From 4c0f070d27ae4ba985d25cf6ce9e0ae97b9a34b4 Mon Sep 17 00:00:00 2001
From: AviiNL <me@avii.nl>
Date: Wed, 8 Mar 2023 17:51:47 +0100
Subject: [PATCH] Add caching layer to CI (#277)

Added a caching layer to the CI

This creates a cache on first run (should exist because of this pr now)
The hash is calculated from the Cargo.toml files (recursively if i've
done it correctly)
So whenever a Cargo.toml file changes, it invalidates the cache.

Local crates are _not_ cached, so they get recompiled regardless, but it
already shaves off like half the total time from the action runners.
---
 .github/workflows/ci.yml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9e9363b..3ae03fb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,6 +24,20 @@ jobs:
       with:
         components: clippy, rustfmt
     - run: cp crates/playground/src/playground.template.rs crates/playground/src/playground.rs
+    - name: Set up cargo cache
+      uses: actions/cache@v3
+      continue-on-error: false
+      with:
+        path: |
+          ~/.cargo/bin/
+          ~/.cargo/registry/index/
+          ~/.cargo/registry/cache/
+          ~/.cargo/git/db/
+          target/
+        key: ${{ runner.os }}-cargo-target-${{ hashFiles('**/Cargo.toml') }}
+        restore-keys: |
+          ${{ runner.os }}-cargo-target-${{ hashFiles('**/Cargo.toml') }}
+          ${{ runner.os }}-cargo-target
     - name: Validate formatting
       run: cargo fmt --all -- --check
     - name: Validate documentation