Set-Item does not perform type conversion, but Set-Variable does.

For example with such properties:

properties {
  [uri]$applicationUrl = $null
}

Without this change passing the URL like this:

psake -properties @{ applicationUrl = "http://app.example.com" }

Will make the $applicationUrl variable to be of type [string] instead of [uri]. This is unexpected, as normally variable defined with type accelerator will automatically convert other types to the specified type, for example

[uri]$myUrl = "http://my.example.com"
$myUrl = "http://other.example.com" # this still is [uri], not a [string]

Set-Variable preserve behavior of variables defined with type accelerators, while Set-Item sadly does not:).

BTW. there is a workaround: you can pass the type info again when passing parameter in psake, but this is error prone, as this is not needed normally in PowerShell, only in psake: psake -properties @{ applicationUrl = [uri]"http://app.example.com" }

Description

Related Issue

Motivation and Context

How Has This Been Tested?

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Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.