add scripts/diffconfig.sh: a tool for making reduced .config files

[openwrt.git] / scripts / kconfig.pl

diff --git a/scripts/kconfig.pl b/scripts/kconfig.pl
index c76e297..7073e3b 100755 (executable)
--- a/scripts/kconfig.pl
+++ b/scripts/kconfig.pl
@@ -12,19 +12,32 @@ use strict;
 my @arg;
 my $PREFIX = "CONFIG_";
 
 my @arg;
 my $PREFIX = "CONFIG_";
 

-sub load_config($) {
+sub set_config($$$$) {
+       my $config = shift;
+       my $idx = shift;
+       my $newval = shift;
+       my $mod_plus = shift;
+
+       if (!defined($config->{$idx}) or !$mod_plus or
+           $config->{$idx} eq '#undef' or $newval eq 'y') {
+               $config->{$idx} = $newval;
+       }
+}
+
+sub load_config($$) {

        my $file = shift;
        my $file = shift;

+       my $mod_plus = shift;

        my %config;
 
        open FILE, "$file" or die "can't open file";
        while (<FILE>) {
                chomp;
                /^$PREFIX(.+?)=(.+)/ and do {
        my %config;
 
        open FILE, "$file" or die "can't open file";
        while (<FILE>) {
                chomp;
                /^$PREFIX(.+?)=(.+)/ and do {

-                       $config{$1} = $2;
+                       set_config(\%config, $1, $2, $mod_plus);

                        next;
                };
                /^# $PREFIX(.+?) is not set/ and do {
                        next;
                };
                /^# $PREFIX(.+?) is not set/ and do {

-                       $config{$1} = "#undef";
+                       set_config(\%config, $1, "#undef", $mod_plus);

                        next;
                };
                /^#/ and next;
                        next;
                };
                /^#/ and next;


@@ -111,14 +124,13 @@ sub dump_config($) {
        }
 }
 
        }
 }
 

-sub parse_expr($);
-
-sub parse_expr($) {
+sub parse_expr {

        my $pos = shift;
        my $pos = shift;

+       my $mod_plus = shift;

        my $arg = $arg[$$pos++];
        my $arg = $arg[$$pos++];

-       
+

        die "Parse error" if (!$arg);
        die "Parse error" if (!$arg);

-       
+

        if ($arg eq '&') {
                my $arg1 = parse_expr($pos);
                my $arg2 = parse_expr($pos);
        if ($arg eq '&') {
                my $arg1 = parse_expr($pos);
                my $arg2 = parse_expr($pos);


@@ -129,7 +141,7 @@ sub parse_expr($) {
                return config_add($arg1, $arg2, 0);
        } elsif ($arg =~ /^m\+/) {
                my $arg1 = parse_expr($pos);
                return config_add($arg1, $arg2, 0);
        } elsif ($arg =~ /^m\+/) {
                my $arg1 = parse_expr($pos);

-               my $arg2 = parse_expr($pos);
+               my $arg2 = parse_expr($pos, 1);

                return config_add($arg1, $arg2, 1);
        } elsif ($arg eq '>') {
                my $arg1 = parse_expr($pos);
                return config_add($arg1, $arg2, 1);
        } elsif ($arg eq '>') {
                my $arg1 = parse_expr($pos);


@@ -140,7 +152,7 @@ sub parse_expr($) {
                my $arg2 = parse_expr($pos);
                return config_sub($arg1, $arg2);
        } else {
                my $arg2 = parse_expr($pos);
                return config_sub($arg1, $arg2);
        } else {

-               return load_config($arg);
+               return load_config($arg, $mod_plus);

        }
 }
 
        }
 }