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The general purpose
macro processor
Introduction
gema is a general purpose text processing utility based on the concept
of pattern matching. In general, it reads an input file and copies it to an output
file, while performing certain transformations to the data as specified by a set
of patterns defined by the user. It can be used to do the sorts of things that
are done by Unix utilities such as cpp, grep, sed,
awk, or strings. It can be used as a macro processor, but it
is much more general than cpp or m4 because it does not impose
any particular syntax for what a macro call looks like. Unlike utilities like
sed or awk, gema can deal with patterns that span multiple
lines and with nested constructs. It is also distinguished by being able to use
multiple sets of rules to be used in different contexts.
Included with the program are examples of pattern files for using it to convert
documents to HTML from LaTeX or nroff -man.
gema has been extended with a binding to the scripting language
Lua, named GeL,
that provides the ability of executing piece of Lua code in gema actions.
It also may be used to add gema powerful matching capabilities to any
Lua-enabled software. See the appropriate page
in the documentation section for details.
Documentation
Look at the documents page to read online, or
download, man page, reference manual and other material.
How to get it
Check the latest release at 
Status
gema is in a stable status; no further features
are planned for the time being.
License
Copyright notice:
This software includes parts of "gema", the general-purpose macro translator.
GEMA is © by David N. Gray <DGray@acrg>
(Visit http://gema.sourceforge.net/ for further details)
Permission to use, copy, modify and distribute Gema and its documentation
for any purpose is hereby granted without fee, provided that the above copyright
notice appear in all copies and supporting documentation.
Different representations of the above copyright notice are acceptable as
long as they contain the same information.
Copyright holder makes no representations about the suitability of this
software for any purpose. It is provided "as is" without express
or implied warranty.
David N. Gray March, 2004
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