feat: add build command

lib/commands/build.js

@@ -1,6 +1,60 @@
+const webpackNiceLog = require('webpack-nicelog');
+const webpack = require('webpack');
+const path = require('path');
+const chalk = require('chalk');
+const load = require('../load');
+const createProdConfig = require('../webpack/prod');
+
+function compile(config) {
+  return new Promise((resolve, reject) => {
+    webpack(config, (err, stats) => {
+      if (err) {
+        return reject(err);
+      }
+      if (stats.hasErrors()) {
+        stats.toJson().errors.forEach(e => {
+          console.error(e);
+        });
+        reject(new Error(`Failed to compile with errors.`));
+        return false;
+      }
+      if (stats.hasWarnings()) {
+        stats.toJson().warnings.forEach(warning => {
+          console.warn(warning);
+        });
+      }
+      resolve(stats.toJson({modules: false}));
+      return true;
+    });
+  });
+}
+
 module.exports = async function build(siteDir, cliOptions = {}) {
   process.env.NODE_ENV = 'production';
   console.log('Build command invoked ...');
-  console.log(siteDir);
   console.log(cliOptions);
+
+  const props = await load(siteDir);
+
+  // resolve webpack config
+  let config = createProdConfig(props);
+  config.plugin('WebpackNiceLog').use(webpackNiceLog, [
+    {
+      name: 'Production'
+    }
+  ]);
+
+  // create compiler from generated webpack config
+  config = config.toConfig();
+
+  // compile!
+  await compile(config);
+
+  const {outDir} = props;
+  const relativeDir = path.relative(process.cwd(), outDir);
+  console.log(
+    `\n${chalk.green('Success!')} Generated static files in ${chalk.cyan(
+      relativeDir
+    )}.\n`
+  );
 };