add github actions

.github/workflows/black.yaml

@@ -0,0 +1,19 @@
+name: Python Black
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    name: Python Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.10' 
+      - name: Setup checkout
+        uses: actions/checkout@master
+      - name: Lint with Black
+        run: |
+          pip install black
+          black funlib/show/neuroglancer --diff --check

.github/workflows/publish.yaml

@@ -0,0 +1,34 @@
+name: Publish
+
+on:
+  push:
+    tags: ["*"]
+
+jobs:
+  build-n-publish:
+    name: Build and publish Python 🐍 distributions 📦 to PyPI and TestPyPI
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v3
+        with:
+          python-version: "3.10"
+      - name: Install pypa/build
+        run: >-
+          python -m
+          pip install
+          build
+          --user
+      - name: Build a binary wheel and a source tarball
+        run: >-
+          python -m
+          build
+          --sdist
+          --wheel
+          --outdir dist/
+      - name: Publish distribution 📦 to PyPI
+        if: startsWith(github.ref, 'refs/tags')
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          password: ${{ secrets.PYPI_API_TOKEN }}

funlib/show/neuroglancer/add_layer.py

@@ -77,6 +77,7 @@ def guess_shader_code(array: Array):
             - 4 channels -> projected RGB (PCA? Random linear combinations? Randomizable with "l" key?)
         - multiple channel dimensions?:
     """
+    raise NotImplementedError()
     channel_dim_shapes = [
         array.shape[i]
         for i in range(len(array.axis_names))