feat: add mercury-parser cli (#244)

cli.js

@@ -0,0 +1,24 @@
+#!/usr/bin/env node
+/* eslint-disable no-multi-str */
+
+const Mercury = require('./dist/mercury');
+
+const [, , url] = process.argv;
+
+(async urlToParse => {
+  if (!urlToParse) {
+    console.log(
+      '\n\
+mercury-parser\n\n\
+    The Mercury Parser extracts semantic content from any url\n\n\
+Usage:\n\
+\n\
+    mercury-parser [url-to-parse]\n\
+\n\
+'
+    );
+    return;
+  }
+  const result = await Mercury.parse(urlToParse);
+  console.log(JSON.stringify(result, null, 2));
+})(url);

package.json

@@ -20,6 +20,9 @@
     "content"
   ],
   "main": "./dist/mercury.js",
+  "bin": {
+    "mercury-parser": "./cli.js"
+  },
   "scripts": {
     "lint": "eslint . --fix",
     "lint:ci": "remark . && eslint .",