#!/bin/sh
#  -*-Perl-*-
#======================================================================#
# Run the right perl version:
if [ -x /usr/local/bin/perl ]; then
  perl=/usr/local/bin/perl
elif [ -x /usr/bin/perl ]; then
  perl=/usr/bin/perl
else
  perl=`which perl| sed 's/.*aliased to *//'`
fi

exec $perl -x -S $0 "$@";     # -x: start from the following line
#======================================================================#
#! /Good_Path/perl -w 
# line 17

# Name:   mkdot
# Author: wd (Wolfgang.Dobler@kis.uni-freiburg.de)
# Started:   06-Jul-2002
# CVS: $Id$
# Usage:
#  cd src
#  scripts/mkdot *.f90 -o dependencies.dot
#  dot -Tps dependencies.dot -o dependencies.ps
# Note: The `dot' command is part of the graphviz package

# History:
#   23-jun-05/tony: Created
#

# ---------------------------------------------------------------------- #
my $use_statement  = '^\s*use\s+([A-Za-z_]+)\s*(,\s*only: ([A-Za-z0-9_,\s]+))*$';
my $module_start  = '^\s*module\s+([A-Za-z_]+)\s*$';
my $module_end  = '^\s*end\s*module\s+([A-Za-z_]+)\s*$';
my $program_start  = '^\s*program\s+([A-Za-z_]+)\s*$';
my $program_end  = '^\s*end\s*program\s+([A-Za-z_]+)\s*$';
my $main_program_module = 'MAIN_PROGRAM';
my $current_module = $main_program_module;
my %unique_dep;
# ---------------------------------------------------------------------- #

use strict;
use Getopt::Long;

my $line;
my $dust_string='1*4';
my $lmdvar='.false.';
my $lmice ='.false.';
my ($maux,$maux_com,$mvar,$mpvar,$ndustspec,$mvar_per_dust) = (0) x 6;

(my $cmdname = $0) =~ s{.*/}{};

## Process command line
my (%opts);	# Variables written by GetOptions
GetOptions(\%opts,
	   qw( -h   --help
	            --nono
	       -T=s --title=s
	       -o=s --output=s
                               ));

my $nono = $opts{nono};
die usage() if ((@ARGV == 0) || $opts{h} || $opts{help});
my $title = ($opts{T} || $opts{title} || 'dependencies');

my $outfile = ($opts{o} || $opts{output} || "-");
open(OUT, "> $outfile") or die "Can't open $outfile for writing";

## Write output
print OUT <<"EOF";
//  -*-f90-*-  (for emacs)    vim:set filetype=fortran:  (for vim)
//  DOT description for Module dependence
//
digraph "$title" {
    rotate=90;
    size="11,7.55";
    ratio = fill;
    node[width=5.5,hight=4.,fontsize=50];
EOF

# Cycle through files (later files will overwrite effect of earlier files)
file: foreach my $infile (@ARGV) {
# Now extract `?VAR CONTRIBUTION' info from each file
print OUT "// Processing file: $infile\n";
	$current_module=$main_program_module;
    unless (open(INPUT,"< $infile")) {
	print STDERR "Skipping $infile (not found)\n";
	next file;
    }
# Cycle through all lines up to first non-empty non-comment line in file
    line: while (defined($line=<INPUT>)) {
	next line if ($line =~ /^\s*$/); # ignore empty lines
#	last line if ($line !~ /^\s*!/); # done if non-comment line
#	extract_decl ($line, $mvar_decl    , \$mvar     );
#	extract_decl ($line, $maux_decl    , \$maux     );
#	extract_decl ($line, $maux_com_decl, \$maux_com );
#	extract_decl ($line, $mpvar_decl   , \$mpvar    );
# Check for information about number of dust species and discretization type   
	  if ($line=~ /$program_start/i) {
        $current_module="$1";
        $current_module =~ tr/a-z/A-Z/;
      }
	  if ($line=~ /$program_end/i) {$current_module=$main_program_module;}
	  if ($line=~ /$module_start/i) {
        $current_module=$1;
        $current_module =~ tr/a-z/A-Z/;
        if ($infile =~ /^no/) { print OUT "$current_module [color=blue,fontcolor=blue]\n"}
      }
	  if ($line=~ /$module_end/i) {$current_module=$main_program_module;}
	  if ($line=~ /$use_statement/i) {
        my $dependency= $1;
        $dependency =~ tr/a-z/A-Z/;
        if (! exists($unique_dep{"$current_module$dependency"})) {
          $unique_dep{"$current_module$dependency"}="exists"; 
          if (!($nono && $infile=~ /^no/)) { print OUT "  $current_module -> $dependency;\n"; }
        }
      }
    }
}

## Write output
print OUT <<"EOF";
}
EOF


# ---------------------------------------------------------------------- #
sub extract_decl{
## Extract declaration of contribution to mvar and similar
    my $line = shift;
    my $regexp = shift;
    my $counter_ref = shift;

    if ($line =~ /$regexp/) {
	  $$counter_ref += $1;
      }
}

# ---------------------------------------------------------------------- #
sub usage {
# Extract description and usage information from this file's header.
    my $thisfile = __FILE__;
    local $/ = '';              # Read paragraphs
    open(FILE, "<$thisfile") or die "Cannot open $thisfile\n";
    while (<FILE>) {
	# Paragraph _must_ contain `Description:' or `Usage:'
        next unless /^\s*\#\s*(Description|Usage):/m;
        # Drop `Author:', etc. (anything before `Description:' or `Usage:')
        s/.*?\n(\s*\#\s*(Description|Usage):\s*\n.*)/$1/s;
        # Don't print comment sign:
        s/^\s*# ?//mg;
        last;                        # ignore body
    }
    $_ or "<No usage information found>\n";
}
# ---------------------------------------------------------------------- #

# End of file mkdot