powershell - Add Custom Argument Completer for Cmdlet? -

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how add dynamic argument tab completion powershell cmdlet?

when type , hit tab, i'd tab completion.

pm> paket-add -nuget fsharp.co

these values i'd use in example:

pm> paket-findpackages -searchtext fsharp.co fsharp.core fsharp.core.3 fsharp.configuration fsharp.core.fluent-3.1 fsharp.core.fluent-4.0 fsharp.compiler.tools fsharp.compatibility.scala fsharp.compatibility.ocaml fsharp.compiler.codedom fsharp.compiler.service fsharp.control.reactive fsharp.compatibility.haskell fsharp.compatibility.ocaml.numerics fsharp.compatibility.ocaml.format fsharp.compatibility.ocaml.system fsharp.collections.parallelseq fsharp.compatibility.standardml fsharp.compatibility.ocaml.lexyacc fsharp.control.asyncseq

i found this answer gave couple of helpful links , said should run get-content function:tabexpansion2:

enter image description here

it looks commandcompletion.completeinput needs implemented. thought read somewhere there hashtable of commands functions. if so, , how install custom ones? i'm using chocolatey distribute paket.powershell. here cmdlet code.

update 2015-06-20:

i ended getting work code here: https://github.com/fsprojects/paket/blob/76de1c44853ce09029ba157855525f435d951b85/src/paket.powershell/argumenttabcompletion.ps1

# https://github.com/mariuszwojcik/rabbitmqtools/blob/master/tabexpansions.ps1 function createcompletionresult([string]$text, [string]$value, [string]$tooltip) {     if ([string]::isnullorempty($value)) { return }     if ([string]::isnullorempty($text)) { $text = $value }     if ([string]::isnullorempty($tooltip)) { $tooltip = $value }     $completiontext = @{$true="'$value'"; $false=$value  }[$value -match "\w"]     $completiontext = $completiontext -replace '\[', '``[' -replace '\]', '``]'     new-object system.management.automation.completionresult $completiontext, $text, 'parametervalue', $tooltip | write }  $findpackages = {     param($commandname, $parametername, $wordtocomplete, $commandast, $fakeboundparameter)     paket-findpackages -searchtext $wordtocomplete -max 100 | % {         createcompletionresult $_ $_ $_ | write     } }  $findpackageversions = {     param($commandname, $parametername, $wordtocomplete, $commandast, $fakeboundparameter)     if (-not $fakeboundparameter.nuget){ return }     paket-findpackageversions -name $fakeboundparameter.nuget -max 100 | % {         createcompletionresult $_ $_ $_ | write     } }  # create , add $global:options list of completers # http://www.powertheshell.com/dynamicargumentcompletion/ if (-not $global:options) { $global:options = @{customargumentcompleters = @{};nativeargumentcompleters = @{}}}  $global:options['customargumentcompleters']['paket-add:nuget'] = $findpackages $global:options['customargumentcompleters']['paket-add:version'] = $findpackageversions  $function:tabexpansion2 = $function:tabexpansion2 -replace 'end\r\n{','end { if ($null -ne $options) { $options += $global:options} else {$options = $global:options}'

the completer param names important. renaming them make not work.

you may want @ tabexpansion++ module, designed make extending tab completion easier.

i played few minutes, , think want based on example:

import-module tabexpansion++  function paketaddnugetcompletion {     [argumentcompleter(parameter = 'nuget', command = 'paket-add')]     param($commandname, $parametername, $wordtocomplete, $commandast, $fakeboundparameter)      paket-findpackages -searchtext $wordtocomplete |         foreach-object {             # not quite sure property use off result, might work.             new-completionresult -completiontext $_          }    }

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