GNU bug report logs - #49216
error with guix download and redirections

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From: ATuin <mlfoss <at> runbox.eu>
To: 49216 <at> debbugs.gnu.org
Subject: bug#49216: error with guix download and redirections
Date: Thu, 24 Jun 2021 23:32:20 +0200

Hi!

Today I tried to reconfigure my system, which involves building the nix
derivation, and i got the following error:

```
failed to download "/tmp/guix-file.uteXdE" from "https://nixos.org/releases/nix/nix-2.3.12/nix-2.3.12.tar.xz"
guix download: error: https://nixos.org/releases/nix/nix-2.3.12/nix-2.3.12.tar.xz: download failed
```

when trying to get the file using `guix download
https://nixos.org/releases/nix/nix-2.3.12/nix-2.3.12.tar.xz` it failed
in the same way:

```
Starting download of /tmp/guix-file.fhLzo0
- From https://nixos.org/releases/nix/nix-2.3.12/nix-2.3.12.tar.xz...
Throw to key `gnutls-error' with args `(#<gnutls-error-enum Resource temporarily unavailable, try again.> handshake)'.
```

Using wget worked (also using GNUtls) but it gave me 3 times the
`Resource temporarily unavailable` error.

```
GnuTLS: Resource temporarily unavailable, try again.
GnuTLS: Resource temporarily unavailable, try again.
GnuTLS: Resource temporarily unavailable, try again.
HTTP request sent, awaiting response... 302 Found
Location: https://releases.nixos.org/nix/nix-2.3.12/nix-2.3.12.tar.xz [following]
[...]
Saving to: ‘nix-2.3.12.tar.xz.1’
```

Seems that the original URL does a redirection into
`https://releases.nixos.org/nix/nix-2.3.12/nix-2.3.12.tar.xz`. When
running guix download against the final url it works.

I guess that guix download is not dealing properly with the redirection
or with the GNUtls error GNUTLS_E_AGAIN which seems the be the one
causing that error message.

Greets, Aitor.

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