feat: Ping search engines

.gitlab-ci.yml

@@ -15,3 +15,8 @@ pages:
   artifacts:
     paths:
       - public
+ping:
+  needs:
+  - "pages:deploy"
+  script:
+  - mix pre_dot_hn.ping

lib/mix/tasks/pre_dot_hn/ping.ex

@@ -0,0 +1,20 @@
+defmodule Mix.Tasks.PreDotHn.Ping do
+  use Mix.Task
+
+   @urls [
+    "http://google.com/ping?sitemap=%s",
+    "http://www.bing.com/webmaster/ping.aspx?sitemap=%s"
+  ]
+
+  def ping(sitemap_url) do
+    @urls
+    |> Enum.map(fn url ->
+      ping_url = String.replace(url, "%s", sitemap_url)
+      :httpc.request('#{ping_url}')
+    end)
+  end
+
+  def run(_args) do
+    ping("https://pre.hn/sitemap.xml.gz")
+  end
+end