DSCResources/TextFile/TextFile.psm1
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# Import CommonHelper $script:dscResourcesFolderFilePath = Split-Path $PSScriptRoot -Parent $script:commonHelperFilePath = Join-Path -Path $script:dscResourcesFolderFilePath -ChildPath 'CommonHelper.psm1' Import-Module -Name $script:commonHelperFilePath function Get-TargetResource { [CmdletBinding()] [OutputType([System.Collections.Hashtable])] param ( [Parameter(Mandatory = $true)] [string] $Path ) $returnValue = @{ Ensure = 'Absent' Path = $Path Contents = $null } # check file exists if (-not (Test-Path -LiteralPath $Path -PathType Leaf)) { Write-Verbose ('File "{0}" not found.' -f $Path) $returnValue.Ensure = 'Absent' } else { $returnValue.Ensure = 'Present' $Item = Get-Item -LiteralPath $Path if ($Item.Length -gt 2048) { Write-Warning ('The file size is over 2 KB, so reading is canceled.') } else { $returnValue.Contents = (Get-NewContent -LiteralPath $Path -Raw) } } $returnValue } # end of Get-TargetResource function Set-TargetResource { [CmdletBinding()] param ( [Parameter()] [ValidateSet('Present', 'Absent')] [string] $Ensure = 'Present', [Parameter(Mandatory = $true)] [string] $Path, [Parameter()] [AllowEmptyString()] [string] $Contents = '', [Parameter()] [ValidateSet('utf8', 'utf8NoBOM', 'utf8BOM', 'utf32', 'unicode', 'bigendianunicode', 'ascii', 'sjis', 'Default')] [string] $Encoding = 'utf8NoBOM', [Parameter()] [ValidateSet('CRLF', 'LF')] [string] $NewLine = 'CRLF' ) # Ensure = 'Absent' if ($Ensure -eq 'Absent') { if (Test-Path -LiteralPath $Path -PathType Leaf) { Write-Verbose ("Removing File '{0}'" -f $Path) Remove-Item -LiteralPath $Path } } else { # Ensure = 'Present' # Create parent directory if not exist $ParentFolder = Split-Path -Path $Path -Parent -ErrorAction SilentlyContinue if ($ParentFolder -and (-not (Test-Path -Path $ParentFolder -PathType Container))) { $null = New-Item -Path $ParentFolder -ItemType Directory -Force -ErrorAction Stop } # Create empty file when the Contents parameter is not specified if ([string]::IsNullOrEmpty($Contents)) { $null = New-Item -Path $Path -ItemType File -Force } else { #Output text file Write-Verbose ("Creating File '{0}'" -f $Path) $Contents | Set-NewContent -Path $Path -Encoding $Encoding -NewLine $NewLine -NoNewline -Force -ErrorAction Stop } } } # end of Set-TargetResource function Test-TargetResource { [CmdletBinding()] [OutputType([bool])] param ( [Parameter()] [ValidateSet('Present', 'Absent')] [string] $Ensure = 'Present', [Parameter(Mandatory = $true)] [string] $Path, [Parameter()] [AllowEmptyString()] [string] $Contents = '', [Parameter()] [ValidateSet('utf8', 'utf8NoBOM', 'utf8BOM', 'utf32', 'unicode', 'bigendianunicode', 'ascii', 'sjis', 'Default')] [string] $Encoding = 'utf8NoBOM', [Parameter()] [ValidateSet('CRLF', 'LF')] [string] $NewLine = 'CRLF' ) if (-not (Test-Path -LiteralPath $Path -PathType Leaf)) { Write-Verbose ('The File {0} is not exist.' -f $Path) return ($Ensure -eq 'Absent') } elseif ($Ensure -eq 'Absent') { Write-Verbose ('The File {0} is exist. Test FAILED' -f $Path) return $false } else { $CurrentFile = Get-Item -LiteralPath $Path $Encoder = Get-Encoding -Encoding $Encoding -ErrorAction Stop $ContentBytes = $Contents | Convert-NewLine -NewLine $NewLine | ForEach-Object { if (($Encoding -eq 'utf8') -or ($Encoding -eq 'utf8NoBOM')) { $Encoder.GetBytes($_) } else { # Append BOM $Encoder.GetPreamble() + $Encoder.GetBytes($_) } } # Test Length if ($CurrentFile.Length -ne $ContentBytes.Length) { Write-Verbose ('File size is not matched. Test FAILED.') return $false } elseif ($ContentBytes.Length -eq 0) { Write-Verbose ('File size is matched (zero). Test PASSED.') return $true } # Test Hash try { $MemoryStream = [System.IO.MemoryStream]::New($ContentBytes) $ContentsHash = Get-FileHash -InputStream $MemoryStream -Algorithm SHA1 $CurrentFileHash = Get-FileHash -LiteralPath $Path -Algorithm SHA1 $TestResult = $CurrentFileHash.Hash -eq $ContentsHash.Hash if (-not $TestResult) { Write-Verbose ('File hash is not matched. Test FAILED.') return $false } else { Write-Verbose ('File hash is matched. Test PASSED.') return $true } } catch { Write-Error -Exception $_.Exception } finally { if ($null -ne $MemoryStream) { $MemoryStream.Close() } } } return $true } # end of Test-TargetResource |