Fellow Monks,

I am trying to interpolate java style property values simuliar to the way ant does it. See below 

build.dir = /usr/build
product.dir = ${build.dir}/product

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In this example, product.dir expands to be /usr/build/product

I am using the Config::Properties module for a base. I have a function that takes a properites hash 

# File contents
build=/usr/local/build
eval=evaluation
full=distribution
PRODUCTONE=${build}/${eval}
PRODUCTTWO=${build}/${full}/Second

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I have it resolving the first value in a variable (PRODUCTONE) to /usr/local/build. The problem is that when the second value is resolved to blank. Here is a Dumper dump (faux). 
VAR '1' = 
{
  'build' => '/usr/local/build',
  'eval' => 'evaluation',
  'full' => 'distribution',
  'PRODUCTONE' => '/usr/local/build/',
  'PRODUCTTWO' => '/usr/local/build//Second',
}

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This problem has me pulling out my hair, and I really need help. Here is the snippet of code that I am using... 

#=====================================================================
+=
  sub interpolateValues($)
  {
    my $self = shift;

    return unless defined($INTWeb::Properties::INTERPOLATE_VALUES);
    my $List = shift;

    foreach my $listKey (keys(%{$List}))
    {
      my $listValue = $List->{$listKey};
      #print "|--+ $listKey: $listValue\n";

      if ($listValue =~ m/\$\{(.*?)\}/)
      {
         my $extractedVariable = $1;
         my $defined = $self->isDefined($List, $extractedVariable);
         $defined += $self->isDefined($self->{Resolved}, $extractedVar
+iable);
         die("FATAL: $extractedVariable is not a valid propery variabl
+e name\n") if($defined == 0);

         my $substituteThis = $extractedVariable;
         my $substituteWith = $self->{Resolved}->{$extractedVariable};

         my $final = $List->{$listKey};
         $final =~ s/(\$\{$extractedVariable\}/$substituteWith/;
         print "FINAL: $final\n";
      }

      else
      {
        $self->{Resolved}->{$listKey} = $List->{$listKey};
        delete ($List->{$listKey});
      }
    }
  }

  sub isDefined
  {
    my $self = shift;
    my $hash = shift;
    my $key = shift;

    return defined($hash->{$key});
  }

#---------------------------------------------------------------------
+-

[download]
Please help.

Kristofer Hoch

Si vos can lego is, vos es super erudio

In reply to Interpolating Property strings help. by krisahoch

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