Add minimal GitHub Actions CI and safety pattern checks

.github/workflows/ci.yml

@@ -0,0 +1,42 @@
+name: CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Typecheck
+        run: npm run typecheck
+
+      - name: Build check
+        run: npm run build
+
+      - name: Test
+        run: npm test
+
+      - name: Safety pattern checks
+        run: npm run safety:check

package.json

@@ -4,7 +4,11 @@
   "description": "Node.js CLI/library for V2H devices over ECHONET Lite",
   "main": "index.js",
   "scripts": {
-    "test": "node --check index.js && node --check cli.js"
+    "test": "node --check index.js && node --check cli.js",
+    "lint": "node --check index.js && node --check cli.js && node --check lib/common.js && node --check lib/discover.js && node --check lib/status.js && node --check lib/format.js",
+    "typecheck": "node --check index.js && node --check cli.js && node --check lib/common.js && node --check lib/discover.js && node --check lib/status.js && node --check lib/format.js && node --check scripts/safety-checks.js",
+    "build": "npm pack --dry-run",
+    "safety:check": "node scripts/safety-checks.js"
   },
   "bin": {
     "v2h": "cli.js"

scripts/safety-checks.js

@@ -0,0 +1,71 @@
+#!/usr/bin/env node
+const fs = require('fs');
+const path = require('path');
+
+const ROOT = process.cwd();
+const SCAN_EXT = new Set(['.js', '.cjs', '.mjs']);
+const EXCLUDE_DIRS = new Set(['.git', 'node_modules']);
+
+const ALLOWED_ECHONET_FILES = new Set([
+  path.normalize('lib/common.js'),
+  path.normalize('lib/discover.js'),
+  path.normalize('lib/status.js'),
+  path.normalize('cli.js'),
+]);
+
+function walk(dir, files = []) {
+  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+    if (EXCLUDE_DIRS.has(entry.name)) continue;
+    const full = path.join(dir, entry.name);
+    if (entry.isDirectory()) {
+      walk(full, files);
+    } else if (entry.isFile() && SCAN_EXT.has(path.extname(entry.name))) {
+      files.push(full);
+    }
+  }
+  return files;
+}
+
+function lineOf(text, index) {
+  return text.slice(0, index).split('\n').length;
+}
+
+const findings = [];
+for (const file of walk(ROOT)) {
+  if (path.normalize(path.relative(ROOT, file)) === path.normalize('scripts/safety-checks.js')) continue;
+  const rel = path.normalize(path.relative(ROOT, file));
+  const text = fs.readFileSync(file, 'utf8');
+
+  const whileTrue = /while\s*\(\s*true\s*\)/g;
+  const forEver = /for\s*\(\s*;\s*;\s*\)/g;
+  const lowSetInterval = /setInterval\s*\((?:.|\n|\r)*?,\s*(\d+)\s*\)/g;
+  const directEchonet = /(require\(['"]echonet-lite['"]\)|from\s+['"]echonet-lite['"]|\bechonet\.sendOPC1\s*\(|\bechonet\.initialize\s*\()/g;
+
+  let m;
+  while ((m = whileTrue.exec(text))) {
+    findings.push(`${rel}:${lineOf(text, m.index)} infinite loop pattern: while(true)`);
+  }
+  while ((m = forEver.exec(text))) {
+    findings.push(`${rel}:${lineOf(text, m.index)} infinite loop pattern: for(;;)`);
+  }
+  while ((m = lowSetInterval.exec(text))) {
+    const ms = Number(m[1]);
+    if (Number.isFinite(ms) && ms < 1000) {
+      findings.push(`${rel}:${lineOf(text, m.index)} setInterval below 1000ms: ${ms}`);
+    }
+  }
+
+  if (!ALLOWED_ECHONET_FILES.has(rel)) {
+    while ((m = directEchonet.exec(text))) {
+      findings.push(`${rel}:${lineOf(text, m.index)} direct hardware API pattern outside approved wrappers`);
+    }
+  }
+}
+
+if (findings.length) {
+  console.error('Safety pattern checks failed:\n');
+  findings.forEach((f) => console.error(`- ${f}`));
+  process.exit(1);
+}
+
+console.log('Safety pattern checks passed.');