74 lines
1.8 KiB
PowerShell
74 lines
1.8 KiB
PowerShell
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function Test-FileEncoding {
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<#
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.SYNOPSIS
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Returns true if the given file is written in a valid encoding
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.DESCRIPTION
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Test the given file against the encoding regex and returns true or false
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.PARAMETER Path
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Relative or full path to an existing file.
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.PARAMETER Encoding
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Optional custom encoding regex string. Default is (utf8|ascii|xml).
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.INPUTS
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[none]
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.OUTPUTS
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[bool]
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.EXAMPLE
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Test-FileEncoding -Path './testfile.txt'
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.NOTES
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#>
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[CmdletBinding()]
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[Diagnostics.CodeAnalysis.SuppressMessageAttribute(
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'PSAvoidUsingInvokeExpression',
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'',
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Justification = 'static input without user manipulation'
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)]
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[OutputType([bool])]
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param (
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[Parameter(Mandatory = $true)]
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[ValidateScript(
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{
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Test-Path -Path $_
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}
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)]
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[string]$Path,
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[Parameter(Mandatory = $false)]
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[string]$Encoding = '(utf8|utf-8|ascii|xml)'
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)
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begin {
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}
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process {
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try {
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Get-Command -Name 'file' -ErrorAction 'Stop' | Out-Null
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}
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catch {
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Write-Error -Message "Could not find command called 'file'!" -ErrorAction 'Stop'
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}
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$Res = Invoke-Expression -Command ("file '{0}' " -f $Path)
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# Remove the file from matching. Use the latest array element if split doesn't work.
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$ParsedResult = ($Res -split ':')[-1]
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Write-Debug -Message ('Encoding: Raw file output {0}' -f $Res)
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Write-Debug -Message ('Parsed match string: {0}' -f $ParsedResult)
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if ($ParsedResult -match $Encoding) {
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Write-Output $true
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}
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else {
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Write-Output $false
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}
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}
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end {
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}
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}
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