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powershell/PSAvoidUsingDoubleQuotesForConstantString is a PSScriptAnalyzer diagnostic emitted by tally for PowerShell snippets embedded in Dockerfiles.
PropertyValue
SeverityInformation
CategoryPSScriptAnalyzer
Auto-fixNo

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Description

Single quotes should be used when the value of a string is constant. A constant string doesn’t contain variables or expressions intended to insert values into the string, such as "$PID-$(hostname)"). This makes the intent clearer that the string is a constant and makes it easier to use some special characters such as $ within that string expression without needing to escape them. There are exceptions to that when double quoted strings are more readable. For example, when the string value itself must contain a single quote or other special characters, such as newline ("`n"), are already being escaped. The rule does not warn in these cases.

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Examples

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Problematic code

$constantValue = "I Love PowerShell"

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Correct code

$constantValue = 'I Love PowerShell'

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Source

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