Doesn't work behind proxy

[alaendle]

Mainly because of using affjax for the requests (purescript-contrib/purescript-affjax#131):

spago/src/Spago/Command/Fetch.purs

Lines 225 to 230 in f0f7901

	let packageUrl = "https://packages.registry.purescript.org/" <> PackageName.print name <> "/" <> versionString <> ".tar.gz"
	logInfo $ "Fetching package " <> packageVersion
	response <- liftAff $ withBackoff' do
	res <- Http.request
	( Http.defaultRequest
	{ method = Left Method.GET

Resulting in pretty generic error message like:

[f-f]

How would proxy support work? Like, should Spago be picking up the usual environment variables?
In that case I guess we should use http-proxy to pick up these vars? (and switch from affjax to fetch I guess?

[alaendle]

@f-f Sounds good to me. I really had hoped that some library supports this out-of-the box - without any ceremonies. The interesting observation is that spago already comes so far since the package set is fetched via git - which respects the proxy environment variables 😄 Unfortunately, I will not be able to contribute via PR - as I only noticed this in passing, but I still wanted to record this issue as a reference - since it is not immediately obvious by just looking at the error message.