.drone.yml

@@ -1,7 +1,7 @@
 ---
 kind: pipeline
 type: docker
-name: python-3-8-tests
+name: test_python-3-8
 
 steps:
   - name: run tests
@@ -21,7 +21,7 @@ trigger:
 ---
 kind: pipeline
 type: docker
-name: python-3-9-tests
+name: test_python-3-9
 
 steps:
   - name: run tests
@@ -37,3 +37,23 @@ steps:
 trigger:
   event:
     - pull_request
+
+---
+kind: pipeline
+type: docker
+name: release
+
+steps:
+  - name: release new version
+    image: mwalbeck/python-poetry:1.1-3.8
+    environment:
+      POETRY_VIRTUALENVS_CREATE: "false"
+      POETRY_PYPI_TOKEN_PYPI:
+        from_secret: poetry_pypi_token
+    commands:
+      - poetry install
+      - poetry publish --build
+
+trigger:
+  event:
+    - tag

.gitignore

@@ -1,2 +1,3 @@
+__pycache__
 .pytest_cache
 dist

determine_docker_tags/__init__.py

@@ -41,6 +41,13 @@ def write_tags_to_file(tags):
         file.write(tags)
 
 
+def is_app_name_empty(app_name):
+    if not app_name or app_name.isspace():
+        raise ValueError(
+            "APP_NAME is required when VERSION_TYPE is docker_env or docker_from"
+        )
+
+
 def main():
     version_type = os.getenv("VERSION_TYPE", "")  # docker_env, docker_from or date
     app_name = os.getenv("APP_NAME", "")
@@ -61,6 +68,8 @@ def main():
         include_extra_info = "no"
 
     if version_type == "docker_env":
+        is_app_name_empty(app_name)
+
         with open(dockerfile_path) as dockerfile:
             for line in dockerfile:
                 if re.search(rf"ENV {app_name}_VERSION .*", line):
@@ -75,6 +84,8 @@ def main():
         )
 
     elif version_type == "docker_from":
+        is_app_name_empty(app_name)
+
         with open(dockerfile_path) as dockerfile:
             for line in dockerfile:
                 if re.search(rf"FROM {app_name}:.*", line):
@@ -97,6 +108,7 @@ def main():
         custom_tags = ""
 
     else:
+        print("Please specify a VERSION_TYPE or set CUSTOM_TAGS.")
         exit(-1)
 
     if custom_tags: