This screams "symlink" to me...

In your embperl files: 

  use lib "/var/www/intranet/currently-in-use/lib"

[download]
And on the shell: 
  $ ln -s /var/www/intranet/stable /var/www/intranet/currently-in-use
  
  .. time passes, switch to devel version ..
  
  $ rm /var/www/intranet/currently-in-use
  $ ln -s /var/www/intranet/devel /var/www/intranet/currently-in-use

[download]

blokhead

In reply to Re: File/Directory hierarchy for devel/stable versions by blokhead
in thread File/Directory hierarchy for devel/stable versions by TVSET

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