\version "2.19.80"
\include "oll-core/package.ily"
\loadPackage edition-engraver

\consistToContexts #edition-engraver Voice.Staff.Score

condGrobTweak =
#(define-music-function (use_octave pred_pitch grob_proc)((boolean? #f) ly:pitch? procedure?)
   (let ((pred_note (ly:pitch-notename pred_pitch))
         (pred_alteration (ly:pitch-alteration pred_pitch))
         (pred_octave (ly:pitch-octave pred_pitch)))
     #{
       \override NoteHead.before-line-breaking =
       #(lambda (grob)
          (let* ((cause (ly:grob-property grob 'cause))
                 (pitch (ly:prob-property cause 'pitch))
                 (note (ly:pitch-notename pitch))
                 (alteration (ly:pitch-alteration pitch))
                 (octave (ly:pitch-octave pitch)))
            (if (and (eqv? alteration pred_alteration)
                     (eqv? note pred_note)
                     (or (not use_octave)(eqv? octave pred_octave)))
                (grob_proc grob))))
     #}))
#(define (omit-accidental grob)
   (let ((accidental (ly:grob-object grob 'accidental-grob)))
     (if (ly:grob? accidental)
         (ly:grob-set-property! accidental 'stencil #f)
         )))

\addEdition accidentals
\editionMod accidentals 1 0/4 Voice \once \condGrobTweak gis #omit-accidental

{ <cis' eis' gis' ais'> }