condition with until

    goal:
    - introduce until key word to exit loop
    - deom 3 loop cases
    tasks:
    - name: task
      desc: main entry
      task:
      - func: cmd
        name: step1
        desc: demo it will loop until loopitem = item3
        do:
        - name: print
          cmd: '{{.loopitem}}'
        loop:
        - item1
        - item2
        - item3
        - item4
        until: '{{ eq .loopitem "item3" }}'
      - func: cmd
        name: step2
        do:
        - name: print
          cmd: hello
      - func: call
        name: step3
        do: subtask
        loop:
        - proc 1
        - proc 2
        - proc 3
        - proc 4
        until: '{{ eq .loopitem "proc 3" }}'
      - func: call
        name: step4
        do: subtask
        loop:
        - proc 1
        - proc 2
        - proc 3
        - proc 4
        until: '{{ eq .loopindex 3 }}'
      - func: call
        name: step5
        desc: it will stop loop at proc 4
        vars:
          person: jason
        do: subtask2
        loop:
        - proc 1
        - proc 2
        - proc 3
        - proc 4
        - proc 5
        - proc 6
        until: '{{ eq .person "tom" }}'
    - name: subtask
      desc: subtask to test reg and return
      task:
      - func: cmd
        name: step1
        desc: the loopitem here is inherited from caller
        do:
        - name: print
          cmd: '{{.loopitem}}'
    - name: subtask2
      task:
      - func: cmd
        do:
        - name: reg
          cmd:
            name: person
            value: tom
        if: '{{ eq .loopindex 3 }}'
      - func: cmd
        name: step2
        do:
        - name: print
          cmd: 'person: {{.person}}'
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> c0119
                 Verbose -> vvv
              ModuleName -> self
               ShellType -> /bin/sh
           MaxCallLayers -> 8
                 Timeout -> 3600000
     MaxModuelCallLayers -> 256
               EntryTask -> task
      ModRepoUsernameRef -> 
      ModRepoPasswordRef -> 
    work dir: /up_project/up
    -exec task: task
    loading [Task]:  ./tests/functests/c0119
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    Task1: [task ==> task: main entry ]
    -Step1: [step1: demo it will loop until loopitem = item3 ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0
    })
    
    ~SubStep1: [print:  ]
    item1
    ~SubStep1: [print:  ]
    item2
    -Step2: [step2:  ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0
    })
    
    ~SubStep1: [print:  ]
    hello
    -Step3: [step3:  ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0
    })
    
    =Task2: [task ==> subtask: subtask to test reg and return ]
    --Step1: [step1: the loopitem here is inherited from caller ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "loopitem": "proc 1",
      "loopindex": 0,
      "loopindex1": 1
    })
    
    ~~SubStep1: [print:  ]
    proc 1
    =Task2: [task ==> subtask: subtask to test reg and return ]
    --Step1: [step1: the loopitem here is inherited from caller ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopindex": 1,
      "loopindex1": 2,
      "up_runtime_task_layer_number": 1,
      "loopitem": "proc 2"
    })
    
    ~~SubStep1: [print:  ]
    proc 2
    -Step4: [step4:  ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1
    })
    
    =Task2: [task ==> subtask: subtask to test reg and return ]
    --Step1: [step1: the loopitem here is inherited from caller ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "loopitem": "proc 1",
      "loopindex": 0,
      "loopindex1": 1
    })
    
    ~~SubStep1: [print:  ]
    proc 1
    =Task2: [task ==> subtask: subtask to test reg and return ]
    --Step1: [step1: the loopitem here is inherited from caller ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopitem": "proc 2",
      "loopindex": 1,
      "loopindex1": 2,
      "up_runtime_task_layer_number": 1
    })
    
    ~~SubStep1: [print:  ]
    proc 2
    =Task2: [task ==> subtask: subtask to test reg and return ]
    --Step1: [step1: the loopitem here is inherited from caller ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopitem": "proc 3",
      "loopindex": 2,
      "loopindex1": 3,
      "up_runtime_task_layer_number": 1
    })
    
    ~~SubStep1: [print:  ]
    proc 3
    -Step5: [step5: it will stop loop at proc 4 ]
    self: final context exec vars:
    
    (*core.Cache)({
      "person": "jason",
      "up_runtime_task_layer_number": 1
    })
    
    =Task3: [task ==> subtask2:  ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "person": "jason",
      "loopitem": "proc 1",
      "loopindex": 0,
      "loopindex1": 1,
      "up_runtime_task_layer_number": 1
    })
    
    condition failed, skip executing step 
    
    --Step2: [step2:  ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopindex": 0,
      "loopindex1": 1,
      "up_runtime_task_layer_number": 1,
      "person": "jason",
      "loopitem": "proc 1"
    })
    
    ~~SubStep1: [print:  ]
    person: jason
    =Task3: [task ==> subtask2:  ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "person": "jason",
      "loopitem": "proc 2",
      "loopindex": 1,
      "loopindex1": 2
    })
    
    condition failed, skip executing step 
    
    --Step2: [step2:  ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopindex": 1,
      "loopindex1": 2,
      "up_runtime_task_layer_number": 1,
      "person": "jason",
      "loopitem": "proc 2"
    })
    
    ~~SubStep1: [print:  ]
    person: jason
    =Task3: [task ==> subtask2:  ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "person": "jason",
      "loopitem": "proc 3",
      "loopindex": 2,
      "loopindex1": 3
    })
    
    condition failed, skip executing step 
    
    --Step2: [step2:  ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "person": "jason",
      "loopitem": "proc 3",
      "loopindex": 2,
      "loopindex1": 3
    })
    
    ~~SubStep1: [print:  ]
    person: jason
    =Task3: [task ==> subtask2:  ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "person": "jason",
      "loopitem": "proc 4",
      "loopindex": 3,
      "loopindex1": 4
    })
    
    ~~SubStep1: [reg:  ]
    --Step2: [step2:  ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopindex1": 4,
      "up_runtime_task_layer_number": 1,
      "person": "tom",
      "loopitem": "proc 4",
      "loopindex": 3
    })
    
    ~~SubStep1: [print:  ]
    person: tom