It's an idea... 

#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11131998
use warnings;
use Algorithm::Diff qw(traverse_sequences);
use List::Util qw( first );

use Test::More;

sub list2glob 
  {
  @_ == 2 and return pair(@_);
  my @best;
  for my $i ( 0 .. $#_ - 1 )
    {
    for my $j ( $i + 1 .. $#_ )
      {
      my @rest = ( pair(@_[$i, $j]), map $_[$_],
        grep $_ != $i && $_ != $j, 0 .. $#_ );
      my $try = list2glob(@rest);
      $best[length $try] = $try;
      }
    }
  return first { defined } @best;
  }

sub pair 
  {
  my $answer = my $left = my $right = '';
  my @from = split //, shift;
  my @to = split //, shift;
  traverse_sequences( \@from, \@to,
    {
    MATCH     => sub
      {
      length $left . $right and $answer .= "{$left,$right}";
      $left = $right = '';
      $answer .= $from[shift()]
      },
    DISCARD_A => sub {$left .= $from[shift()]},
    DISCARD_B => sub {$right .= $to[pop()]},
    } );
  length $left . $right and $answer .= "{$left,$right}";
  return $answer;
  }

is list2glob('a', 'b'), '{a,b}';
is list2glob('ab', 'ac'), 'a{b,c}';
is list2glob('aXb', 'aYb'), 'a{X,Y}b';

is list2glob(qw( a1b3c a1b4c a2b3c a2b4c )), 'a{1,2}b{3,4}c';

is list2glob(qw( /ab/ef/ij/kl /ab/ef/ij/mn /ab/ef/ij
                 /cd/gh/ij/kl /cd/gh/ij/mn /cd/gh/ij )),
    '/{ab,cd}/{ef,gh}/ij{/{kl,mn},}';

done_testing();

[download]

Outputs: 

ok 1
ok 2
ok 3
ok 4
ok 5
1..5

[download]

See if you can figure out why I left out some tests :)

In reply to Re: Challenge: Generate a glob patterns from a word list by tybalt89
in thread Challenge: Generate a glob patterns from a word list by choroba

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