Eli System Administration Guide
Eli embodies an understanding of how to generate text processors from
specifications of their behavior.
This understanding has been developed over many years by a host of people,
and is expressed in a large number of tools and work flow patterns.
The generation process creates many intermediate artifacts, which
must be passed among the tools.
A change in a specification may make it necessary to rebuild some of these
artifacts by executing particular tools.
Odin is a program capable of managing a collection of artifacts and
tools to provide a product that is up-to-date with respect to all of the
raw material on which it is based.
The tools and associated work flow patterns are described to Odin by a
derivation graph.
Modularity in the derivation graph specification is achieved by gathering
related tools and the work flow patterns connecting them into
packages.
In order to use Odin to derive specific products from specific raw
material, a
cache must be available.
A cache is represented in the computer by a single directory.
It contains a derivation graph built from some set of packages,
plus all of the artifacts created when deriving products
defined by that derivation graph.
Each user may establish an arbitrary number of caches, and each cache may
be shared by an arbitrary number of users.
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