Invoke-Pandoc

Invoke-Pandoc.ps1

[CmdletBinding()]
param (
    [Parameter(Mandatory = $true)]
    [string]
    $Path,
    [Parameter(Mandatory = $true)]
    [string]
    $Output,
    [Parameter()]
    $PandocArgs,
    [switch]
    $Force
)

if (!(Test-Path $Path)) {
    Write-Error -Message "Cannot find path '$($Path)' because it does not exist."
    exit 1
}

# normalizing output path
$isRooted = [System.IO.Path]::IsPathRooted($Output)
if (!$isRooted) {
    $Output = Join-Path (Resolve-Path .) $Output
}

if ((!$Force.IsPresent) -and (Test-Path($Output))) {
    Write-Error "The file '$($Output)' already exists."
    exit 1
}

function Enter-NewTempFolder {
    $tempFolder = (New-Guid).Guid
    Push-Location $env:temp
    New-Item -Path $tempFolder -ItemType Directory | Out-Null
    $fullTempPath = (Resolve-Path $tempFolder).Path
    Write-Verbose "Entering: $($fullTempPath)"
    Push-Location $fullTempPath
    return $fullTempPath
    
}

function Exit-NewTempFolder {
    param (
        [Parameter()]
        [string]
        $Path
    )

    if (Test-Path $Path) {
        Pop-Location # temporary folder inside of $env:temp
        Write-Verbose "Deleting: $($Path)"
        Remove-Item -Path $Path -Recurse 
        Pop-Location # $env:temp
    }
}

$tempFolder = Enter-NewTempFolder
try {
    Write-Verbose "Copying: source to working directory"
    Copy-Item -Path $Path -Destination $tempFolder
    $fileName = Split-Path -Path $Path -Leaf
    $outputFileName = Split-Path -Path $Output -Leaf

    Write-Verbose "Running: pandoc on docker"
    if ($PandocArgs.GetType() -eq [string]) {
        Write-Verbose "String Vesion"
        docker run `
            --rm `
            -v "$($tempFolder):/data" `
            pandoc/latex $PandocArgs.Split(' ') -o $outputFileName $fileName
    }
    else {
        Write-Verbose "Defult Vesion"
        docker run `
            --rm `
            -v "$($tempFolder):/data" `
            pandoc/latex @PandocArgs $fileName -o $outputFileName 
    }

    Write-Verbose "Command ran: pandoc $fileName -o $outputFileName $PandocArgs"

    if ($LASTEXITCODE -ne 0) {
        Write-Error -Message "Docker: failed returning $($LASTEXITCODE) as exit code"
        Exit-NewTempFolder -Path $tempFolder
        exit 1
    }

    Write-Verbose "Copying: output to designated destination"
    Copy-Item -Path $outputFileName -Destination $Output
}
finally {
    Exit-NewTempFolder -Path $tempFolder
}