Syntax:

(Summarized from the bootstrapper source code)

Start-EditorServices
      #Common to Every Parameter Set:
      [-HostName <String, Mandatory, Not Null or Empty>]
      [-HostProfileId <String, Mandatory, Not Null or Empty>]
      [-HostVersion <String, Mandatory, Not Null or Empty>]
      [-BundledModulesPath <String, Not Null or Empty>]
      [-LogPath <Not Null or Empty>]
      [-LogLevel <String: "Diagnostic", "Verbose", "Normal", "Warning", "Error"]
      [-SessionDetailsPath <String, Mandatory, Not Null or Empty>]
      [-EnableConsoleRepl <Switch>]
      [-UseLegacyReadLine <Switch>]
      [-DebugServiceOnly <Switch>]
      [-LanguageServiceOnly <Switch>]
      [-AdditionalModules <String[]>]
      [-FeatureFlags <String[]>]
      [-WaitForDebugger <Switch>]
      [-ConfirmInstall <Switch>]

      #NamedPipe Parameter Set (Default):
      [-LanguageServicePipeName = $null <String>]
      [-DebugServicePipeName = $null <String>]

      #Stdio Parameter Set:
      [-Stdio <Switch>]

      #NamedPipeSimplex Parameter Set:
      [-SplitInOutPipes <Switch>]
      [-LanguageServiceInPipeName <String>]
      [-LanguageServiceOutPipeName <String>]
      [-DebugServiceInPipeName = $null <String>]
      [-DebugServiceOutPipeName = $null <String>]

Details:

Synopsis (Also from the bootstrapper source code):

Starts the language and debug services from the PowerShellEditorServices module.

Description (Again, bootstrapper):

PowerShell Editor Services Bootstrapper Script:

This script contains startup logic for the PowerShell Editor Services module when launched by an editor. It handles the following tasks:

• Verifying the existence of dependencies like PowerShellGet
• Verifying that the expected version of the PowerShellEditorServices module is installed
• Installing the PowerShellEditorServices module if confirmed by the user
• Creating named pipes for the language and debug services to use (if using named pipes)
• Starting the language and debug services from the PowerShellEditorServices module

Developer/Contributor Details:

Assembly (Loaded by PowerShellEditorServices.psd1, the PSES module)

• When run by PowerShell Core, this is loaded:
  • 'bin/Core/Microsoft.PowerShell.EditorServices.Hosting.dll'
• On any other PowerShell:
  • 'bin/Desktop/Microsoft.PowerShell.EditorServices.Hosting.dll'

Assembly Source Code:

• PSES/src/PowerShellEditorServices.Hosting
  • per PowerShellEditorServices.Hosting.csproj, the ../PowerShellEditorServices/PowerShellEditorServices.csproj is included at compilation
• PSES/src/PowerShellEditorServices

Omnisharp Source Code:

• OmniSharp/csharp-language-server-protocol

Parameters:

HostName (Breakdown):

• Hostname is used primarily to generate Runspaces using a C# PShost object. This object abstractly represents the PowerShell host. The PShost.name field (Hostname) is a reader-friendly string, which can be used identify the PSHost object. PSHost objects can be used to list runspaces under the PowerShell host and identify the host's appdomain
  • Default Value: "PowerShell Editor Services Host" (set by HostStartupInfo then pulled into PSHost.name during PSInternalHost construction)
• It's secondary purpose is for logging

HostProfileId (Breakdown):

• HostProfileId is a filename prefix used to identify the profile.ps1 file used by PowerShell Editor Services.
  • Default Value: Microsoft.PowerShellEditorServices
  • Can be found in:
    • AllUsersAllHosts: "$( $profile.AllUsersAllHosts )/$( $HostProfileId )_profile.ps1"
    • AllUsersCurrentHost: "$( $profile.AllUsersCurrentHost )/$( $HostProfileId )_profile.ps1"
    • CurrentUserAllHosts: "$( $profile.CurrentUserAllHosts )/$( $HostProfileId )_profile.ps1"
    • CurrentUserCurrentHost: "$( $profile.CurrentUserCurrentHost )/$( $HostProfileId )_profile.ps1"