[Draft] Fail build process upon @Inject interpolation failure (in production)

app/[[...path]]/page.tsx

@@ -10,10 +10,15 @@ import {DocPage} from 'sentry-docs/components/docPage';
 import {Home} from 'sentry-docs/components/home';
 import {Include} from 'sentry-docs/components/include';
 import {PlatformContent} from 'sentry-docs/components/platformContent';
-import {getDocsRootNode, nodeForPath} from 'sentry-docs/docTree';
+import {
+  getCurrentPlatformOrGuide,
+  getDocsRootNode,
+  nodeForPath,
+} from 'sentry-docs/docTree';
 import {getDocsFrontMatter, getFileBySlug} from 'sentry-docs/mdx';
 import {mdxComponents} from 'sentry-docs/mdxComponents';
 import {setServerContext} from 'sentry-docs/serverContext';
+import {capitilize} from 'sentry-docs/utils';
 
 export async function generateStaticParams() {
   const docs = await getDocsFrontMatter();
@@ -112,10 +117,14 @@ export async function generateMetadata({params}: MetadataProps): Promise<Metadat
   const images = [{url: `${domain}/meta.png`, width: 1200, height: 630}];
 
   const rootNode = await getDocsRootNode();
+
   if (rootNode && params.path) {
     const pageNode = nodeForPath(rootNode, params.path);
     if (pageNode) {
-      title = pageNode.frontmatter.title;
+      const guideOrPlatform = getCurrentPlatformOrGuide(rootNode, params.path);
+      title =
+        pageNode.frontmatter.title +
+        (guideOrPlatform ? ` | Sentry for ${capitilize(guideOrPlatform.name)}` : '');
       description = pageNode.frontmatter.description;
     }
   }

src/remark-variables.js

@@ -33,6 +33,7 @@ export default function remarkVariables(options) {
 
     const scope = await options.resolveScopeData();
 
+    const interplolationError = new Error(`Failed to interpolate expression: "${expr}"`);
     visit(
       markdownAST,
       () => true,
@@ -59,11 +60,21 @@ export default function remarkVariables(options) {
           try {
             result = scopedEval(expr, {...scope, page});
           } catch (err) {
-            console.error(`Failed to interpolate expression: "${expr}"`);
+            console.error(interplolationError);
             throw err;
           }
 
-          node.value = node.value.replace(match[0], result);
+          if (result) {
+            node.value = node.value.replace(match[0], result);
+          } else {
+            // fail the build process in production
+            if (process.env.NODE_ENV === 'production') {
+              console.error(interplolationError);
+              // this is probably the only way to foce the build to fail
+              process.exit(1);
+            }
+            throw interplolationError;
+          }
         });
       }
     );

src/utils.ts

@@ -15,6 +15,10 @@ export function sortBy<A>(arr: A[], comp: (v: A) => number): A[] {
   });
 }
 
+export const capitilize = (str: string) => {
+  return str.charAt(0).toUpperCase() + str.slice(1);
+};
+
 type Page = {
   context: {
     sidebar_order?: number;