Azure PowerShell blob download - to confirm No always

Question

I have a script which downloads blobs from Azure Storage with PowerShell:

ForEach ($blob in $topBlobs) {
    Write-Output "Downloading $blob.Name..."

    Get-AzureStorageBlobContent -Blob $blob.Name `
      -Container $ContainerName `
      -Destination $officeFolder `
      -Context $ctx -ErrorAction SilentlyContinue -Confirm:$false

    Write-Output "Done."
}

How can I force it to answer NO no matter what? If I run it as is now from command line (.cmd file on Windows) it asks for a confirmation!

Answer 1

The -Confirm switch is set to false by default so you omit it. You may see the confirmation dialog due to an existing file. You can bypass it by adding the -force switch.

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Okay, So since you don't want to overwrite the files you could do something like this:

$existingFiles = Get-childitem $officeFolder | Select-Object -ExpandProperty Name
ForEach ($blob in ($topBlobs | Where-Object Name -NotIn $existingFiles)) {

    Write-Output "Downloading $blob.Name..."

    Get-AzureStorageBlobContent -Blob $blob.Name `
      -Container $ContainerName `
      -Destination $officeFolder `
      -Context $ctx 

    Write-Output "Done."
}