Build system overhaul.

build/stamp.js

@@ -0,0 +1,40 @@
+const fs = require('fs')
+
+fs.readFile('package.json', (err, data) => {
+  if (err) throw err
+
+  const pkg = JSON.parse(data)
+  const year = new Date().getFullYear()
+
+  const stampTop =
+`/*!
+ * Bootstrap v${pkg.version} (${pkg.homepage})
+ * Copyright 2011-${year} ${pkg.author} 
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
+
+if (typeof jQuery === 'undefined') {
+  throw new Error('Bootstrap\\'s JavaScript requires jQuery. jQuery must be included before Bootstrap\\'s JavaScript.')
+}
+
+(function ($) {
+  var version = $.fn.jquery.split(' ')[0].split('.')
+  if ((version[0] < 2 && version[1] < 9) || (version[0] == 1 && version[1] == 9 && version[2] < 1) || (version[0] >= 4)) {
+    throw new Error('Bootstrap\\'s JavaScript requires at least jQuery v1.9.1 but less than v4.0.0')
+  }
+})(jQuery);
+
+(function () {
+`
+  const stampEnd = `
+})()`
+
+  process.stdout.write(stampTop)
+
+  process.stdin.on('end', () => {
+    process.stdout.write(stampEnd);
+  });
+
+  process.stdin.pipe(process.stdout)
+})
+