build(update-known-events): initial version

scripts/update-known-events.js

@@ -0,0 +1,60 @@
+const axios = require('axios')
+const cheerio = require('cheerio')
+const { writeFileSync } = require('fs')
+
+updateKnownEventTypes()
+
+async function updateKnownEventTypes () {
+  const { data } = await axios.get('https://developer.github.com/v3/activity/events/types/')
+  const $ = cheerio.load(data)
+
+  const events = $('h3')
+    .filter((index, el) => $(el).text().trim() === 'Webhook event name')
+    .map((index, el) => {
+      const name = $(el).nextUntil('h2, h3').last().text().trim()
+      const $table = $(el).prev()
+
+      if (!$table.is('table')) {
+        return {
+          name,
+          actions: []
+        }
+      }
+
+      const [keyEl,, descriptionEl] = $table.find('tbody tr:first-child td').get()
+
+      if ($(keyEl).text().trim() !== 'action') {
+        return {
+          name,
+          actions: []
+        }
+      }
+
+      const actions = $(descriptionEl)
+        .find('code')
+        .map((index, el) => {
+          return $(el).text().trim()
+        })
+        .get()
+
+      return {
+        name,
+        actions
+      }
+    })
+    .get()
+
+  const newWebhookNames = events.reduce((list, event) => {
+    list.push(event.name, ...event.actions.map(action => `${event.name}.${action}`))
+    return list
+  }, ['*', 'error'])
+
+  // the documentation at https://developer.github.com/v3/activity/events/types/#labelevent
+  // does not include all actions, or the actions are not formatted correctly.
+  // So for the time being we merge into the current webhook names to prevent
+  // events or actions from being removed
+  const currentWebhookNames = require('../lib/webhook-names')
+  const webhookNames = new Set(newWebhookNames.concat(currentWebhookNames).sort())
+
+  writeFileSync('lib/webhook-names.json', JSON.stringify([...webhookNames], null, 2) + '\n')
+}