start
  = (step)+
  
step
  = key:keytoken [ ]* '=' value:valuetoken ';' {return [key, value]}

valuetoken 
  = [ ]* t:(doublequoted / singlequoted / plainvalue) [ ]* {return t.join('')}

doublequoted
  = ('"' enc:[^"]+ '"' {return enc})

singlequoted
  = ("'" enc:[^']+ "'" {return enc})
  
plainvalue
  = (text:[^;=]+ {return [text.join('').trim()]})

keytoken
  = key:(('==' {return '='}) / [^=])+ {return key.join('').trim()}

  /*
  npm install --global pegjs
  pegjs --format commonjs --output grammar.peg.js ./grammar.peg
  */