powershell : how do you run a folder size summation?

Question

My objective is to write a copy script which moves files from one directory "d:\aa1" to "d:\aa2" up to a specified size of another directory d:\bbb. In other words.. I'd like it to copy all files from d:\aa1 to d:\aa2 until the size of d:\aa1 is the same size or less than d:\bbb

So far I have

$lmt = get-childitem d:\bbb  | measure-object -property length -sum 
do { get-childitem -path d:\aa1 | move-item -destination "d:\aa2" } while {measure-object {$_.sum -lt $lmt}

but the syntax doesn't seem to be working. Any ideas?

thanks in advance

Answer 1

Get-ChildItem -path d:\aa1 `
| % {if (((Get-ChildItem d:\aa2 `
| Measure-Object -Property Length -Sum).Sum + $_.Length) `
-lt (Get-ChildItem d:\bbb | Measure-Object -Property Length -Sum).Sum) `
{Move-Item $_.FullName d:\aa2}}