build: i18n: Don't auto-download ICU unless --download=all #21
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Instead of downloading ICU if missing from
deps/icu
, just print a warningunless either
--download=all
or--download=icu
is set.Add some generic scaffolding in case other modules end up in the same boat
in the future.
It's harmless to pass
--download=xyzzy
, so, future proof(at least until some xyzzy dependency is integrated).
//cc: @tjfontaine @misterdjules @trevnorris - as per today's node.js sync call