Functions/GenXdev.Helpers/Test-UnattendedMode.ps1
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Part of PowerShell module : GenXdev.Helpers Original cmdlet filename : Test-UnattendedMode.ps1 Original author : René Vaessen / GenXdev Version : 1.300.2025 ################################################################################ Copyright (c) René Vaessen / GenXdev Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ################################################################################> ############################################################################### <# .SYNOPSIS Detects if PowerShell is running in unattended/automated mode .DESCRIPTION Analyzes various indicators to determine if PowerShell is running in an unattended or automated context, including pipeline analysis, environment variables, console redirection, and invocation context. When CallersInvocation is provided, it analyzes the pipeline position and count to determine if the function is being called as part of an automated pipeline or script execution. .PARAMETER CallersInvocation The caller's invocation information for pipeline and automation detection. Pass $MyInvocation from the calling function to analyze pipeline context. .EXAMPLE Test-UnattendedMode Returns a boolean indicating if running in unattended mode using standard detection. .EXAMPLE Test-UnattendedMode -CallersInvocation $MyInvocation Analyzes the caller's invocation context and returns a boolean result. .EXAMPLE Test-UnattendedMode -CallersInvocation $MyInvocation -Detailed Returns detailed analysis object with all indicators and pipeline information. .EXAMPLE function My-Function { $isUnattended = Test-UnattendedMode -CallersInvocation $MyInvocation if ($isUnattended) { Write-Verbose "Running in unattended mode, skipping interactive prompts" } } .NOTES The function combines multiple detection methods: - Environment variables (CI/CD systems) - Console redirection - Interactive session detection - PowerShell host type - Pipeline analysis (when CallersInvocation provided) - Console availability #> function Test-UnattendedMode { [CmdletBinding()] param( ############################################################################### [Parameter( Mandatory = $false, HelpMessage = "Caller's invocation info for pipeline and automation detection" )] [System.Management.Automation.InvocationInfo] $CallersInvocation, ############################################################################### [Parameter( Mandatory = $false, HelpMessage = "Return detailed analysis object instead of simple boolean" )] [switch] $Detailed ) begin { $unattendedIndicators = @() } process { # Check 1: Environment variables indicating CI/CD or automation $automationEnvVars = @( 'JENKINS_URL', 'GITHUB_ACTIONS', 'TF_BUILD', 'CI', 'BUILD_ID', 'RUNNER_OS', 'SYSTEM_TEAMPROJECT', 'TEAMCITY_VERSION', 'TRAVIS', 'APPVEYOR', 'CIRCLECI', 'GITLAB_CI', 'AZURE_PIPELINES' ) $hasAutomationEnv = @($automationEnvVars | Microsoft.PowerShell.Core\ForEach-Object { [Environment]::GetEnvironmentVariable($_) } | Microsoft.PowerShell.Core\Where-Object { $_ -ne $null }).Count -gt 0 if ($hasAutomationEnv) { $unattendedIndicators += "AutomationEnvironment" } # Check 2: Console redirection $hasRedirection = try { [Console]::IsInputRedirected -or [Console]::IsOutputRedirected } catch { $false } if ($hasRedirection) { $unattendedIndicators += "ConsoleRedirection" } # Check 3: Non-interactive environment $isNonInteractive = -not [Environment]::UserInteractive if ($isNonInteractive) { $unattendedIndicators += "NonInteractiveEnvironment" } # Check 4: PowerShell host indicators $automationHosts = @('ServerRemoteHost', 'Default Host', 'BackgroundHost') $isAutomationHost = $Host.Name -in $automationHosts if ($isAutomationHost) { $unattendedIndicators += "AutomationHost:$($Host.Name)" } # Check 5: No console window (for GUI apps calling PowerShell) $hasNoConsole = try { $null -eq [Console]::WindowWidth -or [Console]::WindowWidth -eq 0 } catch { $true } if ($hasNoConsole) { $unattendedIndicators += "NoConsoleWindow" } # Check 6: PowerShell execution parameters $hasNonInteractiveParam = try { $PSBoundParameters.NonInteractive -or (Microsoft.PowerShell.Utility\Get-Variable -Name PSBoundParameters -Scope 1 -ErrorAction SilentlyContinue -ValueOnly).NonInteractive } catch { $false } if ($hasNonInteractiveParam) { $unattendedIndicators += "NonInteractiveParameter" } # Check 7: Pipeline analysis (if CallersInvocation provided) if ($CallersInvocation) { $pipelineInfo = $CallersInvocation.PipelinePosition $pipelineLength = $CallersInvocation.PipelineLength # If we're in a multi-command pipeline (not just a single command) $isInPipeline = $pipelineLength -gt 1 # If we're not at the end of the pipeline (suggesting automated processing) $isNotPipelineEnd = $pipelineInfo -lt $pipelineLength # Check if called from a script file (not interactive) $isFromScript = -not [string]::IsNullOrEmpty($CallersInvocation.ScriptName) # Check command line context $commandLine = $CallersInvocation.Line $isAutomatedCommand = $commandLine -match '^\s*(foreach|%|\||;|&)' -or $commandLine -match '(Get-|Set-|Invoke-|Start-|Stop-).+\|' -or $commandLine -match '\$\w+\s*\|\s*' # Only flag as unattended if we have strong indicators # Being in a simple function call from console should not count as unattended $isInteractiveFunction = $Host.Name -eq 'ConsoleHost' -and $pipelineLength -eq 1 -and [string]::IsNullOrEmpty($CallersInvocation.ScriptName) if ($isInPipeline -and -not $isInteractiveFunction) { $unattendedIndicators += "MultiCommandPipeline:$pipelineInfo/$pipelineLength" } if ($isNotPipelineEnd -and -not $isInteractiveFunction) { $unattendedIndicators += "NotPipelineEnd" } if ($isFromScript) { # $unattendedIndicators += "ScriptFile:$([System.IO.Path]::GetFileName($CallersInvocation.ScriptName))" } if ($isAutomatedCommand -and -not $isInteractiveFunction) { $unattendedIndicators += "AutomatedCommandPattern" } } # Check 8: Current execution context (removed - too broad, flags user functions) # The CommandOrigin check was incorrectly flagging interactive console functions # as unattended mode, so this check has been removed. # Final determination $isUnattended = $unattendedIndicators.Count -gt 0 # Return detailed object or simple boolean if ($Detailed) { return [PSCustomObject]@{ IsUnattended = $isUnattended Indicators = $unattendedIndicators IndicatorCount = $unattendedIndicators.Count HostName = $Host.Name PipelinePosition = if ($CallersInvocation) { $CallersInvocation.PipelinePosition } else { $null } PipelineLength = if ($CallersInvocation) { $CallersInvocation.PipelineLength } else { $null } ScriptName = if ($CallersInvocation) { $CallersInvocation.ScriptName } else { $null } CommandLine = if ($CallersInvocation) { $CallersInvocation.Line } else { $null } } } # Return simple boolean by default return $isUnattended } } |