built a simple cli using caporal

bin/qnm.js

@@ -1,9 +1,3 @@
 #! /usr/bin/env node
 
-const NodeModules = require('../src/index');
-
-const nm = NodeModules.loadSync();
-
-const v = nm.getVersion(process.argv[2]);
-
-console.log(v);
+require('../src/cli');

package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "description": "query node_modules directory",
   "bin": "bin/qnm.js",
-  "main": "index.js",
+  "main": "workspace.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
@@ -20,7 +20,6 @@
     "eslint-plugin-import": "~2.9.0"
   },
   "dependencies": {
-    "glob": "~7.1.2",
-    "lodash": "~4.17.5"
+    "caporal": "~0.10.0"
   }
 }

src/cli.js

@@ -0,0 +1,20 @@
+const prog = require('caporal');
+const pkg = require('../package.json');
+const Workspace = require('../src/workspace');
+
+prog
+  .version(pkg.version)
+  .argument('[module]', 'prints module version from the node_modules')
+  .action((args, options, logger) => {
+    if (!args.module) {
+      console.log(prog._helper.get()); // eslint-disable-line no-console
+      return;
+    }
+
+    const nm = Workspace.loadSync({ logger });
+    const version = nm.getVersion(args.module);
+    console.log(version); // eslint-disable-line no-console
+  });
+
+prog.parse(process.argv);
+

src/index.js → src/workspace.js

@@ -1,9 +1,10 @@
 const ModulesMap = require('./modules-map');
 
-module.exports = class NodeModules {
-  constructor({ root, modulesMap }) {
+module.exports = class Workspace {
+  constructor({ root, modulesMap, logger }) {
     this.root = root;
     this.modulesMap = modulesMap;
+    this.logger = logger;
   }
 
   getVersion(packageName) {
@@ -15,10 +16,10 @@ module.exports = class NodeModules {
     // implement
   }
 
-  static loadSync(cwd = process.cwd()) {
+  static loadSync({ cwd = process.cwd(), logger }) {
     // TODO
     // identify nodeModules recursivly
     const modulesMap = ModulesMap.loadSync(cwd);
-    return new NodeModules({ cwd, modulesMap });
+    return new Workspace({ cwd, modulesMap, logger });
   }
 };