Utilize caching for builds (#44)

Signed-off-by: Sayan Nandan <nandansayan@outlook.com>

.ci.yml

@@ -1,11 +1,25 @@
 kind: pipeline
 name: Build and Test
+environment:
+  CARGO_TARGET_DIR: /drone/src/target
+  CARGO_BUILD_TARGET_DIR: /drone/src/target
 
 steps:
+  - name: restore-cache
+    image: plugins/s3-cache
+    settings:
+      path: /tdbcache/linux64
+      pull: true
+      endpoint:
+        from_secret: MIO_WWW
+      access_key:
+        from_secret: MIO_ACCESS
+      secret_key:
+        from_secret: MIO_KEY
+      restore: true
   - name: run-tests
     image: rust
     commands:
-      - cargo build --verbose
       - cargo test --verbose
 
   - name: build-docker-binary
@@ -36,3 +50,32 @@ steps:
       event:
         - tag
         - push
+  - name: rebuild-cache
+    image: plugins/s3-cache
+    settings:
+      path: /tdbcache/linux64
+      pull: true
+      endpoint:
+        from_secret: MIO_WWW
+      access_key:
+        from_secret: MIO_ACCESS
+      secret_key:
+        from_secret: MIO_KEY
+      rebuild: true
+      mount:
+        - target
+
+  - name: flush-cache
+    image: plugins/s3-cache
+    settings:
+      path: /tdbcache/linux64
+      flush_path: /tdbcache/linux64
+      pull: true
+      endpoint:
+        from_secret: MIO_WWW
+      access_key:
+        from_secret: MIO_ACCESS
+      secret_key:
+        from_secret: MIO_KEY
+      flush: true
+      flush_age: 30