tags = []
def sout = new StringBuilder(), serr = new StringBuilder()
def p = ['cmd', '/c', 'C:\\Program Files\\Git\\cmd\\git archive --remote git@git.srv.ttms.net:arg.git HEAD . | C:\\Program Files (x86)\\GnuWin32\\bin\\tar -t'].execute()
//p.waitFor()
//println(p.in.text)
//p.text.eachLine { tags.push(it) }
//println(tags)
p.consumeProcessOutput(sout, serr)
p.waitForOrKill(1000)
println "out> $sout err> $serr"




Result
out>  err> 'C:\Program' is not recognized as an internal or external command,
operable program or batch file.