adepend
This is modeled on the makedepend tool used for C/C++ programs that can be used to automatically produce file dependencies for make files. Given an ACT file, adepend will produce a one-line output that shows the dependency of the ACT file on others.
Suppose your ACT_HOME is set to /usr/local/cad, and you have the following test.act file:
import globals; defproc test() { chp { skip } }
Then adepend output will look like this:
$ adepend test.act test.act: /usr/local/cad/act/globals.act