Use Docker bind mounts for persistent caching

Author: griggt

.github/workflows/ci.yaml

@@ -20,7 +20,12 @@ env:
 jobs:
   test:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
     if: "!(github.event_name == 'push' &&
            startsWith(github.event.ref, 'refs/tags/sbt-dotty-'))"
 
@@ -44,7 +49,12 @@ jobs:
 
   test_bootstrapped:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
     if: "!(github.event_name == 'push' &&
            startsWith(github.event.ref, 'refs/tags/sbt-dotty-'))"
 
@@ -108,7 +118,12 @@ jobs:
 
   community_build_a:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
 
     steps:
       - name: Checkout cleanup script
@@ -131,7 +146,12 @@ jobs:
 
   community_build_b:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
 
     steps:
       - name: Checkout cleanup script
@@ -154,7 +174,12 @@ jobs:
 
   test_sbt:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
     if: (
           github.event_name == 'push' &&
           startsWith(github.event.ref, 'refs/tags/')
@@ -176,7 +201,13 @@ jobs:
 
   test_java8:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
+
     if: "(
           github.event_name == 'push' &&
           startsWith(github.event.ref, 'refs/tags/') &&
@@ -202,7 +233,12 @@ jobs:
 
   publish_nightly:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
     needs: [test, test_bootstrapped, community_build_a, community_build_b, test_sbt, test_java8]
     if: github.event_name == 'schedule'
     env:
@@ -228,7 +264,12 @@ jobs:
 
   nightly_documentation:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
     needs: [publish_nightly]
     if: github.event_name == 'schedule'
     env:
@@ -261,7 +302,12 @@ jobs:
 
   publish_release:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
     needs: [test, test_bootstrapped, community_build_a, community_build_b, test_sbt, test_java8]
     if: github.event_name == 'push' &&
         startsWith(github.event.ref, 'refs/tags/') &&
@@ -335,7 +381,12 @@ jobs:
 
   release_documentation:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
     needs: [publish_release]
     if: github.event_name == 'push' &&
         startsWith(github.event.ref, 'refs/tags/') &&
@@ -371,7 +422,12 @@ jobs:
 
   publish_sbt_release:
     runs-on: [self-hosted, Linux]
-    container: lampepfl/dotty:2020-09-08
+    container:
+      image: lampepfl/dotty:2020-09-08
+      volumes:
+        - ${{ github.workspace }}/../../cache/sbt:/root/.sbt
+        - ${{ github.workspace }}/../../cache/ivy:/root/.ivy2/cache
+        - ${{ github.workspace }}/../../cache/general:/root/.cache
     needs: [community_build_a, community_build_b, test_sbt]
     if: github.event_name == 'push' &&
         startsWith(github.event.ref, 'refs/tags/sbt-dotty-')