How to create a folder and name it by using a computer name variable in Powershell?

Question

I'm new to Powershell. I would like the code to output results to a new folder and name it with a computer name variable. If the folder already exists, it should just output the result into that folder.

What is the best way to do it?

So far I have the following output code:

$dir = "C:\"

$count = @{}
$size = @{}
$hostname = @{}
gci $dir -recurse |%{
[int]$count[$_.extension] += 1
[int64]$size[$_.extension] += $_.length
}
$results = @()
$count.keys | sort |% {
$result = ""|select extension,count,size,hostname
$result.extension = $_
$result.count = $count[$_]
$result.size = [math]::round($size[$_] /1Gb, 3)
$result.hostname = $(get-content env:computername)
$results += $result
}
$results | ft -auto

$dirName = "C:\inetpub\wwwroot\${Env:ComputerName}"
if (!(Test-Path $dirName)) { mkdir $dirName }


$a = "<style>"
$a = $a + "BODY{background-color:#A987CC;}"
$a = $a + "TABLE{border-width: 1px;border-style: solid;border-color: black;border-collapse: collapse;.center { margin:auto; width:70%; };}"
$a = $a + "TH{border-width: 1px;padding: 0px;border-style: solid;border-color: black;background-color:#99CCFF}"
$a = $a + "TD{border-width: 1px;padding: 0px;border-style: solid;border-color: black;background-color:PaleGoldenrod}"
$a = $a + "</style>"


$results | sort-object -property size -Descending | select-object -first 30 | ConvertTo-Html extension,count,size, hostname "$a" -title "JUST TESTING :)" -body "I WAS HERE! :)" | 
Set-Content C:\inetpub\wwwroot\${Env:ComputerName}\"$env:computername-$(get-date -f dd-MM-yyyy-hh-mm)".htm

If that code is doing what you need it to do, go with it. Do you have a specific concern with it? — alroc
– alroc, Commented Jul 5, 2013 at 13:54
thanks for your reply. Yes, I just needed the code that Joey suggested, so that new folder is generated and named with the hostname and then output was generated in that folder. I've updated my question code so that you can see the whole code. — Gazel
– Gazel, Commented Jul 5, 2013 at 15:33

Joey · Accepted Answer · 2013-07-05 13:51:39Z

1

$dirName = "C:\inetpub\wwwroot\${Env:ComputerName}"
if (!(Test-Path $dirName)) { mkdir $dirName }

maybe?

answered Jul 5, 2013 at 13:51

Joey

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1 Comment

Gazel Over a year ago

Thanks! I've incorporated your code id it works great! I also used $dirName in the output string so that .htm file is generated in the folder.

Aaron Jensen · Accepted Answer · 2013-07-09 09:06:12Z

It looks like you've created a script that reports on the disk space taken up by files of a specific extension. Instead of calculating that information yourself, I recommend the Group-Object cmdlet to group all the files by their extension, and the Measure-Object cmdlet to sum their sizes. I would also use a here string for your <style> block in place of string concatenation.

$dir = "C:\"

# Get all the files, ignoring errors because we won't have access to some directories
Get-ChildItem $dir -Recurse -ErrorAction SilentlyContinue |
    # We don't want any directories
    Where-Object { -not $_.PsIsContainer } |
    # Group by extension
    Group-Object Extension |
    ForEach-Object {
        # Sum the lenghts of all files in this group/extension
        $totalSize = $_.Group | 
                         Measure-Object -Sum Length | 
                         Select-Object -Expand Sum
        # Add dynamic properties Size and SizeInDB properties for our report
        $_ | 
            Add-Member NoteProperty -Name Size -Value $totalSize -PassThru |
            Add-Member ScriptProperty -Name SizeInGB -Value { [math]::round($this.Size/1GB,3) } -PassThru |
            Add-Member NoteProperty -Name HostName -Value ($env:ComputerName) -PassThru
    } |
    # Sort by size, biggest at the top
    Sort-Object Size -Descending |
    # Save the results in the $results variable
    Tee-Object -Variable results
    # Show a report in the script output
    Format-Table Name,Count,SizeInGB -AutoSize

$dirName = "C:\inetpub\wwwroot\${Env:ComputerName}"
if (!(Test-Path $dirName))
{ 
    mkdir $dirName 
}

$style = @'
<style>
    BODY{background-color:#A987CC;}
    TABLE{border-width: 1px;border-style: solid;border-color: black;border-collapse: collapse;.center { margin:auto; width:70%; };}
    TH{border-width: 1px;padding: 0px;border-style: solid;border-color: black;background-color:#99CCFF}
    TD{border-width: 1px;padding: 0px;border-style: solid;border-color: black;background-color:PaleGoldenrod}
</style>"
'@

$results |
    # Grab the 30 extensions taking up the most space and create an HTML report
    Select-Object -First 30 |
    ConvertTo-Html Name,Count,SizeInGB,HostName "$a" -title "JUST TESTING :)" -body "I WAS HERE! :)" | 
    Set-Content (Join-Path $dirName du.html)

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