First attempt at a homebrew formula

etc/homebrew/inbucket.conf

@@ -6,9 +6,9 @@
 [DEFAULT]
 
 # Not used directly, but is typically referenced below in %()s format.
-brew.pkgshare.dir={{pkgshare}}
-brew.var.dir={{var}}
 default.domain=inbucket.local
+themes.dir={{HOMEBREW_PREFIX}}/share/inbucket/themes
+datastore.dir={{HOMEBREW_PREFIX}}/var/inbucket/datastore
 
 #############################################################################
 [logging]
@@ -76,17 +76,17 @@ ip4.port=9000
 theme=bootstrap
 
 # Path to the selected themes template files
-template.dir=%(brew.pkgshare.dir)s/themes/%(theme)s/templates
+template.dir=%(themes.dir)s/%(theme)s/templates
 
 # Should we cache parsed templates (set to false during theme dev)
 template.cache=true
 
 # Path to the selected themes public (static) files
-public.dir=%(brew.pkgshare.dir)s/themes/%(theme)s/public
+public.dir=%(themes.dir)s/%(theme)s/public
 
 # Path to the greeting HTML displayed on front page, can be moved out of
 # installation dir for customization
-greeting.file=%(brew.pkgshare.dir)s/themes/greeting.html
+greeting.file=%(themes.dir)s/greeting.html
 
 # Key used to sign session cookie data so that it cannot be tampered with.
 # If this is left unset, Inbucket will generate a random key at startup
@@ -97,7 +97,7 @@ cookie.auth.key=secret-inbucket-session-cookie-key
 [datastore]
 
 # Path to the datastore, mail will be written into subdirectories
-path=%(brew.var.dir)s/inbucket
+path=%(datastore.dir)s
 
 # How many minutes after receipt should a message be stored until it's
 # automatically purged.  To retain messages until manually deleted, set this