Merge plugin CLI into here (#404)

npm/cli/index.js

@@ -0,0 +1,20 @@
+const path = require("path");
+const childProcess = require("child_process");
+const { PLATFORM_SPECIFIC_PACKAGE_NAME, BINARY_NAME } = require("./common");
+
+function getBinaryPath() {
+  try {
+    if (!PLATFORM_SPECIFIC_PACKAGE_NAME) {
+      throw new Error("unsupported platform");
+    }
+    return require.resolve(`${PLATFORM_SPECIFIC_PACKAGE_NAME}/bin/${BINARY_NAME}`);
+  } catch (_) {
+    return path.join(__dirname, BINARY_NAME);
+  }
+}
+
+module.exports.runBinary = function runBinary(...args) {
+  childProcess.execFileSync(getBinaryPath(), args, {
+    stdio: "inherit"
+  });
+};