[Build] Add Github workflows (#9517)

As an replacement to Travis CI.

.github/workflows/superset-python.yml

@@ -0,0 +1,174 @@
+name: Python
+
+on:
+  # only build on direct push to `master` branch
+  push:
+    branches: [ master ]
+    paths:
+    - ./**/*.py
+    - superset/**
+    - tests/**
+    - requirements*.txt
+  # but also build on pull requests to any branch
+  # (the so-called feature branch)
+  pull_request:
+    paths:
+    - ./**/*.py
+    - superset/**
+    - tests/**
+    - setup.py
+    - requirements*.txt
+
+jobs:
+  lint:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        python-version: [3.6]
+    env:
+      PYTHON_LINT_TARGET: setup.py superset tests
+      CI: github-actions
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Setup Python
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      uses: apache-superset/cached-dependencies@ddf7d7f
+    - name: black
+      run: black --check $(echo $PYTHON_LINT_TARGET)
+    - name: mypy
+      run: mypy $(echo $PYTHON_LINT_TARGET)
+    - name: isort
+      run: isort --check-only --recursive $(echo $PYTHON_LINT_TARGET)
+    - name: pylint
+      # `-j 0` run Pylint in parallel
+      run: pylint -j 0 superset
+
+  test-postgres:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        # run unit tests in multiple version just for fun
+        # (3.8 is not supported yet, some dependencies need an update)
+        python-version: [3.6, 3.7]
+    env:
+      PYTHONPATH: ${{ github.workspace }}
+      SUPERSET_CONFIG: tests.superset_test_config
+      REDIS_PORT: 16379
+    services:
+      postgres:
+        image: postgres:10-alpine
+        env:
+          POSTGRES_USER: superset
+          POSTGRES_PASSWORD: superset
+        ports:
+          # Use custom ports for services to avoid accidentally connecting to
+          # GitHub action runner's default installations
+          - 15432:5432
+      redis:
+        image: redis:5-alpine
+        ports:
+          - 16379:6379
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup Python
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      uses: apache-superset/cached-dependencies@ddf7d7f
+      with:
+        run: |
+          pip-install
+          setup-postgres
+    - name: Python unit tests (PostgreSQL)
+      env:
+        SUPERSET__SQLALCHEMY_DATABASE_URI:
+          postgresql+psycopg2://superset:superset@127.0.0.1:15432/superset
+      run: |
+        ./scripts/python_tests.sh
+    - name: Upload code coverage
+      run: |
+        bash <(curl -s https://codecov.io/bash) -cF unittest,python,postgres
+
+  test-mysql:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        python-version: [3.6]
+    env:
+      PYTHONPATH: ${{ github.workspace }}
+      SUPERSET_CONFIG: tests.superset_test_config
+      REDIS_PORT: 16379
+    services:
+      mysql:
+        image: mysql:5.7
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 13306:3306
+      redis:
+        image: redis:5-alpine
+        options: --entrypoint redis-server
+        ports:
+          - 16379:6379
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup Python
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      uses: apache-superset/cached-dependencies@ddf7d7f
+      with:
+        run: |
+          pip-install
+          setup-mysql
+    - name: Python unit tests (MySQL)
+      env:
+        SUPERSET__SQLALCHEMY_DATABASE_URI: |
+          mysql+mysqldb://superset:superset@127.0.0.1:13306/superset?charset=utf8mb4&binary_prefix=true
+      run: |
+        ./scripts/python_tests.sh
+    - name: Upload code coverage
+      run: |
+        bash <(curl -s https://codecov.io/bash) -cF unittest,python,mysql
+
+  test-sqlite:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        python-version: [3.6]
+    env:
+      PYTHONPATH: ${{ github.workspace }}
+      SUPERSET_CONFIG: tests.superset_test_config
+      REDIS_PORT: 16379
+    services:
+      redis:
+        image: redis:5-alpine
+        ports:
+          - 16379:6379
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup Python
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      uses: apache-superset/cached-dependencies@ddf7d7f
+      with:
+        run: |
+          pip-install
+          mkdir ${{ github.workspace }}/.temp
+    - name: Python unit tests (SQLite)
+      env:
+        SUPERSET__SQLALCHEMY_DATABASE_URI: |
+          sqlite:///${{ github.workspace }}/.temp/unittest.db
+      run: |
+        ./scripts/python_tests.sh
+    - name: Upload code coverage
+      run: |
+        bash <(curl -s https://codecov.io/bash) -cF unittest,python,sqlite