I am using gradle8.8 with java21.Passing an option value to custom doclet .like this options.addStringOption('outputdir','output') but when I run the task doclet is giving an error.error: invalid flag: -d 1 error Usage: javadoc [options] [packagenames] [sourcefiles] [@files] Is this a known error? the same works when I execute the doclet from terminal.

Unfortunately it seems Gradle is sending some options that the standard doclet supports but a custom doclet might not support: https://github.com/gradle/gradle/issues/11898 For some of these options, you can make sure to configure the options so that they are not sent. But I did not find a way to make it not send the

-d

option with the destination directory. So as a work-around you need to make the custom doclet accept that option, or if the doclet is not under your control make a separate doclet that accepts the option and ignores it and otherwise forwards the actual custom doclet. Probably the latter is cleaner as it is a quite Gradle-specific work-around, unless the doclet is anyway ever only used in Gradle builds.

Thank you.I could handle it inside Doclet and solved the problem(I am sending it in thread but not sure why it is going as a comon message