Migration of older rosdep.yaml bash entries to Groovy

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What is the preferred method for migrating the old multi-line bash script entries in rosdep.yaml files? REP-0111 says that compatiblity was eliminated in Fuerte: http://ros.org/reps/rep-0111.html#backwards-compatibility

Multi-line entries in rosdep.yaml used to be interpreted as bash files, allowing fancy manipulations of dependencies. Is there a migration path for these types of entries? If they are no longer permitted, shouldn't the rosdistro default files eliminate any entries that have bash style entries? https://github.com/ros/rosdistro/blob/master/rosdep/base.yaml

I saw that a similar question was asked here, but no real solution was given. And placing a sudo requiring make install in a package makefile can get swallowed up in rosmake.