(*

Module: AptPreferences

  Apt/preferences module for Augeas

Author: Raphael Pinson <raphael.pinson@camptocamp.com>

*)

module AptPreferences =

autoload xfm

(************************************************************************

 * Group: Entries

 ************************************************************************)

(* View: colon *)

let colon        = del /:[ \t]*/ ": "

(* View: pin_gen

     A generic pin

   Parameters:

     lbl:string - the label *)

let pin_gen (lbl:string) = store lbl

                        . [ label lbl . Sep.space . store Rx.no_spaces ]

(* View: pin_keys *)

let pin_keys =

     let space_in = store /[^, \r\t\n][^,\n]*[^, \r\t\n]|[^, \t\n\r]/

  in Build.key_value /[aclnov]/ Sep.equal space_in

(* View: pin_options *)

let pin_options =

    let comma = Util.delim ","

 in store "release" . Sep.space

                    . Build.opt_list pin_keys comma

(* View: version_pin *)

let version_pin = pin_gen "version"

(* View: origin_pin *)

let origin_pin = pin_gen "origin"

(* View: pin *)

let pin =

     let pin_value = pin_options | version_pin | origin_pin

  in Build.key_value_line "Pin" colon pin_value

(* View: entries *)

let entries = Build.key_value_line ("Explanation"|"Package"|"Pin-Priority")

                                   colon (store Rx.space_in)

            | pin

            | Util.comment

(* View: record *)

let record = [ seq "record" . entries+ ]

(************************************************************************

 * Group: Lens

 ************************************************************************)

(* View: lns *)

let lns = Util.empty* . (Build.opt_list record Util.eol+ . Util.empty*)?

(* View: filter *)

let filter = incl "/etc/apt/preferences"

           . incl "/etc/apt/preferences.d/*"

           . Util.stdexcl

let xfm = transform lns filter