Working loading of plugin

packages/gitbook-plugin/src/cli.js

@@ -1,13 +1,26 @@
-const program = require('commander');
-const pkg = require('../package.json');
+#! /usr/bin/env node
 
-program.version(pkg.version)
+const program = require('commander');
+const path = require('path');
+const winston = require('winston');
+
+const pkg = require('../package.json');
+const compile = require('./compile');
+
+const resolve = (input => path.resolve(process.cwd(), input));
+
+program.version(pkg.version);
+winston.cli();
 
 program
-    .command('build [plugin]')
-    .description('build a plugin')
-    .action(function(plugin, options) {
-
+    .command('build [input] [output]')
+    .description('build a browser plugin')
+    .action(function(input, output, options) {
+        compile(resolve(input), resolve(output))
+        .then(
+            () => winston.info('Plugin compiled successfully'),
+            (err) => winston.error('Error: ', err)
+        );
     });
 
 

packages/gitbook-plugin/src/compile.js

@@ -0,0 +1,39 @@
+const fs = require('fs');
+const Promise = require('q');
+const browserify = require('browserify');
+const babelify = require('babelify');
+
+/**
+ * Compile a plugin to work with "gitbook-core" in the browser.
+ * @param {String} inputFile
+ * @param {String} outputFile
+ * @return {Promise}
+ */
+function compilePlugin(inputFile, outputFile) {
+    const d = Promise.defer();
+    const b = browserify({
+        standalone: 'GitBookPlugin'
+    });
+
+    b.add(inputFile);
+    b.external('react');
+    b.external('react-dom');
+    b.external('gitbook-core');
+    b.transform(babelify, {
+        presets: [
+            require('babel-preset-es2015'),
+            require('babel-preset-react')
+        ]
+    });
+
+    const output = fs.createWriteStream(outputFile);
+
+    b.bundle()
+    .pipe(output)
+    .on('error', (err) => d.reject(err))
+    .on('end', () => d.resolve());
+
+    return d.promise;
+}
+
+module.exports = compilePlugin;