(CommandList
  children: [
    (C {(echo)} {(DQ ("*** GET KERNEL BEGIN ***"))})
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:SRC_DIR)
          op: Equal
          rhs: 
            {
              (CommandSubPart
                command_list: (CommandList children:[(C {(pwd)})])
                left_token: <Left_CommandSub "$(">
                spids: [12 14]
              )
            }
          spids: [11]
        )
      ]
      spids: [11]
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:DOWNLOAD_URL)
          op: Equal
          rhs: 
            {
              (CommandSubPart
                command_list: 
                  (CommandList
                    children: [
                      (Pipeline
                        children: [
                          (C {(grep)} {(-i)} {(Lit_Other "^") (KERNEL_SOURCE_URL)} {(.config)})
                          (C {(cut)} {(-f2)} {(-d) (SQ <"=">)})
                        ]
                        negated: False
                      )
                    ]
                  )
                left_token: <Left_CommandSub "$(">
                spids: [21 41]
              )
            }
          spids: [20]
        )
      ]
      spids: [20]
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:ARCHIVE_FILE)
          op: Equal
          rhs: 
            {
              (BracedVarSub
                token: <VSub_Name DOWNLOAD_URL>
                suffix_op: (StringUnary op_id:VOp1_DPound arg_word:{("*") (Lit_Slash /)})
                spids: [48 53]
              )
            }
          spids: [47]
        )
      ]
      spids: [47]
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:USE_LOCAL_SOURCE)
          op: Equal
          rhs: 
            {
              (DQ 
                (CommandSubPart
                  command_list: 
                    (CommandList
                      children: [
                        (Pipeline
                          children: [
                            (C {(grep)} {(-i)} {(Lit_Other "^") (USE_LOCAL_SOURCE)} {(.config)})
                            (C {(cut)} {(-f2)} {(-d) (SQ <"=">)})
                          ]
                          negated: False
                        )
                      ]
                    )
                  left_token: <Left_CommandSub "$(">
                  spids: [61 81]
                )
              )
            }
          spids: [59]
        )
      ]
      spids: [59]
    )
    (If
      arms: [
        (if_arm
          cond: [
            (Sentence
              child: 
                (C {(Lit_Other "[")} {(DQ ($ VSub_Name "$USE_LOCAL_SOURCE"))} {(Lit_Other "=")} 
                  {(DQ (true))} {(-a)} {(KW_Bang "!")} {(-f)} {($ VSub_Name "$SRC_DIR") (/source/) ($ VSub_Name "$ARCHIVE_FILE")} 
                  {(Lit_Other "]")}
                )
              terminator: <Op_Semi ";">
            )
          ]
          action: [
            (C {(echo)} 
              {
                (DQ ("Source bundle ") ($ VSub_Name "$SRC_DIR") (/source/) ($ VSub_Name "$ARCHIVE_FILE") 
                  (" is missing and will be downloaded.")
                )
              }
            )
            (Assignment
              keyword: Assign_None
              pairs: [
                (assign_pair
                  lhs: (LhsName name:USE_LOCAL_SOURCE)
                  op: Equal
                  rhs: {(DQ (false))}
                  spids: [127]
                )
              ]
              spids: [127]
            )
          ]
          spids: [-1 113]
        )
      ]
      spids: [-1 132]
    )
    (C {(cd)} {(source)})
    (If
      arms: [
        (if_arm
          cond: [
            (Sentence
              child: 
                (C {(Lit_Other "[")} {(KW_Bang "!")} {(DQ ($ VSub_Name "$USE_LOCAL_SOURCE"))} 
                  {(Lit_Other "=")} {(DQ (true))} {(Lit_Other "]")}
                )
              terminator: <Op_Semi ";">
            )
          ]
          action: [
            (C {(echo)} {(DQ ("Downloading kernel source bundle from ") ($ VSub_Name "$DOWNLOAD_URL"))})
            (C {(wget)} {(-c)} {($ VSub_Name "$DOWNLOAD_URL")})
          ]
          spids: [-1 160]
        )
      ]
      else_action: [
        (C {(echo)} 
          {
            (DQ ("Using local kernel source bundle ") ($ VSub_Name "$SRC_DIR") (/source/) 
              ($ VSub_Name "$ARCHIVE_FILE")
            )
          }
        )
      ]
      spids: [181 193]
    )
    (C {(echo)} {(DQ ("Removing kernel work area. This may take a while..."))})
    (C {(rm)} {(-rf)} {(../work/kernel)})
    (C {(mkdir)} {(../work/kernel)})
    (C {(tar)} {(-xvf)} {($ VSub_Name "$ARCHIVE_FILE")} {(-C)} {(../work/kernel)})
    (C {(cd)} {($ VSub_Name "$SRC_DIR")})
    (C {(echo)} {(DQ ("*** GET KERNEL END ***"))})
  ]
)