restructure CI into build + smoketest pipeline (#6)

smoketest.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+WHEEL_DIR="${1:?Usage: smoketest.sh <wheel-directory>}"
+WHEEL_DIR="$(cd "$WHEEL_DIR" && pwd)"
+
+VENV_DIR="$(mktemp -d)"
+trap 'rm -rf "$VENV_DIR"' EXIT
+python3 -m venv "$VENV_DIR"
+source "$VENV_DIR/bin/activate"
+pip install --upgrade pip >/dev/null
+pip install "$WHEEL_DIR"/*.whl
+
+for toml in "$REPO_DIR"/*/pyproject.toml; do
+  module="$(basename "$(dirname "$toml")" | tr '-' '_')"
+  python3 -c "import $module; $module.smoketest()" && echo "$module: OK"
+done