Add py3 antlr4 python runtime.

py3-antlr4-python3-runtime.yaml

@@ -0,0 +1,46 @@
+package:
+  name: py3-antlr4-python3-runtime
+  version: 4.13.1
+  epoch: 0
+  description: ANTLR runtime for Python 3
+  copyright:
+    - license: BSD-3
+  dependencies:
+    runtime:
+      - python-3
+
+environment:
+  contents:
+    packages:
+      - build-base
+      - busybox
+      - ca-certificates-bundle
+      - py3-gpep517
+      - py3-pip
+      - py3-setuptools
+      - py3-wheel
+      - wolfi-base
+
+pipeline:
+  - uses: git-checkout
+    with:
+      expected-commit: 7ed420ff2c78d62883875c442d75f32e73bc86c8
+      repository: https://github.com/antlr/antlr4
+      tag: ${{package.version}}
+
+  - runs: |
+      cd runtime/Python3
+      export SETUPTOOLS_SCM_PRETEND_VERSION=${{package.version}}
+      python3 -m pip install -U poetry
+      python3 -m gpep517 build-wheel \
+        --wheel-dir dist \
+        --output-fd 3 3>&1 >&2
+      python3 -m installer -d "${{targets.destdir}}" \
+        dist/*.whl
+
+  - uses: strip
+
+update:
+  enabled: true
+  github:
+    identifier: antlr/antlr4