Validate an arbitrary number of PowerShell script parameters












1














It is possible in PowerShell to validate the parameters passed to a script and also enables auto completion, as seen below:



myscript.ps1:



param([Parameter(Mandatory=$false)][String][ValidateSet('abc',
'def',
'ghi')] $argument
)


But this only enables the auto completion for the first argument. I want number of "auto complete"-able parameters to be arbitrary.



Therefore after typing:





  • PS C:> .myscript.ps1 def (additional white space at the end) and

  • pressing tab, I want the possible parameters to be auto completed again PS C:> .myscript.ps1 def abs


How do I code this in the param(...) part?










share|improve this question



























    1














    It is possible in PowerShell to validate the parameters passed to a script and also enables auto completion, as seen below:



    myscript.ps1:



    param([Parameter(Mandatory=$false)][String][ValidateSet('abc',
    'def',
    'ghi')] $argument
    )


    But this only enables the auto completion for the first argument. I want number of "auto complete"-able parameters to be arbitrary.



    Therefore after typing:





    • PS C:> .myscript.ps1 def (additional white space at the end) and

    • pressing tab, I want the possible parameters to be auto completed again PS C:> .myscript.ps1 def abs


    How do I code this in the param(...) part?










    share|improve this question

























      1












      1








      1


      0





      It is possible in PowerShell to validate the parameters passed to a script and also enables auto completion, as seen below:



      myscript.ps1:



      param([Parameter(Mandatory=$false)][String][ValidateSet('abc',
      'def',
      'ghi')] $argument
      )


      But this only enables the auto completion for the first argument. I want number of "auto complete"-able parameters to be arbitrary.



      Therefore after typing:





      • PS C:> .myscript.ps1 def (additional white space at the end) and

      • pressing tab, I want the possible parameters to be auto completed again PS C:> .myscript.ps1 def abs


      How do I code this in the param(...) part?










      share|improve this question













      It is possible in PowerShell to validate the parameters passed to a script and also enables auto completion, as seen below:



      myscript.ps1:



      param([Parameter(Mandatory=$false)][String][ValidateSet('abc',
      'def',
      'ghi')] $argument
      )


      But this only enables the auto completion for the first argument. I want number of "auto complete"-able parameters to be arbitrary.



      Therefore after typing:





      • PS C:> .myscript.ps1 def (additional white space at the end) and

      • pressing tab, I want the possible parameters to be auto completed again PS C:> .myscript.ps1 def abs


      How do I code this in the param(...) part?







      powershell






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 22 at 18:41









      user69453

      602723




      602723
























          1 Answer
          1






          active

          oldest

          votes


















          3














          If you do want to pass values as individual arguments separated with whitespace, use the ValueFromRemainingArguments parameter attribute:



          param(
          [Parameter(ValueFromRemainingArguments)]
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          Note that $argument is now an array of values, in which PowerShell collects all positional arguments for you.



          The potential down-side is that this subjects all positional arguments to the validation, so if you also need to pass other arguments, you'll have to prefix them with the parameter name (e.g., -foo bar).





          Therefore, consider using a single, explicitly array-valued parameter instead:



          param(
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          That way, $argument will receive multiple values if passed with , as the separator, and in addition to tab-completing the 1st value, each additional one after typing , can be tab-completed too.



          ./myscript a<tab>  # -> ./myscript abc

          ./myscript abc, d<tab< # -> ./myscript abc, def





          share|improve this answer























          • My pleasure, @user69453; glad to hear it helped.
            – mklement0
            Nov 22 at 19:54











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          1 Answer
          1






          active

          oldest

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          active

          oldest

          votes






          active

          oldest

          votes









          3














          If you do want to pass values as individual arguments separated with whitespace, use the ValueFromRemainingArguments parameter attribute:



          param(
          [Parameter(ValueFromRemainingArguments)]
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          Note that $argument is now an array of values, in which PowerShell collects all positional arguments for you.



          The potential down-side is that this subjects all positional arguments to the validation, so if you also need to pass other arguments, you'll have to prefix them with the parameter name (e.g., -foo bar).





          Therefore, consider using a single, explicitly array-valued parameter instead:



          param(
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          That way, $argument will receive multiple values if passed with , as the separator, and in addition to tab-completing the 1st value, each additional one after typing , can be tab-completed too.



          ./myscript a<tab>  # -> ./myscript abc

          ./myscript abc, d<tab< # -> ./myscript abc, def





          share|improve this answer























          • My pleasure, @user69453; glad to hear it helped.
            – mklement0
            Nov 22 at 19:54
















          3














          If you do want to pass values as individual arguments separated with whitespace, use the ValueFromRemainingArguments parameter attribute:



          param(
          [Parameter(ValueFromRemainingArguments)]
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          Note that $argument is now an array of values, in which PowerShell collects all positional arguments for you.



          The potential down-side is that this subjects all positional arguments to the validation, so if you also need to pass other arguments, you'll have to prefix them with the parameter name (e.g., -foo bar).





          Therefore, consider using a single, explicitly array-valued parameter instead:



          param(
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          That way, $argument will receive multiple values if passed with , as the separator, and in addition to tab-completing the 1st value, each additional one after typing , can be tab-completed too.



          ./myscript a<tab>  # -> ./myscript abc

          ./myscript abc, d<tab< # -> ./myscript abc, def





          share|improve this answer























          • My pleasure, @user69453; glad to hear it helped.
            – mklement0
            Nov 22 at 19:54














          3












          3








          3






          If you do want to pass values as individual arguments separated with whitespace, use the ValueFromRemainingArguments parameter attribute:



          param(
          [Parameter(ValueFromRemainingArguments)]
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          Note that $argument is now an array of values, in which PowerShell collects all positional arguments for you.



          The potential down-side is that this subjects all positional arguments to the validation, so if you also need to pass other arguments, you'll have to prefix them with the parameter name (e.g., -foo bar).





          Therefore, consider using a single, explicitly array-valued parameter instead:



          param(
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          That way, $argument will receive multiple values if passed with , as the separator, and in addition to tab-completing the 1st value, each additional one after typing , can be tab-completed too.



          ./myscript a<tab>  # -> ./myscript abc

          ./myscript abc, d<tab< # -> ./myscript abc, def





          share|improve this answer














          If you do want to pass values as individual arguments separated with whitespace, use the ValueFromRemainingArguments parameter attribute:



          param(
          [Parameter(ValueFromRemainingArguments)]
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          Note that $argument is now an array of values, in which PowerShell collects all positional arguments for you.



          The potential down-side is that this subjects all positional arguments to the validation, so if you also need to pass other arguments, you'll have to prefix them with the parameter name (e.g., -foo bar).





          Therefore, consider using a single, explicitly array-valued parameter instead:



          param(
          [ValidateSet('abc', 'def', 'ghi')]
          [string] $argument
          )


          That way, $argument will receive multiple values if passed with , as the separator, and in addition to tab-completing the 1st value, each additional one after typing , can be tab-completed too.



          ./myscript a<tab>  # -> ./myscript abc

          ./myscript abc, d<tab< # -> ./myscript abc, def






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 22 at 19:56

























          answered Nov 22 at 19:39









          mklement0

          126k20239267




          126k20239267












          • My pleasure, @user69453; glad to hear it helped.
            – mklement0
            Nov 22 at 19:54


















          • My pleasure, @user69453; glad to hear it helped.
            – mklement0
            Nov 22 at 19:54
















          My pleasure, @user69453; glad to hear it helped.
          – mklement0
          Nov 22 at 19:54




          My pleasure, @user69453; glad to hear it helped.
          – mklement0
          Nov 22 at 19:54


















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