snix/contrib/fetchroots
edef 7b20d0dac1 feat(contrib/fetchroots): track git revisions
Change-Id: I3af0a4486a8685191adc28210162661fae6cfc3c
Reviewed-on: https://cl.snix.dev/c/snix/+/30290
Reviewed-by: Florian Klink <flokli@flokli.de>
Tested-by: besadii
2025-04-04 16:41:32 +00:00
..
src feat(contrib/fetchroots): track git revisions 2025-04-04 16:41:32 +00:00
.gitignore chore(users/edef): move to contrib 2025-03-17 17:15:08 +00:00
Cargo.lock feat(contrib/fetchroots): track git revisions 2025-04-04 16:41:32 +00:00
Cargo.nix feat(contrib/fetchroots): track git revisions 2025-04-04 16:41:32 +00:00
Cargo.toml feat(contrib/fetchroots): track git revisions 2025-04-04 16:41:32 +00:00
default.nix chore(users/edef): move to contrib 2025-03-17 17:15:08 +00:00
README.md chore(users/edef): move to contrib 2025-03-17 17:15:08 +00:00

fetchroots

This tool is part of a suite of tools built to manage cache.nixos.org.

This tool's purpose is to build an index of all the GC roots from the channels.nixos.org releases. The result is then combined with other tools.

It does this by:

  1. Listing all the release files in the bucket.
  2. Getting the data for each of the release.
  3. Putting them in a local parquet file.

Getting started

In order to run this, you'll need AWS SSO credentials from the NixOS Infra team.

Get the creds from https://nixos.awsapps.com/start/ -> LBNixOS_Dev_PDX -> AWSReadOnlyAccess.

Run mg run, you should see a progress bar.

Congrats, you now have a roots.parquet file. You can now load it with python polars-rs or clickhouse.

roots.parquet file format

  • key (String): the release, eg nixos/22.11-small/nixos-22.11.513.563dc6476b8
  • timestamp (DateTime): the timestamp of the GC roots file for this release
  • store_path_hash (List[Binary]): hash part of the store paths rooted by this release

Development

When the Cargo.lock changes, run mg run //tools:crate2nix-generate.

To build the project, run mg build.

To get a dev environment, run nix-shell -p cargo.