exclude known tags

Author: masci

.drone.yml

@@ -8,7 +8,7 @@ steps:
   commands:
     # Check if the Go code is properly formatted and run the linter
     - task check
-    # Ensure protobufs compile
+    # Ensure protobufs compile without errors
     - task protoc
 
 - name: build
@@ -28,10 +28,10 @@ steps:
     - pip install -r test/requirements.txt
     - task test-integration
 
-# Contrary to other CI platforms, uploading reports to Codecov requires Drone to provide a token.
-# To avoid exposing the Codecov token to external PRs, we only upload coverage when we merge on
-# `master`.
 - name: coverage
+  # Contrary to other CI platforms, uploading reports to Codecov requires Drone to provide a token.
+  # To avoid exposing the Codecov token to external PRs, we only upload coverage when we merge on
+  # `master`.
   image: arduino/arduino-cli:drone-1.0
   environment:
     CODECOV_TOKEN:
@@ -51,6 +51,7 @@ name: release
 
 steps:
 - name: fetch
+  # extra step needed to fetch tags after cloning
   image: docker:git
   commands:
   - git fetch --tags
@@ -65,9 +66,16 @@ steps:
 
 trigger:
   event:
+    # releases are triggered by tags only
     - tag
   status:
+    # skip the release if the previous build failed
     - success
+  ref:
+    exclude:
+    # exclude the tags used to build Docker images for drone
+    - refs/tags/builder-*
+    - refs/tags/drone-*
 
 depends_on:
   - test