(command.CommandList
  children: [
    (command.ShFunction
      name: gem_install
      body: 
        (BraceGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (command.Pipeline
                              children: [
                                (C {<gem>} {<list>})
                                (C {<grep>} {<-e>} {(DQ <'^'> ($ Id.VSub_Number '$1') <' '>)})
                              ]
                              negated: T
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (C {<sudo>} {<gem>} {<install>} {($ Id.VSub_DollarName '$i')} {<--no-ri>} {<--no-rdoc>})
                  ]
                  spids: [11 32]
                )
              ]
            )
          ]
        )
    )
    (C {<set>} {<-x>})
    (C {<gem_install>} {<foodcritic>})
    (C {<gem_install>} {<tailor>})
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:TOP)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: <Id.Left_Backtick '`'>
                child: (C {<git>} {<rev-parse>} {<--show-toplevel>})
              )
            }
          spids: [66]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {<Id.KW_Bang '!'>} {<-L>} 
                      {(DQ ($ Id.VSub_DollarName '$TOP') <'/.git/hooks/pre-commit'>)} {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (C {<ln>} {<-s>} {<'../../tests/pre-commit'>} 
              {(DQ ($ Id.VSub_DollarName '$TOP') <'/.git/hooks/pre-commit'>)}
            )
          ]
          spids: [77 93]
        )
      ]
    )
  ]
)