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Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD)
From: |
Christopher Lemmer Webber |
Subject: |
Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD) |
Date: |
Sat, 11 Aug 2018 17:55:31 -0400 |
User-agent: |
mu4e 1.0; emacs 26.1 |
Timothy Sample writes:
> Christopher Lemmer Webber <address@hidden> writes:
>
>> Konrad Hinsen writes:
>>
>>> In my tests, all packages ended up working, but performance is indeed
>>> worse than with a Racket installation outside of Guix.
>>>
>>> It would be nice if someone with more knowledge of Racket internals
>>> could give a hint or two for debugging this issue!
>>>
>>> Konrad.
>>
>> I'm posting a bug bounty on this issue: if someone can fix this I will
>> pay them $250 USD. I don't have the time or knowledge enough of Racket
>> internals to do so myself.
>
> I have discovered a few things, but I’m not sure how to fix the
> underlying problem(s).
>
> The reason Racket is trying to recompile the OpenSSL files is because of
> a hash mismatch. This can be seen by enabling debugging output:
>
> $ PLTSTDERR=debug raco setup openssl
>
> Which says a lot of things, but most interestingly it says:
>
> --------------------------------
> ...
> compiler/cm: checking:
> /gnu/store/jx0bkmaafb8fq0mqs5ywgnxq8rbpn8j1-racket-6.12/share/racket/collects/openssl/libcrypto.rkt
> compiler/cm: different src hash... (5d9ca57f3e267d956c7b5e62578467beb8ccc1d2
> 4d21ac412723fbf33f97669c2f73f0e9367f4510)
> compiler/cm: maybe-compile-zo starting
> /gnu/store/jx0bkmaafb8fq0mqs5ywgnxq8rbpn8j1-racket-6.12/share/racket/collects/openssl/libcrypto.rkt
> compiler/cm: start-compile:
> /gnu/store/jx0bkmaafb8fq0mqs5ywgnxq8rbpn8j1-racket-6.12/share/racket/collects/openssl/libcrypto.rkt
> compiler/cm: compiling
> /gnu/store/jx0bkmaafb8fq0mqs5ywgnxq8rbpn8j1-racket-6.12/share/racket/collects/openssl/libcrypto.rkt
> open-output-file: cannot open output file
> path:
> /gnu/store/jx0bkmaafb8fq0mqs5ywgnxq8rbpn8j1-racket-6.12/share/racket/collects/openssl/compiled/tmp15340167971534016797570
> system error: Read-only file system; errno=30
> context...:
> ...
> --------------------------------
>
> This hash mismatch is caused by grafting. When the package is built,
> the path to OpenSSL gets hard-coded in a source file. The SHA-1 hash
> for this file is stored in its “.dep” file. When the output is
> grafted, the source file gets updated with a new OpenSSL path, but the
> hash does not get updated. This makes Racket think that the cached
> bytecode file is incorrect (even though it was likely grafted too),
> and it tries to recompile it. It fails because it tries to write this
> new bytecode file to the store.
Interesting... I hadn't even considered grafting. (I still wonder why
it's even trying to open *any* file in the store for output though...)
> I double checked this by trying with an ungrafted Racket, and got better
> results. (There was still a warning about writing to the store, but it
> seemed less significant.)
Cool!
> The only thing I can think of for a fix would be to patch Racket to be
> more lenient with bytecode files in the store. That is, ignore hash
> mismatches in store-files. I might give this a try later tonight if
> nobody has any better ideas.
>
> -- Tim
BTW, some examples of packages where I've had trouble, in case it helps
with testing:
- Raart
- Gregor
- crypto (seemed to work last time, not sure why it wasn't working before)
Though at this point I also can't do just "raco setup" on a local
package either, but maybe resolving this issue will fix that.
- Re: [racket-users] Using Racket's raco on on Guix(SD), Christopher Lemmer Webber, 2018/08/11
- Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD), Timothy Sample, 2018/08/11
- Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD),
Christopher Lemmer Webber <=
- Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD), Nils Gillmann, 2018/08/11
- Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD), Christopher Lemmer Webber, 2018/08/11
- Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD), Timothy Sample, 2018/08/11
- Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD), Gábor Boskovits, 2018/08/12
- Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD), Christopher Lemmer Webber, 2018/08/12
- Re: bug#30680: [racket-users] Using Racket's raco on on Guix(SD), Timothy Sample, 2018/08/12