fix bundle script

Author: cometkim

packages/playground-bundling/scripts/generate_cmijs.js

@@ -27,6 +27,9 @@ const RESCRIPT_COMPILER_ROOT_DIR = path.join(
   "..",
   "..",
 );
+
+const NODE_MODULES_DIR = path.join(RESCRIPT_COMPILER_ROOT_DIR, "node_modules");
+
 const PLAYGROUND_DIR = path.join(RESCRIPT_COMPILER_ROOT_DIR, "playground");
 
 // The playground-bundling root dir
@@ -63,9 +66,7 @@ const packages = resConfig["bs-dependencies"];
 // Otherwise we can't use them for compilation within the playground.
 function buildCompilerCmij() {
   const rescriptLibOcamlFolder = path.join(
-    PROJECT_ROOT_DIR,
-    "node_modules",
-    "rescript",
+    RESCRIPT_COMPILER_ROOT_DIR,
     "lib",
     "ocaml",
   );
@@ -86,15 +87,13 @@ function buildCompilerCmij() {
 function buildThirdPartyCmijs() {
   for (const pkg of packages) {
     const libOcamlFolder = path.join(
-      PROJECT_ROOT_DIR,
-      "node_modules",
+      NODE_MODULES_DIR,
       pkg,
       "lib",
       "ocaml",
     );
     const libEs6Folder = path.join(
-      PROJECT_ROOT_DIR,
-      "node_modules",
+      NODE_MODULES_DIR,
       pkg,
       "lib",
       "es6",