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Today's Topics:
1. Re: LTS is good but... (Boris)
2. command-line interaction with running process (Elise Huard)
3. Re: command-line interaction with running process
(Sumit Sahrawat, Maths & Computing, IIT (BHU))
----------------------------------------------------------------------
Message: 1
Date: Wed, 04 Mar 2015 11:31:54 +0200
From: Boris <[email protected]>
To: Michael Snoyman <[email protected]>, The Haskell-Beginners
Mailing List - Discussion of primarily beginner-level topics related
to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] LTS is good but...
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"
Hey,
Little addition to what Michael already sent you.
To get ?the latest? you should build from sources :D
But in case it?s ok for you to have ghc 7.8.3 and you don?t want to
./configure; make; make install, you might also check this installation script
on github.
On March 4, 2015 at 11:28:50, Michael Snoyman ([email protected]) wrote:
I'd recommend looking at:
http://www.stackage.org/install#mac-os-x
https://github.com/bitemyapp/learnhaskell/blob/master/README.md#mac-os-x
I don't generally recommend using the platform installer, it ends up pegging
libraries to old versions which causes dependency problems, or in some cases
have known bugs.
On Wed, Mar 4, 2015 at 11:26 AM emacstheviking <[email protected]> wrote:
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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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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Message: 2
Date: Wed, 4 Mar 2015 10:32:53 +0100
From: Elise Huard <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: [Haskell-beginners] command-line interaction with running
process
Message-ID:
<cahfycqnakuif5wtipafgovryoj6hw57ewr7l6gwlrjs6k8t...@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Hi,
I'm trying to do the following: implementing a command-line interface
to directly interact with the state or the parameters of a
looping/running process (a game, to be specific).
My first thought is to fork a thread, passing in a TChan/TVar or
similar to enable communication, and to have the command-line
interface on the thread (getLine or haskelline ...).
Another option would be to have a bona fide server-client interface
(with sockets or others), to fork a thread again to run the server and
to connect using the client library - which would allow me to use ghci
and have transparent serialization under the hood.
Are there known use cases? Am I missing something, for instance is it
possible to interact with a running process directly using ghci?
Any tips?
Thank you,
Elise
------------------------------
Message: 3
Date: Wed, 4 Mar 2015 15:15:09 +0530
From: "Sumit Sahrawat, Maths & Computing, IIT (BHU)"
<[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] command-line interaction with running
process
Message-ID:
<CAJbEW8Pde=bxrh9kr0jpbsjymmvjw0i9t_khoc_-0-qk5-6...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
If you decice upon the server-client architecture, you should take a look
at zeromq.
It is used extensively in IHaskell, so you can peek at the code there for a
working example.
Also, I believe a client-server architecture will be better as I personally
enjoy games a lot more when they are multi-player.
It makes the conversion from single-player to multi-player a
non-destructive (or atleast less destructive) process.
On 4 March 2015 at 15:02, Elise Huard <[email protected]> wrote:
> Hi,
>
> I'm trying to do the following: implementing a command-line interface
> to directly interact with the state or the parameters of a
> looping/running process (a game, to be specific).
>
> My first thought is to fork a thread, passing in a TChan/TVar or
> similar to enable communication, and to have the command-line
> interface on the thread (getLine or haskelline ...).
> Another option would be to have a bona fide server-client interface
> (with sockets or others), to fork a thread again to run the server and
> to connect using the client library - which would allow me to use ghci
> and have transparent serialization under the hood.
>
> Are there known use cases? Am I missing something, for instance is it
> possible to interact with a running process directly using ghci?
> Any tips?
>
> Thank you,
>
> Elise
> _______________________________________________
> Beginners mailing list
> [email protected]
> http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners
>
--
Regards
Sumit Sahrawat
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