Allow checkout paths without specifying branch name

JGit CLI should allow to do this: checkout -- <path>

Currently, even if "a" is a valid path in the git repo, jgit CLI can't
checkout it:
$jgit checkout -- a
error: pathspec 'a' did not match any file(s) known to git.

The fix also fixes at same time "unnamed" zombie "[VAL ...]" argument
shown on the command line.

Before fix:
$jgit -h
jgit checkout name [VAL ...] [-- path ... ...] [--force (-f)] [--help
(-h)] [--orphan] [-b]

After fix:
$jgit -h
jgit checkout [name] [-- path ... ...] [--force (-f)] [--help (-h)]
[--orphan] [-b]

Bug: 475765
Change-Id: I2b0e77959a72e4aac68452dc3846adaa745b0831
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>

1 files changed, 13 insertions, 0 deletions

diff --git a/org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/lib/CLIRepositoryTestCase.java b/org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/lib/CLIRepositoryTestCase.java
index 559a6d5d40..4bdfa4d5bc 100644
--- a/org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/lib/CLIRepositoryTestCase.java
+++ b/org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/lib/CLIRepositoryTestCase.java
@@ -46,6 +46,7 @@ import static org.junit.Assert.assertEquals;
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -76,6 +77,18 @@ public class CLIRepositoryTestCase extends LocalDiskRepositoryTestCase {
 		return result.toArray(new String[0]);
 	}
 
+	/**
+	 * @param link
+	 *            the path of the symbolic link to create
+	 * @param target
+	 *            the target of the symbolic link
+	 * @return the path to the symbolic link
+	 * @throws Exception
+	 */
+	protected Path writeLink(String link, String target) throws Exception {
+		return JGitTestUtil.writeLink(db, link, target);
+	}
+
 	protected File writeTrashFile(final String name, final String data)
 			throws IOException {
 		return JGitTestUtil.writeTrashFile(db, name, data);