Move the stack args to just before they are needed #39
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This increases layer cacheability so that new stack versions will not invalidate the ghc / cabal install layer. As noted by @yosifkit docker-library/official-images#10140 (comment)
You could maximise layer caching further by moving the ghc / stack required packages ie.
g++
to the initialapt-get install
, which would mean new cabal versions would not invalidate these packages from being installed (or from the user's perspective, the invalidated layers they need to redownload are smaller). My inclination would be to do this change as well, or perhaps the current logical grouping has value? Any thoughts @psftw ?EDIT: Hmm investigating the failure.. ok seems to have been a flaky gpg issue, or a caching issue. Rerunning fixed it.