No Jira, added to usage msg the fact that the outputDirectory, if specified, will be erased at the start.
@@ -2928,6 +2928,7 @@ public class MigrateJCas extends VoidVisitorAdapter<Object> {
+ " [-classesRoots <One-or-more-directories-or-jars-or-pears-separated-by-Path-separator>]\n"
+ " [-outputDirectory a-writable-directory-path (optional)\n"
+ " if omitted, a temporary directory is used\n"
+ + " if not omitted, the directory contents WILL BE ERASED at the start.\n"
+ " [-migrateClasspath a-class-path to use in decompiling, when -classesRoots is specified\n"
+ " also used when compiling the migrated classes.\n"
+ " NOTE: either -sourcesRoots or -classesRoots is required, but only one may be specified.\n"
