[Haskell-cafe] Improvements to package hosting and security

amindfv at gmail.com amindfv at gmail.com
Sat May 2 04:07:22 UTC 2015

I think the idea is that pckage signing is not a requirement, but that git is a requirement for package signing. So users can still get the behavior that they get today, without git.


El Apr 30, 2015, a las 5:43, Tillmann Rendel <rendel at informatik.uni-tuebingen.de> escribió:

> Hi,
> Mathieu Boespflug wrote:
>> This is a valid concern. One that I should have addressed explicitly
>> in the proposal. Git is fairly well supported on Windows these days
>> and installs easily. It could conceivably be included as part of
>> MinGHC. There are many alternatives, but I doubt we'll need them:
>> statically linking a C implementation (libgit2 or another), or a
>> simple native implementation of the git protocol (the protocol is
>> quite straightforward and is documented) and basic disk format.
> I did not read your proposal, but if it entails that new Haskell users on Windows need to manually install git before they can use `cabal install something` for the first time, I think that would be bad.
> For programming beginners (think B.Sc. students in a field other than computer science that take an "intro to programming" class), every installation that requires manual configuration is a hassle. Making the cabal executable find the git executable on the path would potentially require manual configuration to set up the search path. I believe that both ghc and git binary packages for Windows package MSYS (or maybe something similar, not sure), so there is also some potential for a cabal+ghc+git installation to confuse which bundled copy of MSYS to use.
> Some of these "intro to programming" classes consist mostly of object-oriented programming, with a bit of FP thrown in. If helping the students to set up a Haskell environment on their laptops takes one lab session or one week of office hours, that's a significant cut from the FP learning time. If students fail their homework because they fail to install the Haskell environment, that takes a significant cut of their FP learning motivation. If instructors only teach plain Haskell without ever using cabal, this gives the impression that Haskell only works for classroom problems, because there seem to be no libraries.
> I'm aware that programming beginners are not the main target for a programming language infrastructure, but we shouldn't forget about their first-use experience completely, either.
> I'm not even sure whether "statically linking a C implementation" is any better. How would it support `cabal install cabal-install` on Windows, in practice?
>  Tillmann
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