#!/usr/bin/perl

# Copyright (c) 2009 Symbian Foundation Ltd

# This component and the accompanying materials are made available

# under the terms of the License "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Symbian Foundation Ltd - initial contribution.

# 

# Contributors:

#

# Description:

# Adds info form a file to a CSV

use strict;

main();

sub main()

{

  my $csvfile = shift @ARGV;

  if(! -e $csvfile)

  {

    die "cannot find $csvfile\n";

  }

  open(CSV,"<$csvfile") or die "Couldn't open $csvfile\n";

  my $header = <CSV>;

  $header =~ s/\n//;

  print RESULTS $header.",status\n";

  my @fields = split(',',$header);

  my $targetindex = 0;

  my $counter = 0;

  my $bldinfindex = 0;

  my $makefileindex = 0;

  my $typeindex = 0;

  my $extindex = 0;

  my %failed;

  my %bldinffiles;

  my %targets;

  foreach my $column (@fields)

  {

      if($column =~ m/target/)

      {

          $targetindex = $counter;

      }

      elsif($column =~ m/bldinf/)

      {

        $bldinfindex = $counter;

      }

      elsif($column =~ m/makefile/)

      {

        $makefileindex = $counter;

      }

      elsif($column =~ m/type/)

      {

        $typeindex = $counter;

      }

      elsif($column =~ m/extension/)

      {

        $extindex = $counter;

      }

      ++$counter;

  }

#        print "\ntarget:$targetindex\tbuildinf:$bldinfindex\n";

    #header

  my $resultsfile = $csvfile."_collisions.csv"; 

  open(RESULTS, ">$resultsfile") or die "Coudn't open $resultsfile";

  print RESULTS "Collision,target,extension,type,source1,source2\n";

  while(my $line = <CSV>)

      {

      $line =~ s/\n//;

      @fields = split(',',$line);

      my $target = $fields[$targetindex];

      $target = lc($target);

      my $makefile = $fields[$makefileindex];

      my $bldinf =   $fields[$bldinfindex];

      if(defined $targets{$target})

        {

          my $currentmakefile = $targets{$target};

          if($makefile eq "")

          {

            $makefile = $bldinf;

          }

          if (!($currentmakefile eq $makefile))

            {

            my $type = $fields[$typeindex]; #DODGY - smoe custom makefiles also clash with export headers...

            my $ext = $fields[$extindex];

            my $collision = "-";

            if($type eq "export")

            {

              $collision = diffcollision($target,$currentmakefile,$makefile);

            }   

            print RESULTS "$collision,$target,$ext,$type,$currentmakefile,$makefile\n";

            }

        }

      else

        {

          if($makefile eq "")

          {

             $targets{$target} = $bldinf;

          }

          else

          {

            $targets{$target} = $makefile;

          }  

        }      

      }

  close RESULTS;    

  close CSV;

}

sub diffcollision($$$)

{

  my $target = shift;

  my $left = shift;

  my $right = shift;

  $target =~ s/\//\\/g;

  $left  =~ s/\//\\/g;

  $right =~ s/\//\\/g;  

  my $ret = "unknown";

  if(!-e $target)

  {

    $ret = "missing";

  }

  else

  {

    if(-e $left && -e $right)

    {

      my $leftdiff = 0;

      my $rightdiff = 0;

      open(DIFF,"diff $left $target|") or die "couldn't execute diff";

      print "diff $left $target\n";

      while(my $line = <DIFF>)

      {

        if($line =~ m/\S+/)

        {

          $leftdiff = 1;

          print "\t$line";

        }

      }

      close DIFF;

      open(DIFF,"diff $right $target|") or die "couldn't execute diff";

      print "diff $right $target\n";

      while( my $line = <DIFF>)

      {

        if($line =~ m/\S+/)

        {

          $rightdiff = 1;

         print "\t$line";

        }

      }

      close DIFF;

     if($leftdiff && !$rightdiff )

        {$ret = "match right";}

     elsif($rightdiff && !$leftdiff)

        {$ret = "match left";}

     elsif($rightdiff && $leftdiff)

        {$ret = "match neither";}

     elsif(!$rightdiff && !$leftdiff)

        {$ret = "match both";}                  

    }

  }

  return $ret; 

}