Private/Initialize-RegionInfo.ps1
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function Initialize-RegionInfo { <# .SYNOPSIS Lazy initialize module-wide variables that depend on AWS regions #> if (-not $Script:RegionInfo) { $Script:RegionInfo = @{} # Get-EC2Region asks an AWS service for current regions so is always up to date. # OTOH Get-AWSRegion is client-side and depends on the version of AWSPowerShell installed. Get-EC2Region | ForEach-Object { $Script:RegionInfo.Add($_.RegionName, $null) } } if (-not $Script:TemplateParameterValidators) { # Hashtable of AWS custom parameter types vs. regexes to validate them # Supporting 8 and 17 character identifiers $Script:TemplateParameterValidators = @{ 'AWS::EC2::Image::Id' = '^ami-([a-f0-9]{8}|[a-f0-9]{17})$' 'AWS::EC2::Instance::Id' = '^i-([a-f0-9]{8}|[a-f0-9]{17})$' 'AWS::EC2::SecurityGroup::Id' = '^sg-([a-f0-9]{8}|[a-f0-9]{17})$' 'AWS::EC2::Subnet::Id' = '^subnet-([a-f0-9]{8}|[a-f0-9]{17})$' 'AWS::EC2::Volume::Id' = '^vol-([a-f0-9]{8}|[a-f0-9]{17})$' 'AWS::EC2::VPC::Id' = '^vpc-([a-f0-9]{8}|[a-f0-9]{17})$' 'AWS::EC2::AvailabilityZone::Name' = "^$(($Script:RegionInfo.Keys | ForEach-Object {"($_)"}) -join '|' )[a-z]`$" } } } |