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add a simple maintenance tool for kernel config files

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SVN-Revision: 5782
This commit is contained in:
Felix Fietkau 2006-12-14 04:59:04 +00:00
parent 317aa7af59
commit 40d58259b7
1 changed files with 142 additions and 0 deletions
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142
scripts/config.pl Executable file
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@ -0,0 +1,142 @@
#!/usr/bin/env perl
#
# Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
use warnings;
use strict;
my @arg = @ARGV;
sub load_config($) {
my $file = shift;
my %config;
open FILE, "$file" or die "can't open file";
while (<FILE>) {
chomp;
/^CONFIG_(.+)=(.+)/ and do {
$config{$1} = $2;
next;
};
/^# CONFIG_(.+) is not set/ and do {
$config{$1} = -1;
next;
};
/^#/ and next;
/^(.+)$/ and print "WARNING: can't parse line: $1\n";
}
return \%config;
}
sub config_and($$) {
my $cfg1 = shift;
my $cfg2 = shift;
my %config;
foreach my $config (keys %$cfg1) {
my $val1 = $cfg1->{$config};
my $val2 = $cfg2->{$config};
$val2 and ($val1 eq $val2) and do {
$config{$config} = $val1;
};
}
return \%config;
}
sub config_add($$) {
my $cfg1 = shift;
my $cfg2 = shift;
my %config;
for ($cfg1, $cfg2) {
my %cfg = %$_;
foreach my $config (keys %cfg) {
$config{$config} = $cfg{$config};
}
}
return \%config;
}
sub config_diff($$) {
my $cfg1 = shift;
my $cfg2 = shift;
my %config;
foreach my $config (keys %$cfg2) {
if (!$cfg1->{$config} or $cfg1->{$config} ne $cfg2->{$config}) {
$config{$config} = $cfg2->{$config};
}
}
return \%config
}
sub config_sub($$) {
my $cfg1 = shift;
my $cfg2 = shift;
my %config = %{$cfg1};
foreach my $config (keys %$cfg2) {
delete $config{$config};
}
return \%config;
}
sub print_cfgline($$) {
my $name = shift;
my $val = shift;
if ($val eq '-1') {
print "# CONFIG_$name is not set\n";
} else {
print "CONFIG_$name=$val\n";
}
}
sub dump_config($) {
my $cfg = shift;
die "argument error in dump_config" unless ($cfg);
my %config = %$cfg;
foreach my $config (sort keys %config) {
print_cfgline($config, $config{$config});
}
}
sub parse_expr($);
sub parse_expr($) {
my $pos = shift;
my $arg = $arg[$$pos++];
die "Parse error" if (!$arg);
if ($arg eq '&') {
my $arg1 = parse_expr($pos);
my $arg2 = parse_expr($pos);
return config_and($arg1, $arg2);
} elsif ($arg =~ /^\+/) {
my $arg1 = parse_expr($pos);
my $arg2 = parse_expr($pos);
return config_add($arg1, $arg2);
} elsif ($arg eq '>') {
my $arg1 = parse_expr($pos);
my $arg2 = parse_expr($pos);
return config_diff($arg1, $arg2);
} elsif ($arg eq '-') {
my $arg1 = parse_expr($pos);
my $arg2 = parse_expr($pos);
return config_sub($arg1, $arg2);
} else {
return load_config($arg);
}
}
my $pos = 0;
dump_config(parse_expr(\$pos));
die "Parse error" if ($arg[$pos]);