private/Test-VersionPattern.ps1
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function Test-VersionPattern { <# .SYNOPSIS This function parses some of Lenovos conventions for expressing version requirements and does the comparison. Returns 0, -1 or -2. #> [CmdletBinding()] [OutputType('System.Int32')] Param ( [ValidateNotNullOrEmpty()] [string]$LenovoString, [ValidateNotNullOrEmpty()] [string]$SystemString ) [bool]$LenovoStringIsParsable = $LenovoString -match "^[\d\.]+$" [bool]$SystemStringIsParsable = $SystemString -match "^[\d\.]+$" if (-not $SystemStringIsParsable) { Write-Verbose "Got unsupported version format from OS: '$SystemString'" return -2 } if ($LenovoStringIsParsable) { # Easiest case, both inputs are just version numbers if ((Compare-Version -ReferenceVersion $SystemString.Split('.') -DifferenceVersion $LenovoString.Split('.')) -eq 0) { return 0 # SUCCESS, Versions match } else { return -1 } } else { # Lenovo string contains additional directive (^-symbol likely) # It also sometimes contains spaces, like in package r07iw22w_8260 $LenovoStringSanitized = $LenovoString.Replace(' ', '') if ($LenovoStringSanitized -notmatch '^[\d\.]*\^?[\d\.]*$') { # Unknown character in version string, cannot continue Write-Verbose "Got unsupported version format from Lenovo: '$LenovoString'" return -2 } $GreaterOrEqual, $LessOrEqual = $LenovoStringSanitized.Split('^') if ($LessOrEqual) { # System version must be less or equal if ((Compare-Version -ReferenceVersion $SystemString.Split('.') -DifferenceVersion $LessOrEqual.Split('.')) -notin 0,2) { return -1 } } if ($GreaterOrEqual) { # System version must be equal or higher than if ((Compare-Version -ReferenceVersion $SystemString.Split('.') -DifferenceVersion $GreaterOrEqual.Split('.')) -notin 0,1) { return -1 } } return 0 } } |