refactor: Rework test coverage combining

Fake coverage report directly in duty.
This way it works both locally and in CI.

project/.gitlab-ci.yml

@@ -5,19 +5,19 @@ variables:
 cache:
   key: "${CI_JOB_NAME}"
   paths:
-    - .cache/pip
-    - .venv
+  - .cache/pip
+  - .venv
 
 stages:
-  - quality
-  - tests
-  - deploy
+- quality
+- tests
+- deploy
 
 .install-deps-template: &install-deps
   before_script:
-    - pip install poetry
-    - poetry --version
-    - poetry install -vv
+  - pip install poetry
+  - poetry --version
+  - poetry install -vv
 
 # Quality jobs
 
@@ -28,10 +28,7 @@ stages:
 
 check-docs:
   <<: *quality
-  script:
-    - mkdir -p build/coverage 
-    - touch build/coverage/index.html 
-    - poetry run duty check-docs
+  script: poetry run duty check-docs
 
 check-code-quality:
   <<: *quality
@@ -51,6 +48,9 @@ check-dependencies:
   <<: *install-deps
   stage: tests
   script: poetry run duty test
+  artifacts:
+    paths:
+    - .coverage-*
 
 python3.6:
   <<: *test
@@ -79,7 +79,6 @@ pages:
   - python3.8
   - python3.9
   script:
-  - poetry run duty test
   - poetry run duty coverage
   - poetry run duty docs
   coverage: '/^TOTAL.+?(\d+\.\d+\%)$/'

project/Makefile → project/Makefile.jinja

@@ -7,14 +7,16 @@ args = $(foreach a,$($(subst -,_,$1)_args),$(if $(value $a),$a="$($a)"))
 check_code_quality_args = files
 docs_serve_args = host port
 release_args = version
-test_args = cleancov match
+test_args = match
 
 BASIC_DUTIES = \
 	changelog \
 	clean \
 	coverage \
 	docs \
+	[%- if repository_provider == "github.com" %]
 	docs-deploy \
+	[%- endif %]
 	docs-regen \
 	docs-serve \
 	format \

project/config/pytest.ini

@@ -11,7 +11,6 @@ python_files =
   tests.py
 addopts =
   --cov
-  --cov-append
   --cov-config config/coverage.ini
 testpaths =
-    tests
+  tests

project/duties.py → project/duties.py.jinja

@@ -2,6 +2,7 @@
 
 import os
 import re
+import sys
 from pathlib import Path
 from shutil import which
 from typing import List, Optional, Pattern
@@ -196,6 +197,8 @@ def check_docs(ctx):
     Arguments:
         ctx: The context instance (passed automatically).
     """
+    Path("build/coverage").mkdir(parents=True, exist_ok=True)
+    Path("build/coverage/index.html").touch(exist_ok=True)
     ctx.run("mkdocs build -s", title="Building documentation", pty=PTY)
 
 
@@ -254,6 +257,7 @@ def docs_serve(ctx, host="127.0.0.1", port=8000):
     ctx.run(f"mkdocs serve -a {host}:{port}", title="Serving documentation", capture=False)
 
 
+[% if repository_provider == "github.com" -%]
 @duty
 def docs_deploy(ctx):
     """
@@ -264,19 +268,8 @@ def docs_deploy(ctx):
     """
     ctx.run("mkdocs gh-deploy", title="Deploying documentation")
 
-
-@duty
-def docs_deploy_gitlab(ctx):
-    """
-    Deploy the documentation on Gitlab Pages.
-
-    Arguments:
-        ctx: The context instance (passed automatically).
-    """
-    ctx.run("mkdocs build -s --site-dir public", title="Deploying documentation")
-
-
 
+[% endif -%]
 @duty
 def format(ctx):  # noqa: W0622 (we don't mind shadowing the format builtin)
     """
@@ -312,8 +305,9 @@ def release(ctx, version):
         ctx.run("git push --tags", title="Pushing tags", pty=False)
         ctx.run("poetry build", title="Building dist/wheel", pty=PTY)
         ctx.run("poetry publish", title="Publishing version", pty=PTY)
-        # building docs with the site_dir specified in mkdocs.yml ensures the proper path 'site' or 'public' is used and this will work
-        ctx.run("mkdocs build", title="Deploying documentation")
+        [%- if repository_provider == "github.com" %]
+        docs_deploy.run()
+        [%- endif %]
 
 
 @duty(silent=True)
@@ -324,22 +318,22 @@ def coverage(ctx):
     Arguments:
         ctx: The context instance (passed automatically).
     """
+    ctx.run("coverage combine .coverage-*", nofail=True)
     ctx.run("coverage report --rcfile=config/coverage.ini", capture=False)
     ctx.run("coverage html --rcfile=config/coverage.ini")
 
 
 @duty
-def test(ctx, cleancov: bool = True, match: str = ""):
+def test(ctx, match: str = ""):
     """
     Run the test suite.
 
     Arguments:
         ctx: The context instance (passed automatically).
-        cleancov: Whether to remove the `.coverage` file before running the tests.
         match: A pytest expression to filter selected tests.
     """
-    if cleancov:
-        ctx.run("rm -f .coverage", silent=True)
+    py_version = f"{sys.version_info.major}{sys.version_info.minor}"
+    os.environ["COVERAGE_FILE"] = f".coverage-{py_version}"
     ctx.run(
         ["pytest", "-c", "config/pytest.ini", "-n", "auto", "-k", match, "tests"],
         title="Running tests",