From a8c3398f7fc518c9ff21717431a0f4b036620e99 Mon Sep 17 00:00:00 2001
From: Robert Jackson <rjackson@linkedin.com>
Date: Fri, 5 Feb 2021 17:23:07 -0500
Subject: [PATCH] Make cacheKey calculation lazy

Co-authored-by: Kris Selden <kselden@linkedin.com>
---
 index.js           | 13 ++++++++++---
 lib/ast-plugins.js | 10 ++++++++--
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/index.js b/index.js
index b91d8ed6..9d6555de 100644
--- a/index.js
+++ b/index.js
@@ -78,12 +78,19 @@ module.exports = {
             parallelConfig
           }
         };
-        // parallelBabelInfo will not be used in the cache unless it is explicitly included
-        let cacheKey = AstPlugins.makeCacheKey(templateCompilerPath, pluginInfo, JSON.stringify(parallelBabelInfo));
+
+        let cacheKey;
         babelPlugins.push({
           _parallelBabel: parallelBabelInfo,
           baseDir: () => __dirname,
-          cacheKey: () => cacheKey,
+          cacheKey: () => {
+            if (cacheKey === undefined) {
+              // parallelBabelInfo will not be used in the cache unless it is explicitly included
+              cacheKey = AstPlugins.makeCacheKey(templateCompilerPath, pluginInfo, JSON.stringify(parallelBabelInfo));
+            }
+
+            return cacheKey;
+          },
         });
       }
       else {
diff --git a/lib/ast-plugins.js b/lib/ast-plugins.js
index 72fd9ba5..de72593c 100644
--- a/lib/ast-plugins.js
+++ b/lib/ast-plugins.js
@@ -53,7 +53,7 @@ module.exports = {
     global.EmberENV = clonedEmberENV;
 
     let Compiler = require(templateCompilerPath);
-    let cacheKey = this.makeCacheKey(templateCompilerPath, pluginInfo);
+    let cacheKey;
 
     let precompileInlineHTMLBarsPlugin;
 
@@ -61,7 +61,13 @@ module.exports = {
 
     let precompile = Compiler.precompile;
     precompile.baseDir = () => path.resolve(__dirname, '..');
-    precompile.cacheKey = () => cacheKey;
+    precompile.cacheKey = () => {
+      if (cacheKey === undefined) {
+        cacheKey = this.makeCacheKey(templateCompilerPath, pluginInfo);
+      }
+
+      return cacheKey;
+    };
 
     let modulePaths = ['ember-cli-htmlbars-inline-precompile', 'htmlbars-inline-precompile'];
     precompileInlineHTMLBarsPlugin = [HTMLBarsInlinePrecompilePlugin, { precompile, modulePaths }];