source: freewrt/scripts/gen_busybox_menuconfig.pl@ fdd4f59

#!/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;