Add create-branch.ps1

Scripts/create-branch.ps1

@@ -0,0 +1,35 @@
+#!/bin/powershell
+<#
+.SYNTAX       ./create-branch.ps1 [<new-branch-name>] [<repo-dir>]
+.DESCRIPTION  creates a new branch in the current/given Git repository 
+.LINK         https://github.com/fleschutz/PowerShell
+.NOTES        Author: Markus Fleschutz / License: CC0
+#>
+
+param($NewBranchName = "", $RepoDir = "$PWD")
+
+if ($NewBranchName -eq "") {
+	$NewBranchName = read-host "Enter new branch name"
+}
+
+try {
+	if (-not(test-path "$RepoDir" -pathType container)) { throw "Can't access directory: $RepoDir" }
+	set-location "$RepoDir"
+
+	& git --version
+	if ($lastExitCode -ne "0") { throw "Can't execute 'git' - make sure Git is installed and available" }
+
+	& git checkout -b "$NewBranchName"
+	if ($lastExitCode -ne "0") { throw "'git checkout -b $NewBranchName' failed" }
+
+	& git push origin "$NewBranchName"
+	if ($lastExitCode -ne "0") { throw "'git push origin $NewBranchName' failed" }
+
+	& git submodule update --init --recursive
+	if ($lastExitCode -ne "0") { throw "'git submodule update' failed" }
+
+	exit 0
+} catch {
+	write-error "ERROR: line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}