cache doctor rst

Author: smoench

.github/workflows/ci.yaml

@@ -8,6 +8,9 @@ on:
 
 name: CI
 
+env:
+    BASE_BRANCH: ${{ github.base_ref || github.ref }}
+
 jobs:
     build:
         name: Build
@@ -52,7 +55,18 @@ jobs:
             -   name: "Checkout"
                 uses: actions/checkout@v2
 
+            -   name: "Create cache dir"
+                run: mkdir .cache
+
+            -   name: "Cache DOCtor-RST"
+                uses: actions/cache@v1
+                with:
+                    path: .cache
+                    key: ${{ runner.os }}-doctor-rst-34
+
+            -   run: echo ${BASE_BRANCH}
+
             -   name: "Run DOCtor-RST"
                 uses: docker://oskarstark/doctor-rst
                 with:
-                    args: --short
+                    args: --short --cache-file=/github/workspace/.cache/doctor-rst.cache