(List
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('about', {[DQ [LIT_CHARS "Given a grep expression, creates a graph of occurrences of that\n"][LIT_CHARS "expression in the recent history of the tree.\n"][LIT_CHARS "\n"][LIT_CHARS "Prerequisites: git and GNU R (apt-get install r-base).\n"]]})])
  (Com {[LIT_CHARS set]} {[LIT_CHARS -e]})
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('target', {[DQ [VarSub 1]]})])
  (If
    (Com {[LIT_OTHER "["]} {[LIT_CHARS -z]} {[VarSub target]} {[LIT_OTHER "]"]})
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "usage: "][VarSub 0][LIT_CHARS " <grep-compatible expression>"]]})
      (Com {[LIT_CHARS echo]})
      (Com {[LIT_CHARS echo]} {[DQ [VarSub about]]})
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]})
    )
  )
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('datafile', {[ComSub (Com {[LIT_CHARS mktemp]} {[LIT_CHARS -t]} {[LIT_CHARS tmp.XXXXXXXXXX]})]})])
  (Com {[LIT_CHARS trap]} {[DQ [LIT_CHARS "rm -f "][VarSub datafile]]} {[LIT_CHARS EXIT]})
  (Com {[LIT_CHARS echo]} {[SQ <LIT_CHARS "ago count">]}
    <
    (FilenameRedirectNode filename={[VarSub datafile]} <REDIR_GREAT ">"> 1),
    >
  )
  (For ago [{[LIT_LBRACE "{"] [LIT_CHARS 90..0] [LIT_RBRACE "}"]}])
    (List
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('commit', {[ComSub (Com {[LIT_CHARS git]} {[LIT_CHARS rev-list]} {[LIT_CHARS -1]} {[LIT_CHARS --until] [LIT_OTHER "="] [DQ [VarSub ago][LIT_CHARS " days ago"]]} {[LIT_CHARS origin/trunk]})]})])
      (Com {[LIT_CHARS git]} {[LIT_CHARS checkout]} {[LIT_CHARS -q]} {[LIT_CHARS -f]} {[VarSub commit]})
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('count', {[ComSub (Pipeline (Com {[LIT_CHARS git]} {[LIT_CHARS grep]} {[LIT_CHARS -E]} {[DQ [VarSub target]]} {[LIT_CHARS --]} {[SQ <LIT_CHARS "*.cc">]} {[SQ <LIT_CHARS "*.h">]} {[SQ <LIT_CHARS "*.m">]} {[SQ <LIT_CHARS "*.mm">]}) (Com {[LIT_CHARS wc]} {[LIT_CHARS -l]}) )]})])
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS -][VarSub ago][LIT_CHARS " "][VarSub count]]}
        <
        (FilenameRedirectNode filename={[VarSub datafile]} <REDIR_DGREAT ">>"> 1),
        >
      )
      (Com {[LIT_CHARS echo]} {[LIT_CHARS -n]} {[SQ <LIT_CHARS .>]})
    )
  )
  (Com {[LIT_CHARS R]} {[LIT_CHARS CMD]} {[LIT_CHARS BATCH]} {[ComSub (Com redirects=[(HereDocRedirectNode here_end='EOF' do_expansion=True body_word={[DQ [LIT_CHARS "data = read.delim("][RIGHT_D_QUOTE "\""][VarSub datafile][RIGHT_D_QUOTE "\""][LIT_CHARS ", sep=' ')\n"][LIT_CHARS "png(width=600, height=300)\n"][LIT_CHARS "plot(count ~ ago, type="][RIGHT_D_QUOTE "\""][LIT_CHARS l][RIGHT_D_QUOTE "\""][LIT_CHARS ", main="][RIGHT_D_QUOTE "\""][VarSub target][RIGHT_D_QUOTE "\""][LIT_CHARS ", xlab='days ago', data=data)\n"]]} <REDIR_DLESS "<<"> 0)]{[LIT_CHARS cat]})]} {[LIT_CHARS /dev/null]})
  (Com {[LIT_CHARS echo]} {[LIT_CHARS done.]})
)