wip: pre-cache

.github/workflows/ci.yml

@@ -16,9 +16,20 @@ env:
   MIX_ENV: test
 
 jobs:
+  # Just runs the setup, which has the side effect of updating caches if needed.
+  # All other jobs require this one to complete first, so they don't all end up
+  # doing this work independently.
+  pre-cache:
+    name: Setup
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/setup
+
   ex-compile:
     name: Elixir Warnings
     runs-on: ubuntu-latest
+    needs: pre-cache
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
@@ -27,6 +38,7 @@ jobs:
   ex-credo:
     name: Elixir Credo
     runs-on: ubuntu-latest
+    needs: pre-cache
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
@@ -35,6 +47,7 @@ jobs:
   ex-dialyzer:
     name: Elixir Dialyze
     runs-on: ubuntu-latest
+    needs: pre-cache
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
@@ -43,6 +56,7 @@ jobs:
   ex-format:
     name: Elixir Format
     runs-on: ubuntu-latest
+    needs: pre-cache
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup
@@ -51,6 +65,7 @@ jobs:
   ex-tests:
     name: Elixir Tests
     runs-on: ubuntu-latest
+    needs: pre-cache
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/setup