pipeline / pipenv: explicitly specify python version to workaround pipenv picking highest available

based on:
https://github.com/fphammerle/ical2vdir/pull/10/commits/16cd96154ff5e1063d90b4e61e96f710e657ad7e
https://github.com/fphammerle/ical2vdir/pull/12/commits/941136683b3cb3e554cd3c5ebd45b51ad7ec9c77
https://github.com/fphammerle/ical2vdir/pull/10/commits/abbb7e0cd1f47dd131f86ae7c18db92fbf1318ae#diff-a94bb3934ab4168e4eeb128c21842465R1
https://github.com/fphammerle/ical2vdir/pull/11/commits/72132904fc97898a71ec2ce1690f8331caf71e27
https://github.com/fphammerle/ical2vdir/pull/11/commits/74aebe8bfb619d2360e0ce63334ffbc289fa15c0
https://github.com/fphammerle/ical2vdir/pull/10/commits/4ad3fe2611df5c354ccb196b4c13f2a9e6a9450c
https://github.com/fphammerle/ical2vdir/pull/10/commits/b421f9a51e45f266dd0c33e468ff7020dfb0c983
https://github.com/fphammerle/switchbot-mqtt/pull/7/commits/3b5ea00bf0562dab09ae0900028abc4117fca5de
https://github.com/fphammerle/switchbot-mqtt/pull/7/commits/d222cbe64e1f4e632874066e1c26636ada8c023e
https://github.com/fphammerle/switchbot-mqtt/pull/7/commits/ce964ae335bad0b50c51aedfdd65daba58aacfa0

reported here:
https://github.com/fphammerle/ical2vdir/issues/9
https://github.com/WanzenBug/pylint-import-requirements/issues/18#issuecomment-645622504

.github/workflows/python.yml

@@ -1,5 +1,7 @@
 # sync with https://github.com/fphammerle/ical2vdir/blob/master/.github/workflows/python.yml
 
+# https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions
+
 # shown in badge
 # https://help.github.com/en/actions/automating-your-workflow-with-github-actions/configuring-a-workflow#adding-a-workflow-status-badge-to-your-repository
 name: tests
@@ -11,7 +13,26 @@ on:
   - cron: '0 20 * * 5'
 
 jobs:
-  build:
+  code-format:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        python-version:
+        - 3.8
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - run: pip install --upgrade pipenv>=2018.10.9
+    # TODO exclude dbus-python from pipenv install
+    - run: sudo apt-get install --yes --no-install-recommends libdbus-1-dev
+    - run: pipenv install --python "$PYTHON_VERSION" --deploy --dev
+      env:
+        PYTHON_VERSION: ${{ matrix.python-version }}
+    - run: pipenv graph
+    - run: pipenv run black --check .
+  tests:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
@@ -27,20 +48,15 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - run: pip install --upgrade pipenv>=2018.10.9
     - run: sudo apt-get install --yes --no-install-recommends libdbus-1-dev
-    - run: pipenv install --deploy --dev
-    # ModuleNotFoundError: No module named 'importlib_metadata'
-    # https://github.com/WanzenBug/pylint-import-requirements/issues/17
-    - run: if python3 -c 'import sys; sys.exit(sys.version_info < (3, 8))'; then
-           pipenv graph;
-           pipenv install --dev importlib-metadata;
-           fi
+    - run: pipenv install --python "$PYTHON_VERSION" --deploy --dev
+      env:
+        PYTHON_VERSION: ${{ matrix.python-version }}
     - run: pipenv graph
+    - run: pipenv run pytest --cov=systemctl_mqtt --cov-report=term-missing --cov-fail-under=100
     - run: pipenv run pylint --load-plugins=pylint_import_requirements systemctl_mqtt
     # https://github.com/PyCQA/pylint/issues/352
     - run: pipenv run pylint tests/*
     - run: pipenv run mypy systemctl_mqtt tests
-    - run: pipenv run pytest --cov=systemctl_mqtt --cov-report=term-missing --cov-fail-under=100
-    - run: pipenv run black --check .
     # >=1.9.0 to detect branch name
     # https://github.com/coveralls-clients/coveralls-python/pull/207
     # https://github.com/coverallsapp/github-action/issues/4#issuecomment-547036866

.gitignore

@@ -2,3 +2,4 @@
 .mypy_cache/
 build/
 dist/
+tags

Pipfile

@@ -7,12 +7,26 @@ name = "pypi"
 systemctl-mqtt = {editable = true,path = "."}
 
 [dev-packages]
-black = "==19.10b0"
+# black requires python>=3.6
+# https://github.com/psf/black/commit/e74117f172e29e8a980e2c9de929ad50d3769150#diff-2eeaed663bd0d25b7e608891384b7298R51
+black = {version = "==19.10b0", markers = "python_version >= '3.6'"}
 mypy = "*"
 pylint = "*"
 pylint-import-requirements = "*"
 pytest = "*"
 pytest-cov = "*"
 
+# python3.5 compatibility
+# https://github.com/jaraco/zipp/commit/05a3c52b4d41690e0471a2e283cffb500dc0329a
+zipp = "<2"
+# workaround https://github.com/pytest-dev/pytest/issues/3953
+pathlib2 = {version = "*", markers="python_version < '3.6'"}
+
+# python3.8 compatibility
+# workaround https://github.com/WanzenBug/pylint-import-requirements/issues/17
+importlib-metadata = "*"
+# workaround pipenv unexpectedly adding marker "python_version < '3.8'"
+typed-ast = "*"
+
 [requires]
 python_version = "3"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "0574fc521848e7aecd1bb8fb168855acbaa1705f4993c34ef5a2eda759d41d68"
+            "sha256": "57f72dc7c2b137c416cb0486c2752a3f1261c1d5893b94d875757bc058b511f8"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -61,6 +61,7 @@
                 "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"
             ],
             "index": "pypi",
+            "markers": "python_version >= '3.6'",
             "version": "==19.10b0"
         },
         "click": {
@@ -111,7 +112,7 @@
                 "sha256:0505dd08068cfec00f53a74a0ad927676d7757da81b7436a6eefe4c7cf75c545",
                 "sha256:15ec6c0fd909e893e3a08b3a7c76ecb149122fb14b7efe1199ddd4c7c57ea958"
             ],
-            "markers": "python_version < '3.8'",
+            "index": "pypi",
             "version": "==1.6.1"
         },
         "isort": {
@@ -195,6 +196,15 @@
             ],
             "version": "==20.4"
         },
+        "pathlib2": {
+            "hashes": [
+                "sha256:0ec8205a157c80d7acc301c0b18fbd5d44fe655968f5d947b6ecef5290fc35db",
+                "sha256:6cd9a47b597b37cc57de1c05e56fb1a1c9cc9fab04fe78c29acd090418529868"
+            ],
+            "index": "pypi",
+            "markers": "python_version < '3.6'",
+            "version": "==2.3.5"
+        },
         "pathspec": {
             "hashes": [
                 "sha256:7d91249d21749788d07a2d0f94147accd8f845507400749ea19c1ec9054a12b0",
@@ -211,10 +221,10 @@
         },
         "py": {
             "hashes": [
-                "sha256:5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa",
-                "sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0"
+                "sha256:a673fa23d7000440cc885c17dbd34fafcb7d7a6e230b29f6766400de36a33c44",
+                "sha256:f3b3a4c36512a4c4f024041ab51866f11761cc169670204b235f6b20523d4e6b"
             ],
-            "version": "==1.8.1"
+            "version": "==1.8.2"
         },
         "pylint": {
             "hashes": [
@@ -319,7 +329,7 @@
                 "sha256:fc0fea399acb12edbf8a628ba8d2312f583bdbdb3335635db062fa98cf71fca4",
                 "sha256:fe460b922ec15dd205595c9b5b99e2f056fd98ae8f9f56b888e7a17dc2b757e7"
             ],
-            "markers": "implementation_name == 'cpython' and python_version < '3.8'",
+            "index": "pypi",
             "version": "==1.4.1"
         },
         "typing-extensions": {
@@ -345,10 +355,11 @@
         },
         "zipp": {
             "hashes": [
-                "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b",
-                "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"
+                "sha256:c70410551488251b0fee67b460fb9a536af8d6f9f008ad10ac51f615b6a521b1",
+                "sha256:e0d9e63797e483a30d27e09fffd308c59a700d365ec34e93cc100844168bf921"
             ],
-            "version": "==3.1.0"
+            "index": "pypi",
+            "version": "==1.2.0"
         }
     }
 }