Create build script

Signed-off-by: soupette <cyril.lpz@gmail.com>

packages/core/admin/package.json

@@ -7,6 +7,7 @@
     "url": "git://github.com/strapi/strapi.git"
   },
   "scripts": {
+    "prepublishOnly": "node ./scripts/build.js",
     "test": "echo \"no tests yet\"",
     "develop": "webpack serve --config webpack.config.dev.js --progress profile",
     "develop:ce": "STRAPI_DISABLE_EE=true webpack serve --config webpack.config.dev.js --progress profile",

packages/core/admin/scripts/build.js

@@ -0,0 +1,67 @@
+'use strict';
+
+const path = require('path');
+const webpack = require('webpack');
+const webpackConfig = require('../webpack.config');
+
+const buildAdmin = async () => {
+  const entry = path.join(__dirname, '..', 'admin', 'src');
+  const dest = path.join(__dirname, '..', 'build');
+
+  const args = {
+    entry,
+    dest,
+    env: 'production',
+    optimize: true,
+    options: {
+      backend: 'http://localhost:1337',
+      adminPath: '/admin/',
+      features: [],
+    },
+    useEE: false,
+  };
+
+  const compiler = webpack(webpackConfig(args));
+
+  console.log('Building the admin panel');
+
+  return new Promise((resolve, reject) => {
+    compiler.run((err, stats) => {
+      let messages;
+      if (err) {
+        if (!err.message) {
+          return reject(err);
+        }
+        messages = {
+          errors: [err.message],
+          warnings: [],
+        };
+      } else {
+        messages = stats.toJson({ all: false, warnings: true, errors: true });
+      }
+
+      if (messages.errors.length) {
+        // Only keep the first error. Others are often indicative
+        // of the same problem, but confuse the reader with noise.
+        if (messages.errors.length > 1) {
+          messages.errors.length = 1;
+        }
+        return reject(new Error(messages.errors.join('\n\n')));
+      }
+
+      return resolve({
+        stats,
+        warnings: messages.warnings,
+      });
+    });
+  });
+};
+
+buildAdmin()
+  .then(() => {
+    process.exit();
+  })
+  .catch(err => {
+    console.error(err);
+    process.exit(1);
+  });