limit caching to CI

Author: BYK

next.config.ts

@@ -38,10 +38,6 @@ const nextConfig = {
   trailingSlash: true,
   serverExternalPackages: ['rehype-preset-minify'],
   outputFileTracingExcludes,
-  experimental: {
-    webpackBuildWorker: true,
-    parallelServerCompiles: true,
-  },
   webpack: (config, options) => {
     config.plugins.push(
       codecovNextJSWebpackPlugin({

src/mdx.ts

@@ -240,7 +240,7 @@ async function getAllFilesFrontMatter(): Promise<FrontMatter[]> {
       ) as PlatformConfig;
     } catch (err) {
       // the file may not exist and that's fine, for anything else we throw
-      if (err.code !== 'ENOENT' && err.code !== 'ABORT_ERR') {
+      if (err.code !== 'ENOENT') {
         throw err;
       }
     }
@@ -476,17 +476,21 @@ export async function getFileBySlug(slug: string): Promise<SlugFile> {
     );
   }
 
-  const cacheKey = md5(source);
-  const cacheFile = path.join(CACHE_DIR, cacheKey);
+  let cacheKey: string | null = null;
+  let cacheFile: string | null = null;
+  if (process.env.CI === '1') {
+    cacheKey = md5(source);
+    cacheFile = path.join(CACHE_DIR, cacheKey);
 
-  try {
-    const cached = await readCacheFile<SlugFile>(cacheFile);
-    return cached;
-  } catch (err) {
-    if (err.code !== 'ENOENT') {
-      // If cache is corrupted, ignore and proceed
-      // eslint-disable-next-line no-console
-      console.warn(`Failed to read MDX cache: ${cacheFile}`, err);
+    try {
+      const cached = await readCacheFile<SlugFile>(cacheFile);
+      return cached;
+    } catch (err) {
+      if (err.code !== 'ENOENT' && err.code !== 'ABORT_ERR') {
+        // If cache is corrupted, ignore and proceed
+        // eslint-disable-next-line no-console
+        console.warn(`Failed to read MDX cache: ${cacheFile}`, err);
+      }
     }
   }
 
@@ -615,10 +619,12 @@ export async function getFileBySlug(slug: string): Promise<SlugFile> {
     },
   };
 
-  writeCacheFile(cacheFile, JSON.stringify(resultObj)).catch(e => {
-    // eslint-disable-next-line no-console
-    console.warn(`Failed to write MDX cache: ${cacheFile}`, e);
-  });
+  if (cacheFile) {
+    writeCacheFile(cacheFile, JSON.stringify(resultObj)).catch(e => {
+      // eslint-disable-next-line no-console
+      console.warn(`Failed to write MDX cache: ${cacheFile}`, e);
+    });
+  }
 
   return resultObj;
 }