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#!/usr/bin/perl
use strict;
my $PATH = $ARGV[0];
($PATH and -d $PATH) or die 'invalid path';
my $DEFCONFIG = $ARGV[1];
($DEFCONFIG and -f $DEFCONFIG) or die 'invalid config file';
my %config;
open CONFIG, $DEFCONFIG or die 'cannot open config file';
while (<CONFIG>) {
/^([\w_]+)=([ym])/ and $config{$1} = $2;
/^([\w_]+)=(\d+)/ and $config{$1} = $2;
/^([\w_]+)=(".+")/ and $config{$1} = $2;
}
close CONFIG;
open FIND, "find \"$PATH\" -name Config.in |";
while (<FIND>) {
chomp;
my $input = $_;
s/^$PATH\///g;
s/sysdeps\/linux\///g;
my $output = $_;
print STDERR "$input => $output\n";
$output =~ /^(.+)\/[^\/]+$/ and system("mkdir -p $1");
open INPUT, $input;
open OUTPUT, ">$output";
my ($cur, $default_set, $line);
while ($line = <INPUT>) {
next if $line =~ /^\s*mainmenu/;
# FIXME: make this dynamic
$line =~ s/default CONFIG_FEATURE_BUFFERS_USE_MALLOC/default CONFIG_FEATURE_BUFFERS_GO_ON_STACK/;
$line =~ s/default BUSYBOX_CONFIG_FEATURE_SH_IS_NONE/default BUSYBOX_CONFIG_FEATURE_SH_IS_ASH/;
if ($line =~ /^\s*config\s*([\w_]+)/) {
$cur = $1;
undef $default_set;
}
if ($line =~ /^\s*(menu|choice|end|source)/) {
undef $cur;
undef $default_set;
}
$line =~ s/^(\s*source\s+)/$1package\/busybox\/config\//;
$line =~ s/(\s+)((CONFIG|FDISK|USING|CROSS|EXTRA|PREFIX|FEATURE|HAVE|BUSYBOX)[\w_]*)/$1BUSYBOX_$2/g;
if ($cur) {
($cur !~ /^CONFIG/ or $cur eq 'CONFIG_LFS') and do {
$line =~ s/^(\s*(bool|tristate|string))\s*".+"$/$1/;
};
if ($line =~ /^\s*default/) {
my $c;
$default_set = 1;
$c = $config{$cur} or $c = 'n';
$line =~ s/^(\s*default\s*)(\w+|"[^"]*")(.*)/$1$c$3/;
}
}
print OUTPUT $line;
}
close OUTPUT;
close INPUT;
}
close FIND;
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