On Wed, Mar 23, 2016 at 06:13:24PM +0800, Hui Yiqun wrote: > Otherwise, on environments where these variables and set, an assignment > to one of these variables will cause the variable being implicitly exported. Yes, that's one problem, though I think the more general problem is simply that they pollute the test environment (so git might actually be touching your _real_ credential-cache socket, and not a fake test one). I'd probably write: We try to clean the test environment of variables that may affect the outcome, so that the tests always start from a known state. We already clean XDG_CONFIG_HOME, but now that we support XDG_RUNTIME_DIR, we must clean that, too. While we're at it, let's simply cover all variables mentioned in the xdg spec[1] to future-proof and to cover any places where they might unexpectedly have an impact. Feel free to use or adapt that as you see fit. > +# Unset all environment variables defined in xdg base dir spec[1] > +# to make sure that the test are running with a known state. > +# > +# [1] https://specifications.freedesktop.org/basedir-spec > +# /basedir-spec-latest.html > +unset XDG_DATA_HOME > unset XDG_CONFIG_HOME > +unset XDG_DATA_DIRS > +unset XDG_CONFIG_DIRS > +unset XDG_CACHE_HOME > +unset XDG_RUNTIME_DIR Thanks for being thorough here. This is much nicer than just adding XDG_RUNTIME_DIR. -Peff -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html