# $NetBSD: plist-subst.awk,v 1.4 2018/08/22 20:48:37 maya 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. # # 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 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 } } ### ### For each entry, replace all ${...} variables with their respective ### values taken from the environment. ### { for (regexp in substitute) { gsub(regexp, substitute[regexp]) } }