(List
  (Com {[LIT_CHARS set]} {[LIT_CHARS -o]} {[LIT_CHARS errexit]}  )
  (Com {[LIT_CHARS set]} {[LIT_CHARS -o]} {[LIT_CHARS nounset]}  )
  (If
    (Com {[LIT_DBRACKET_LIKE "["]} {[LIT_CHARS -z]} {[DQ [VarSub TARGET_STORAGE test_op=VS_TEST_COLON_HYPHEN {}]]} {[LIT_DBRACKET_LIKE "]"]}    )
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "TARGET_STORAGE variable unset - skipping migration"]]}      )
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 0]}      )
    )
  )
  (If
    (Com {[LIT_DBRACKET_LIKE "["]} {[LIT_CHARS -z]} {[DQ [VarSub TARGET_VERSION test_op=VS_TEST_COLON_HYPHEN {}]]} {[LIT_DBRACKET_LIKE "]"]}    )
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "TARGET_VERSION variable unset - skipping migration"]]}      )
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 0]}      )
    )
  )
  (If
    (Com {[LIT_DBRACKET_LIKE "["]} {[LIT_CHARS -z]} {[DQ [VarSub DATA_DIRECTORY test_op=VS_TEST_COLON_HYPHEN {}]]} {[LIT_DBRACKET_LIKE "]"]}    )
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "DATA_DIRECTORY variable unset - skipping migration"]]}      )
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 0]}      )
    )
  )
  (If
    (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [VarSub TARGET_STORAGE]]} {[LIT_NEQUAL "!="]} {[DQ [LIT_CHARS etcd2]]} {[LIT_CHARS -a]} {[DQ [VarSub TARGET_STORAGE]]} {[LIT_NEQUAL "!="]} {[DQ [LIT_CHARS etcd3]]} {[LIT_DBRACKET_LIKE "]"]}    )
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Not supported version of storage: "][VarSub TARGET_STORAGE]]}      )
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]}      )
    )
  )
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('SUPPORTED_VERSIONS_STRING', {[DQ [LIT_CHARS "2.2.1 2.3.7 3.0.13"]]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('SUPPORTED_VERSIONS', {[ComSub (Pipeline (Com {[LIT_CHARS echo]} {[DQ [VarSub SUPPORTED_VERSIONS_STRING]]}) (Com {[LIT_CHARS tr]} {[DQ [LIT_CHARS " "]]} {[DQ [\ LIT_ESCAPED_CHAR "\\n"]]}) )]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('VERSION_FILE', {[DQ [LIT_CHARS version.txt]]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CURRENT_STORAGE', {[DQ [LIT_CHARS etcd2]]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CURRENT_VERSION', {[DQ [LIT_CHARS 2.2.1]]})])
  (If
    (Com {[LIT_DBRACKET_LIKE "["]} {[LIT_CHARS -e]} {[DQ [VarSub DATA_DIRECTORY][LIT_CHARS /][VarSub VERSION_FILE]]} {[LIT_DBRACKET_LIKE "]"]}    )
    (List
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('VERSION_CONTENTS', {[DQ [ComSub (Com {[LIT_CHARS cat]} {[VarSub DATA_DIRECTORY] [LIT_CHARS /] [VarSub VERSION_FILE]})]]})])
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CURRENT_VERSION', {[DQ [ComSub (Pipeline (Com {[LIT_CHARS echo]} {[VarSub VERSION_CONTENTS]}) (Com {[LIT_CHARS cut]} {[LIT_CHARS -d]} {[SQ <LIT_CHARS />]} {[LIT_CHARS -f]} {[LIT_CHARS 1]}) )]]})])
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CURRENT_STORAGE', {[DQ [ComSub (Pipeline (Com {[LIT_CHARS echo]} {[VarSub VERSION_CONTENTS]}) (Com {[LIT_CHARS cut]} {[LIT_CHARS -d]} {[SQ <LIT_CHARS />]} {[LIT_CHARS -f]} {[LIT_CHARS 2]}) )]]})])
    )
  )
  (If
    (Com {[LIT_DBRACKET_LIKE "["]} {[LIT_OTHER "!"]} {[LIT_CHARS -d]} {[DQ [VarSub DATA_DIRECTORY]]} {[LIT_DBRACKET_LIKE "]"]}    )
    (Com {[LIT_CHARS mkdir]} {[LIT_CHARS -p]} {[DQ [VarSub DATA_DIRECTORY]]}    )
  )
  (If
    (Com {[LIT_DBRACKET_LIKE "["]} {[LIT_CHARS -z]} {[DQ [ComSub (Com {[LIT_CHARS ls]} {[LIT_CHARS -A]} {[VarSub DATA_DIRECTORY]})]]} {[LIT_DBRACKET_LIKE "]"]}    )
    (List
      (Com {[LIT_CHARS echo]} {[DQ [VarSub DATA_DIRECTORY][LIT_CHARS " is empty - skipping migration"]]}      )
      (Com {[LIT_CHARS echo]} {[DQ [VarSub TARGET_VERSION][LIT_CHARS /][VarSub TARGET_STORAGE]]}
        <
        (FilenameRedirectNode filename={[DQ [VarSub DATA_DIRECTORY][LIT_CHARS /][VarSub VERSION_FILE]]} <REDIR_GREAT ">"> 1),
        >
      )
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 0]}      )
    )
  )
  (FunctionDef start_etcd []
    (List
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ETCD_PORT', {[LIT_CHARS 18629]})])
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ETCD_PEER_PORT', {[LIT_CHARS 18630]})])
      (= scope=<EAssignScope.LOCAL 0> flags=0 words=[] bindings=[('ETCD_CMD', {[DQ [VarSub ETCD test_op=VS_TEST_COLON_HYPHEN {[LIT_SLASH /] [LIT_CHARS usr] [LIT_SLASH /] [LIT_CHARS local] [LIT_SLASH /] [LIT_CHARS bin] [LIT_SLASH /] [LIT_CHARS etcd-] [VarSub START_VERSION]}]]})])
      (= scope=<EAssignScope.LOCAL 0> flags=0 words=[] bindings=[('ETCDCTL_CMD', {[DQ [VarSub ETCDCTL test_op=VS_TEST_COLON_HYPHEN {[LIT_SLASH /] [LIT_CHARS usr] [LIT_SLASH /] [LIT_CHARS local] [LIT_SLASH /] [LIT_CHARS bin] [LIT_SLASH /] [LIT_CHARS etcdctl-] [VarSub START_VERSION]}]]})])
      (= scope=<EAssignScope.LOCAL 0> flags=0 words=[] bindings=[('API_VERSION', {[DQ [ComSub (Pipeline (Com {[LIT_CHARS echo]} {[VarSub START_STORAGE]}) (Com {[LIT_CHARS cut]} {[LIT_CHARS -c5-5]}) )]]})])
      (If
        (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [VarSub API_VERSION]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [LIT_CHARS 2]]} {[LIT_DBRACKET_LIKE "]"]}        )
        (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ETCDCTL_CMD', {[DQ [VarSub ETCDCTL_CMD][LIT_CHARS " --endpoint=http://127.0.0.1:"][VarSub ETCD_PORT][LIT_CHARS " set"]]})])
        (ElseTrue)
        (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ETCDCTL_CMD', {[DQ [VarSub ETCDCTL_CMD][LIT_CHARS " --endpoints=http://127.0.0.1:"][VarSub ETCD_PORT][LIT_CHARS " put"]]})])
      )
      (Fork
        (Com {[VarSub ETCD_CMD]} {[LIT_CHARS --data-dir] [LIT_DBRACKET_LIKE "="] [VarSub DATA_DIRECTORY]} {[LIT_CHARS --listen-client-urls]} {[LIT_CHARS http] [LIT_OTHER ":"] [LIT_CHARS //127.0.0.1] [LIT_OTHER ":"] [VarSub ETCD_PORT]} {[LIT_CHARS --advertise-client-urls]} {[LIT_CHARS http] [LIT_OTHER ":"] [LIT_CHARS //127.0.0.1] [LIT_OTHER ":"] [VarSub ETCD_PORT]} {[LIT_CHARS --listen-peer-urls]} {[LIT_CHARS http] [LIT_OTHER ":"] [LIT_CHARS //127.0.0.1] [LIT_OTHER ":"] [VarSub ETCD_PEER_PORT]} {[LIT_CHARS --initial-advertise-peer-urls]} {[LIT_CHARS http] [LIT_OTHER ":"] [LIT_CHARS //127.0.0.1] [LIT_OTHER ":"] [VarSub ETCD_PEER_PORT]}
          <
          (FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_DGREAT "1>>"> 1),
          (DescriptorRedirectNode target={[LIT_CHARS 1]} <REDIR_GREATAND "2>&"> 2),
          >
        )
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ETCD_PID', {[VarSub !]})])
      (For i [{[ComSub (Com {[LIT_CHARS seq]} {[LIT_CHARS 240]})]}])
        (List
          (Com {[VarSub ETCDCTL_CMD]} {[SQ <LIT_CHARS etcd_version>]} {[VarSub START_VERSION]}          more_env=[('ETCDCTL_API', {[DQ [VarSub API_VERSION]]})]           )
          (If
            (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [VarSub ?]]} {[LIT_CHARS -eq]} {[DQ [LIT_CHARS 0]]} {[LIT_DBRACKET_LIKE "]"]}            )
            (List
              (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Etcd on port "][VarSub ETCD_PORT][LIT_CHARS " is up."]]}              )
              (Com {[LIT_CHARS return]} {[LIT_CHARS 0]}              )
            )
          )
          (Com {[LIT_CHARS sleep]} {[LIT_CHARS 0.5]}          )
        )
      )
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Timeout while waiting for etcd on port "][VarSub ETCD_PORT]]}      )
      (Com {[LIT_CHARS return]} {[LIT_CHARS 1]}      )
    )
  )
  (FunctionDef stop_etcd []
    (List
      (AndOr OP_OR_IF
        (Com {[LIT_CHARS kill]} {[DQ [VarSub ETCD_PID test_op=VS_TEST_HYPHEN {}]]}
          <
          (FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT ">"> 1),
          (DescriptorRedirectNode target={[LIT_CHARS 1]} <REDIR_GREATAND "2>&"> 2),
          >
        )
        (Com {[LIT_OTHER ":"]}        )
      )
      (AndOr OP_OR_IF
        (Com {[LIT_CHARS wait]} {[DQ [VarSub ETCD_PID test_op=VS_TEST_HYPHEN {}]]}
          <
          (FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT ">"> 1),
          (DescriptorRedirectNode target={[LIT_CHARS 1]} <REDIR_GREATAND "2>&"> 2),
          >
        )
        (Com {[LIT_OTHER ":"]}        )
      )
    )
  )
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ATTACHLEASE', {[DQ [VarSub ATTACHLEASE test_op=VS_TEST_COLON_HYPHEN {[LIT_SLASH /] [LIT_CHARS usr] [LIT_SLASH /] [LIT_CHARS local] [LIT_SLASH /] [LIT_CHARS bin] [LIT_SLASH /] [LIT_CHARS attachlease]}]]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ROLLBACK', {[DQ [VarSub ROLLBACK test_op=VS_TEST_COLON_HYPHEN {[LIT_SLASH /] [LIT_CHARS usr] [LIT_SLASH /] [LIT_CHARS local] [LIT_SLASH /] [LIT_CHARS bin] [LIT_SLASH /] [LIT_CHARS rollback]}]]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('SKIP_STEP', {[LIT_CHARS true]})])
  (For step [{[VarSub SUPPORTED_VERSIONS]}])
    (List
      (If
        (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [VarSub step]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [VarSub CURRENT_VERSION]]} {[LIT_DBRACKET_LIKE "]"]}        )
        (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('SKIP_STEP', {[LIT_CHARS false]})])
        (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [VarSub SKIP_STEP]]} {[LIT_NEQUAL "!="]} {[DQ [LIT_CHARS true]]} {[LIT_DBRACKET_LIKE "]"]}        )
        (List
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('START_VERSION', {[DQ [VarSub step]]})])
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('START_STORAGE', {[DQ [VarSub CURRENT_STORAGE]]})])
          (If
            (Pipeline!
              (Com {[LIT_CHARS start_etcd]}              )
            )
            (List
              (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Starting etcd "][VarSub step][LIT_CHARS " failed"]]}              )
              (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]}              )
            )
          )
          (Com {[LIT_CHARS stop_etcd]}          )
        )
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CURRENT_VERSION', {[VarSub step]})])
      (Com {[LIT_CHARS echo]} {[DQ [VarSub CURRENT_VERSION][LIT_CHARS /][VarSub CURRENT_STORAGE]]}
        <
        (FilenameRedirectNode filename={[DQ [VarSub DATA_DIRECTORY][LIT_CHARS /][VarSub VERSION_FILE]]} <REDIR_GREAT ">"> 1),
        >
      )
      (If
        (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [ComSub (Pipeline (Com {[LIT_CHARS echo]} {[VarSub CURRENT_VERSION]}) (Com {[LIT_CHARS cut]} {[LIT_CHARS -c1-2]}) )]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [LIT_CHARS 3.]]} {[LIT_CHARS -a]} {[DQ [VarSub CURRENT_STORAGE]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [LIT_CHARS etcd2]]} {[LIT_CHARS -a]} {[DQ [VarSub TARGET_STORAGE]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [LIT_CHARS etcd3]]} {[LIT_DBRACKET_LIKE "]"]}        )
        (List
          (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Performing etcd2 -> etcd3 migration"]]}          )
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('START_VERSION', {[DQ [VarSub step]]})])
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('START_STORAGE', {[DQ [LIT_CHARS etcd3]]})])
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ETCDCTL_CMD', {[DQ [VarSub ETCDCTL test_op=VS_TEST_COLON_HYPHEN {[LIT_SLASH /] [LIT_CHARS usr] [LIT_SLASH /] [LIT_CHARS local] [LIT_SLASH /] [LIT_CHARS bin] [LIT_SLASH /] [LIT_CHARS etcdctl-] [VarSub START_VERSION]}]]})])
          (Com {[VarSub ETCDCTL_CMD]} {[LIT_CHARS migrate]} {[LIT_CHARS --data-dir] [LIT_DBRACKET_LIKE "="] [VarSub DATA_DIRECTORY]}          more_env=[('ETCDCTL_API', {[LIT_CHARS 3]})]           )
          (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Attaching leases to TTL entries"]]}          )
          (If
            (Pipeline!
              (Com {[LIT_CHARS start_etcd]}              )
            )
            (List
              (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Starting etcd "][VarSub step][LIT_CHARS " in v3 mode failed"]]}              )
              (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]}              )
            )
          )
          (Com {[VarSub ATTACHLEASE]} {[LIT_CHARS --etcd-address]} {[LIT_CHARS http] [LIT_OTHER ":"] [LIT_CHARS //127.0.0.1] [LIT_OTHER ":"] [VarSub ETCD_PORT]} {[LIT_CHARS --ttl-keys-prefix]} {[DQ [VarSub TTL_KEYS_DIRECTORY test_op=VS_TEST_COLON_HYPHEN {[LIT_SLASH /] [LIT_CHARS registry] [LIT_SLASH /] [LIT_CHARS events]}]]} {[LIT_CHARS --lease-duration]} {[LIT_CHARS 1h]}          )
          (Com {[LIT_CHARS stop_etcd]}          )
          (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CURRENT_STORAGE', {[DQ [LIT_CHARS etcd3]]})])
          (Com {[LIT_CHARS echo]} {[DQ [VarSub CURRENT_VERSION][LIT_CHARS /][VarSub CURRENT_STORAGE]]}
            <
            (FilenameRedirectNode filename={[DQ [VarSub DATA_DIRECTORY][LIT_CHARS /][VarSub VERSION_FILE]]} <REDIR_GREAT ">"> 1),
            >
          )
        )
      )
      (If
        (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [VarSub CURRENT_VERSION]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [VarSub TARGET_VERSION]]} {[LIT_CHARS -a]} {[DQ [VarSub CURRENT_STORAGE]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [VarSub TARGET_STORAGE]]} {[LIT_DBRACKET_LIKE "]"]}        )
        (Com {[LIT_CHARS break]}        )
      )
    )
  )
  (If
    (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [VarSub CURRENT_STORAGE]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [LIT_CHARS etcd3]]} {[LIT_CHARS -a]} {[DQ [VarSub TARGET_STORAGE]]} {[LIT_DBRACKET_LIKE "="]} {[DQ [LIT_CHARS etcd2]]} {[LIT_DBRACKET_LIKE "]"]}    )
    (List
      (If
        (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [ComSub (Pipeline (Com {[LIT_CHARS echo]} {[VarSub CURRENT_VERSION]}) (Com {[LIT_CHARS cut]} {[LIT_CHARS -c1-4]}) )]]} {[LIT_NEQUAL "!="]} {[DQ [LIT_CHARS 3.0.]]} {[LIT_CHARS -o]} {[DQ [VarSub TARGET_VERSION]]} {[LIT_NEQUAL "!="]} {[DQ [LIT_CHARS 2.3.7]]} {[LIT_DBRACKET_LIKE "]"]}        )
        (List
          (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "etcd3 -> etcd2 downgrade is supported only between 3.0.x and 2.3.7"]]}          )
          (Com {[LIT_CHARS return]} {[LIT_CHARS 0]}          )
        )
      )
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Performing etcd3 -> etcd2 rollback"]]}      )
      (Com {[VarSub ROLLBACK]} {[LIT_CHARS --data-dir]} {[DQ [VarSub DATA_DIRECTORY]]}      )
      (If
        (Com {[LIT_DBRACKET_LIKE "["]} {[DQ [VarSub ?]]} {[LIT_CHARS -ne]} {[DQ [LIT_CHARS 0]]} {[LIT_DBRACKET_LIKE "]"]}        )
        (List
          (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "Rollback to etcd2 failed"]]}          )
          (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]}          )
        )
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CURRENT_STORAGE', {[DQ [LIT_CHARS etcd2]]})])
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('CURRENT_VERSION', {[DQ [LIT_CHARS 2.3.7]]})])
      (Com {[LIT_CHARS echo]} {[DQ [VarSub CURRENT_VERSION][LIT_CHARS /][VarSub CURRENT_STORAGE]]}
        <
        (FilenameRedirectNode filename={[DQ [VarSub DATA_DIRECTORY][LIT_CHARS /][VarSub VERSION_FILE]]} <REDIR_GREAT ">"> 1),
        >
      )
    )
  )
)