Add cli validate command (#124)

.vscode/settings.json

@@ -1,3 +1,6 @@
 {
-    "typescript.tsdk": "node_modules/typescript/lib"
+    "typescript.tsdk": "node_modules/typescript/lib",
+    "cSpell.words": [
+        "hypertuner"
+    ]
 }

README.md

@@ -23,3 +23,11 @@ Proceed with the installation:
 ```bash
 npm i --save @hyper-tuner/ini
 ```
+
+## CLI capabilities
+
+You can also run this package as a CLI tool, example:
+
+```bash
+npx @hyper-tuner/ini validate test/data/ini/202207.ini
+```

package.json

@@ -9,6 +9,9 @@
   },
   "main": "dist/ini.js",
   "types": "dist/ini.d.ts",
+  "bin": {
+    "hypertuner-ini": "dist/cli.js"
+  },
   "files": [
     "dist"
   ],

src/cli.ts

@@ -0,0 +1,59 @@
+#!/usr/bin/env node
+
+import { INI } from './ini';
+import fs from 'fs';
+
+enum Commands {
+  VALIDATE = 'validate',
+}
+
+const loadFile = (filename: string) => {
+  const b = fs.readFileSync(filename);
+  return b.buffer.slice(b.byteOffset, b.byteOffset + b.byteLength);
+};
+
+const showUsage = () => {
+  console.info('\nℹ Usage:');
+  console.info('hypertuner-ini validate some_ini_file.ini');
+  process.exit(1);
+};
+
+const validate = (filename: string) => {
+  const ini = new INI(loadFile(filename));
+
+  try {
+    ini.parse();
+  } catch (error) {
+    console.info('❌ Errors found:');
+    console.info((error as Error).message);
+    process.exit(1);
+  }
+
+  console.info('✅ All good!');
+};
+
+const command = process.argv[2];
+const filename = process.argv[3];
+
+if (!command) {
+  console.info('❗️ Please provide a command to run');
+  showUsage();
+  process.exit(1);
+}
+
+if (!filename) {
+  console.info('❗️ Please provide a file name');
+  showUsage();
+  process.exit(1);
+}
+
+switch (command) {
+  case Commands.VALIDATE:
+    validate(filename);
+    break;
+
+  default:
+    console.info(`❗️ Unknown command: ${command}, please use one of: [${Object.values(Commands).join(', ')}]`);
+    process.exit(1);
+    break;
+}