[Haskell-beginners] LTS is good but...

[emacstheviking]

Agreed Michael!

I am currently wiping all Mac Ports packages and I will perform a clean up
of /Library/Haskell etc.

What is the *preferred* way to get the lastest for OSX: Using homebrew,
macports or the Haskell Platform. I *used* to use the platform installer
but for some reason (cabal I expect!) I started trying out other ways...

I think actually I will go the platform packager again...

On 4 March 2015 at 09:13, Michael Snoyman <michael at snoyman.com> wrote:

> I can't really explain the details of what's going on here. It seems that
> in some cases different versions of the executables are being found, but I
> don't know why. Wiping out your sandbox (cabal sandbox delete) and starting
> over may be sufficient to recover.
>
> On Wed, Mar 4, 2015 at 11:11 AM emacstheviking <objitsu at gmail.com> wrote:
>
>> As requested,
>>
>> iMac:~ vosabristol$ ghc --version
>> The Glorious Glasgow Haskell Compilation System, version 7.8.3
>>
>> which ghc
>> /opt/local/bin/ghc
>>
>> Hmm.... it shows a macports instsallation of GHC... but I am sure that's
>> how I git it... I *used* to use the OSX installation package but I thought
>> a clean start using MacPorts would somehow change the mood...
>>
>> iMac:~ vosabristol$ cabal --version
>> cabal-install version 1.16.0.2
>> using version 1.16.0 of the Cabal library
>>
>> iMac:~ vosabristol$ which cabal
>> /usr/bin/cabal
>>
>> So... there is a possible case for *once again* performing a complete and
>> utter removal of Haskell and its partners in crime and doing a fresh
>> installation?
>>
>>
>> Out of frustration I built OCaml and OPAM from sources last night but I'd
>> still like to go with GHC!
>>
>> :)
>>
>>
>> On 3 March 2015 at 20:43, Michael Snoyman <michael at snoyman.com> wrote:
>>
>>> Funny that there's an issue being discussed in the cabal issue tracker
>>> right now[1] similar to this. But the report you're giving here is
>>> particularly strange. Cabal-1.16 implies that you're using GHC 7.6, which
>>> is supported by the claim that base 4.7 isn't available. I'd recommend
>>> starting off with running the following commands and pasting the output:
>>>
>>> ghc --version
>>> which ghc
>>> cabal --version
>>> which cabal
>>>
>>> [1] https://github.com/haskell/cabal/issues/2438
>>>
>>> On Tue, Mar 3, 2015 at 10:21 PM emacstheviking <objitsu at gmail.com>
>>> wrote:
>>>
>>>> Forgot to add that somehow, despite the upgrade, my cabal version has
>>>> gone backwards from 1.20.0.1 to 1.16.0
>>>>
>>>> WTF?
>>>>
>>>>
>>>> On 3 March 2015 at 20:19, emacstheviking <objitsu at gmail.com> wrote:
>>>>
>>>>> I started an OpenGL project within an LTS sandbox as guided on another
>>>>> post and, somewhat foolishly it would see, I did a "cabal install
>>>>> cabal-install" when prompted that a new version was available.
>>>>>
>>>>> The very next time I tried to work on my code.... I got this:
>>>>>
>>>>> bash-3.2$ pwd
>>>>> /Users/seancharles/Documents/Coding/haskell/lts1
>>>>> bash-3.2$ cabal build
>>>>> cabal: You need to re-run the 'configure' command. The version of
>>>>> Cabal being
>>>>> used has changed (was Cabal-1.20.0.1, now Cabal-1.16.0).
>>>>> bash-3.2$ cabal configure
>>>>> Resolving dependencies...
>>>>> Configuring lts1-0.1.0.0...
>>>>> cabal: At least the following dependencies are missing:
>>>>> base ==4.7.*
>>>>> bash-3.2$ cabal build
>>>>> cabal: You need to re-run the 'configure' command. The version of
>>>>> Cabal being
>>>>> used has changed (was Cabal-1.20.0.1, now Cabal-1.16.0).
>>>>> bash-3.2$ ls -l
>>>>> total 112
>>>>> -rw-r--r--  1 seancharles  staff     19 Mar  2 12:53 LICENCSE
>>>>> -rw-r--r--  1 seancharles  staff    552 Mar  3 20:09 Main.hs
>>>>> -rw-r--r--  1 seancharles  staff    477 Mar  3 20:07 Main.hs~
>>>>> -rw-r--r--  1 seancharles  staff     46 Mar  2 12:52 Setup.hs
>>>>> -rw-r--r--  1 seancharles  staff  30198 Mar  2 12:51 cabal.config
>>>>> -rw-r--r--  1 seancharles  staff   1090 Mar  2 12:51
>>>>> cabal.sandbox.config
>>>>> drwxr-xr-x  5 seancharles  staff    170 Mar  2 12:53 dist
>>>>> -rw-r--r--  1 seancharles  staff   1932 Mar  2 12:52 lts1.cabal
>>>>> bash-3.2$
>>>>>
>>>>> So, welcome to a different kind of hell, "cabal version hell" perhaps?
>>>>>
>>>>> Can anybody help me get it running again?
>>>>> Thanks.
>>>>> Sean.
>>>>>
>>>>>
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