Powershell Do Loop

Question

I'm new at powershell and i need some help to end my code. Everything is ok but i need on ELSE go back to DO doing a loop. How can i solve this?

  DO {
      $getinfo=Get-Content $wblogpath | Select-Object -last 1 
      Write-Host -NoNewline "."$counter
      Start-Sleep -s 1
      $counter++
     }
  WHILE ($getinfo -notlike '*ReadyToRun->Run*' -and 
         $getinfo -notlike '*test*' -and
         $getinfo -notlike '*error*' -and
         $counter -le 8)

  IF ($getinfo -like '*ReadyToRun->Run*')
      {
       Write-Host "`nREADY TO RUN"
      }
  ELSEIF ($getinfo -like '*test*') 
      {
       Write-Host "`ntest"
      }
  ELSEIF ($getinfo -like '*error*') 
      {
       Write-Host "`nerror"
      }
  ELSE{
       Write-Host "`nRESTARTing WINBASIS"
       $counter=0
      }

Thanks :)

Short answer: impossible. Powershell can not jump between lines like vbs does. You must find a way to achive your needs in your do-while-expression. — restless1987
– restless1987, Commented Nov 3, 2016 at 18:02
Possible duplicate of Jumping around to certain spots in script — TessellatingHeckler
– TessellatingHeckler, Commented Nov 3, 2016 at 21:37

Esperento57 · Accepted Answer · 2016-11-03 18:31:30Z

1

with recursive method

     function myfunction()
     {
     DO {
           $wblogpath="C:\temp\test.csv"
           $getinfo=Get-Content $wblogpath | Select-Object -last 1 
           Write-Host -NoNewline "."$counter
           Start-Sleep -s 1
           $counter++
          }
       WHILE ($getinfo -notlike '*ReadyToRun->Run*' -and 
              $getinfo -notlike '*test*' -and
              $getinfo -notlike '*error*' -and
              $counter -le 8)

       IF ($getinfo -like '*ReadyToRun->Run*')
           {
            Write-Host "`nREADY TO RUN"
           }
       ELSEIF ($getinfo -like '*test*') 
           {
            Write-Host "`ntest"
           }
       ELSEIF ($getinfo -like '*error*') 
           {
            Write-Host "`nerror"
           }
       ELSE{
            Write-Host "`nRESTARTing WINBASIS"
            $counter=0
            myfunction
           }
     }

     myfunction

answered Nov 3, 2016 at 18:31

Esperento57

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2 Comments

Walter Mitty Over a year ago

The use of recursion is clever. One has to make sure the stack doesn't get too deep, and I don't know how deep that is.

TessellatingHeckler Over a year ago

Looks like PSv3 and above have a dynamic call depth limit, but don't support tail call optimization (at least PSv4 doesn't). A simple test on my computer throws a 'call depth overflow' exception after ~5k calls, so this answer will - at some point - stop looping and break.

TessellatingHeckler · Accepted Answer · 2016-11-03 21:34:50Z

1

Simply wrap all your code in another loop.

DO {

    #your code here#

} WHILE ($true)

answered Nov 3, 2016 at 21:34

TessellatingHeckler

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