Add a transform using lens for file.
excl specifies if the file is to be included (0) or excluded (1) from the lens. The lens may be a module name or a full lens name. If a module name is given, then lns will be the lens assumed.
lens |
lens name |
file |
file to transform |
excl |
include file if 0, exclude file if 1 |
1 on success, -1 on failure |