1. fails the build if it gets an rate limiting API from the data source.

2. Adds cache plugin to keep the `.cache` folder around to reduce API requests.

Author: zachleat

netlify.toml

@@ -37,6 +37,8 @@
   status = 404
 
 
+[[plugins]]
+  package = "./plugins/keep-dot-cache-folder"
 
 # Config for the Netlify Build Plugin: netlify-plugin-minify-html
 [[plugins]]

plugins/keep-dot-cache-folder/index.js

@@ -0,0 +1,15 @@
+module.exports = {
+  // Restore file/directory cached in previous builds.
+  // Does not do anything if:
+  //  - the file/directory already exists locally
+  //  - the file/directory has not been cached yet
+  async onPreBuild({ utils }) {
+    await utils.cache.restore('./.cache');
+  },
+  // Cache file/directory for future builds.
+  // Does not do anything if:
+  //  - the file/directory does not exist locally
+  async onPostBuild({ utils }) {
+    await utils.cache.save('./.cache');
+  }
+};

plugins/keep-dot-cache-folder/manifest.yml

@@ -0,0 +1 @@
+name: keep-dot-cache-folder

src/site/_data/github.js

@@ -69,7 +69,10 @@ async function githubRequest(user, repo) {
   try {
     req = await CacheAsset(url, opts);
     if(req.errors && req.errors.length) {
-      console.log( "Error", req.errors );
+      console.log( "GitHub Data Source Error from API", req.errors );
+      if(req.errors.filter(e => e.type === "RATE_LIMITED").length > 0) {
+        throw new Error("Failing the build due to GitHub API rate limiting.");
+      }
       return errorData;
     }
 
@@ -79,7 +82,8 @@ async function githubRequest(user, repo) {
       issues: req.data.repository.issues.totalCount,
     }
   } catch(e) {
-    console.log( "Error", e );
+    console.log( "GitHub Data Source Error", e );
+
     return errorData;
   }
 }