defaults/Jambase.clean

   1 # /Clean  clean : targets ;
   2 #
   3 # Removes existing _targets_ when _clean_ is built. clean is not a dependency
   4 # of all, and must be built explicitely for targets to be removed
   5 #
   6
   7 actions piecemeal together existing Clean {
   8   $(RM) $(>)
   9 }
  10
  11
  12 rule RmTemps {
  13   Temporary $(>) ;
  14 }
  15
  16 actions quietly updated piecemeal together RmTemps {
  17   $(RM) $(>)
  18 }
  19
  20
  21 # convert 'target clean' to 'target_clean'
  22 rule --normalize-cleans-- {
  23   local _t _pt _nt ;
  24   _pt = ; # prev target
  25   _nt = ; # new JAM_TARGETS
  26   for _t in $(JAM_TARGETS) {
  27     if $(_t) = "clean" {
  28       if $(_pt) {
  29         # have previous target
  30         _nt += $(_pt)_clean ;
  31       } else {
  32         _nt += $(_t) ;
  33       }
  34       _pt = ;
  35       continue;
  36     }
  37     if $(_pt) { _nt += $(_pt) ; }
  38     _pt = $(_t) ;
  39   }
  40   if $(_pt) { _nt += $(_pt) ; }
  41   #Echo "new targets:" $(_nt) ;
  42   JAM_TARGETS = $(_nt) ;
  43 }
  44
  45
  46 if "clean" in $(JAM_TARGETS) {
  47   --normalize-cleans-- ;
  48 }