(List
  (AndOr OP_OR_IF
    (Com {[LIT_OTHER "["]} {[LIT_CHARS -d]} {[LIT_CHARS html] [LIT_TILDE "~"]} {[LIT_OTHER "]"]})
    (Com {[LIT_CHARS mkdir]} {[LIT_CHARS html] [LIT_TILDE "~"]})
  )
  (Com {[LIT_CHARS a2x]} {[LIT_CHARS -D]} {[LIT_CHARS html] [LIT_TILDE "~"]} {[LIT_CHARS -d]} {[LIT_CHARS book]} {[LIT_CHARS -f]} {[LIT_CHARS xhtml]} {[LIT_CHARS --asciidoc-opts] [LIT_OTHER "="] [DQ [LIT_CHARS --unsafe]]} {[LIT_CHARS main.txt]})
)