From 55cc7694e4bf5279703fed3b9574ddc7ea80c4d1 Mon Sep 17 00:00:00 2001
From: Jean-Paul Calderone <exarkun@twistedmatrix.com>
Date: Fri, 18 Oct 2019 15:09:02 -0400
Subject: [PATCH] Try having CircleCI cache for the huge system-tests.nix
build.
---
.circleci/config.yml | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/.circleci/config.yml b/.circleci/config.yml
index ae8ac923..4b26b975 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -46,8 +46,35 @@ jobs:
# Required for the checkout step
nix-env -i git openssh
+ - restore_cache:
+ # Get all of Nix's state relating to the particular revision of
+ # nixpkgs we're using. It will always be the same. CircleCI
+ # artifacts and nixpkgs store objects are probably mostly hosted in
+ # the same place (S3) so there's not a lot of difference for
+ # anything that's pre-built. For anything we end up building
+ # ourselves, though, this saves us all of the build time (less the
+ # download time).
+ #
+ # Read about caching dependencies: https://circleci.com/docs/2.0/caching/
+ name: "Restore Nix Store Paths"
+ keys:
+ # Construct cache keys that allow sharing as long as nixpkgs
+ # revision is unchanged.
+ #
+ # If nixpkgs changes then potentially a lot of cached packages for
+ # the base system will be invalidated so we may as well drop them
+ # and make a new cache with the new packages.
+ - privatestorageio-nix-store-v1-{{ checksum "nixpkgs.rev" }}
+ - privatestorageio-nix-store-v1-
+
- "checkout"
+ - save_cache:
+ name: "Cache Nix Store Paths"
+ key: privatestorageio-nix-store-v1-{{ checksum "nixpkgs.rev" }}
+ paths:
+ - "/nix"
+
- run:
name: "Run Tests"
command: |
--
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