potiuk commented on a change in pull request #8393:
URL: https://github.com/apache/airflow/pull/8393#discussion_r410725421



##########
File path: .github/workflows/ci.yml
##########
@@ -17,272 +17,275 @@
 #
 
 ---
-name: Airflow
+name: CI Build
 on:
+  schedule:
+    - cron: '10 2 * * *'
   push:
-    branches: ['*']
+    branches: ['master', 'v1-10-test', 'v1-10-stable']
   pull_request:
-    branches: [master]
+    branches: ['master', 'v1-10-test', 'v1-10-stable']
 env:
-  BUILD_ID: ${{github.sha }}
   MOUNT_LOCAL_SOURCES: "false"
-  MOUNT_HOST_AIRFLOW_VOLUME: "true"
   FORCE_ANSWER_TO_QUESTIONS: "yes"
   SKIP_CHECK_REMOTE_IMAGE: "true"
+  SKIP_CI_IMAGE_CHECK: "true"
   DB_RESET: "true"
   VERBOSE: "true"
-  CI: "true"
-  # Should be a target branch
-  TRAVIS_BRANCH: "master"
-  TRAVIS: "true"
+  UPGRADE_TO_LATEST_REQUIREMENTS: "false"
+  ENABLED_INTEGRATIONS: "cassandra kerberos mongo openldap presto rabbitmq 
redis"
+  PYTHON_MAJOR_MINOR_VERSION: 3.6
+  # TODO: Enable cache registry once a master build succeeds uploading the 
images to Github registry cache
+  DISABLE_CACHE_REGISTRY: "true"
+  CACHE_REGISTRY: "docker.pkg.github.com"
+  CACHE_IMAGE_PREFIX: ${{ github.repository }}
+  CACHE_REGISTRY_USERNAME: ${{ github.actor }}
+  CACHE_REGISTRY_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
+
 jobs:
-  statics:
-    name: Static checks
+
+  static-checks-1:
+    name: "Checks: pylint, mypy"
     runs-on: ubuntu-latest
     env:
-      PYTHON_VERSION: 3.6
-      AIRFLOW_MOUNT_SOURCE_DIR_FOR_STATIC_CHECKS: "true"
-      TRAVIS_JOB_NAME: "Static"
+      MOUNT_SOURCE_DIR_FOR_STATIC_CHECKS: "true"
+      CI_JOB_TYPE: "Pylint checks for tests"
     steps:
       - uses: actions/checkout@master
-      - name: free disk space
-        run: |
-          sudo swapoff -a
-          sudo rm -f /swapfile
-          sudo apt clean
-          docker rmi $(docker image ls -aq)
-          df -h
       - uses: actions/setup-python@v1
         with:
-          python-version: ${{ env.PYTHON_VERSION }}
-      - name: "Before install"
-        run: ./scripts/ci/ci_before_install.sh
-      - name: "Static checks"
-        if: success()
+          python-version: '3.x'
+      - name: Cache pre-commit env
+        uses: actions/cache@v1
         env:
-          PYTHON_VERSION: 3.6
-        run: ./scripts/ci/ci_run_all_static_checks.sh
+          cache-name: cache-pre-commit
+        with:
+          path: ~/.cache/pre-commit
+          key: ${{ env.cache-name }}-${{ github.job }}-${{ 
hashFiles('.pre-commit-config.yaml') }}
+      - name: "Free space"
+        run: ./scripts/ci/ci_free_space_on_ci.sh
+      - name: "Build CI image"
+        run: ./scripts/ci/ci_prepare_image_on_ci.sh
+      - name: "Pylint checks for tests"
+        run: |
+          python -m pip install pre-commit \
+              --constraint 
requirements/requirements-python${PYTHON_MAJOR_MINOR_VERSION}.txt
+          ./scripts/ci/ci_run_static_checks.sh pylint-tests mypy
 
-  statics-tests:
-    name: Pylint for tests
+  static-checks-2:
+    name: "Checks: All other"
     runs-on: ubuntu-latest
     env:
-      PYTHON_VERSION: 3.6
-      AIRFLOW_MOUNT_SOURCE_DIR_FOR_STATIC_CHECKS: "true"
-      TRAVIS_JOB_NAME: "Static"
+      SKIP: pylint-tests,mypy
+      MOUNT_SOURCE_DIR_FOR_STATIC_CHECKS: "true"
+      CI_JOB_TYPE: "Static checks"
     steps:
       - uses: actions/checkout@master
       - uses: actions/setup-python@v1
         with:
-          python-version: ${{ env.PYTHON_VERSION }}
-      - name: "Before install"
-        run: ./scripts/ci/ci_before_install.sh
-      - name: "Static checks tests"
-        if: success()
+          python-version: '3.x'
+      - name: Cache pre-commit env
+        uses: actions/cache@v1
         env:
-          PYTHON_VERSION: 3.6
-        run: ./scripts/ci/ci_run_static_checks_pylint_tests.sh
+          cache-name: cache-pre-commit
+        with:
+          path: ~/.cache/pre-commit
+          key: ${{ env.cache-name }}-${{ github.job }}-${{ 
hashFiles('.pre-commit-config.yaml') }}
+      - name: "Free space"
+        run: ./scripts/ci/ci_free_space_on_ci.sh
+      - name: "Build CI image"
+        run: ./scripts/ci/ci_prepare_image_on_ci.sh
+      - name: "Static checks"
+        run: |
+          python -m pip install pre-commit \
+              --constraint 
requirements/requirements-python${PYTHON_MAJOR_MINOR_VERSION}.txt
+          ./scripts/ci/ci_run_static_checks.sh
 
   docs:
     name: Build docs
     runs-on: ubuntu-latest
     env:
-      TRAVIS_JOB_NAME: "Build documentation"
-      PYTHON_VERSION: 3.6
+      CI_JOB_TYPE: "Documentation"
     steps:
       - uses: actions/checkout@master
-      - name: "Build documentation"
+      - name: "Build CI image ${{ matrix.python-version }}"
+        run: ./scripts/ci/ci_prepare_image_on_ci.sh
+      - name: "Build docs"
         run: ./scripts/ci/ci_docs.sh
 
-  tests-p36-postgres-integrations:
-    name: "Tests [Postgres9.6][Py3.6][integrations]"
+  build-prod-image:
+    name: "Build prod image"
     runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7]
     env:
-      TRAVIS_JOB_NAME: "Tests [Postgres9.6][Py3.6][integrations]"
-      BACKEND: postgres
-      PYTHON_VERSION: 3.6
-      POSTGRES_VERSION: 9.6
-      ENABLED_INTEGRATIONS: "cassandra kerberos mongo openldap rabbitmq redis"
-      RUN_INTEGRATION_TESTS: all
+      PYTHON_MAJOR_MINOR_VERSION: ${{ matrix.python-version }}
+      CI_JOB_TYPE: "Prod image"
     steps:
       - uses: actions/checkout@master
-      - name: free disk space
-        run: |
-          sudo swapoff -a
-          sudo rm -f /swapfile
-          sudo apt clean
-          docker rmi $(docker image ls -aq)
-          df -h
-      - name: "Tests [Postgres9.6][Py3.6][integrations]"
-        run: ./scripts/ci/ci_run_airflow_testing.sh
+      - name: "Build PROD image ${{ matrix.python-version }}"
+        run: ./scripts/ci/ci_build_production_images.sh
 
-  tests-p36-postgres-providers:
-    name: "Tests [Postgres10][Py3.6][providers]"
+  prepare-backport-packages:
+    name: "Backport packages"
     runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
     env:
-      TRAVIS_JOB_NAME: "Tests [Postgres10][Py3.6][providers]"
-      BACKEND: postgres
-      POSTGRES_VERSION: 10
-      PYTHON_VERSION: 3.6
+      INSTALL_AIRFLOW_VERSION: "1.10.10"
+      CI_JOB_TYPE: "Prepare & test packages"
     steps:
       - uses: actions/checkout@master
-      - name: "Tests [Postgres10][Py3.6][providers]"
-        run: ./scripts/ci/ci_run_airflow_testing.sh tests/providers
+      - uses: actions/setup-python@v1
+        with:
+          python-version: '3.x'
+      - name: "Prepare & test backport packages"
+        run: |
+          python -m pip install bowler sdist wheel
+          ./scripts/ci/ci_prepare_and_test_backport_packages.sh
 
-  tests-p36-postgres-core:
-    name: "Tests [Postgres9.6][Py3.6][core]"
+  pyfiles:
+    name: "Count changed python files"
     runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
-    env:
-      TRAVIS_JOB_NAME: "Tests [Postgres9.6][Py3.6][core]"
-      BACKEND: postgres
-      POSTGRES_VERSION: 9.6
-      PYTHON_VERSION: 3.6
+    outputs:
+      count: ${{ steps.pyfiles.outputs.count }}
     steps:
       - uses: actions/checkout@master
-      - name: "Tests [Postgres9.6][Py3.6][core]"
-        run: ./scripts/ci/ci_run_airflow_testing.sh --ignore=tests/providers
-
+      - name: "Get count of changed python files"
+        run: |
+          set +e
+          ./scripts/ci/ci_count_changed_files.sh ${GITHUB_SHA} '\.py$'
+          echo "::set-output name=count::$?"
+        id: pyfiles
 
-  tests-p37-sqlite-integrations:
-    name: "Tests [Sqlite][3.7][integrations]"
+  tests-postgres:
+    name: "Tests: Pg${{ matrix.postgres-version  }}, Py{{ 
matrix.python-version}}"
     runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
+    needs: [static-checks-1, static-checks-2, pyfiles]
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7]
+        postgres-version: [9.6, 10]
+      fail-fast: false
     env:
-      TRAVIS_JOB_NAME: "Tests [Sqlite][3.7][integrations]"
-      BACKEND: sqlite
-      PYTHON_VERSION: 3.7
-      ENABLED_INTEGRATIONS: "cassandra kerberos mongo openldap rabbitmq redis"
-      RUN_INTEGRATION_TESTS: all
+      BACKEND: postgres
+      PYTHON_MAJOR_MINOR_VERSION: ${{ matrix.python-version }}
+      POSTGRES_VERSION: ${{ matrix.postgres-version }}
+      RUN_TESTS: "true"
+      CI_JOB_TYPE: "Tests"
+    # For pull requests only run tests when python files changed
+    if: needs.pyfiles.outputs.count != '0' || github.event_name != 
'pull_request'
     steps:
       - uses: actions/checkout@master
-      - name: free disk space
-        run: |
-          sudo swapoff -a
-          sudo rm -f /swapfile
-          sudo apt clean
-          docker rmi $(docker image ls -aq)
-          df -h
-      - name: "Tests [Sqlite][3.7][integrations]"
+      - uses: actions/setup-python@v1
+        with:
+          python-version: '3.x'
+      - name: "Free space"
+        run: ./scripts/ci/ci_free_space_on_ci.sh
+      - name: "Build CI image ${{ matrix.python-version }}"
+        run: ./scripts/ci/ci_prepare_image_on_ci.sh
+      - name: "Tests"
         run: ./scripts/ci/ci_run_airflow_testing.sh
 
-  tests-p36-sqlite:
-    name: "Tests [Sqlite][Py3.6]"
+  tests-mysql:
+    name: "Tests: MySQL${{ matrix.mysql-version  }}, Py{{ 
matrix.python-version}}"
     runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
+    needs: [static-checks-1, static-checks-2, pyfiles]
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7]
+        mysql-version: [5.7]
+      fail-fast: false
     env:
-      TRAVIS_JOB_NAME: "Tests [Sqlite][Py3.6]"
-      BACKEND: sqlite
-      PYTHON_VERSION: 3.6
+      BACKEND: mysql
+      PYTHON_MAJOR_MINOR_VERSION: ${{ matrix.python-version }}
+      MYSQL_VERSION: ${{ matrix.mysql-version }}
+      RUN_TESTS: "true"
+      CI_JOB_TYPE: "Tests"
+    # For pull requests only run tests when python files changed
+    if: needs.pyfiles.outputs.count != '0' || github.event_name != 
'pull_request'
     steps:
       - uses: actions/checkout@master
-      - name: "Tests [Sqlite][Py3.6]"
+      - uses: actions/setup-python@v1
+        with:
+          python-version: '3.x'
+      - name: "Free space"
+        run: ./scripts/ci/ci_free_space_on_ci.sh
+      - name: "Build CI image ${{ matrix.python-version }}"
+        run: ./scripts/ci/ci_prepare_image_on_ci.sh
+      - name: "Tests"
         run: ./scripts/ci/ci_run_airflow_testing.sh
 
-  tests-p36-mysql-integrations:
-    name: "Tests [MySQL][Py3.6][integrations]"
+  tests-sqlite:
+    name: "Tests: Sqlite Py{{ matrix.python-version}}"
     runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
+    needs: [static-checks-1, static-checks-2, pyfiles]
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7]
+      fail-fast: false
     env:
-      TRAVIS_JOB_NAME: "Tests [MySQL][Py3.6][integrations]"
       BACKEND: sqlite
-      PYTHON_VERSION: 3.6
-      MYSQL_VERSION: 5.7
-      ENABLED_INTEGRATIONS: "cassandra kerberos mongo openldap rabbitmq redis"
-      RUN_INTEGRATION_TESTS: all
+      PYTHON_MAJOR_MINOR_VERSION: ${{ matrix.python-version }}
+      RUN_TESTS: "true"
+      CI_JOB_TYPE: "Tests"
+    # For pull requests only run tests when python files changed
+    if: needs.pyfiles.outputs.count != '0' || github.event_name != 
'pull_request'
     steps:
       - uses: actions/checkout@master
-      - name: free disk space
-        run: |
-          sudo swapoff -a
-          sudo rm -f /swapfile
-          sudo apt clean
-          docker rmi $(docker image ls -aq)
-          df -h
-      - name: "Tests [MySQL][Py3.6][integrations]"
+      - uses: actions/setup-python@v1
+        with:
+          python-version: '3.x'
+      - name: "Free space"
+        run: ./scripts/ci/ci_free_space_on_ci.sh
+      - name: "Build CI image ${{ matrix.python-version }}"
+        run: ./scripts/ci/ci_prepare_image_on_ci.sh
+      - name: "Tests"
         run: ./scripts/ci/ci_run_airflow_testing.sh
 
-  tests-p36-mysql-providers:
-    name: "Tests [MySQL5.7][Py3.7][providers][kerberos]"
-    runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
-    env:
-      TRAVIS_JOB_NAME: "Tests [MySQL5.7][Py3.7][providers][kerberos]"
-      BACKEND: mysql
-      PYTHON_VERSION: 3.7
-      MYSQL_VERSION: 5.7
-      ENABLED_INTEGRATIONS: "kerberos"
-    steps:
-      - uses: actions/checkout@master
-      - name: "Tests [MySQL5.7][Py3.7][providers][kerberos]"
-        run: ./scripts/ci/ci_run_airflow_testing.sh tests/providers
-
-  tests-p37-mysql-kerberos:
-    name: "Tests [MySQL5.7][Py3.7][core][kerberos]"
-    runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
-    env:
-      TRAVIS_JOB_NAME: "Tests [MySQL5.7][Py3.7][core][kerberos]"
-      BACKEND: mysql
-      PYTHON_VERSION: 3.7
-      MYSQL_VERSION: 5.7
-      ENABLED_INTEGRATIONS: "kerberos"
-    steps:
-      - uses: actions/checkout@master
-      - name: free disk space
-        run: |
-          sudo swapoff -a
-          sudo rm -f /swapfile
-          sudo apt clean
-          docker rmi $(docker image ls -aq)
-          df -h
-      - name: "Tests [MySQL5.7][Py3.7][core][kerberos]"
-        run: ./scripts/ci/ci_run_airflow_testing.sh --ignore=tests/providers
-
   requirements:
-    name: "Generate requirements"
+    name: "Requirements: Py ${{ matrix.python-version}} "
     runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
     strategy:
       matrix:
         python-version: [3.6, 3.7]
+    env:
+      PYTHON_MAJOR_MINOR_VERSION: ${{ matrix.python-version }}
+      SHOW_GENERATE_REQUIREMENTS_INSTRUCTIONS: true
+      CI_JOB_TYPE: "Requirements"
     steps:
       - uses: actions/checkout@master
       - uses: actions/setup-python@v1
+      - name: "Build CI image ${{ matrix.python-version }}"
+        run: ./scripts/ci/ci_prepare_image_on_ci.sh
       - name: "Generate requirements"
-        env:
-          PYTHON_MAJOR_MINOR_VERSION: ${{ matrix.python-version }}
-          SHOW_GENERATE_REQUIREMENTS_INSTRUCTIONS: true
         run: ./scripts/ci/ci_generate_requirements.sh
 
-  build-image:
-    name: "Build production image"
+  push-images-to-github-cache:
+    name: "Build and push images to github registry"
     runs-on: ubuntu-latest
-    needs: [statics, statics-tests]
+    needs:
+      - tests-sqlite
+      - tests-postgres
+      - tests-mysql
+      - requirements
+      - prepare-backport-packages
+      - build-prod-image
+      - docs

Review comment:
       Yes. unfortunately we cannot do one CI image build and store it in the 
registry. When you run pull requests from the forks, the GITHUB_TOKEN has only 
read permissions and you are not able to push image to Github Image Registry 
:(. And when you think about it, it makes perfect sense (Imagine someone 
changing the build and overriding all temporary images). However I believe 
(still need to verify it) that we can pull the images from the Github Registy 
rather than from the DockerHub and it should significantly speed up Pullng the 
images for rebuilds (it takes 3-4 minutes now). I yet have to confirm it.




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