Re: Making cabal-install SSL capable

On Tue, Apr 28, 2015 at 4:48 PM Thomas Tuegel wrote:

On Tue, Apr 28, 2015 at 8:40 AM, Gershom B wrote:

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More troublesome, I recall that the current scheme for cabal is that it is fully bootstrappable by only depending on GHC base libs and “vendored” dependencies?

Well, not really. We have an ugly bootstrapping script that downloads the other dependencies: https://github.com/haskell/cabal/blob/master/cabal-install/bootstrap.sh

Speaking of which...

On Tue, Apr 28, 2015 at 7:38 AM, Michael Snoyman wrote:

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On Tue, Apr 28, 2015 at 2:56 PM Thomas Tuegel wrote:

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Considering users with cabal-install already, that many dependencies is only a small maintenance problem. Bootstrapping will not be a small problem.

Can you explain what the bootstrapping issue is here? If it's what I

think

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you're getting at, I think I have a simple solution to that:

https://www.stackage.org/lts/build-plan?package=http-client&_accept=application/x-sh

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Note that this script generation isn't really highly tested, I put it together a few weeks back as a proof-of-concept to help out someone

playing

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around with LTS Haskell + Nix.

Sorry, yes, the bootstrapping issue I referred to was installing cabal-install starting from just a bare GHC installation, as you correctly inferred. I think that script you generated is nicer than what we do now; that would be good to have, regardless of where we come down on the TLS situation. Is the source code that generates that script available?

Thank you :) Yes, the code is part of the stackage-server code base, available here: https://github.com/fpco/stackage-server/blob/master/Handler/BuildPlan.hs#L40 When I was working on this for Nix, I offered to make the code a standalone library/tool instead. That offer's still open if it would be useful to others. Michael