[travis] Implement build stages

To:
  - be neatest
  - modernize travis config
  - send coverage reports only if we succeed with `Lint` stage (instead of sending it in each successful test)

Author: opacam

.travis.yml

@@ -4,13 +4,19 @@ dist: xenial  # needed for more recent python 3 and python3-venv
 
 language: generic
 
+stages:
+  - lint
+  - test
+
 services:
   - docker
 
 before_install:
   - travis_retry sudo apt update -qq
   # to successfully send the coveralls reports we need pyOpenSSL
-  - travis_retry sudo apt install -qq --no-install-recommends python2.7 python3 python3-venv python3-virtualenv python3-setuptools python3-pip python3-openssl
+  - travis_retry sudo apt install -qq --no-install-recommends
+    python2.7 python3 python3-venv python3-virtualenv python3-pip
+    python3-setuptools python3-openssl
   # (venv/virtualenv are both used by tests/test_pythonpackage.py)
   - sudo pip install tox>=2.0
   - sudo pip3 install coveralls
@@ -22,27 +28,42 @@ env:
   global:
     - ANDROID_SDK_HOME=/opt/android/android-sdk
     - ANDROID_NDK_HOME=/opt/android/android-ndk
-  matrix:
-    - COMMAND='. venv/bin/activate && cd testapps/ && python setup_testapp_python3_sqlite_openssl.py apk --sdk-dir $ANDROID_SDK_HOME --ndk-dir $ANDROID_NDK_HOME --requirements libffi,sdl2,pyjnius,kivy,python3,openssl,requests,sqlite3,setuptools'
-    # overrides requirements to skip `peewee` pure python module, see:
-    # https://github.com/kivy/python-for-android/issues/1263#issuecomment-390421054
-    - COMMAND='. venv/bin/activate && cd testapps/ && python setup_testapp_python2_sqlite_openssl.py apk --sdk-dir $ANDROID_SDK_HOME --ndk-dir $ANDROID_NDK_HOME --requirements sdl2,pyjnius,kivy,python2,openssl,requests,sqlite3,setuptools'
-    - COMMAND='. venv/bin/activate && cd testapps/ && python setup_testapp_python2.py apk --sdk-dir $ANDROID_SDK_HOME --ndk-dir $ANDROID_NDK_HOME --bootstrap sdl2 --requirements python2,numpy'
-    # builds only the recipes that moved
-    - COMMAND='. venv/bin/activate && ./ci/rebuild_updated_recipes.py'
-
-before_script:
-  # we want to fail fast on tox errors without having to `docker build` first
-  - tox -- tests/ --ignore tests/test_pythonpackage.py
-  # (we ignore test_pythonpackage.py since these run way too long!! test_pythonpackage_basic.py will still be run.)
-
-script:
-  # Run a background process to make sure that travis will not kill our tests in
-  # case that the travis log doesn't produce any output for more than 10 minutes
-  - while sleep 540; do echo "==== Still running (travis, don't kill me) ===="; done &
-  - docker build --tag=p4a --file Dockerfile.py3 .
-  - docker run -e CI -e TRAVIS_JOB_ID="$TRAVIS_JOB_ID" -e TRAVIS_BRANCH="$TRAVIS_BRANCH" p4a /bin/sh -c "$COMMAND"
-  # kill the background process started before run docker
-  - kill %1
-after_success:
-  - coveralls
+
+jobs:
+  include:
+    - stage: lint
+      name: "Tox tests and coverage"
+      script:
+        # we want to fail fast on tox errors without having to `docker build` first
+        - tox -- tests/ --ignore tests/test_pythonpackage.py
+        # (we ignore test_pythonpackage.py since these run way too long!!
+        #  test_pythonpackage_basic.py will still be run.)
+      after_success:
+        - coveralls
+
+    - &testing
+      stage: test
+      before_script:
+        # build docker image
+        - docker build --tag=p4a --file Dockerfile.py3 .
+        # Run a background process to make sure that travis will not kill our tests in
+        # case that the travis log doesn't produce any output for more than 10 minutes
+        - while sleep 540; do echo "==== Still running (travis, don't kill me) ===="; done &
+      script:
+        - docker run -e CI -e TRAVIS_JOB_ID="$TRAVIS_JOB_ID" -e TRAVIS_BRANCH="$TRAVIS_BRANCH" p4a /bin/sh -c "$COMMAND"
+      after_script:
+        # kill the background process started before run docker
+        - kill %1
+      name: Python 3 basic
+      # overrides requirements to skip `peewee` pure python module, see:
+      # https://github.com/kivy/python-for-android/issues/1263#issuecomment-390421054
+      env: COMMAND='. venv/bin/activate && cd testapps/ && python setup_testapp_python3_sqlite_openssl.py apk --sdk-dir $ANDROID_SDK_HOME --ndk-dir $ANDROID_NDK_HOME --requirements libffi,sdl2,pyjnius,kivy,python3,openssl,requests,sqlite3,setuptools'
+    - <<: *testing
+      name: Python 2 basic
+      env: COMMAND='. venv/bin/activate && cd testapps/ && python setup_testapp_python2_sqlite_openssl.py apk --sdk-dir $ANDROID_SDK_HOME --ndk-dir $ANDROID_NDK_HOME --requirements sdl2,pyjnius,kivy,python2,openssl,requests,sqlite3,setuptools'
+    - <<: *testing
+      name: Python 2 numpy
+      env: COMMAND='. venv/bin/activate && cd testapps/ && python setup_testapp_python2.py apk --sdk-dir $ANDROID_SDK_HOME --ndk-dir $ANDROID_NDK_HOME --bootstrap sdl2 --requirements python2,numpy'
+    - <<: *testing
+      name: Rebuild updated recipes
+      env: COMMAND='. venv/bin/activate && ./ci/rebuild_updated_recipes.py'