flow like the river

BACK_BACK/node_modules/node-addon-api/doc/checker-tool.md

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+# Checker Tool
+
+**node-addon-api** provides a [checker tool][] that will inspect a given
+directory tree, identifying all Node.js native addons therein, and further
+indicating for each addon whether it is an N-API addon.
+
+## To use the checker tool:
+
+  1. Install the application with `npm install`.
+
+  2. If the application does not depend on **node-addon-api**, copy the
+     checker tool into the application's directory.
+
+  3. If the application does not depend on **node-addon-api**, run the checker
+     tool from the application's directory:
+
+     ```sh
+     node ./check-napi.js
+     ```
+
+     Otherwise, the checker tool can be run from the application's
+     `node_modules/` subdirectory:
+
+     ```sh
+     node ./node_modules/node-addon-api/tools/check-napi.js
+     ```
+
+The tool accepts the root directory from which to start checking for Node.js
+native addons as a single optional command line parameter. If ommitted it will
+start checking from the current directory (`.`).
+
+[checker tool]: ../tools/check-napi.js