The bundle provides two packages: commado and filesdo.

The package commado provides the command \DoWithCSL:

\DoWithCSL{ applies an existing one-parameter macro cmd to each item in a list list in which terms are separated by commas.

The package filesdo provides the command \DoWithBasesExts:

\DoWithBasesExts{cmd}{bases}{exts}

which runs the single parameter command cmd on each file whose base and extension are respectively from the comma-separated lists bases and exts.

These ‘loop’-like commands are (themselves) entirely expandable.

The packages rely on packages plainpkg, and stacklet

See also loops.

The author is Uwe Lück. The package is Copyright © 2012 Uwe Lück.