(List
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('USAGE', {[SQ <LIT_CHARS "[-p] [--max-count=<n>] [<since>..<limit>] [--pretty=<format>] [-m] [git-diff-tree options] [git-rev-list options]">]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('SUBDIRECTORY_OK', {[SQ <LIT_CHARS Yes>]})])
  (Com {[LIT_CHARS .]} {[LIT_CHARS git-sh-setup]})
  (AndOr OP_OR_IF
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('diff_tree_flags', {[ComSub (Com {[LIT_CHARS git-rev-parse]} {[LIT_CHARS --sq]} {[LIT_CHARS --no-revs]} {[LIT_CHARS --flags]} {[DQ [VarSub @]]})]})])
    (Com {[LIT_CHARS exit]})
  )
  (Case to_match={[DQ [VarSub 0]]}, pat_word_list=[[{[LIT_OTHER "*"] [LIT_CHARS whatchanged]}], [{[LIT_OTHER "*"] [LIT_CHARS show]}]]
    (List
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('count', {[SQ ]})])
      (AndOr OP_AND_IF
        (Com {[LIT_CHARS test]} {[LIT_CHARS -z]} {[DQ [VarSub diff_tree_flags]]})
        (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('diff_tree_flags', {[ComSub (Com {[LIT_CHARS git]} {[LIT_CHARS config]} {[LIT_CHARS --get]} {[LIT_CHARS whatchanged.difftree]})]})])
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('diff_tree_default_flags', {[SQ <LIT_CHARS "-c -M --abbrev">]})])
    )
    (List
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('count', {[LIT_CHARS -n1]})])
      (AndOr OP_AND_IF
        (Com {[LIT_CHARS test]} {[LIT_CHARS -z]} {[DQ [VarSub diff_tree_flags]]})
        (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('diff_tree_flags', {[ComSub (Com {[LIT_CHARS git]} {[LIT_CHARS config]} {[LIT_CHARS --get]} {[LIT_CHARS show.difftree]})]})])
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('diff_tree_default_flags', {[SQ <LIT_CHARS "--cc --always">]})])
    )
  )
  (AndOr OP_AND_IF
    (Com {[LIT_CHARS test]} {[LIT_CHARS -z]} {[DQ [VarSub diff_tree_flags]]})
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('diff_tree_flags', {[DQ [VarSub diff_tree_default_flags]]})])
  )
  (AndOr OP_AND_IF
    (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('rev_list_args', {[ComSub (Com {[LIT_CHARS git-rev-parse]} {[LIT_CHARS --sq]} {[LIT_CHARS --default]} {[LIT_CHARS HEAD]} {[LIT_CHARS --revs-only]} {[DQ [VarSub @]]})]})])
    (AndOr OP_AND_IF
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('diff_tree_args', {[ComSub (Com {[LIT_CHARS git-rev-parse]} {[LIT_CHARS --sq]} {[LIT_CHARS --no-revs]} {[LIT_CHARS --no-flags]} {[DQ [VarSub @]]})]})])
      (Pipeline
        (Com {[LIT_CHARS eval]} {[DQ [LIT_CHARS "git-rev-list "][VarSub count][LIT_CHARS " "][VarSub rev_list_args]]})
        (Com {[LIT_CHARS eval]} {[DQ [LIT_CHARS "git-diff-tree --stdin --pretty -r "][VarSub diff_tree_flags][LIT_CHARS " "][VarSub diff_tree_args]]})
        (Com {[VarSub PAGER test_op=VS_TEST_COLON_HYPHEN {[LIT_CHARS less]}]}
                more_env=[('LESS', {[DQ [VarSub LESS][LIT_CHARS " -S"]]})]
        )
      )
    )
  )
)