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#!/usr/bin/awk -f
#
# $NetBSD: reduce-resolved-depends.awk,v 1.2 2013/05/09 23:37:26 riastradh Exp $
#
# Copyright (c) 2012 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Joerg Sonnenberger.
#
# 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.
#
######################################################################
#
# NAME
# reduce-resolved-depends.awk -- drop redundant build dependencies
#
# SYNOPSIS
# reduce-resolved-depends.awk
#
# DESCRIPTION
# reduce-resolved-depends.awk removes build dependencies from the
# dependency list on stdin, if they provided as dependency of
# one of the full dependencies in the list.
#
# ENVIRONMENT
# CAT
# PKG_INFO
# HOST_PKG_INFO (for cross-compilation)
#
######################################################################
BEGIN {
CAT = ENVIRON["CAT"] ? ENVIRON["CAT"] : "cat"
PKG_INFO = ENVIRON["PKG_INFO"] ? ENVIRON["PKG_INFO"] : "pkg_info"
HOST_PKG_INFO = ENVIRON["HOST_PKG_INFO"] ? ENVIRON["HOST_PKG_INFO"] : "pkg_info"
PROGNAME = "reduce-resolved-depends.awk"
ERRCAT = CAT " 1>&2"
while (getline == 1) {
if (NF != 3) {
print "ERROR: [" PROGNAME "] invalid dependency line " $0 | ERRCAT
exit 1
}
if ($1 != "full" &&
$1 != "build" &&
$1 != "tool" &&
$1 != "bootstrap") {
print "ERROR: [" PROGNAME "] invalid dependency line " $0 | ERRCAT
exit 1
}
type[NR] = $1
pattern[NR] = $2
pkg[NR] = $3
}
lines = NR + 1
# Register all full dependencies first.
# Keep track of the first line for each of them to skip duplicates later.
for (i = 0; i < lines; ++i) {
if (type[i] == "full" && checked_full[pkg[i]] != 1) {
checked_full[pkg[i]] = 1
checked_build[pkg[i]] = 1
checked_tool[pkg[i]] = 1
checked_bootstrap[pkg[i]] = 1
print_line[i] = 1
}
}
for (i = 0; i < lines; ++i) {
if (type[i] == "bootstrap" && checked_bootstrap[pkg[i]] != 1) {
checked_bootstrap[pkg[i]] = 1
found = 0
if (PKG_INFO == HOST_PKG_INFO) {
cmd = PKG_INFO " -qr " pkg[i]
while (cmd | getline dpkg) {
if (checked_full[dpkg] == 1)
found = 1
}
close(cmd)
}
if (found == 0)
print_line[i] = 1
}
}
for (i = 0; i < lines; ++i) {
if (type[i] == "tool" && checked_tool[pkg[i]] != 1) {
checked_tool[pkg[i]] = 1
if (checked_bootstrap[pkg[i]] == 1)
continue
found = 0
if (PKG_INFO == HOST_PKG_INFO) {
cmd = PKG_INFO " -qr " pkg[i]
while (cmd | getline dpkg) {
if (checked_full[dpkg] == 1)
found = 1
}
close(cmd)
}
if (found == 0)
print_line[i] = 1
}
}
for (i = 0; i < lines; ++i) {
if (type[i] == "build" && checked_build[pkg[i]] != 1) {
checked_build[pkg[i]] = 1
if (PKG_INFO == HOST_PKG_INFO)
if (checked_bootstrap[pkg[i]] == 1)
continue
found = 0
cmd = PKG_INFO " -qr " pkg[i]
while (cmd | getline dpkg) {
if (checked_full[dpkg] == 1)
found = 1
}
close(cmd)
if (found == 0)
print_line[i] = 1
}
}
for (i = 0; i < lines; ++i) {
if (print_line[i] == 1)
printf("%s\t%s\t%s\n", type[i], pattern[i], pkg[i])
}
}
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