robin/attic-action
1
0
Fork 0
mirror of https://codeberg.org/icewind/attic-action.git synced 2026-06-03 09:34:11 +02:00
Code Issues Projects Releases Packages Wiki Activity

README: wording on why

Browse source
This commit is contained in:
Domen Kožar 2019-12-19 17:54:19 +01:00
commit cdc802d712
No known key found for this signature in database
GPG key ID: C2FFBCAFD2C24246
1 changed files with 3 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

9
README.md
View file

@ -15,14 +15,11 @@ Directory-based caching on a typical CI doesn't work well for Nix.
`/nix/store` is a global storage of everything Nix operates on. These are
your sources, patches, tarballs, packages, configuration.
Caching `/nix/store` is time consuming as Nix only appends store paths to it.
As you invoke new builds, those will contain all your sources throughout the whole history of your build.
A directory-based cache requires that downloading a whole store, including the irrelevant parts. cachix-action will only fetch what's needed by configuring a Nix binary cache.
Garbage collecting is also suboptimal, as caching is hard to invalidate correctly
between different changes and branches.
When the build is done, cachix-action only has to upload the new store paths, rather than syncing the whole store.
Cachix avoids this by keeping your `/nix/store` hosted and only downloads the bits you
need for the given build (in parallel) using Nix substituters.
Purging paths from a directory-based cache is not feasible because it'd have to be aware of all branches and their respective contents somehow.
## Usage