ci: add base pipeline with deps cache and pre-commit

.drone.yml

@@ -0,0 +1,67 @@
+---
+kind: pipeline
+type: docker
+name: build
+
+trigger:
+  ref:
+    - refs/heads/**
+    - refs/tags/v*
+environment:
+  REGISTRY_HOST: https://git.roboces.dev
+  DESTINATION_PREFIX: git.roboces.dev/catalin/halig
+  PRE_COMMIT_HOME: /drone/src/.cache/.pre-commit
+
+steps:
+- name: restore cache
+  image: meltwater/drone-cache
+  pull: true
+  environment:
+    AWS_ACCESS_KEY_ID:
+      from_secret: AWS_ACCESS_KEY_ID
+    AWS_SECRET_ACCESS_KEY:
+      from_secret: AWS_SECRET_ACCESS_KEY
+  settings:
+    restore: true
+    bucket: halig-cache
+    endpoint: https://s3.fukurokuju.dev
+    region: us-east-1
+    path_style: true
+    mount:
+      - .venv
+      - .cache/.pre-commit
+
+- name: install dependencies
+  pull: true
+  image: git.roboces.dev/catalin/poetry:beta
+  commands:
+    - poetry config virtualenvs.in-project 1
+    - poetry install --with linters
+
+- name: lint
+  pull: true
+  image: git.roboces.dev/catalin/poetry:beta
+  commands:
+    - .venv/bin/pre-commit run --all-files --color always
+
+- name: rebuild cache
+  image: meltwater/drone-cache
+  pull: true
+  environment:
+    AWS_ACCESS_KEY_ID:
+      from_secret: AWS_ACCESS_KEY_ID
+    AWS_SECRET_ACCESS_KEY:
+      from_secret: AWS_SECRET_ACCESS_KEY
+  settings:
+    rebuild: true
+    path_style: true
+    bucket: halig-cache
+    endpoint: https://s3.fukurokuju.dev
+    region: us-east-1
+    mount:
+      - .venv
+      - .cache/.pre-commit
+  when:
+    status:
+      - failure
+      - success