0001_vvv

    loading [Config]:  ./tests/modtests/0001/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/modtests/0001
                 WorkDir -> refdir
              AbsWorkDir -> /up_project/up/tests/modtests/0001
                TaskFile -> up.yml
                 Verbose -> vvv
              ModuleName -> self
               ShellType -> /bin/sh
           MaxCallLayers -> 8
                 Timeout -> 3600000
     MaxModuelCallLayers -> 256
               EntryTask -> Main
      ModRepoUsernameRef -> 
      ModRepoPasswordRef -> 
    work dir: /up_project/up/tests/modtests/0001
    -exec task: Main
    loading [Task]:  ./up.yml
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    Task1: [Main ==> Main: main entry ]
    -Step1: [: main job ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0
    })
    
    cmd( 1):
    echo "hello world"
    
    -
    hello world
    
    -
     .. ok
    . ok
    -Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "last_result": (*utils.ExecResult)({
        Cmd: "echo \"hello world\"",
        Code: 0,
        Output: "hello world",
        ErrMsg: ""
      }),
      "up_runtime_task_layer_number": 0
    })
    
    =Task2: [Main ==> internal_task:  ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "last_result": (*utils.ExecResult)({
        Cmd: "echo \"hello world\"",
        Code: 0,
        Output: "hello world",
        ErrMsg: ""
      }),
      "up_runtime_task_layer_number": 1
    })
    
    ~~SubStep1: [print:  ]
    this is a internal task
    -Step3:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 1,
      "last_result": (*utils.ExecResult)({
        Cmd: "echo \"hello world\"",
        Code: 0,
        Output: "hello world",
        ErrMsg: ""
      })
    })
    
    loading [Config]:  ./upconfig.yml
    loading [Task]:  ./up.yml
    module: [hello-module], instance id: [nonamed], exec profile: []
     WARN: [*be aware*] - [both instance id and exec profile are not set]
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    =>call module: [hello-module] task: [Say_world]
    Task2: [TODO: Main Caller Taskname ==> Say_world:  ]
    -Step1:
    hello-module: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_tasker_layer_number": 2,
      "a": "aaa",
      "last_result": (*utils.ExecResult)({
        Cmd: "echo \"hello world\"",
        Code: 0,
        Output: "hello world",
        ErrMsg: ""
      }),
      "up_runtime_task_layer_number": 0
    })
    
    ~SubStep1: [print:  ]
    ... world