Overhaul the build system to be per modern conventions

.github/workflows/continuous_integration.yml

@@ -29,27 +29,26 @@ jobs:
         python-version: ["3.9", "3.10", "3.11"]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
+    - name: Install build prerequisites
       run: |
-        python -m pip install --upgrade pip
-        python -m pip install tox tox-gh-actions
-        wget https://github.com/protocolbuffers/protobuf/releases/download/v21.6/protoc-21.6-linux-x86_64.zip
-        unzip protoc-21.6-linux-x86_64.zip
-        sudo cp bin/protoc /usr/bin/protoc && sudo chmod 777 /usr/bin/protoc
-        sudo cp -r include/. /usr/include && sudo chmod -R +r /usr/include/google
-        protoc --version
+        python -m pip install --upgrade build pip
         sudo apt-get install -y libusb-1.0-0-dev libprotobuf-dev swig libevent-dev
-    - name: Build protobufs
-      run: python setup.py build_proto
+    - name: Setup protoc
+      uses: arduino/setup-protoc@v3
+    - name: Create OpenHTF package
+      run: |
+        python -m build
     - name: Test with tox
-      run: tox
+      run: |
+        python -m pip install tox tox-gh-actions
+        tox
     - name: Publish to Coveralls with GitHub Action
-      uses: coverallsapp/github-action@v2.3.0
+      uses: coverallsapp/github-action@v2
       with:
         parallel: true
         flag-name: python-${{ matrix.python-version }}
@@ -60,8 +59,8 @@ jobs:
       run:
         working-directory: openhtf/output/web_gui
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
       - run: npm install
       - run: npm run build
 

CONTRIBUTING.md

@@ -231,11 +231,15 @@ virtualenv venv
 # Activate the new virtualenv.
 . venv/bin/activate
 
-# Update setuptools.
-pip install setuptools --upgrade
+# Update build (run setuptools).
+pip install build --upgrade
 
 # Install openhtf into the virtualenv in dev mode.
-python setup.py develop
+pip install --editable .
+
+# Install tox and run unit tests.
+pip install tox
+tox
 ```
 
 ### MacOS
@@ -268,7 +272,7 @@ virtualenv venv
 . venv/bin/activate
 
 # Install openhtf into the virtualenv in dev mode.
-python setup.py develop
+pip install --editable .
 ```
 
 If you're having issues with the python setup, it's possible that the problem is due to El Capitan not including ssl headers. This [link](http://adarsh.io/bundler-failing-on-el-capitan/) may help you in that regard. 
@@ -318,12 +322,8 @@ npm start
 ```
 
 Now you've got the frontend building, but you still need to serve it. The
-frontend server is started as a runnable module. In a terminal where your Python
-virtual environment (set up above) is active, start the server with:
-
-```bash
-python -m openhtf.output.web_gui
-```
+frontend server is started as a runnable module. See the associated
+[readme](openhtf/output/web_gui/README.md).
 
 If you want the server to automatically restart when changes are detected, use
 the `--dev` flag.

MANIFEST.in

@@ -0,0 +1,2 @@
+include openhtf/output/proto/*.proto
+

pyproject.toml

@@ -1,3 +1,53 @@
 [build-system]
-requires = ["setuptools>=40.8.0", "wheel>=0.29.0"]
+requires = ["setuptools", "setuptools-protobuf"]
 build-backend = "setuptools.build_meta"
+
+[project]
+name = "openhtf"
+version = "1.6.0"
+authors = [
+  { name="The OpenHTF Authors"},
+]
+description = "OpenHTF, the open hardware testing framework."
+readme = "README.md"
+requires-python = ">=3.9"
+dependencies = [
+    "attrs>=19.3.0",
+    "colorama>=0.4.6",
+    "contextlib2>=21.6.0",
+    "inflection>=0.5.1",
+    "google-auth>=1.34.0",
+    "mutablerecords>=0.4.1",
+    "protobuf>=5.28.2",
+    "PyYAML>=6.0.2",
+    "pyOpenSSL>=17.1.0",
+    "requests>=2.27.1",
+    "sockjs_tornado>=1.0.7",
+    "tornado>=4.3,<5.0",
+    "typing_extensions>=4.12.2",
+]
+license = {file = "LICENSE"}
+
+[project.optional-dependencies]
+usb_plugs = [
+    "libusb1>=3.1.0",
+    "M2Crypto>=0.42.0",
+]
+update_units = ["xlrd>=1.0.0"]
+serial_collection_plug = ["pyserial>=3.5"]
+examples = ["pandas>=2.2.3"]
+
+[project.urls]
+Homepage = "https://github.com/google/openhtf"
+
+[tool.setuptools.packages]
+find = {}
+
+[tool.setuptools-protobuf]
+protobufs = [
+    "openhtf/output/proto/assembly_event.proto",
+    "openhtf/output/proto/guzzle.proto",
+    "openhtf/output/proto/mfg_event.proto",
+    "openhtf/output/proto/test_runs.proto",
+]
+

tox.ini

@@ -9,7 +9,6 @@ python =
 
 [testenv]
 deps =
-    -r{toxinidir}/test_reqs.txt
     absl-py>=0.10.0
     pandas>=0.22.0
     numpy