tests: Fix coverage reporting

Coverage reporting wasn't migrated into the docker container and
therefore did nothing at all.

.coveragerc

@@ -1,6 +1,3 @@
-[report]
-omit = */python2.7/*,*/test*,*/__init__.py
-[paths]
-source =
-    .
-    /root/.vim/bundle/taskwiki
+[run]
+source = taskwiki
+data_file = /tmp/taskwiki-coverage/.coverage

.travis.yml

@@ -8,21 +8,11 @@ env:
   - TASK_VERSION=v2.4.4
   - TASK_VERSION=v2.5.0
   - TASK_VERSION=v2.5.1
-python:
-  - "3.6"
 services:
   - docker
 install:
-  # Install coverage dependencies
-  - pip install coverage coveralls
   # Build the docker container
   - pushd $TRAVIS_BUILD_DIR
   - docker-compose build --build-arg TASK_VERSION=$TASK_VERSION tests
 script:
   - make test
-after_success:
-  - ls /tmp/taskwiki-coverage
-  - mv /tmp/taskwiki-coverage/.coverage.* . || echo ok
-  - coverage combine
-  - coverage report
-  - coveralls

Makefile

@@ -8,5 +8,10 @@ test:
 pytest:
 	$(PYTHON) -m pytest -vv $(PYTEST_FLAGS) tests/
 
+cover-pytest: pytest
+	coverage combine
+	coverage report
+	if [ "$$TRAVIS" ]; then coveralls; fi
+
 xvfb-%:
 	xvfb-run --server-args=-noreset $(MAKE) $*

docker-compose.yml

@@ -8,6 +8,10 @@ services:
     security_opt:
       - label=type:container_runtime_t
     tty: true
-    command: make xvfb-pytest
+    command: make xvfb-cover-pytest
     environment:
       PYTEST_FLAGS: "-o cache_dir=/tmp/pytest-cache ${PYTEST_FLAGS:-}"
+      TRAVIS:
+      TRAVIS_JOB_ID:
+      TRAVIS_BRANCH:
+      TRAVIS_PULL_REQUEST: