Add error for babel-version <6.14.0

packages/babel-preset-babili/src/index.js

@@ -1,20 +1,38 @@
+const plugins = [
+  require("babel-plugin-minify-constant-folding"),
+  require("babel-plugin-minify-dead-code-elimination"),
+  require("babel-plugin-minify-flip-comparisons"),
+  require("babel-plugin-minify-guarded-expressions"),
+  require("babel-plugin-minify-infinity"),
+  require("babel-plugin-minify-mangle-names"),
+  require("babel-plugin-minify-replace"),
+  require("babel-plugin-minify-simplify"),
+  require("babel-plugin-minify-type-constructors"),
+  require("babel-plugin-transform-member-expression-literals"),
+  require("babel-plugin-transform-merge-sibling-variables"),
+  require("babel-plugin-transform-minify-booleans"),
+  require("babel-plugin-transform-property-literals"),
+  require("babel-plugin-transform-simplify-comparison-operators"),
+  require("babel-plugin-transform-undefined-to-void"),
+];
+
 module.exports = {
   minified: true,
   plugins: [
-    require("babel-plugin-minify-constant-folding"),
-    require("babel-plugin-minify-dead-code-elimination"),
-    require("babel-plugin-minify-flip-comparisons"),
-    require("babel-plugin-minify-guarded-expressions"),
-    require("babel-plugin-minify-infinity"),
-    require("babel-plugin-minify-mangle-names"),
-    require("babel-plugin-minify-replace"),
-    require("babel-plugin-minify-simplify"),
-    require("babel-plugin-minify-type-constructors"),
-    require("babel-plugin-transform-member-expression-literals"),
-    require("babel-plugin-transform-merge-sibling-variables"),
-    require("babel-plugin-transform-minify-booleans"),
-    require("babel-plugin-transform-property-literals"),
-    require("babel-plugin-transform-simplify-comparison-operators"),
-    require("babel-plugin-transform-undefined-to-void"),
+    function ({version}) {
+      validateVersion(version);
+      return {visitor: {}};
+    },
+    ...plugins
   ],
 };
+
+function validateVersion(versionStr) {
+  const version = versionStr.split(".");
+  if (!(version[0] === "6" && parseInt(version[1]) >= 14)) {
+    throw new Error(
+      "Babili requires babel-core>=6.14.0. " +
+      "Upgrade babel-core or tools dependent on babel-core to recent versions"
+    );
+  }
+}