I've had a go. I've still got something wrong -I'm not sure where to put them - as the chords still don't transpose but these ones play in a midi (which is why this post has the odd transpose of g to g).

  \version "2.18.2"
  \header {
        encodingdate = "2018-06-19"
        title = "The Kesh Jig"
        subtitle = " "}
        
        
        voicedefault = \transpose g g {
         \relative d' {
         \key g \major \time 6/8
         \repeat volta 2 {
         \partial8
              d8 | g4.^"~" g8 a b | a b a a b d | e d d g d d | e d b d b a \break
              g4.^"~" g8 a b | a b a a b d | e d d g d b | a g fis g4 } \break
         \repeat volta 2 {
         \partial8
              a8 | b4.^"~" d8 b d | e g e d b a | b4.^"~" d8 b g | a b a a g a | \break
              b a b d b d | e g e d b d | g fis g a g a | b g fis g4 }                 
         }
        }
  \score{
      <<
         \chords { d8 g2. d2. c4. g/b a:m d:7/fis
                   g2. d2. a4.:m g d:7/fis g
                   e:m g c g e:m g d2.:7
                   e4.:m g c g c d:7 g
         }
  
          \context Staff="default"
          {
              \voicedefault 
          }
  
      >>
          \layout {
          }
          \midi {}
  }