use different caching method

.drone.yml

@@ -3,35 +3,42 @@ type: docker
 name: default
 
 steps:
-- name: restore-cache
-  image: drillster/drone-volume-cache
-  volumes:
-  - name: cache
-    path: /cache
-  settings:
-    restore: true
-    mount:
-      - /root/.cache/pip
+  - name: restore-cache-with-filesystem
+    image: meltwater/drone-cache
+    settings:
+      backend: "filesystem"
+      restore: true
+      cache_key: "{{ .Repo.Name }}"
+      archive_format: "gzip"
+      filesystem_cache_root: "/tmp/cache"
+      mount:
+        - '.pipcache'
+    volumes:
+    - name: cache
+      path: /tmp/cache
 
 - name: static_analysis
   image: "python:3.8"
   commands:
-  - pip3 install pylint bandit mccabe
-  - pip3 install -r requirements.txt
+  - pip3 install --cache-dir='./.pipcache' pylint bandit mccabe
+  - pip3 install --cache-dir='./.pipcache' cython numpy==1.18.2
+  - pip3 install --cache-dir='./.pipcache' -r requirements.txt
   - find . -name "*.py" -exec python3 -m py_compile '{}' \;
   - find . -name "*.py" -exec pylint '{}' + || if [ $? -eq 1 ]; then echo "you fail"; fi
   - find . -name "*.py" -exec python3 -m mccabe --min 3 '{}' + || if [ $? -eq 1 ]; then echo "you fail"; fi
   - bandit -r . + || if [ $? -eq 1 ]; then echo "you fail"; fi
 
-- name: rebuild-cache
-  image: drillster/drone-volume-cache
-  volumes:
-  - name: cache
-    path: /cache
-  settings:
-    rebuild: true
-    mount:
-      - /root/.cache/pip
+  - name: rebuild-cache-with-filesystem
+    image: meltwater/drone-cache:dev
+    pull: true
+    settings:
+      backend: "filesystem"
+      rebuild: true
+      cache_key: "{{ .Repo.Name }}"
+      archive_format: "gzip"
+      filesystem_cache_root: "/tmp/cache"
+      mount:
+        - '.pipcache'
 
 - name: kaniko
   image: banzaicloud/drone-kaniko
@@ -56,5 +63,4 @@ steps:
 
 volumes:
   - name: cache
-    host: 
-      path: /tmp/cache
+    temp: {}

Dockerfile

@@ -7,6 +7,6 @@ ENV PIP_NO_CACHE_DIR=true
 ENV TZ Europe/Budapest
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
-RUN pip3 install -r requirements.txt
+RUN pip3 install cython numpy==1.18.2 && pip3 install -r requirements.txt
 
 ENTRYPOINT ["python3","main.py"]