powershell/PSAvoidDefaultValueForMandatoryParameter

powershell/PSAvoidDefaultValueForMandatoryParameter is a PSScriptAnalyzer diagnostic emitted by tally for PowerShell snippets embedded in Dockerfiles.

Property	Value
Severity	Warning
Category	PSScriptAnalyzer
Default	Disabled in tally
Auto-fix	No

tally disables this rule by default for Dockerfile RUN snippets because a RUN executes statements inline rather than defining cmdlets, parameters, or modules with external callers. Re-enable it with include = ["powershell/PSAvoidDefaultValueForMandatoryParameter"] or by setting rules.powershell.PSAvoidDefaultValueForMandatoryParameter.severity = "warning" in .tally.toml.

Description

Mandatory parameters should not have a default value because there is no scenario where the default can be used. PowerShell prompts for a value if the parameter value is not specified when calling the function.

Examples

Problematic code

function Test
{

    [CmdletBinding()]
    Param
    (
        [Parameter(Mandatory=$true)]
        $Parameter1 = 'default Value'
    )
}

Correct code

function Test
{
    [CmdletBinding()]
    Param
    (
        [Parameter(Mandatory=$true)]
        $Parameter1
    )
}

Source

This rule documentation is adapted from Microsoft’s PSScriptAnalyzer documentation for AvoidDefaultValueForMandatoryParameter, licensed under CC BY 4.0.

powershell/PSAvoidAssignmentToAutomaticVariable

powershell/PSAvoidDefaultValueSwitchParameter

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​Description

​Examples

​Problematic code

​Correct code

​Source

Description

Examples

Problematic code

Correct code

Source