Add Command Line Interface (#525)

1 files changed, 66 insertions, 0 deletions

diff --git a/org.jacoco.cli/src/org/jacoco/cli/internal/commands/Merge.java b/org.jacoco.cli/src/org/jacoco/cli/internal/commands/Merge.java
new file mode 100644
index 00000000..d4262abc
--- /dev/null
+++ b/org.jacoco.cli/src/org/jacoco/cli/internal/commands/Merge.java
@@ -0,0 +1,66 @@
+/*******************************************************************************
+ * Copyright (c) 2009, 2017 Mountainminds GmbH & Co. KG and Contributors
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Marc R. Hoffmann - initial API and implementation
+ *
+ *******************************************************************************/
+package org.jacoco.cli.internal.commands;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.jacoco.cli.internal.Command;
+import org.jacoco.core.tools.ExecFileLoader;
+import org.kohsuke.args4j.Argument;
+import org.kohsuke.args4j.Option;
+
+/**
+ * The <code>merge</code> command.
+ */
+public class Merge extends Command {
+
+	@Argument(usage = "list of JaCoCo *.exec files to read", metaVar = "<execfiles>")
+	List<File> execfiles = new ArrayList<File>();
+
+	@Option(name = "--destfile", usage = "file to write merged execution data to", metaVar = "<path>", required = true)
+	File destfile;
+
+	@Override
+	public String description() {
+		return "Merges multiple exec files into a new one.";
+	}
+
+	@Override
+	public int execute(final PrintWriter out, final PrintWriter err)
+			throws IOException {
+		final ExecFileLoader loader = loadExecutionData(out);
+		out.printf("[INFO] Writing execution data to %s.%n",
+				destfile.getAbsolutePath());
+		loader.save(destfile, true);
+		return 0;
+	}
+
+	private ExecFileLoader loadExecutionData(final PrintWriter out)
+			throws IOException {
+		final ExecFileLoader loader = new ExecFileLoader();
+		if (execfiles.isEmpty()) {
+			out.println("[WARN] No execution data files provided.");
+		} else {
+			for (final File file : execfiles) {
+				out.printf("[INFO] Loading execution data file %s.%n",
+						file.getAbsolutePath());
+				loader.load(file);
+			}
+		}
+		return loader;
+	}
+
+}