf(any));
+	}
+}