Implement mix update script

lib/mix/tasks/heroicons.ex

@@ -0,0 +1,29 @@
+defmodule Mix.Tasks.Heroicons do
+  @moduledoc """
+  Invokes heroicons mix utilities.
+  Usage:
+      $ mix heroicons
+  """
+
+  @shortdoc "Invokes heroicons mix utilities"
+
+  use Mix.Task
+
+  @impl true
+  def run(args) do
+    {_opts, args} = OptionParser.parse!(args, strict: [])
+
+    case args do
+      [] -> help()
+      _ -> Mix.raise("Invalid arguments, expected: mix heroicons")
+    end
+  end
+
+  defp help() do
+    Mix.Task.run("app.start")
+    Mix.shell().info("Heroicons v#{Application.spec(:heroicons, :vsn)}")
+    Mix.shell().info("Include Heroicons as SVG-strings in your Elixir/Phoenix project!")
+    Mix.shell().info("\nAvailable tasks:\n")
+    Mix.Tasks.Help.run(["--search", "heroicons."])
+  end
+end

lib/mix/tasks/heroicons/update.ex

@@ -0,0 +1,22 @@
+defmodule Mix.Tasks.Heroicons.Update do
+  @moduledoc """
+  Update heroicons.
+  By default, it downloads the latest version but you
+  can configure it in your config files, such as:
+      config :heroicons, :version, "#{Heroicons.latest_version()}"
+  """
+
+  @shortdoc "Update heroicons assets"
+
+  use Mix.Task
+
+  @impl true
+  def run(args) do
+    {_opts, args} = OptionParser.parse!(args, strict: [])
+
+    case args do
+      [] -> Heroicons.update()
+      _ -> Mix.raise("Invalid arguments, expected: mix heroicons.update")
+    end
+  end
+end