cleaning up the netlify plugin

didn't actually try just passing an array of dirs to Netlify plugin, and now only saving cache if build successful

[skip ci]

plugins/netlify-plugin-cache/index.js

@@ -1,27 +1,30 @@
-// Based on https://github.com/cdeleeuwe/netlify-plugin-hugo-cache-resources/blob/master/index.js
+// https://github.com/netlify/build/blob/master/packages/cache-utils/README.md
 
 module.exports = {
-  async onPreBuild({ utils, inputs }) {
-    const paths = JSON.parse(inputs.paths);
-    const success = await utils.cache.restore(paths);
-
-    if (success) {
-      const cachedFiles = await utils.cache.list(paths);
-      console.log(`Restored cache of '${paths}', totaling ${cachedFiles.length} files.`);
+  // try to restore cache before build begins, if it exists
+  onPreBuild: async ({ utils: { cache }, inputs }) => {
+    if (await cache.restore(inputs.paths)) {
+      const files = await cache.list(inputs.paths)
+      console.log(`Successfully restored: ${inputs.paths.join(', ')} ... ${files.length} files in total.`)
     } else {
-      console.log(`A cache of '${paths}' doesn't exist (yet).`);
+      console.log(`A cache of ${inputs.paths.join(', ')} doesn't exist (yet).`)
     }
   },
 
-  async onPostBuild({ utils, inputs }) {
-    const paths = JSON.parse(inputs.paths);
-    const success = await utils.cache.save(paths);
+  // only save/update cache if build was successful
+  onSuccess: async ({ utils: { cache, status }, inputs }) => {
+    if (await cache.save(inputs.paths)) {
+      const files = await cache.list(inputs.paths)
+      console.log(`Successfully cached: ${inputs.paths.join(', ')} ... ${files.length} files in total.`)
 
-    if (success) {
-      const cachedFiles = await utils.cache.list(paths);
-      console.log(`Successfully cached '${paths}', totaling ${cachedFiles.length} files.`);
+      // show success & more detail in deploy summary
+      status.show({
+        title: `${files.length} files cached`,
+        summary: 'These will be restored on the next build! ⚡',
+        text: `${inputs.paths.join(', ')}`,
+      })
     } else {
-      console.log(`Couldn't cache '${paths}'.`);
+      console.log(`Failed caching ${inputs.paths.join(', ')}. :(`)
     }
-  }
-};
+  },
+}

plugins/netlify-plugin-cache/manifest.yml

@@ -1,4 +1,5 @@
 name: netlify-plugin-cache
 inputs:
 - name: paths
-  description: Array of directories to cache between builds.
+  description: Array of files and/or directories to cache between builds.
+  required: true