Re: A future for the Windows packaging situation.

2020-05-13 Thread Hécate

>Hopefully that wouldn't become the only way to download GHC.

That wasn't my intention to suggest it to be the One True Way to 
download it.


>Sounds great, but is it reasonable? GNU/Linux package managers AFAIK 
don't install Haskell libraries either


Some do! On Fedora, the Haskell libraries that are shipped are prefixed 
with `ghc-`, and Arch Linux has become
quite infamous due to the way they ship dynamically-linked Haskell 
libraries and executables.
By GUI I was thinking of something like DNFDragora[0] and its Ubuntu 
counterpart (whose name I forgot).


>It's true that one-liners and scripting is harder in Cmd, but simple 
commands (no pipes, no flow control etc.) that are the bread and
butter for developers work just fine.  I sense I'm missing some context; 
why is this an issue?


cmd.exe is fundamentally a foreign interface to most Windows users, even 
for developers. IDEs and GUIs have reigned for a long long
time in Windows Land, and Microsoft has no will to change this state of 
fact. WSL is a tool developed to Linux / macOS power-users
who incidentally need to deal with Windows, or needed an argument to 
switch to the platform.


In addition to all of this, shipping a .tar.lz format was a terrible 
mistake, for no tool shipped with Windows is able to properly
handle it, but I do not wish to blame anyone, it just needs to be 
changed to .zip and we can be done with it.


[0]: https://github.com/manatools/dnfdragora

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Re: A future for the Windows packaging situation.

2020-05-13 Thread David Macek
On Wed, May 13, 2020 at 12:56 PM Hécate  wrote:
> As some of you may have seen from the long threads in haskell-cafe@,
> countless steps of various difficulty for Windows users
> (excluding power-users) need to be taken in order to have a proper
> working GHC / Haskell installation on their machine.

Could you (or someone) summarize these issues and steps?  I remember
one of the big issues was *network* and the likes (which is frankly an
issue with other languages as well), but from the sound of this post,
I assume there's more.

> Their contract would involve the initial setup of CI tasks able to
> produce MSIX packages

Hopefully that wouldn't become the only way to download GHC.

> Ideally we could have a GUI to install libraries easily, like many
> GNU/Linux package managers offer.

Sounds great, but is it reasonable? GNU/Linux package managers AFAIK
don't install Haskell libraries either.

> The important thing to keep in mind is that the GNU/Linux and macOS
> users *cannot* hold the Windows users to the same standards in
> terms of CLI usability.

It's true that one-liners and scripting is harder in Cmd, but simple
commands (no pipes, no flow control etc.) that are the bread and
butter for developers work just fine.  I sense I'm missing some
context; why is this an issue?

-- 
David Macek
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Re: [Haskell-cafe] Decorating exceptions with backtrace information

2020-05-13 Thread Ben Franksen
Am 12.05.20 um 23:29 schrieb Henning Thielemann:
> A stack overflow sounds like unlimited recursion and thus like a
> programming error.

Perhaps it was just one recursion to many? Computer memory is limited.
Heap overflow is also quite possible even with a program that is
provably terminating. I have used 'ulimit -v' in the past to force ghc
to fail rather than having to reboot my machine :-/

> In contrast to that, a program must be prepared for a
> failure of "malloc".

I don't see any essential difference between allocation by the runtime
and explicit allocation using malloc. I think this is a good thing that
in Haskell you /can/ recover from such a condition.

> Memory exhaustion is an IO exception, it should be
> explicit in the type.

Then it must be explicit in all types, since in general all computations
may exhaust the available memory. And then what use would that type
information have?

> Are MVar deadlocks always detected by the runtime system?

My guess is that deadlock detection in general is undecidable i.e. with
more than one MVar present, but I may be wrong about that.

Cheers
Ben

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A future for the Windows packaging situation.

2020-05-13 Thread Hécate

Dear GHC devs, dear maintainers,

Following a discussion that took place on #ghc, I wish to spread it to 
the whole mailing-list, in order to receive some feedback,
and plan for the future now that it has become clear that the present is 
rather bleak.


As some of you may have seen from the long threads in haskell-cafe@, 
countless steps of various difficulty for Windows users
(excluding power-users) need to be taken in order to have a proper 
working GHC / Haskell installation on their machine.
Moreover, some defiance against Chocolatey has come to our ears, due to 
the mailing-list registration form that appears
when one desires to download this package manager. I shall speak for 
myself by saying that I do not wish the that the Windows
Haskell developers need to become a special combo of Chocolatey 
maintainers and Windows power users.
Some GNU/Linux distributions such as Exherbo have made this their creed, 
the major difference being that they actually give

the tools to make such a thing possible.

The point of my email to you all is the following: I suggest that 
Haskell.org, the 501(c)(3) established in NY which, If I am not mistaken,
holds the funds from various individual donations, the Amazon Smile 
programme and Software in the Public Interest grants,
hires a company to establish a strong technological basis regarding 
Windows packaging. I am not talking of delegating the maintaining task
to an external entity, but to provide the foundations upon which 
volunteers will be able to keep things running.
Training in such matters would also be beneficial, so that newcomers can 
learn on the spot how to best interact with this.


Their contract would involve the initial setup of CI tasks able to 
produce MSIX packages, while the people in charge of the haskell.org
landing page would ease the user experience by providing clearer ways to 
install GHC on various platforms.
Ideally we could have a GUI to install libraries easily, like many 
GNU/Linux package managers offer.


That being said, I was also suggested the idea of a grant and/or 
sponsorship. What we need is less a capitalist framework around that task
and more of an incentive to invest a serious amount of work and quality 
so that it becomes, at last, the non-issue it should have always been.


The important thing to keep in mind is that the GNU/Linux and macOS 
users *cannot* hold the Windows users to the same standards in
terms of CLI usability. I cannot weigh in my opinion on the most recent 
iterations of PowerShell, but Windows XP's cmd.exe was

excruciating, to say the least.

Now, I know some of you will prefer to have this task handled by 
competent volunteers, but I am under the moral obligation to say
that expecting salvation and better tomorrows from people who have yet 
to make their presence known in the thirty years of existence
of our dear language, is at best mild delusion, at worse folly that will 
only widen the gap between what is needed to get Haskell up and
running smoothly on the Windows platform and the average skill of 
Windows users.


I am not suggesting that my email is The True Way to follow so that 
everything is fixed forever,
and if we can, as a community, arrive to some satisfying workflow that 
would benefit rather than alienate

our Windows user base, this would would be wonderful.


Thank you for reading until the end.

Cheers,
Hécate.

PS: I am in no way trying to berate anyone for their implied 
incompetence, or imply that Windows users are stupid and/or 
technologically impaired.
This would be misinterpreting my words and lead nowhere but to another 
OS war on another mailing-list.

PPS: I am serious. Please stay on-topic.
PPPS: I hold no share, no money or any other form of capital in any 
Windows packaging company we might or might not end up hiring for the task.
I am speaking of experience, for my company used an external contractor 
to work on our landing (non-product) page, while all hands were on deck
to support the product development effort. This allowed us to have a 
strong foundation to iterate on, and bought us countless hours of 
development time.


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