taskScope vars in callee

    vars:
      tom: this is tom
    tasks:
    - name: task
      task:
      - func: cmd
        dvars:
        - name: jerry
          value: this is jerry in task scope
          flags:
          - taskScope
        do:
        - name: print
          desc: this should print out the dvar value of jerry
          cmd: '{{.jerry}}'
      - func: call
        do:
        - subtask1
    - name: subtask1
      task:
      - func: cmd
        do:
        - name: print
          desc: this should print out the dvar value of jerry as it is declared jerry
            is in taskScope
          cmd: '{{.jerry}}'
        - name: trace
          cmd: ===>
      - func: cmd
        vars:
          jerry: jerry is overriden in local scope
        do:
        - name: print
          desc: |
            remember that the caller's vars should override callee's vars
            so jerry's value should the one from caller instead this local value
          cmd: '{{.jerry}}'
        - name: trace
          cmd: <===
        - name: trace
          cmd: '--->'
      - func: cmd
        do:
        - name: print
          desc: this should print out the jerry defined in caller's task var scope
          cmd: '{{.jerry}}'
        - name: trace
          cmd: <---
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> c0109
                 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/c0109
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    Task1: [task ==> task:  ]
    -Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "tom": "this is tom",
      "up_runtime_task_layer_number": 0,
      "jerry": "this is jerry in task scope"
    })
    
    ~SubStep1: [print: this should print out the dvar value of jerry ]
    this is jerry in task scope
    -Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "tom": "this is tom",
      "up_runtime_task_layer_number": 0,
      "jerry": "this is jerry in task scope"
    })
    
    =Task2: [task ==> subtask1:  ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "jerry": "this is jerry in task scope",
      "tom": "this is tom",
      "up_runtime_task_layer_number": 1
    })
    
    ~~SubStep1: [print: this should print out the dvar value of jerry as it is declared jerry is in taskScope ]
    this is jerry in task scope
    ~~SubStep2: [trace:  ]
    Trace:===>
    --Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "jerry": "this is jerry in task scope",
      "tom": "this is tom",
      "up_runtime_task_layer_number": 1
    })
    
    ~~SubStep1: [print: remember that the caller's vars should override callee's vars
    so jerry's value should the one from caller instead this local value
     ]
    this is jerry in task scope
    ~~SubStep2: [trace:  ]
    Trace:<===
    ~~SubStep3: [trace:  ]
    Trace:--->
    --Step3:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "jerry": "this is jerry in task scope",
      "tom": "this is tom"
    })
    
    ~~SubStep1: [print: this should print out the jerry defined in caller's task var scope ]
    this is jerry in task scope
    ~~SubStep2: [trace:  ]
    Trace:<---