chore: changed tests workflow to use cache

ElixirCL · Jan 13, 2025 · dfda8f5 · dfda8f5
1 parent 27ac286
commit dfda8f5
Showing 1 changed file with 36 additions and 4 deletions.
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
@@ -14,14 +14,46 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: cachix/install-nix-action@v26
+      - uses: nixbuild/nix-quick-install-action@v29
 
-      - uses: cachix/cachix-action@v14
-        with:
-          name: devenv
+      - uses: DeterminateSystems/magic-nix-cache-action@v2
 
       - name: Install devenv.sh
         run: nix profile install nixpkgs#devenv
 
+      - name: Cache deps
+        id: cache-deps
+        uses: actions/cache@v4
+        env:
+          cache-name: cache-elixir-deps
+        with:
+          path: tololo/deps
+          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ env.cache-name }}-
+
+      # Step: Define how to cache the `_build` directory. After the first run,
+      # this speeds up tests runs a lot. This includes not re-compiling our
+      # project's downloaded deps every run.
+      - name: Cache compiled build
+        id: cache-build
+        uses: actions/cache@v4
+        env:
+          cache-name: cache-compiled-build
+        with:
+          path: tololo/_build
+          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ env.cache-name }}-
+            ${{ runner.os }}-mix-
+
+      # Step: Conditionally bust the cache when job is re-run.
+      - name: Clean to rule out incremental build as a source of flakiness
+        if: github.run_attempt != '1'
+        run: |
+          mix deps.clean --all
+          mix clean
+        shell: sh
+
       - name: Build the devenv shell and run tests
         run: devenv test