https://stackoverflow.com/questions/86049/how-do-i-ignore-files-in-subversion/86052
2015
https://codeyarns.com/2015/04/13/how-to-ignore-files-and-directories-in-svn/

svn pg svn:ignore .

svn ps
    svn ps svn:ignore "gradle.properties" .
    svn ps svn:ignore "platform.properties" .
    svn ps svn:ignore -F ignorelist .

    svn ps svn:ignore -R .build .
    svn ps svn:ignore -R -F ignorelist .
        .build
        build
        dist

        ... svn revert -R .