Add Python 3.10 support (#1271)

* Add Python 3.10 support

* Change Python 3.10 to 3.10-dev in CI

* Run poetry update

* Turn off fail-fast to troubleshoot

Co-authored-by: Jonathan Wren <jonathan@nowandwren.com>

* Add continue-on-error for 3.10

Co-authored-by: Jonathan Wren <jonathan@nowandwren.com>

* use prerelease poetry for prerelease python

* fix syntax error

* rename steps to make more sense

* remove dev dependency that breaks with python 3.10

* update tests

* Change test dependencies for minimal breakage on python 3.10

- loosen the test dep requirements (so we get warned about these
  problems sooner)
- add new extras group to provide minimal deps required for testing (we
  don't need to run static analysis again on every version)

* change how we check if deps are installed so test don't run wild

* add setuptools due to poetry bug, clean up other steps

* update lock file

* test

* Revert "test"

This reverts commit 31e538300e.

Co-authored-by: Jonathan Wren <jonathan@nowandwren.com>

.github/workflows/testing.yaml

@@ -23,9 +23,11 @@ jobs:
     if: >
       ! contains(github.event.head_commit.message, '[ci skip]')
     runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.python-version == '3.10-dev' }}
     strategy:
+      fail-fast: false
       matrix:
-        python-version: [ 3.7, 3.8, 3.9 ]
+        python-version: [ 3.7, 3.8, 3.9, 3.10-dev ]
         os: [ ubuntu-latest, macos-latest, windows-latest ]
 
     steps:
@@ -44,27 +46,50 @@ jobs:
         key: ${{ runner.os }}-${{ hashFiles('poetry.lock') }}-${{ matrix.python-version }}-v2
 
     - name: Install dependencies
+      if: ${{ matrix.python-version != '3.10-dev' }}
       run: |
+        echo '::group::poetry'
         pip install poetry
         poetry config --local virtualenvs.in-project true
+        echo '::endgroup::'
+
+        echo '::group::Other dependencies'
         poetry install --remove-untracked
+        echo '::endgroup::'
+
+        echo 'DEPS_INSTALLED=true' >> $GITHUB_ENV
+
+
+    - name: Install dependencies (Prerelease)
+      if: ${{ matrix.python-version == '3.10-dev' }}
+      run: |
+        echo '::group::poetry'
+        pip install poetry==1.2.0a1
+        poetry config --local virtualenvs.in-project true
+        echo '::endgroup::'
+
+        echo '::group::Other dependencies'
+        poetry install --remove-untracked --no-dev --extras testing
+        echo '::endgroup::'
+
+        echo 'DEPS_INSTALLED=true' >> $GITHUB_ENV
 
     - name: Code formatting (Black)
-      if: success() || failure()
+      if: ${{ matrix.python-version != '3.10-dev' && env.DEPS_INSTALLED == 'true' }}
       run: |
         poetry run black --version
         poetry run black --check --diff .
 
-    - name: Code Style (PyFlakes)
-      if: success() || failure()
+    - name: Code Style (flake8)
+      if: ${{ matrix.python-version != '3.10-dev' && env.DEPS_INSTALLED == 'true' }}
       run: |
-        poetry run pyflakes --version
-        poetry run pyflakes jrnl features tests
+        poetry run pflake8 --version
+        poetry run pflake8 jrnl features tests
 
     - name: Test with pytest
-      if: success() || failure()
+      if: ${{ env.DEPS_INSTALLED == 'true' }}
       run: poetry run pytest --junitxml=reports/pytest/results.xml
 
     - name: Test with behave
-      if: success() || failure()
+      if: ${{ env.DEPS_INSTALLED == 'true' }}
       run: poetry run behave --no-skipped --format progress2 --junit --junit-directory reports/behave