Added clean-branch.ps1

Scripts/clean-branch.ps1

@@ -0,0 +1,30 @@
+#!/bin/powershell
+<#
+.SYNTAX         ./clean-branch.ps1
+.DESCRIPTION	cleans the current Git branch (and submodules) from generated files
+.LINK		https://github.com/fleschutz/PowerShell
+.NOTES		Author:	Markus Fleschutz / License: CC0
+#>
+
+try {
+	& git --version
+} catch {
+	write-error "ERROR: can't execute 'git' - make sure Git is installed and available"
+	exit 1
+}
+
+try {
+	& git clean --force -d -x
+	if ($lastExitCode -ne "0") { throw "'git clean' failed" }
+
+	& git submodule foreach --recursive git clean --force -d -x
+	if ($lastExitCode -ne "0") { throw "'git clean' in submodules failed" }
+
+	& git status
+	if ($lastExitCode -ne "0") { throw "'git status' failed" }
+
+	exit 0
+} catch {
+	write-error "ERROR in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}