Picks up zip files in a given folder and extracts the contents to a destination folder.

unzip.ps1

<#
  Picks up zip files in a given folder and extracts the contents to a destination folder.
  Peter Tyrrell, Andornot
#>

param(
    [Parameter(Mandatory=$true,Position=0)]
    [string]$in,
    [Parameter(Mandatory=$false,Position=1)]
    [string]$out = ".",
    [Parameter(Mandatory=$false,Position=2)]
    [string]$newZipPath = ""
)

# validate zip file
$zipPath = [System.IO.Path]::Combine($pwd, $in)

if (-not (test-path -path $zipPath)) {
    write-warning "Cannot find path '$zipPath' because it does not exist."
    exit 1
}

if (-not ((get-item $zipPath).Extension -eq ".zip")) {
    write-warning "Input has to be a .zip file."
    exit 1
}

# validate out dir
$outPath = [System.IO.Path]::Combine($pwd, $out)

if (([System.IO.Path]::HasExtension($outPath))) {
    write-warning "Extract location has to be a folder."
    exit 1
}

Add-Type -AssemblyName System.IO.Compression.FileSystem

$tempPath = [System.IO.Path]::GetTempPath()
$extractFolderName = [System.IO.Path]::GetRandomFileName()
$extractPath = [System.IO.Path]::Combine($tempPath, $extractFolderName)

# unzip to temp dir
[System.IO.Compression.ZipFile]::ExtractToDirectory($zipPath, $extractPath)

# move unzipped files to output dir, overwrite pre-existing
if (-not (test-path $outPath)) {
    mkdir $outPath
}
get-childitem -path $extractPath -recurse | move-item -destination $outPath -force

# move/rename input zip file
if ($newZipPath.trim() -ne "") {
   mv -path $zipPath -destination $newZipPath -force
}

exit 0