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# $NetBSD: plist-subst.awk,v 1.1 2006/01/12 23:43:57 jlam Exp $
#
# Copyright (c) 2006 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Johnny C. Lam.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the NetBSD
# Foundation, Inc. and its contributors.
# 4. Neither the name of The NetBSD Foundation nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
### Build an array "substitute" of <regexp, value> pairs, that may be used
### to do variable substitutions in PLIST entries. The variables which
### will be substituted are passed in the environment variable
### PLIST_SUBST_VARS, and the named variables should be found in the
### shell environment.
###
BEGIN {
PLIST_SUBST_VARS = ENVIRON["PLIST_SUBST_VARS"]
split(PLIST_SUBST_VARS, vars, " ")
for (i in vars) {
value = ENVIRON[vars[i]]
var = vars[i]
sub("^PLIST_", "", var)
regexp = "\\${" var "}"
substitute[regexp] = value
}
delete vars
}
###
### For each entry, replace all ${...} variables with their respective
### values taken from the environment.
###
{
for (regexp in substitute) {
gsub(regexp, substitute[regexp])
}
}
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