It uses a simple rules without the need to use complex regexes. It is
not as powerful as the existing approaches so both are complementary.
For example, this:
foo/bar (.*)app-crypt/pinentry(.*)\[gtk\] \1app-crypt/pinentry-gtk2\2
expresses the intention that can be expressed simpler:
rewrite foo/bar from-dep=app-crypt/pinentry to-dep=app-crypt/pinentry-gtk2 if-dep-has-use=gtk drop-use=gtk
Sławomir Nizio
Fabio Erculiani