Added list-branches.ps1

Scripts/list-branches.ps1

@@ -0,0 +1,27 @@
+#!/bin/powershell
+<#
+.SYNTAX         ./list-branches.ps1 [<repo-dir>]
+.DESCRIPTION	lists the branches of the current/given Git repository 
+.LINK		https://github.com/fleschutz/PowerShell
+.NOTES		Author:	Markus Fleschutz / License: CC0
+#>
+
+param($RepoDir = "$PWD")
+
+try {
+	$null = $(git --version)
+} catch {
+	write-error "ERROR: can't execute 'git' - make sure Git is installed and available"
+	exit 1
+}
+
+try {
+	set-location $RepoDir
+	& git branch --list --no-color --no-column
+	if ($lastExitCode -ne "0") { throw "'git branch' failed" }
+
+	exit 0
+} catch {
+	write-error "ERROR: line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
+	exit 1
+}