Simplify development of commands: added main() to CLIGitCommand

This will execute git commands (with arguments) specified on the command
line, handy for developing/debugging a sequence of arbitrary git
commands working on same repository.

The git working dir path can be specified via Java system property
"git_work_tree". If not specified, current directory will be used.

Change-Id: I621a9ec198c31e28a383818efeb4b3f835ba1d6f
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>

org.eclipse.jgit.pgm.test/META-INF/MANIFEST.MF

@@ -11,6 +11,7 @@ Import-Package: org.eclipse.jgit.api;version="[4.2.0,4.3.0)",
  org.eclipse.jgit.api.errors;version="[4.2.0,4.3.0)",
  org.eclipse.jgit.diff;version="[4.2.0,4.3.0)",
  org.eclipse.jgit.dircache;version="[4.2.0,4.3.0)",
+ org.eclipse.jgit.internal.storage.file;version="4.2.0",
  org.eclipse.jgit.junit;version="[4.2.0,4.3.0)",
  org.eclipse.jgit.lib;version="[4.2.0,4.3.0)",
  org.eclipse.jgit.merge;version="[4.2.0,4.3.0)",

org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/lib/CLIRepositoryTestCase.java

@@ -70,10 +70,20 @@ public class CLIRepositoryTestCase extends LocalDiskRepositoryTestCase {
 		trash = db.getWorkTree();
 	}
 
+	/**
+	 * Executes specified git commands (with arguments)
+	 *
+	 * @param cmds
+	 *            each string argument must be a valid git command line, e.g.
+	 *            "git branch -h"
+	 * @return command output
+	 * @throws Exception
+	 */
 	protected String[] execute(String... cmds) throws Exception {
 		List<String> result = new ArrayList<String>(cmds.length);
-		for (String cmd : cmds)
+		for (String cmd : cmds) {
 			result.addAll(CLIGitCommand.execute(cmd, db));
+		}
 		return result.toArray(new String[0]);
 	}
 

org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/pgm/CLIGitCommand.java

@@ -43,10 +43,12 @@
 package org.eclipse.jgit.pgm;
 
 import java.io.ByteArrayOutputStream;
+import java.io.File;
 import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.eclipse.jgit.internal.storage.file.FileRepository;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.pgm.internal.CLIText;
 import org.eclipse.jgit.pgm.opt.CmdLineParser;
@@ -69,6 +71,35 @@ public class CLIGitCommand {
 		return arguments;
 	}
 
+	/**
+	 * Executes git commands (with arguments) specified on the command line. The
+	 * git repository (same for all commands) can be specified via system
+	 * property "-Dgit_work_tree=path_to_work_tree". If the property is not set,
+	 * current directory is used.
+	 *
+	 * @param args
+	 *            each element in the array must be a valid git command line,
+	 *            e.g. "git branch -h"
+	 * @throws Exception
+	 */
+	public static void main(String[] args) throws Exception {
+		String workDir = System.getProperty("git_work_tree");
+		if (workDir == null) {
+			workDir = ".";
+			System.out.println(
+					"System property 'git_work_tree' not specified, using current directory: "
+							+ new File(workDir).getAbsolutePath());
+		}
+		try (Repository db = new FileRepository(workDir + "/.git")) {
+			for (String cmd : args) {
+				List<String> result = execute(cmd, db);
+				for (String line : result) {
+					System.out.println(line);
+				}
+			}
+		}
+	}
+
 	public static List<String> execute(String str, Repository db)
 			throws Exception {
 		try {

org.eclipse.jgit/META-INF/MANIFEST.MF

@@ -65,7 +65,7 @@ Export-Package: org.eclipse.jgit.annotations;version="4.2.0",
    org.eclipse.jgit.junit,
    org.eclipse.jgit.junit.http,
    org.eclipse.jgit.http.server,
-   org.eclipse.jgit.java7.test,
+   org.eclipse.jgit.pgm.test,
    org.eclipse.jgit.pgm",
  org.eclipse.jgit.internal.storage.pack;version="4.2.0";x-friends:="org.eclipse.jgit.junit,org.eclipse.jgit.test,org.eclipse.jgit.pgm",
  org.eclipse.jgit.lib;version="4.2.0";