feat(cli): add cli entry

bin/freepack.js

@@ -1,4 +1,32 @@
 #!/usr/bin/env node
 
 
-(function() {}());
+(function() {
+    const yargs = require('yargs');
+    const cli = require('../cli');
+    const noop = () => {};
+
+    [Object.assign({
+        cmd: '$0'
+    }, cli)].concat(cli.commands).forEach(command => yargs.command(
+        command.cmd,
+        command.desc || '',
+        command.builder || noop,
+        command.handler || noop
+    ));
+
+    const CONFIG_GROUP = "Config options:";
+
+    yargs
+        .usage(`freepack ${
+            require('../package.json').version
+        }
+
+Usage: freepack [options]
+       freepack <command> [options]`)
+        .help('help')
+        .alias('help', 'h')
+        .version()
+        .alias('version', 'v')
+        .argv
+}());

cli/index.js

@@ -0,0 +1,10 @@
+"use strict";
+
+
+exports.commands = [
+];
+
+exports.builder = () => {};
+
+exports.handler = argv => {
+};

package.json

@@ -26,7 +26,8 @@
   "dependencies": {
     "fs-extra": "^6.0.1",
     "glob": "^7.1.2",
-    "minimatch": "^3.0.4"
+    "minimatch": "^3.0.4",
+    "yargs": "^11.0.0"
   },
   "devDependencies": {
     "commitizen": "^2.9.6",