Rediger

What's New in PowerShell 7.7

PowerShell 7.7.0-preview.4 includes the following features, updates, and breaking changes. PowerShell 7.7.0-preview.4 is built on the .NET 11.0.100-preview.6 runtime.

For a complete list of changes, see the CHANGELOG in the GitHub repository.

Updated modules

PowerShell 7.7 includes the following updated modules:

  • Microsoft.PowerShell.PSResourceGet v1.3.0-preview1
  • PSReadLine v2.4.5

Breaking Changes

  • New-Guid now generates Version 7 (time-sortable) UUIDs by default instead of Version 4 (random). The output format is unchanged. Scripts that depend on fully random GUIDs should use [guid]::NewGuid() directly. (#27033)
  • Add ValidateNotNullOrEmpty attribute to the -Property of Format-Table, Format-List, and Format-Custom (#26552)
  • Use ArgumentException.ThrowIfNullOrEmpty for not-null-not-empty argument validation. (#26668)
    • The exception thrown changes to System.ArgumentException from System.Management.Automation.PSArgumentNullException.
  • Correct handling of explicit -[<Operator>]:$false parameter values in Where-Object (#26485) (Thanks @yotsuda!)

Tab completion improvements

  • Add tab completion for $PSBoundParameters.Keys switch cases and access patterns (#26483) (Thanks @yotsuda!)
  • Fix the regression in tab completing positional parameters (#27857)

Cmdlet improvements

  • Improve output file path determination for Invoke-WebRequest (#27872)
  • Improve Authorization header default and redirect behavior (#27873)
  • Add New-TemporaryDirectory cmdlet (#27549) (Thanks @KirtiRamchandani!)
  • Change New-Guid to generate UUID v7 by default (#27033) (Thanks @SufficientDaikon!)
  • Handle empty-string and null-value results returned from custom argument completer more properly (#27398)
  • Add missing resource strings for Get-WinEvent (#27397) (Thanks @MartinGC94!)
  • Improve Get-WinEvent -ListLog exception handling (#27395) (Thanks @MartinGC94!)
  • Update MaxVisitCount and MaxHashtableKeyCount if VisitorSafeValueContext indicates SkipLimitCheck is true for Import-PowerShellDataFile
  • Correct handling of explicit -<SwitchParameter>:$false parameter values for the following cmdlets:
    • ConvertFrom-Csv, ConvertTo-Csv, Export-Csv, and Import-Csv (#26719) (Thanks @yotsuda!)
    • Get-Random (#26457) (Thanks @yotsuda!)
    • Get-SecureRandom (#26460) (Thanks @yotsuda!)
    • Get-TimeZone (#26463) (Thanks @yotsuda!)
    • Get-Uptime (#26141) (Thanks @logiclrd!)
    • New-Guid (#26140) (Thanks @logiclrd!)
    • New-PSSession (#26469) (Thanks @yotsuda!)
    • Split-Path (#26474) (Thanks @yotsuda!)
    • Test-Connection (#26479) (Thanks @yotsuda!)
    • Where-Object (#26485) (Thanks @yotsuda!)
  • Add -ExcludeProperty parameter to Format-* cmdlets (#26514) (Thanks @yotsuda!)
  • Add -Extension parameter to Join-Path cmdlet (#26482) (Thanks @yotsuda!)
  • Make Export-Csv -Append and -NoHeader mutually exclusive (#26472) (Thanks @yotsuda!)
  • Mark -NoTypeInformation as obsolete no-op and evaluate -IncludeTypeInformation on by value on Csv cmdlets (#26719) (Thanks @yotsuda!)
  • Add SubjectAlternativeName property to the Signature object returned from Get-AuthenticodeSignature (#26252)
  • Add property and event for debug attach (#25788) (Thanks @jborean93!)
  • Add $PSApplicationOutputEncoding variable (#21219) (Thanks @jborean93!)
  • Add ToRegex method to WildcardPattern class (#26515) (Thanks @yotsuda!)
  • Update PowerShell Profile DSC resource manifests to allow null for content (#26929)
  • DSC v3 resource for PowerShell Profile (#26157)
  • Dynamically evaluate width of LastWriteTime for formatting output on Unix (#24624) (Thanks @MathiasMagnus!)
  • Fix formatting to properly handle the Reset VT sequences that appear in the middle of a string (#26424)
  • Fix Invoke-RestMethod to support read-only files in multipart form data (#26454) (Thanks @yotsuda!)
  • Fix memory leak in GetFileShares (#25896) (Thanks @xtqqczze!)
  • Fix NOTES section formatting in comment-based help (#26512) (Thanks @yotsuda!)
  • Fix Test-Json false positive errors when using oneOf or anyOf in schema (#26618) (Thanks @yotsuda!)
  • Fix the CLR internal error and null ref exception when running Show-Command with PowerShell API (#26669)
  • Handle null reference exception in CsvCommands.cs: ConvertPSObjectToCSV (#26144) (Thanks @mikkas456!)
  • Improve ValidateLength error message consistency and refactor validation tests (#25806) (Thanks @jorgeasaurus!)
  • Support TargetObject position in ParserErrors (#26649) (Thanks @jborean93!)
  • Add verbose message to Get-Service when properties cannot be returned (#27109) (Thanks @reabr!)
  • Fix Remove-Item confirmation message to use provider path instead (#27123) (Thanks @scuzqy!)
  • PSStyle: validate background index against BackgroundColorMap (#27106) (Thanks @cuiweixie!)

Engine improvements

  • Call CodeGeneration.EscapeSingleQuotedStringContent API in SyncCurrentLocationHandler (#27874)
  • Improve PowerShell Remoting Argument Validation (#27870)
  • Improve validation for data fragments for PSRP frame headers (#27871)
  • Add the xsd validation back for CIM cmdlets (#27869)
  • Fix PATH caching in CommandDiscovery code (#27809)
  • Fix FileOnlyEntry crashing on older versions of Windows (#27880)
  • Add support for new WLDP setting EnableFileOnlyEntry (#26752)
  • Fix the dot-sourcing behavior of pwsh -file for advanced-function scripts (#27727)
  • Fix progress bar rendering with double-width Unicode characters (#26185) (Thanks @yotsuda!)
  • Update PowerShell telemetry to respect the diagnostics and feedback setting on Windows (#27328)
  • Fix up default value for parameters with the in modifier (#26785) (Thanks @jborean93!)
  • Fix WSManInstance COM interface with ResourceURI (#26692) (Thanks @jborean93!)
  • Refactor the module path construction code to make it more robust and easier to maintain (#26565)
  • Fix checks for local user config file paths (#26269)
  • Delay update notification for one week to ensure all packages become available (#27095)
  • Disable AMSI content logging in release (#26235) (Thanks @xtqqczze!)
  • Add property and event for debug attach (#25788) (Thanks @jborean93!)
  • Enable usage in AppContainers (#27266)

Experimental features

PowerShell 7.7 includes the following experimental features.

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