pgm: add option if reflogs should be written when converting to reftable

Change-Id: Ie1c38121005965e63015d9a2af26a1caa88d73fa
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.pgm/resources/org/eclipse/jgit/pgm/internal/CLIText.properties

@@ -331,6 +331,7 @@ usage_configureTheServiceInDaemonServicename=configure the service in daemon.ser
 usage_convertRefStorage=Convert ref storage to reftable
 usage_convertRefStorageBackup=Create backup of old ref storage format
 usage_convertRefStorageFormat=Format to convert to (reftable or refdir)
+usage_convertRefStorageRefLogs=Write reflogs to reftable
 usage_createBranchAndCheckout=create branch and check out
 usage_deleteBranchEvenIfNotMerged=delete branch (even if not merged)
 usage_deleteFullyMergedBranch=delete fully merged branch

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/ConvertRefStorage.java

@@ -57,9 +57,13 @@ class ConvertRefStorage extends TextBuiltin {
 			"-b" }, usage = "usage_convertRefStorageBackup")
 	private boolean backup = true;
 
+	@Option(name = "--reflogs", handler = ExplicitBooleanOptionHandler.class, aliases = {
+			"-r" }, usage = "usage_convertRefStorageRefLogs")
+	private boolean writeLogs = true;
+
 	/** {@inheritDoc} */
 	@Override
 	protected void run() throws Exception {
-		((FileRepository) db).convertRefStorage(format, true, backup);
+		((FileRepository) db).convertRefStorage(format, writeLogs, backup);
 	}
 }