product=${product:-js} branch=${branch:-1.9.3} buildtype=${buildtype:-debug} jsshellsourcepath=${jsshellsourcepath:-/work/mozilla/builds/1.9.3/mozilla/js/src} TEST_MOZILLA_HG=${TEST_MOZILLA_HG:-http://hg.mozilla.org/mozilla-central} TEST_MOZILLA_HG_REV=${TEST_MOZILLA_HG_REV:-tip}