Only run on certain actions

lib/main.js

@@ -5,10 +5,16 @@ const fs = require('fs');
 async function run() {
   try {
     const payload = process.env.GITHUB_EVENT_PATH ? require(process.env.GITHUB_EVENT_PATH) : {}
-    const { release: { id: release_id, draft: isDraft }} = payload
-    if (isDraft) {
-        // Only upload to non-draft releases
-        return
+    const { action: action, release: { id: release_id }} = payload
+    // https://developer.github.com/v3/activity/events/types/#releaseevent
+    switch (action) {
+        case "published":
+        case "created":
+        case "prereleased":
+            break
+        default:
+            console.log(`Skipping release: ${action}`)
+            return
     }
 
     const [owner, repo] = process.env.GITHUB_REPOSITORY.split('/')
@@ -25,6 +31,13 @@ async function run() {
     const { data: { upload_url: url } } = await octokit.repos.getRelease({owner, repo, release_id})
     console.log(`Upload URL: ${url}`)
 
+    const { data: assets } = await octokit.repos.listAssetsForRelease({owner, repo, release_id})
+    assets.forEach(({ id: asset_id, name: asset_name }) => {
+        if (asset_name == name) {
+            octokit.repos.deleteReleaseAsset({owner, repo, asset_id})
+        }
+    })
+
     const headers = {
         'content-type': contentType,
         'content-length': fs.statSync(path).size,