Radix cross Linux Toolchains

#!/usr/bin/perl

use FindBin;
use lib $FindBin::Bin;

use strict;
use warnings FATAL => 'all';

use File::Find;
use _kxLab;


# Global variables
my $header_printed = 0;

my $top_dir;
my @targets;
my $verbose = $ENV{VERBOSE};

my %seen;
my ( @dist_clean_dirs, @clean_dirs, @dist_clean_dirs_all, @clean_dirs_all );
my ( $dist_clean_count, $clean_count );

sub do_clean
{
  unlink "$top_dir/.makefile";

  foreach my $d ( @clean_dirs )
  {
    my $printed_d;

    $printed_d = $d;
    $printed_d =~ s/^$top_dir\///;

    print "\n=======\n" if ( $verbose );
    print "======= Cleaning in $printed_d...\n" if ( $verbose );
    print "=======\n" if ( $verbose );
    _kxLab::system( "make -C $d download_clean" );
    unlink "$d/.makefile";
    unlink <$d/.*_requires*>;
  }
}

sub do_clean_list
{
  my $dir = shift;
  my $cwd = `pwd`;

  chomp $cwd;

  # skip not our directories where we create patches
  return if( $cwd =~ m/.*create\-.*\-patch.*/ );

  return if( ! -f "$cwd/Makefile" );

  # needs clean:
  push @clean_dirs_all, $cwd;
}

sub process_clean
{
  return if( ! $File::Find::dir =~ m/$top_dir\/sources/ );

  # add directory which contains 'Makefile' too.
  if( $_ eq "Makefile" ) { do_clean_list( $File::Find::dir ); }

  return if( ! -d $_ );

  foreach my $d ( @targets )
  {
    if( $d eq $_ ) { do_clean_list( $File::Find::dir ); }
  }
}


foreach ( @ARGV )
{
  push @targets, $_;
}
$top_dir = pop @targets;

if( ! -d $top_dir )
{
  die "\nTop: $top_dir: is not a directory\n\n";
}
if( ! $top_dir =~ m/^\// )
{
  die "\nTop: $top_dir: is not absolute path\n\n";
}

find( \&process_clean, "$top_dir" );

# get unique names:
%seen = ();
@clean_dirs = grep { ! $seen{ $_ }++ } @clean_dirs_all;
@clean_dirs = reverse( keys %seen );

$clean_count = @clean_dirs;

if( $clean_count != 0 )
{
  if( !$header_printed )
  {
    print "\n======= Cleaning downloads tree =======\n\n" if ( $verbose );
    $header_printed = 1;
  }

  do_clean();

  print "\n";
}
else
{
  print "\nCleaning...   (nothing to be done).\n\n";
}