From: Stephen Paul Weber <singpolyma@singpolyma.net>
To: guix-devel@gnu.org
Cc: 0@psycoti.ca
Subject: git-fetch without a hash
Date: Tue, 20 Dec 2022 22:04:29 -0500 [thread overview]
Message-ID: <Y6J3vasfRdO+cYgC@singpolyma-beefy.lan> (raw)
[-- Attachment #1: Type: text/plain, Size: 1268 bytes --]
Hello Guix!
It seem that url-fetch will work without a hash (that is, with (sha256 #f))
but git-fetch will not.
As near as I can tell this is because git-fetch uses a fixed derivation
build going via nix/build.cc stuff which contains this line:
if (i.second.hash == "") fixedOutput = false;
And this results in /etc/resolv.conf not getting written and DNS resolution
failing.
Now, I *think* by my reading that it is intended for *only* fixed-output
derivations to have network access, because otherwise the operation would be
impure?
And then url-fetch is just not actually ending up in a build container and
so it works even when it isn't fixed-output?
However, there's no real reason that git-fetch *needs* to be fixed-output in
terms of having a hash pre-defined, at least for local development and other
purposes. So is there a way around this? If having a way around it is not
desirable should url-fetch consider this an error as well?
Finally, *if* git-fetch should not allow this, the current error message is
beyond confusing (DNS resolution fails during git fetch and it tries to fall
back to SWH). So should git-fetch check for hash of #f and raise at that
point with a better error message in that case?
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next reply other threads:[~2022-12-21 3:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-21 3:04 Stephen Paul Weber [this message]
2022-12-21 22:49 ` git-fetch without a hash Ludovic Courtès
2023-01-03 19:31 ` Stephen Paul Weber
2023-01-03 21:34 ` Ludovic Courtès
2023-01-05 10:06 ` Simon Tournier
2023-01-09 11:16 ` Ludovic Courtès
2023-01-11 15:34 ` Simon Tournier
2023-02-05 17:44 ` bokr
2023-02-06 17:01 ` Simon Tournier
2023-01-09 17:13 ` Ludovic Courtès
2023-01-09 17:35 ` Stephen Paul Weber
2023-01-17 16:01 ` Ludovic Courtès
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://guix.gnu.org/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Y6J3vasfRdO+cYgC@singpolyma-beefy.lan \
--to=singpolyma@singpolyma.net \
--cc=0@psycoti.ca \
--cc=guix-devel@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/guix.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).