basics

    dvars:
    - name: homedir
      value: '{{ env "HOME"}}'
      flags: [vvvv]
    - name: yourhome
      value: '{{ expandenv "Your path is set to $HOME" }} '
      flags: [vvvv]
    tasks:
    - name: task
      task:
      - func: cmd
        do:
        - name: print
          cmd: '{{.homedir}}'
        - name: print
          cmd: '{{.yourhome}}'
      - func: shell
        do:
        - echo """my home is at {{.homedir}}"""
        - echo """my home is at $HOME"""
        - echo """{{.yourhome}}"""
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> c0044
                 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/c0044
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    dvar> homedir:
    "/root"
    
    -
    /root
    dvar> yourhome:
    "Your path is set to /root "
    
    -
    Your path is set to /root 
    Task1: [task ==> task:  ]
    -Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "homedir": "/root",
      "yourhome": "Your path is set to /root ",
      "up_runtime_task_layer_number": 0
    })
    
    ~SubStep1: [print:  ]
    /root
    ~SubStep2: [print:  ]
    Your path is set to /root 
    -Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "homedir": "/root",
      "yourhome": "Your path is set to /root ",
      "up_runtime_task_layer_number": 0
    })
    
    cmd( 1):
    echo """my home is at {{.homedir}}"""
    
    -
    my home is at /root
    
    -
     .. ok
    cmd( 2):
    echo """my home is at $HOME"""
    
    -
    my home is at /root
    
    -
     .. ok
    cmd( 3):
    echo """{{.yourhome}}"""
    
    -
    Your path is set to /root 
    
    -
     .. ok
    . ok