genericize.pl revision eb1a5f8de9f7ea602c373a710f531abbf81141c4
1#!/usr/bin/perl -w
2#-
3# Copyright (c) 2004 Dag-Erling Co��dan Sm��rgrav
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer
11#    in this position and unchanged.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15# 3. The name of the author may not be used to endorse or promote products
16#    derived from this software without specific prior written permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28#
29# $FreeBSD$
30#
31
32use strict;
33use Getopt::Std;
34
35sub EMPTY() {}
36
37MAIN:{
38    my %opts;
39    getopts('c', \%opts);
40
41    my %config;
42    my $machine;
43    my $ident;
44
45    while (<>) {
46	chomp();
47	s/\s*(\#.*)?$//;
48	next unless $_;
49	my ($keyword, $values) = split(' ', $_, 2);
50	foreach my $value (split(/,\s*/, $values)) {
51	    if ($keyword eq 'machine') {
52		$machine = $value;
53	    } elsif ($keyword eq 'ident') {
54		$ident = $value;
55	    } elsif ($keyword eq 'options' && $value =~ m/(\w+)=(.+)/) {
56		$config{$keyword}->{$1} = $2;
57	    } else {
58		$config{$keyword}->{$value} = \&EMPTY;
59	    }
60	}
61    }
62
63    my $generic;
64    if ($machine) {
65	$generic = "/usr/src/sys/$machine/conf/GENERIC";
66    } else {
67	($generic = $ARGV) =~ s|([^/])+$|GENERIC|;
68    }
69    local *GENERIC;
70    open(GENERIC, "<", $generic)
71	or die("$generic: $!\n");
72    my $blank = 0;
73    while (<GENERIC>) {
74	my $line = $_;
75	chomp();
76	if ($opts{'c'} && m/^\s*\#/) {
77	    if ($blank) {
78		print "\n";
79		$blank = 0;
80	    }
81	    print $line;
82	    next;
83	}
84	++$blank unless $_;
85	s/\s*(\#.*)?$//;
86	next unless $_;
87	my ($keyword, $value) = split(' ', $_);
88	if ($keyword eq 'machine') {
89	    die("$generic is for $value, not $machine\n")
90		unless ($value eq $machine);
91	} elsif ($keyword eq 'ident') {
92	    $line =~ s/$value/$ident/;
93	} elsif ($keyword eq 'options' && $value =~ m/(\w+)=(.+)/ &&
94	    $config{$keyword} && $config{$keyword}->{$1} &&
95	    $config{$keyword}->{$1} != \&EMPTY) {
96	    $value = $1;
97	    if ($config{$keyword}->{$value} ne $2) {
98		my ($old, $new) = ($2, $config{$keyword}->{$value});
99		$line =~ s{=$old}{=$new};
100	    }
101	    delete($config{$keyword}->{$value});
102	    delete($config{$keyword})
103		unless %{$config{$keyword}};
104	} elsif ($config{$keyword} && $config{$keyword}->{$value}) {
105	    delete($config{$keyword}->{$value});
106	    delete($config{$keyword})
107		unless %{$config{$keyword}};
108	} else {
109	    next;
110	}
111	if ($blank) {
112	    print "\n";
113	    $blank = 0;
114	}
115	print $line;
116    }
117    close(GENERIC);
118
119    if (%config) {
120	print "\n# Addenda\n";
121	foreach my $keyword (sort(keys(%config))) {
122	    foreach my $value (sort(keys(%{$config{$keyword}}))) {
123		print "$keyword";
124		if (length($keyword) < 7) {
125		    print "\t";
126		} elsif (length($keyword) == 7) {
127		    print " ";
128		}
129		print "\t$value";
130		print "=$config{$keyword}->{$value}"
131		    unless $config{$keyword}->{$value} == \&EMPTY;
132		print "\n";
133	    }
134	}
135    }
136    exit(0);
137}
138