Drop Python 3.8 support

.github/workflows/autofix.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Run pycln
       run: mapfile -t files < filelist.txt && python3 -m pycln --all --disable-all-dunder-policy -- "${files[@]}"
     - name: Run pyupgrade
-      run: mapfile -t files < filelist.txt && python3 -m pyupgrade --keep-runtime-typing --py38-plus --exit-zero-even-if-changed -- "${files[@]}"
+      run: mapfile -t files < filelist.txt && python3 -m pyupgrade --keep-runtime-typing --py39-plus --exit-zero-even-if-changed -- "${files[@]}"
     - name: Run black
       run: mapfile -t files < filelist.txt && python3 -m black -- "${files[@]}"
     - name: Run isort

.github/workflows/check.yml

@@ -7,7 +7,13 @@ on:
 
 jobs:
   mypy:
+    timeout-minutes: 5
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # Mypy running on platform A can check for platform B, so it all runs on linux.
+        # Multiple parallel jobs are needed only to make this faster.
+        mypy-platform: ["linux", "win32", "darwin"]
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
@@ -17,23 +23,16 @@ jobs:
     - run: pip install wheel
     - run: pip install -r requirements-dev.txt
     - run: |
-        time mypy --platform linux --python-version 3.8 porcupine docs/extensions.py
-        time mypy --platform linux --python-version 3.9 porcupine docs/extensions.py
-        time mypy --platform linux --python-version 3.10 porcupine docs/extensions.py
-        time mypy --platform win32 --python-version 3.8 porcupine docs/extensions.py
-        time mypy --platform win32 --python-version 3.9 porcupine docs/extensions.py
-        time mypy --platform win32 --python-version 3.10 porcupine docs/extensions.py
-        time mypy --platform darwin --python-version 3.8 porcupine docs/extensions.py
-        time mypy --platform darwin --python-version 3.9 porcupine docs/extensions.py
-        time mypy --platform darwin --python-version 3.10 porcupine docs/extensions.py
-        time mypy --platform darwin --python-version 3.11 porcupine docs/extensions.py
+        time mypy --platform ${{ matrix.mypy-platform }} --python-version 3.9 porcupine docs/extensions.py
+        time mypy --platform ${{ matrix.mypy-platform }} --python-version 3.10 porcupine docs/extensions.py
+        time mypy --platform ${{ matrix.mypy-platform }} --python-version 3.11 porcupine docs/extensions.py
 
   pytest-windows:
     timeout-minutes: 10
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
@@ -53,7 +52,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
@@ -73,17 +72,15 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
     env:
       # TODO: how to install tkdnd on mac? add instructions to README or make mac app that bundles it
       TCLLIBPATH: ./lib
       PYTHON: /usr/local/opt/python@${{ matrix.python-version }}/libexec/bin/python
     steps:
     - uses: actions/checkout@v4
     - run: brew install python@${{ matrix.python-version }}
-    # https://stackoverflow.com/a/66919851
-    - if: matrix.python-version != '3.8'
-      run: brew install python-tk@${{ matrix.python-version }}
+    - run: brew install python-tk@${{ matrix.python-version }}
     - run: $PYTHON --version
     - run: $PYTHON -m pip install -r requirements-dev.txt
     - run: $PYTHON scripts/download-tkdnd.py

.github/workflows/release-builds.yml

@@ -11,7 +11,9 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
       with:
-        python-version: "3.8"  # last version supporting windows 7
+        # This should be the oldest python version we support, so it is
+        # backwards-compatible for older windows versions.
+        python-version: "3.9"  
         cache: pip
     - run: pip install wheel
     - run: pip install -r requirements-dev.txt

CONTRIBUTING.md

@@ -24,7 +24,7 @@ I have tried to make contributing easy:
     Just make a PR and I will edit it as needed.
 
 To get started, make a fork of Porcupine with the button in the top right corner of this page.
-Then install Python 3.8 or newer and [git](https://git-scm.com/), and run these commands:
+Then install Python 3.9 or newer and [git](https://git-scm.com/), and run these commands:
 
     git clone https://github.com/YourUserName/porcupine
     cd porcupine

README.md

@@ -73,7 +73,7 @@ and then deleting `porcupine-venv`.
 <details>
 <summary>Other Linux distributions</summary>
 
-Install Python 3.8 or newer with pip and tkinter somehow.
+Install Python 3.9 or newer with pip and tkinter somehow.
 If you want drag and drop support, also install tkdnd for the Tcl interpreter that tkinter uses.
 Then run these commands: