#! /usr/bin/perl -w

# Helper script to generate pre/tmpinstall rules for cpukit Makefile.am.
#
# Usage: ampolish3 Makefile.am > preinstall.am
#
# Reads a Makefile.am from stdin and writes corresponding 
# pre/tmpinstall rules to stdout.
#
# NOTE: This script is cpukit specific. It is not applicable to other 
#     RTEMS Makefile.ams nor to Makefile.ams in general.
#

sub replace($);
sub print_dirstamp($$$);

# Predefined directory mappings 
# final-installation directory => temp installation directory
my %dirmap = (
   '$(includedir)' 		=> '$(PROJECT_INCLUDE)',
   '$(libdir)' 			=> '$(PROJECT_LIB)',
   '$(project_libdir)' 		=> '$(PROJECT_LIB)',
   '$(project_includedir)' 	=> '$(PROJECT_INCLUDE)'
  );

## 1st pass: read in file
my @buffer1 = () ;
my %seen = ();

{
  my $mode = 0 ;
  my $line = '';

  while ( <> )
  {
    if ( $mode == 0 )
    {
      if ( /^([a-zA-Z0-9_]+\s*[\+]?[:=].*)\\$/o )
      {
        $line = "$1" ;
        $mode = 1;
      } else {
        push @buffer1, $_ ;
      }
    } elsif ( $mode == 1 ) {
      if ( /^(.*)\\$/o ) {
        $line .= $1;
      } else {
        $line .= $_ ;
        push @buffer1, $line ;
        $line = '';
        $mode = 0 ;
      }
    }
  }
}

#foreach my $l ( @buffer1 ) { print STDERR "1<$l>"; }

# Filter out all Makefile code not relevant here
my @buffer2 = ();
foreach my $l ( @buffer1 ) {
  if ( $l=~ /^\t.*$/o )
  { #ignore: Production of a make rule.
  } elsif ( $l =~ /^\s*([a-zA-Z0-9_]*dir)\s*\=\s*(.*)\s*$/o )
  { # dirs
    push @buffer2, "$l";
    $dirmap{"\$\($1\)"} = replace($2);
  } elsif ( $l =~ /^\s*noinst_(.*)\s*[\+]?\=(.*)$/o )
  { #ignore: noinst_* are not relevant here.
  } elsif ( $l =~ /^\s*(nodist_|dist_|)(project_|)(include)_(HEADERS)\s*\=(.*)/o )
  {
    push @buffer2, "$3dir = \$($3dir)\n";
    push @buffer2, "$l";
  } elsif ( $l =~ /^\s*(nodist_|dist_|)(project_|)([a-zA-Z0-9_]+)_(HEADERS)\s*[\+]?\=(.*)/o )
  {
    push @buffer2, "$l";
  } elsif ( $l =~ /^\s*(nodist_|dist_|)(project_[a-zA-Z0-9_]+)_(DATA|SCRIPTS|LIBRARIES|PROGRAMS)\s*[\+]?\=(.*)/o )
  {
    push @buffer2, "$l";
  } elsif ( $l =~ /^\s*(if|else|endif)\s*.*$/o )
  { # conditionals
    push @buffer2, "$l";
  }
}

# foreach my $l ( @buffer2 ) { print STDERR "$l"; }

my @buffer3 = ();

foreach my $l ( @buffer2 ) {
  if ( $l =~ /^\s*([a-zA-Z0-9_]*dir)\s*\=\s*(.*)\s*$/o )
  { # dirs
    my $v = $dirmap{"\$\($1\)"};
    print_dirstamp(\@buffer3,$v,"PREINSTALL_DIRS");
    $seen{"PREINSTALL_DIRS"} = 1;
  } elsif ( $l =~ /^\s*(nodist_|)([a-zA-Z0-9_]*)_HEADERS\s*[\+]?\=(.*)$/o )
  {
      my $v = $dirmap{"\$\($2dir\)"};
      my @instfiles = split(' ',$3);
      foreach my $f ( @instfiles )
      {
        my $x ;
        my $i = rindex($f,'/');
        if ($i < 0) {
          $x="$f";
        } else {
          $x = substr($f,$i+1);
        }
        push @buffer3,
          "$v/$x: $f $v/\$(dirstamp)\n",
          "\t\$(INSTALL_DATA) \$< $v/$x\n",
          "PREINSTALL_FILES += $v/$x\n\n";
        $seen{"PREINSTALL_FILES"} = 1;
      }
  } elsif ( $l =~ /^\s*(nodist_|)([a-zA-Z0-9_]*)_SCRIPTS\s*[\+]?\=(.*)$/o )
  {
      my $v = $dirmap{"\$\($2dir\)"};
      my @instfiles = split(' ',$3);
      foreach my $f ( @instfiles )
      {
        my $x ;
        my $i = rindex($f,'/');
        if ($i < 0) {
          $x="$f";
        } else {
          $x = substr($f,$i+1);
        }
        push @buffer3,
          "$v/$x: $f $v/\$(dirstamp)\n",
          "\t\$(INSTALL_SCRIPT) \$< $v/$x\n",
          "PREINSTALL_FILES += $v/$x\n\n";
        $seen{"PREINSTALL_FILES"} = 1;
      }
  } elsif ( $l =~ /^\s*(nodist_|)([a-zA-Z0-9_]*)_PROGRAMS\s*[\+]?\=(.*)$/o )
  {
      my $v = $dirmap{"\$\($2dir\)"};
      my @instfiles = split(' ',$3);
      foreach my $f ( @instfiles )
      {
        my $x ;
        my $i = rindex($f,'/');
        if ($i < 0) {
          $x="$f";
        } else {
          $x = substr($f,$i+1);
        }
        push @buffer3,
          "$v/$x: $f $v/\$(dirstamp)\n",
          "\t\$(INSTALL_PROGRAM) \$< $v/$x\n",
          "PREINSTALL_FILES += $v/$x\n\n";
        $seen{"PREINSTALL_FILES"} = 1;
      }
  } elsif ( $l =~ /^\s*(nodist_|)([a-zA-Z0-9_]*)_LIBRARIES\s*[\+]?\=(.*)$/o )
  {
      my $v = $dirmap{"\$\($2dir\)"};
      my @instfiles = split(' ',$3);
      foreach my $f ( @instfiles )
      {
        my $x ;
        my $i = rindex($f,'/');
        if ($i < 0) {
          $x="$f";
        } else {
          $x = substr($f,$i+1);
        }
        push @buffer3,
          "$v/$x: $f $v/\$(dirstamp)\n",
          "\t\$(INSTALL_DATA) \$< $v/$x\n",
          "TMPINSTALL_FILES += $v/$x\n\n";
        $seen{"TMPINSTALL_FILES"} = 1;
      }
  } elsif ( $l =~ /^\s*(nodist_|)([a-zA-Z0-9_]*)_DATA\s*[\+]?\=(.*)$/o )
  {
      my $v = $dirmap{"\$\($2dir\)"};
      my @instfiles = split(' ',$3);
      foreach my $f ( @instfiles )
      {
        my $x ;
        my $i = rindex($f,'/');
        if ($i < 0) {
          $x="$f";
        } else {
          $x = substr($f,$i+1);
        }
        push @buffer3,
          "$v/$x: $f $v/\$(dirstamp)\n",
          "\t\$(INSTALL_DATA) \$< $v/$x\n",
          "TMPINSTALL_FILES += $v/$x\n\n";
        $seen{"TMPINSTALL_FILES"} = 1;
      }
  } elsif ( $l =~ /^\s*(if|else|endif)\s*.*$/o )
  { # conditionals
    push @buffer3, "$l";
  }
}

# foreach my $l ( @buffer3 ) { print STDERR "$l"; }

my $output;
$output .= "## Automatically generated by ampolish3 - Do not edit\n\n";
$output .=  "if AMPOLISH3\n";
$output .=  "\$(srcdir)/preinstall.am: Makefile.am\n";
$output .= "\t\$(AMPOLISH3) \$(srcdir)/Makefile.am > \$(srcdir)/preinstall.am\n";
$output .= "endif\n\n";

foreach my $k ( keys %seen )
{
  $output .= "$k =\n";
  if ( $k =~ /.*FILES/o ) {
    $output .= "CLEANFILES += \$($k)\n";
  } elsif ( $k =~ /.*DIRS/o ) {
    $output .= "DISTCLEANFILES += \$($k)\n";
  }
  $output .= "\n";
}

# Pretty printing
$output .= join ( '', @buffer3 );
$output =~ s/\nelse\n+endif/\nendif/g;
$output =~ s/\n\n+endif/\nendif/g;
$output =~ s/\nif [a-zA-Z0-9_!]+\n+endif//g;
print STDOUT $output;

exit 0;

sub replace($)
{
  my ($v) = @_;
  foreach my $i ( keys %dirmap )
  {
    $v =~ s/\Q$i/$dirmap{$i}/g;
  }
  return $v;
}

sub print_dirstamp($$$)
{
  my ($obuf,$file,$inst) = @_ ;
  push @{$obuf}, "$file/\$(dirstamp):\n\t\@\$\(mkdir_p\) $file\n" ;
  push @{$obuf}, "\t\@: \> $file/\$(dirstamp)\n" ;
  push @{$obuf}, "$inst += $file/\$(dirstamp)\n\n" ;
}