Make touch work with directories; Format scripts

tools/install_python.ps1

@@ -5,6 +5,7 @@ if ($LastExitCode -eq 1603) {
   $ErrorActionPreference = 'Stop'
   msiexec.exe /x python.msi /qn "TARGETDIR=${PWD}\python" ALLUSERS=0
   msiexec.exe /i python.msi /qn "TARGETDIR=${PWD}\python" ALLUSERS=0
-} else {
+}
+else {
   $Host.SetShouldExit($LastExitCode)
 }

tools/touch.ps1

@@ -1,3 +1,9 @@
 param($item)
 $ErrorActionPreference = 'Stop'
-(Get-ChildItem $item).LastWriteTime = Get-Date
+if (Test-Path -Type Container $item) {
+  $info = New-Object System.IO.DirectoryInfo($item)
+}
+else {
+  $info = New-Object System.IO.FileInfo($item)
+}
+$info.LastWriteTime = Get-Date

tools/unpart.ps1

@@ -4,9 +4,9 @@ $out = [System.Io.File]::OpenWrite($file)
 $part = 1
 $in = "${file}.${part}.part"
 while (Test-Path $in) {
-    $buf = [System.IO.File]::ReadAllBytes($in)
-    $out.Write($buf, 0, $buf.Count)
-    $part += 1
-    $in = "${file}.${part}.part"
+  $buf = [System.IO.File]::ReadAllBytes($in)
+  $out.Write($buf, 0, $buf.Count)
+  $part += 1
+  $in = "${file}.${part}.part"
 }
 $out.close()