PowerShell Cmdlet in Dyalog APL proof of concept

notes.dyalog

⍝ This is in a workspace, default namespace
⍝ created by )Ed ○InvokeAplExpression

⍝ Then exported as a Microsoft .Net Assembly
⍝ With the Isolation Mode dropdown set to 
⍝ 'Each assembly attempts to use local bridge and interpreter libraries'

⍝ pre-req: make a project folder e.g. "D:\m\" and copy file
⍝ System.Management.Automation.dll from the .Net GAC into it. 
⍝ PS> Copy-Item -Path ([psobject].Assembly.Location) -Destination 'd:\m\' -Verbose
⍝ (this path is in the :Using line, because loading from the GAC doesn't find it)

⍝ After exporting the DLL open an Admin PowerShell session, and:
⍝ 1) copy the DLL to the Dyalog folder, so it can find the bridge DLLs
⍝ PS> Copy-Item D:\m\AplTest.dll 'C:\Program Files\Dyalog\Dyalog APL-64 17.1 Unicode\'

⍝ 2) change to folder
⍝ PS> cd 'C:\Program Files\Dyalog\Dyalog APL-64 17.1 Unicode\'

⍝ 3) import it
⍝ PS> Import-Module .\AplTest.dll -Verbose

⍝ 4) check for exported cmdlets, should be one
⍝ PS> Get-command -module apltest

⍝ 5) run it, get output 1 2 3
⍝ PS> Invoke-AplExpression

:Class InvokeAplExpression : Cmdlet
:Using System
:Using System.Management.Automation,D:\m\System.Management.Automation.dll
:Access public 
    :Attribute CmdletAttribute VerbsLifecycle.Invoke 'AplExpression'
 
     ⍝ This field needs ParameterAttribute
     ⍝ to allow PS> Invoke-AplExpression -AplCode '⍳ 5'
     ⍝ but this attempt doesn't work, the default '⍳ 3' only runs
    :Field Public Instance AplCode ← '⍳ 3'
    :Attribute ParameterAttribute

    ∇ BeginProcessing
      :Access protected override
      :Signature Void←BeginProcessing
      WriteObject(⊂⍎AplCode)
    ∇
:EndClass