Get-TFVersionFromFile.ps1
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<#
.SYNOPSIS Get Terraform version from ".terraform-version" file. This function is mainly for internal use. #> function Get-TFVersionFromFile { [CmdletBinding(DefaultParameterSetName = 'Default')] param ( [Parameter(ParameterSetName = 'Default', Mandatory = $false)] [string]$LiteralPath = './.terraform-version' ) if ([string]::IsNullOrEmpty($LiteralPath)) { $LiteralPath = './.terraform-version' } # Test path if (-not (Test-Path -LiteralPath $LiteralPath)) { Write-Warning ('{0} not found.' -f $LiteralPath) return } # TODO : implement more formal parser $rowString = @(Get-Content -LiteralPath $LiteralPath)[0].Trim() if ('latest-allowed' -eq $rowString) { # TODO Write-Warning 'latest-allowed is not supported.' return } if ('min-required' -eq $rowString) { # TODO Write-Warning 'min-required is not supported.' return } if ('latest' -eq $rowString) { Write-Verbose 'Detect the latest version' return (Find-TFRelease -Latest).Version } if ($rowString -match '^latest:(?<match_exp>.+)$' ) { $matchExp = $Matches.match_exp Write-Verbose ("version match expression : {0}" -f $matchExp) # exclude prerelease $matchVersion = Find-TFVersion -Filter { "$_" -match $matchExp -and (-not $_.PreReleaseLabel) } -Take 1 if (-not $matchVersion) { Write-Warning ('Failed to detect Terraform version. (expression = {0})' -f $matchExp) return } Write-Verbose ('Detect version {0}' -f $matchVersion) return $matchVersion } try { $version = [semver]$rowString Write-Verbose ('Detect version {0}' -f $version) return $version } catch { # do nothing } Write-Warning ('Failed to parse .terraform-version : {0}' -f $rowString) } |