Automatic Variables In PowerShell - Attempting to detect differences between PowerShell and System.Management.Automation Custom PowerShell Host

_LogAutomaticVariables.ps1

function Log-VariableValue {
param (
 [string] $Name
)
  $varValue = $ExecutionContext.InvokeCommand.ExpandString("$" + $Name)
  Write-Host "`$$Name = '$varValue'"
}

# http://ss64.com/ps/syntax-automatic-variables.html
# https://www.safaribooksonline.com/library/view/windows-powershell-pocket/9780596521783/ch04.html
Write-Warning "_Automatic Variables_"
Log-VariableValue "$"
Log-VariableValue "?"
Log-VariableValue "^"
Log-VariableValue "_"
Log-VariableValue "args"
Log-VariableValue "ConfirmPreference"
Log-VariableValue "ConsoleFileName"
Log-VariableValue "CurrentlyExecutingCommand"
Log-VariableValue "DebugPreference"
Log-VariableValue "Error"
Log-VariableValue "ErrorActionPreference"
Log-VariableValue "ErrorView"
Log-VariableValue "Event"
Log-VariableValue "EventSubscriber"
Log-VariableValue "ExecutionContext"
Log-VariableValue "False"
Log-VariableValue "ForEach"
Log-VariableValue "FormatEnumerationLimit"
Log-VariableValue "Home"
Log-VariableValue "Host"
Log-VariableValue "Input"
Log-VariableValue "LastExitCode"
Log-VariableValue "LogEngineHealthEvent"
Log-VariableValue "LogCommandHealthEvent"
Log-VariableValue "LogCommandLifecycleEvent"
Log-VariableValue "LogProviderHealthEvent"
Log-VariableValue "LogProviderLifecycleEvent"
Log-VariableValue "Matches"
Log-VariableValue "MaximumAliasCount"
Log-VariableValue "MaximumDriveCount"
Log-VariableValue "MaximumErrorCount"
Log-VariableValue "MaximumFunctionCount"
Log-VariableValue "MaximumHistoryCount"
Log-VariableValue "MaximumVariableCount"
Log-VariableValue "MyInvocation"
Log-VariableValue "NestedPromptLevel"
Log-VariableValue "NULL"
Log-VariableValue "OFS" #Output field separator.
Log-VariableValue "OutputEncoding"
Log-VariableValue "PID"
Log-VariableValue "Profile"
Log-VariableValue "ProgressPreference"
Log-VariableValue "PSBoundParameters"
Log-VariableValue "PsCmdlet"
Log-VariableValue "PsCulture"
Log-VariableValue "PsDebugContext"
Log-VariableValue "PsHome"
Log-VariableValue "PsItem"
Log-VariableValue "PsScriptRoot"
Log-VariableValue "PsUICulture"
Log-VariableValue "PsVersionTable"
Log-VariableValue "Pwd"
Log-VariableValue "Sender"
Log-VariableValue "ShellID"
Log-VariableValue "SourceArgs"
Log-VariableValue "SourceEventArgs"
Log-VariableValue "StackTrace"
Log-VariableValue "This"
Log-VariableValue "Transcript"
Log-VariableValue "True"
Log-VariableValue "VerboseHelpErrors"
Log-VariableValue "VerbosePreference"
Log-VariableValue "WarningPreference"
Log-VariableValue "WhatIfPreference"

$host | Format-List * -Force | %{ Write-Output $_ }
$PSVersionTable | Format-List * -Force | %{ Write-Output $_ }
$MyInvocation | Format-List * -Force | %{ Write-Output $_ }
$PSBoundParameters | Format-List * -Force |  %{ Write-Output $_ }

Write-Output ""
Write-Output "_Profiles_" 
Write-Output "CurrentUserCurrentHost = '$($Profile.CurrentUserCurrentHost)'"
Write-Output "CurrentUserAllHosts = '$($Profile.CurrentUserAllHosts)'"
Write-Output "AllUsersCurrentHost = '$($Profile.AllUsersCurrentHost)'"
Write-Output "AllUsersAllHosts = '$($Profile.AllUsersAllHosts)'"

ChocoInternalHost.sh

$$ = ''
$? = 'True'
$^ = ''
$_ = ''
$args = ''
$ConfirmPreference = 'High'
$ConsoleFileName = ''
$CurrentlyExecutingCommand = ''
$DebugPreference = 'Continue'
$Error = ''
$ErrorActionPreference = 'Continue'
$ErrorView = 'NormalView'
$Event = ''
$EventSubscriber = ''
$ExecutionContext = 'System.Management.Automation.EngineIntrinsics'
$False = 'False'
$ForEach = ''
$FormatEnumerationLimit = '4'
$Home = 'C:\Users\rob'
$Host = 'System.Management.Automation.Internal.Host.InternalHost'
$Input = ''
$LastExitCode = ''
$LogEngineHealthEvent = ''
$LogCommandHealthEvent = ''
$LogCommandLifecycleEvent = ''
$LogProviderHealthEvent = ''
$LogProviderLifecycleEvent = ''
$Matches = ''
$MaximumAliasCount = '4096'
$MaximumDriveCount = '4096'
$MaximumErrorCount = '256'
$MaximumFunctionCount = '4096'
$MaximumHistoryCount = '4096'
$MaximumVariableCount = '4096'
$MyInvocation = 'System.Management.Automation.InvocationInfo'
$NestedPromptLevel = '0'
$NULL = ''
$OFS = ''
$OutputEncoding = 'System.Text.ASCIIEncoding'
$PID = '1508'
$Profile = ''
$ProgressPreference = 'Continue'
$PSBoundParameters = 'System.Management.Automation.PSBoundParametersDictionary'
$PsCmdlet = ''
$PsCulture = 'en-US'
$PsDebugContext = ''
$PsHome = 'C:\Windows\System32\WindowsPowerShell\v1.0'
$PsItem = ''
$PsScriptRoot = 'C:\ProgramData\chocolatey\lib\testprofile\tools'
$PsUICulture = 'en-US'
$PsVersionTable = 'System.Management.Automation.PSVersionHashTable'
$Pwd = 'C:\temp\temp_packages\testProfile'
$Sender = ''
$ShellID = 'Microsoft.PowerShell'
$SourceArgs = ''
$SourceEventArgs = ''
$StackTrace = ''
$This = ''
$Transcript = ''
$True = 'True'
$VerboseHelpErrors = ''
$VerbosePreference = 'Continue'
$WarningPreference = 'Continue'
$WhatIfPreference = 'False'

Microsoft.PowerShell.Commands.Internal.Format.FormatStartData
Microsoft.PowerShell.Commands.Internal.Format.GroupStartData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.GroupEndData
Microsoft.PowerShell.Commands.Internal.Format.FormatEndData
Microsoft.PowerShell.Commands.Internal.Format.FormatStartData
Microsoft.PowerShell.Commands.Internal.Format.GroupStartData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.GroupEndData
Microsoft.PowerShell.Commands.Internal.Format.FormatEndData
Microsoft.PowerShell.Commands.Internal.Format.FormatStartData
Microsoft.PowerShell.Commands.Internal.Format.GroupStartData
Microsoft.PowerShell.Commands.Internal.Format.FormatEntryData
Microsoft.PowerShell.Commands.Internal.Format.GroupEndData
Microsoft.PowerShell.Commands.Internal.Format.FormatEndData

_Profiles_
CurrentUserCurrentHost = ''
CurrentUserAllHosts = ''
AllUsersCurrentHost = ''
AllUsersAllHosts = ''

SystemPowerShell.sh

$$ = ''
$? = 'True'
$^ = ''
$_ = ''
$args = ''
$ConfirmPreference = 'High'
$ConsoleFileName = ''
$CurrentlyExecutingCommand = ''
$DebugPreference = 'SilentlyContinue'
$Error = ''
$ErrorActionPreference = 'Continue'
$ErrorView = 'NormalView'
$Event = ''
$EventSubscriber = ''
$ExecutionContext = 'System.Management.Automation.EngineIntrinsics'
$False = 'False'
$ForEach = ''
$FormatEnumerationLimit = '4'
$Home = 'C:\Users\rob'
$Host = 'System.Management.Automation.Internal.Host.InternalHost'
$Input = ''
$LastExitCode = '0'
$LogEngineHealthEvent = ''
$LogCommandHealthEvent = ''
$LogCommandLifecycleEvent = ''
$LogProviderHealthEvent = ''
$LogProviderLifecycleEvent = ''
$Matches = ''
$MaximumAliasCount = '4096'
$MaximumDriveCount = '4096'
$MaximumErrorCount = '256'
$MaximumFunctionCount = '4096'
$MaximumHistoryCount = '4096'
$MaximumVariableCount = '4096'
$MyInvocation = 'System.Management.Automation.InvocationInfo'
$NestedPromptLevel = '0'
$NULL = ''
$OFS = ''
$OutputEncoding = 'System.Text.ASCIIEncoding'
$PID = '2912'
$Profile = 'C:\Users\rob\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1'
$ProgressPreference = 'Continue'
$PSBoundParameters = 'System.Management.Automation.PSBoundParametersDictionary'
$PsCmdlet = ''
$PsCulture = 'en-US'
$PsDebugContext = ''
$PsHome = 'C:\Windows\System32\WindowsPowerShell\v1.0'
$PsItem = ''
$PsScriptRoot = 'C:\temp\temp_packages\testProfile\tools'
$PsUICulture = 'en-US'
$PsVersionTable = 'System.Management.Automation.PSVersionHashTable'
$Pwd = 'C:\Users\rob'
$Sender = ''
$ShellID = 'Microsoft.PowerShell'
$SourceArgs = ''
$SourceEventArgs = ''
$StackTrace = ''
$This = ''
$Transcript = ''
$True = 'True'
$VerboseHelpErrors = ''
$VerbosePreference = 'SilentlyContinue'
$WarningPreference = 'Continue'
$WhatIfPreference = 'False'


Name             : ConsoleHost
Version          : 3.0
InstanceId       : 8e335671-fcee-446f-9e43-7dd18b8fa6e0
UI               : System.Management.Automation.Internal.Host.InternalHostUserI
                   nterface
CurrentCulture   : en-US
CurrentUICulture : en-US
PrivateData      : Microsoft.PowerShell.ConsoleHost+ConsoleColorProxy
IsRunspacePushed : False
Runspace         : System.Management.Automation.Runspaces.LocalRunspace

Key   : PSVersion
Value : 3.0
Name  : PSVersion

Key   : WSManStackVersion
Value : 3.0
Name  : WSManStackVersion

Key   : SerializationVersion
Value : 1.1.0.1
Name  : SerializationVersion

Key   : CLRVersion
Value : 4.0.30319.34209
Name  : CLRVersion

Key   : BuildVersion
Value : 6.2.9200.16398
Name  : BuildVersion

Key   : PSCompatibleVersions
Value : {1.0, 2.0, 3.0}
Name  : PSCompatibleVersions

Key   : PSRemotingProtocolVersion
Value : 2.2
Name  : PSRemotingProtocolVersion


MyCommand             : chocolateyinstall.ps1
BoundParameters       : {}
UnboundArguments      : {}
ScriptLineNumber      : 1
OffsetInLine          : 1
HistoryId             : 10
ScriptName            :
Line                  : & C:\temp\temp_packages\testProfile\tools\chocolateyins
                        tall.ps1
PositionMessage       : At line:1 char:1
                        + & C:\temp\temp_packages\testProfile\tools\chocolateyi
                        nstall.ps1
                        + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                        ~~~~~~~~~~
PSScriptRoot          :
PSCommandPath         :
InvocationName        : &
PipelineLength        : 1
PipelinePosition      : 1
ExpectingInput        : False
CommandOrigin         : Runspace
DisplayScriptPosition :
  
_Profiles_
CurrentUserCurrentHost = 'C:\Users\rob\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1'
CurrentUserAllHosts = 'C:\Users\rob\Documents\WindowsPowerShell\profile.ps1'
AllUsersCurrentHost = 'C:\Windows\System32\WindowsPowerShell\v1.0\Microsoft.PowerShell_profile.ps1'
AllUsersAllHosts = 'C:\Windows\System32\WindowsPowerShell\v1.0\profile.ps1'

$psscriptroot is different due to where the two packages were executed.