Add CI to capture version silliness

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: Continuous Test + Deploy
+
+on:
+  push:
+    branches: [main]
+    tags: ["v*.*.*"]
+  pull_request:
+    branches: [main]
+
+jobs:
+  health_check:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3
+      uses: actions/setup-python@v2
+    - name: Install FontTools
+      run: pip install fonttools pytest
+    - name: pytest
+      run: pytest

tests/basic_test.py

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+from fontTools import ttLib
+from pathlib import Path
+import pytest
+import re
+
+def test_consistent_version():
+    fonts_dir = Path("fonts")
+    assert fonts_dir.is_dir()
+
+    name5_re = re.compile(r'^Version (\d+.\d+);GOOG;noto-emoji:\d+:[a-z0-9]+$')
+
+    debug_versions = []
+    versions = set()
+    for font_file in fonts_dir.rglob("*.ttf"):
+        font = ttLib.TTFont(font_file)
+        head_ver = f"{font['head'].fontRevision:.03f}"
+        versions.add(head_ver)
+        debug_versions.append(f"{font_file.name} head {head_ver}")
+        for name in font['name'].names:
+            # name 5 is version
+            if name.nameID != 5:
+                continue
+            if not name.isUnicode():
+                continue
+            match = name5_re.match(name.toUnicode())
+            assert match is not None, f"{name.toUnicode()} is malformed"
+            versions.add(match.group(1))
+            debug_versions.append(f"{font_file.name} name {match.group(1)}")
+    debug_versions = "\n".join(debug_versions)
+    assert len(versions) == 1, f"Should have a consistent version, found\n{debug_versions}"