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|
#! /usr/bin/perl
my @args=@ARGV;
my %configvalues;
my @configoptions;
my $configcounter = 0;
# optionally print out the architecture as the first line of our output
my $arch = $args[2];
if (defined $arch) {
print "# $arch\n";
}
# first, read the override file
open (FILE,"$args[0]") || die "Could not open $args[0]";
while (<FILE>) {
my $str = $_;
my $configname;
if (/\# ([\w]+) is not set/) {
$configname = $1;
} elsif (/^\#/) {
# fall through on comments like 'avoid CONFIG_FOO=y'
;
} elsif (/([\w]+)=/) {
$configname = $1;
}
if (defined($configname) && !exists($configvalues{$configname})) {
$configvalues{$configname} = $str;
$configoptions[$configcounter] = $configname;
$configcounter ++;
}
};
# now, read and output the entire configfile, except for the overridden
# parts... for those the new value is printed.
open (FILE2,"$args[1]") || die "Could not open $args[1]";
while (<FILE2>) {
my $configname;
if (/\# ([\w]+) is not set/) {
$configname = $1;
} elsif (/^\#/) {
# fall through on comments like 'avoid CONFIG_FOO=y'
;
} elsif (/([\w]+)=/) {
$configname = $1;
}
if (defined($configname) && exists($configvalues{$configname})) {
print "$configvalues{$configname}";
delete($configvalues{$configname});
} else {
print "$_";
}
}
# now print the new values from the overridden configfile
my $counter = 0;
while ($counter < $configcounter) {
my $configname = $configoptions[$counter];
if (exists($configvalues{$configname})) {
print "$configvalues{$configname}";
}
$counter++;
}
1;
|
