Add New-TemporaryDirectory cmdlet #26679
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Adds a new cmdlet that creates a temporary directory, following the same pattern as New-TemporaryFile. This is useful for users in Constrained Language Mode who cannot use [System.IO] directly. The cmdlet generates a unique directory name using Path.GetRandomFileName() and creates it in the system temp path. Fixes PowerShell#25754
iSazonov
reviewed
Jan 12, 2026
| /// </summary> | ||
| protected override void EndProcessing() | ||
| { | ||
| string tempPath = Path.GetTempPath(); |
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Do you consider Directory.CreateTempSubdirectory() ?
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This adds a New-TemporaryDirectory cmdlet that follows the same pattern as New-TemporaryFile. The Working Group approved this approach in the issue discussion.
The main use case is for folks running in Constrained Language Mode who cannot use [System.IO] calls directly. Right now they have to do a workaround like:
Which is awkward. This cmdlet gives them a clean way to create temp directories.
The implementation uses Path.GetRandomFileName() combined with Path.GetTempPath() to generate a unique directory name, then creates it with Directory.CreateDirectory(). I included tests that mirror the existing New-TemporaryFile tests.
Fixes #25754