Drop support for Python < 3.7

Includes:
- pinning images and package dependencies in CircleCI
- removing stale `master` branch
- dropping pylons framework test
- updating versioning documentation
- drop Python < 3.7 as supported on setup.py
- removing pylons/boto from CI suitespec
- release note for 2.0

.circleci/config.templ.yml

@@ -449,12 +449,12 @@ jobs:
       - run_test:
           pattern: 'vendor'
 
-  boto:
+  botocore:
     <<: *machine_executor
     parallelism: 6
     steps:
       - run_test:
-          pattern: '^boto'  # run boto and botocore
+          pattern: 'botocore'
           snapshot: true
           docker_services: "localstack"
 
@@ -493,16 +493,6 @@ jobs:
           snapshot: true
           docker_services: 'postgres'
 
-  pylons:
-    <<: *contrib_job_small
-    docker:
-      - image: *ddtrace_dev_image
-      - *testagent
-    steps:
-      - run_test:
-          pattern: 'pylons'
-          trace_agent_url: "http://localhost:8126"
-
   aiohttp:
     <<: *machine_executor
     parallelism: 3

.circleci/config.yml

@@ -38,4 +38,4 @@ jobs:
 workflows:
   setup:
     jobs:
-      - setup
+      - setup

.github/workflows/build_deploy.yml

@@ -24,68 +24,6 @@ on:
     - cron:  0 2 * * 2-6
 
 jobs:
-  build_wheels_py27_35:
-    name: Build and test wheels on ${{ matrix.os }} (${{ matrix.archs }})
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        include:
-         - os: ubuntu-latest
-           archs: x86_64 i686
-         - os: ubuntu-latest
-           archs: aarch64
-         - os: windows-latest
-           archs: AMD64 x86
-         - os: macos-latest
-           # universal2 and arm64 builds require CPython 3.8 or newer:
-           # https://cibuildwheel.readthedocs.io/en/stable/faq/#universal2
-           archs: x86_64 universal2
-    steps:
-      - uses: actions/checkout@v3
-        # Include all history and tags
-        with:
-          fetch-depth: 0
-
-      - uses: actions/setup-python@v4
-        name: Install Python
-        with:
-          python-version: '3.8'
-
-      - name: Set up QEMU
-        if: runner.os == 'Linux'
-        uses: docker/setup-qemu-action@v2
-        with:
-          platforms: all
-
-      - name: Build wheels python 2.7 and 3.5
-        uses: joerick/cibuildwheel@v1.12.0
-        env:
-          # configure cibuildwheel to build native archs ('auto'), and some
-          # emulated ones
-          CIBW_ARCHS: ${{ matrix.archs }}
-          # PyPY is not supported
-          # Windows 2.7 wheels no longer can be built https://github.com/DataDog/dd-trace-py/pull/2344
-          CIBW_SKIP: cp27-win*
-          CIBW_BUILD: cp27* cp35*
-          # Run a smoke test on every supported platform
-          CIBW_TEST_COMMAND: python {project}/tests/smoke_test.py
-          # Testing arm on MacOS is currently not supported by Github
-          CIBW_TEST_SKIP: "*-macosx_universal2:arm64"
-          # Workaround for Macos 11.0 versioning issue, a.k.a.
-          # `platform.mac_ver()` reports incorrect MacOS version at 11.0
-          # See: https://stackoverflow.com/a/65402241
-          CIBW_ENVIRONMENT_MACOS: SYSTEM_VERSION_COMPAT=0
-          CMAKE_BUILD_PARALLEL_LEVEL: 12
-
-      - uses: actions/upload-artifact@v3
-        with:
-          path: ./wheelhouse/*.whl
-
-  build_wheels_py36:
-    uses: ./.github/workflows/build_python_3.yml
-    with:
-      cibw_build: 'cp36*'
-
   build_wheels_py37:
     uses: ./.github/workflows/build_python_3.yml
     with:
@@ -171,7 +109,6 @@ jobs:
 
   upload_pypi:
     needs:
-      - build_wheels_py27_35
       - build_wheels_py36
       - build_wheels_py37
       - build_wheels_py38

.github/workflows/changelog.yml

@@ -2,7 +2,6 @@ name: Changelog
 on:
   push:
     branches:
-      - master
       - 0.x
       - 1.x
   pull_request:

.github/workflows/codeql-analysis.yml

@@ -3,13 +3,11 @@ name: "CodeQL"
 on:
   push:
     branches:
-      - master
       - 0.x
       - 1.x
   pull_request:
     # The branches below must be a subset of the branches above
     branches:
-      - master
       - 0.x
       - 1.x
 

.github/workflows/requirements-locks.yml

@@ -20,7 +20,7 @@ jobs:
         run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
 
       - name: Set python interpreters
-        run: pyenv global 3.10 2.7 3.5 3.6 3.7 3.8 3.9 3.11
+        run: pyenv global 3.10 3.7 3.8 3.9 3.11
 
       - name: Install Dependencies
         run: pip install --upgrade pip && pip install riot

.github/workflows/test_frameworks.yml

@@ -3,7 +3,6 @@ name: Framework tests
 on:
   push:
     branches:
-      - master
       - 0.x
       - 1.x
   pull_request:
@@ -528,52 +527,6 @@ jobs:
         # Disable tests checking GC references since profiling can interfere
         run: ddtrace-run python -m pytest -k 'not test_record_gc and not test_record_get and not test_record_items and not test_record_iter' tests
 
-  pylons-testsuite-1_0_3:
-    name: Pylons 1.0.3
-    runs-on: "ubuntu-20.04"
-    needs: needs-run
-    # Ubuntu 20.04 is the last version of ubuntu on github setup actions to provide Python 2.7.
-    container:
-      image: python:2.7.18-buster
-    env:
-      DD_TESTING_RAISE: true
-      PYTHONPATH: ../ddtrace/tests/debugging/exploration/
-      CMAKE_BUILD_PARALLEL_LEVEL: 12
-    defaults:
-      run:
-        working-directory: pylons
-    steps:
-      - uses: actions/checkout@v3
-        if: needs.needs-run.outputs.outcome == 'success'
-        with:
-          path: ddtrace
-      - uses: actions/checkout@v3
-        if: needs.needs-run.outputs.outcome == 'success'
-        with:
-          repository: pylons/pylons
-          ref: master
-          path: pylons
-      - name: Install ddtrace
-        if: needs.needs-run.outputs.outcome == 'success'
-        run: pip install ../ddtrace
-      - name: Install test dependencies
-        if: needs.needs-run.outputs.outcome == 'success'
-        run: pip install -e .[test]
-      - name: Pin PasteDeploy to Python 2.7 compatible version
-        if: needs.needs-run.outputs.outcome == 'success'
-        run: pip install pastedeploy==2.1.1
-      - name: MarkupSafe fix
-        if: needs.needs-run.outputs.outcome == 'success'
-        run: pip install --upgrade MarkupSafe==0.18 pip setuptools --force
-      - name: Disable failing tests
-        if: needs.needs-run.outputs.outcome == 'success'
-        run: |
-          sed -i'' "s/test_detect_lang/detect_lang/g" tests/test_units/test_basic_app.py
-          sed -i'' "s/test_langs/langs/g" tests/test_units/test_basic_app.py
-      - name: Run tests
-        if: needs.needs-run.outputs.outcome == 'success'
-        run: nosetests
-
   gunicorn-testsuite-20_1_0:
     name: gunicorn 20.1.0
     runs-on: "ubuntu-latest"

.riot/requirements/102cf0a.txt

@@ -2,32 +2,29 @@
 # This file is autogenerated by pip-compile with Python 3.7
 # by the following command:
 #
-#    pip-compile --no-annotate --resolver=backtracking .riot/requirements/102cf0a.in
+#    pip-compile --config=pyproject.toml --no-annotate --resolver=backtracking .riot/requirements/102cf0a.in
 #
 attrs==23.1.0
-coverage[toml]==7.2.3
-exceptiongroup==1.1.1
+coverage[toml]==7.2.7
+exceptiongroup==1.1.2
 gevent==1.4.0
 greenlet==0.4.14
-gunicorn[gevent]==20.1.0
+gunicorn[gevent]==21.2.0
 hypothesis==6.45.0
-importlib-metadata==6.6.0
+importlib-metadata==6.7.0
 iniconfig==2.0.0
-mock==5.0.2
+mock==5.1.0
 opentracing==2.4.0
 packaging==23.1
-pluggy==1.0.0
+pluggy==1.2.0
 py-cpuinfo==8.0.0
-pytest==7.3.1
-pytest-asyncio==0.21.0
+pytest==7.4.0
+pytest-asyncio==0.21.1
 pytest-benchmark==4.0.0
-pytest-cov==4.0.0
-pytest-mock==3.10.0
+pytest-cov==4.1.0
+pytest-mock==3.11.1
 sortedcontainers==2.4.0
 tomli==2.0.1
-typing-extensions==4.7.0
+typing-extensions==4.7.1
 uwsgi==2.0.21
 zipp==3.15.0
-
-# The following packages are considered to be unsafe in a requirements file:
-# setuptools