wroclaw-git-backups/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2025-07-07 10:11:47 +02:00
Code Activity

Make the hashes mirrors used by builtins.fetchurl configurable

Browse source 
In particular, this allows it to be disabled in our tests.
This commit is contained in:
Eelco Dolstra 2017-07-17 13:07:08 +02:00
parent 4ec6eb1fdf
commit 49304bae81
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
4 changed files with 42 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

28
doc/manual/command-ref/conf-file.xml
View file

@ -660,6 +660,34 @@ password <replaceable>my-password</replaceable>
</varlistentry>
<varlistentry xml:id="conf-hashed-mirrors"><term><literal>hashed-mirrors</literal></term>
<listitem><para>A list of web servers used by
<function>builtins.fetchurl</function> to obtain files by
hash. The default is
<literal>http://tarballs.nixos.org/</literal>. Given a hash type
<replaceable>ht</replaceable> and a base-16 hash
<replaceable>h</replaceable>, Nix will try to download the file
from
<literal>hashed-mirror/<replaceable>ht</replaceable>/<replaceable>h</replaceable></literal>.
This allows files to be downloaded even if they have disappeared
from their original URI. For example, given the default mirror
<literal>http://tarballs.nixos.org/</literal>, when building the derivation
<programlisting>
builtins.fetchurl {
url = https://example.org/foo-1.2.3.tar.xz;
sha256 = "2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae";
}
</programlisting>
Nix will attempt to download this file from
<literal>http://tarballs.nixos.org/sha256/2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae</literal>
first. If it is not available there, if will try the original URI.</para></listitem>
</varlistentry>
</variablelist>
</para>