Don't log error if system git config does not exist

- enhance FS.readPipe to throw an exception if the external command
fails to enable the caller to handle the command failure
- reduce log level to warning if system git config does not exist
- improve log message 

Bug: 476639
Change-Id: I94ae3caec22150dde81f1ea8e1e665df55290d42
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/errors/CommandFailedException.java b/org.eclipse.jgit/src/org/eclipse/jgit/errors/CommandFailedException.java
new file mode 100644
index 0000000000..93749f5e43
--- /dev/null
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/errors/CommandFailedException.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2016, Matthias Sohn <matthias.sohn@sap.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.errors;
+
+/**
+ * Thrown when an external command failed
+ *
+ * @since 4.5
+ */
+public class CommandFailedException extends Exception {
+
+	private static final long serialVersionUID = 1L;
+
+	private int returnCode;
+
+	/**
+	 * @param returnCode
+	 *            return code returned by the command
+	 * @param message
+	 *            error message
+	 */
+	public CommandFailedException(int returnCode, String message) {
+		super(message);
+		this.returnCode = returnCode;
+	}
+
+	/**
+	 * @param returnCode
+	 *            return code returned by the command
+	 * @param message
+	 *            error message
+	 * @param cause
+	 *            exception causing this exception
+	 */
+	public CommandFailedException(int returnCode, String message,
+			Throwable cause) {
+		super(message, cause);
+		this.returnCode = returnCode;
+	}
+
+	/**
+	 * @return return code returned by the command
+	 */
+	public int getReturnCode() {
+		return returnCode;
+	}
+}