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From: Stephen Leake <stephen_leake@stephe-leake.org>
Subject: Re: yet another Ada web site?
Date: Fri, 14 Oct 2022 04:19:05 -0700	[thread overview]
Message-ID: <8635bqveja.fsf@stephe-leake.org> (raw)
In-Reply-To: tibc8b$8q6$1@gioia.aioe.org

"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On 2022-10-14 10:41, Fabien Chouteau wrote:
>> On Thursday, October 13, 2022 at 8:58:20 AM UTC+2, Dmitry A. Kazakov wrote:
>>> It seems so. Multiple versions at once are not supported. E.g. when you
>>> are working on two projects both dependent on different versions of
>>> another project:
>>>
>>> B -> A.1
>>> C -> A.2
>> Yes of course, different crates can depend on different version of
>> the same crate.
>
> It is about whether both A's can be installed and coexist on the same
> machine.

In Alire, "installed" means "checked out the source code into a local
directory".

If A depends on a system library that is a shared object file, and those
are different versions, then it depends on the OS; Debian can handle
this nicely, Windows only via separate directories and search paths.


>>> Or even the same project, e.g. when doing some migration from one
>>> version to another.
>> Not sure how you would do that? Link two different version of the
>> same library in an executable? That's not going to work.
>
> Same as above. You have B.1 -> A.1 and B.* -> A.2. You want to install
> both A.1 and A.2 and work on B.* while checking on B.1.

And the solution is the same as well.

> In the long gone time of common sense, a project code management
> system would use a virtual file system and map different parts of the
> projects graph onto a structure of folders arranged by versions. 

What prevents that now?

-- 
-- Stephe

  reply	other threads:[~2022-10-14 11:19 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-25 10:01 yet another Ada web site? Maxim Reznik
2022-08-26 18:58 ` Paul Rubin
2022-08-27  9:12 ` Rene
2022-08-27  9:53   ` Nasser M. Abbasi
2022-08-28  7:21     ` Simon Wright
2022-08-28  7:50     ` Dmitry A. Kazakov
2022-08-28 10:26       ` Luke A. Guest
2022-09-16 15:25         ` Maxim Reznik
2022-09-16 17:07           ` Luke A. Guest
2022-09-16 17:34           ` Stephen Leake
2022-09-16 18:45             ` Jere
2022-09-17  9:45               ` Luke A. Guest
2022-09-16 18:49           ` Jere
2022-09-17 13:08           ` Move semantics (was: yet another Ada web site?) G.B.
2022-09-19 17:04             ` Move semantics Stephen Leake
2022-09-19 18:50               ` Paul Rubin
2022-09-20 11:44                 ` AdaMagica
2022-09-20 14:46                   ` Niklas Holsti
2022-09-20 19:39                   ` Paul Rubin
2022-09-24  6:54                 ` Stephen Leake
2022-09-18  8:47           ` yet another Ada web site? grosdan
2022-09-18 10:57             ` Dmitry A. Kazakov
2022-09-18 16:28             ` Luke A. Guest
2022-09-19 17:02             ` Stephen Leake
2022-09-19  6:39           ` Emmanuel Briot
2022-09-30 10:29   ` shtps
2022-09-30 12:29     ` Niklas Holsti
2022-10-09 16:13       ` Stephen Leake
2022-10-12  4:21         ` Paul Jarrett
2022-10-13  0:06           ` Stephen Leake
2022-10-13  6:58             ` Dmitry A. Kazakov
2022-10-14  8:41               ` Fabien Chouteau
2022-10-14 10:05                 ` Dmitry A. Kazakov
2022-10-14 11:19                   ` Stephen Leake [this message]
2022-10-14 13:05                     ` Dmitry A. Kazakov
2022-10-16  8:54                       ` G.B.
2022-10-16  9:20                         ` Dmitry A. Kazakov
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