Modify Windows variables in Groovy

winvars.groovy

/*
// EXAMPLE:
GroovyShell shell = new GroovyShell()
def v = shell.parse(new File(/H:\scripts\winvars.groovy/))

println v.addPATH([
    /H:\Software\gradle-2.10\bin/,
    /H:\Software\groovy-2.4.5\bin/,
    /H:\Software\kotlinc\bin/,
    /H:\Software\emsdk-1.35.0-portable-64bit/,
    /H:\Software\LLVM\bin/,
    /C:\Users\kst-kg\AppData\Local\Android\Sdk\platform-tools/,
    /C:\Users\kst-kg\AppData\Local\Android\Sdk\ndk/,
])

// Used for VSCode:
println v.setVAR('http_proxy', 'http://134.130.4.241:3128/')
println v.setVAR('https_proxy', 'https://134.130.4.241:3128/')

println "DONE"
*/

String getVAR(String var) {
    //def lines = "cmd /c set $var".execute().text.split("\n")
	return ($/powershell -NoLogo -Noninteractive -InputFormat none -Command [environment]::GetEnvironmentVariable('$var','User');/$).execute().text.replace("\n", "").replace("\r", "")
}

String setVAR(String var, String path) {
    command = ($/powershell -NoLogo -Noninteractive -InputFormat none -Command "[Environment]::SetEnvironmentVariable('$var', '$path','User')";/$)
    println command
    command.execute().text
}

String addPATH(v) {
	def vars = getVAR('PATH').split(";").toList()
    println vars
	vars.addAll(v)
	//def vars = v
	vars = vars.unique { a, b -> a <=> b }
	vars = vars.each { it.trim() }
	vars = vars.toSorted().findAll {it.length() > 0}

	println vars.join("\n")

	setVAR('PATH', vars.join(";"))
}