Qyriad
6881476232
nix::fetchers::CacheImpl uses $XDG_CACHE_HOME, or its default based on $HOME, to store its SQLite database. If the current process can't write to that directory for whatever reason, though, any eval-time fetching would fail just initializing the cache. With this change, IO errors initializing the fetcher cache are logged but ignored, and nix::fetchers::CacheImpl falls back to an in-memory¹ database instead. Notably, this will fix any uses eval fetching while Lix itself is being run in a derivation builder (such as during tests), as the derivation builder does not set $XDG_CACHE_HOME, and sets $HOME to the non-existent directory /homeless-shelter. Before: $ env -u XDG_CACHE_HOME HOME=/homeless-shelter nix -Lv eval --impure -E 'fetchTarball "https://git.lix.systems/lix-project/lix/archive/main.tar.gz"' error: … while calling the 'fetchTarball' builtin at «string»:1:1: 1| fetchTarball "https://git.lix.systems/lix-project/lix/archive/main.tar.gz" | ^ error: creating directory '/homeless-shelter': Permission denied After: $ env -u XDG_CACHE_HOME HOME=/homeless-shelter nix -Lv eval --impure -E 'fetchTarball "https://git.lix.systems/lix-project/lix/archive/main.tar.gz"' warning: ignoring error initializing Lix fetcher cache: error: creating directory '/homeless-shelter': Permission denied "/nix/store/s9lxdnn0awp37n560bg4fgr497ah4hvw-source" ¹: https://www.sqlite.org/inmemorydb.html Change-Id: I15c38c9baaf215fc6e192b8a4c70b9692a69bc22
Lix
Lix is an implementation of Nix, a powerful package management system for Linux and other Unix systems that makes package management reliable and reproducible.
Read more about us at https://lix.systems.
Installation
On Linux and macOS the easiest way to install Nix is to run the following shell command (as a user other than root):
$ curl -sSf -L https://install.lix.systems/lix | sh -s -- install
For systems that already have Nix installed, such as NixOS systems, read our install page
Building And Developing
See our Hacking guide in our manual for instruction on how to to set up a development environment and build Lix from source.
Additional Resources
License
Lix is released under the LGPL v2.1.