Update workflow to test for multiple python versions.

.github/workflows/build-docs.yml

@@ -1,12 +1,13 @@
 name: Build docs
 on:
-  push:
-    branches: [main]
-  pull_request:
-    branches: [main]
+  workflow_call:
+    inputs:
+      python-version:
+        required: true
+        type: string
 
 jobs:
-  build:
+  build-docs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
@@ -16,6 +17,7 @@ jobs:
           environment-file: ./environment-dev.yml
           init-shell: bash
           create-args: --verbose
+            python=${{ inputs.python-version }}
           cache-environment: true
           cache-downloads: false
 

.github/workflows/build-ultraplot.yml

@@ -1,12 +1,14 @@
 name: Build and Test
 on:
-  push:
-    branches: [main]
-  pull_request:
-    branches: [main]
+  workflow_call:
+    inputs:
+      python-version:
+        required: true
+        type: string
 
 jobs:
-  build:
+  build-ultraplot:
+    name: Test Python ${{ inputs.python-version }}
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
@@ -15,7 +17,9 @@ jobs:
         with:
           environment-file: ./environment-dev.yml
           init-shell: bash
-          create-args: --verbose
+          create-args: >-
+            --verbose
+            python=${{ inputs.python-version }}
           cache-environment: true
           cache-downloads: false
 

.github/workflows/linter.yml

@@ -6,7 +6,7 @@ on:
     branches: [main]
 
 jobs:
-  build:
+  linter:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:

.github/workflows/main.yml

@@ -0,0 +1,68 @@
+name: Matrix Test
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  get-python-versions:
+    runs-on: ubuntu-latest
+    outputs:
+      python-versions: ${{ steps.set-versions.outputs.python-versions }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: pip install tomli
+
+      - id: set-versions
+        run: |
+          # Save the Python script to a file
+          cat > get_versions.py << 'EOF'
+          import tomli
+          import re
+          import json
+
+          with open("pyproject.toml", "rb") as f:
+              data = tomli.load(f)
+          python_req = data["project"]["requires-python"]
+          min_version = re.search(r">=(\d+\.\d+)", python_req)
+          max_version = re.search(r"<(\d+\.\d+)", python_req)
+
+          versions = []
+          if min_version and max_version:
+              min_v = tuple(map(int, min_version.group(1).split(".")))
+              max_v = tuple(map(int, max_version.group(1).split(".")))
+              current = min_v
+              while current < max_v:
+                  versions.append(".".join(map(str, current)))
+                  current = (current[0], current[1] + 1)
+
+          print(json.dumps(versions))
+          EOF
+
+          # Run the Python script and capture output
+          VERSIONS=$(python3 get_versions.py)
+          echo "python-versions=${VERSIONS}" >> $GITHUB_OUTPUT
+
+  build-test:
+    needs: get-python-versions
+    strategy:
+      matrix:
+        python-version: ${{ fromJson(needs.get-python-versions.outputs.python-versions) }}
+    uses: ./.github/workflows/build-ultraplot.yml
+    with:
+      python-version: ${{ matrix.python-version }}
+
+  build-docs:
+    needs: get-python-versions
+    strategy:
+      matrix:
+        python-version: ${{ fromJson(needs.get-python-versions.outputs.python-versions) }}
+    uses: ./.github/workflows/build-docs.yml
+    with:
+      python-version: ${{ matrix.python-version }}