[NAME]
cfget \- get values from a config file

/^Get values from a config file.$/
cfget is a simple tool to read values from configuration files.  It is
useful, for example, to create configurable shellscripts or makefiles.
.P
It can also be configured to support virtual configuration values that, if not
present in the config file, are automatically computed from the existing
values. This makes it convenient, for example, to get a "duration" value from
a configuration file that only contains a "start date" and an "end date".

[EXAMPLES]
.nf
	# Get a key from a config file
	cfget \-C file.ini general/name

	# More can be specified, they will be searched in order
	cfget \-C general.ini \-C local.ini general/name

	# Use a plugin to add virtual entries
	cfget \-C file.ini \-\-plugin=virtual.py general/name

	# A plugin can also a directory containing .py files
	# and plugins can also be specified more than once
	cfget \-C file.ini \-\-plugin=virtual.py \-\-plugin=virtual/ general/name

	# In a shellscript, you may want to use environment variables if you
	# invoke cfget many times:
	#!/bin/sh
	CFGET_CFG=general.ini:local.ini
	CFGET_PLUGINS=virtual.py:virtual/
	START=`cfget general/start`
	END=`cfget general/end`
	DURATION=`cfget general/duration`

	# Quick way to copy all config values to the environment
	eval `cfget \-\-dump=exports \-C file.ini`

	# Autoconf-style template substitution
	cfget \-\-template=autoconf \-C file.ini script.in script

	# Curly braces substitude literally
	cfget \-C file.ini "general/start_{general/type}"

	# One can use simple expressions
	cfget \-C file.ini "general/start + general/duration"
	cfget \-C file.ini "round(general/age / 2)"
.fi

.SH AUTHOR
\fBcfget\fP has been written by Enrico Zini <enrico@enricozini.org>.

