Compare the files of two directories using content hashes

hash-diff.ps1

$referencePath = "a"
$differencePath = "b"

$lhs = Get-ChildItem -Recurse -File -Path $referencePath
$lhs_hashes = $lhs | Select-Object Name, FullName, Length, @{Name="Hash"; Expression={ Get-FileHash $_.FullName }}

$rhs = Get-ChildItem -Recurse -File -Path $differencePath
$rhs_hashes = $rhs | Select-Object Name, FullName, Length, @{Name="Hash"; Expression={ Get-FileHash $_.FullName }}

$diff = Compare-Object $lhs_hashes $rhs_hashes -property @("Name", "Hash")