Pregenerate the icons with a mix task

priv/templates/icon_set.ex

@@ -0,0 +1,58 @@
+defmodule <%= inspect module %> do
+  @moduledoc """
+  <%= moduledoc %>
+  """
+
+  use Phoenix.Component
+
+  if function_exported?(Phoenix.Component, :assigns_to_attributes, 2) do
+    @assign_mod Phoenix.Component
+    @assigns_to_attrs_mod Phoenix.Component
+  else
+    @assign_mod Phoenix.LiveView
+    @assigns_to_attrs_mod Phoenix.LiveView.Helpers
+  end
+  <%= for path <- icon_paths, name = icon_name(path), body = icon_body(path, svg_opts) do %>
+  @doc """
+  ![](assets/<%= Path.relative_to(path, :code.priv_dir(:heroicons)) %>) {: width=24px}
+
+  ## Examples
+
+  Use as a `Phoenix.Component`
+
+      <%= ~s(<.#{name} />) %>
+
+      <%= ~s(<.#{name} class="h-6 w-6 text-gray-500" />) %>
+
+  or as a function
+
+      <%= ~s(<%= #{name}() %>) %>
+
+      <%= ~s(<%= #{name}(class: "h-6 w-6 text-gray-500") %>) %>
+  """
+  def <%= name %>(assigns_or_opts \\ [])
+
+  def <%= name %>(assigns) when is_map(assigns) do
+    attrs = @assigns_to_attrs_mod.assigns_to_attributes(assigns)
+    assigns = @assign_mod.assign(assigns, :attrs, attrs)
+
+    ~H"""
+    <svg {@attrs} <%= String.replace(body, "\n", "\n    ") %>
+    """
+  end
+
+  def <%= name %>(opts) when is_list(opts) do
+    attrs =
+      for {k, v} <- opts do
+        safe_k =
+          k |> Atom.to_string() |> String.replace("_", "-") |> Phoenix.HTML.Safe.to_iodata()
+
+        safe_v = v |> Phoenix.HTML.Safe.to_iodata()
+
+        {:safe, [?\s, safe_k, ?=, ?", safe_v, ?"]}
+      end
+
+    {:safe, ["<svg", Phoenix.HTML.Safe.to_iodata(attrs), <%= inspect " " <> body, printable_limit: :infinity %>]}
+  end
+<% end %>
+end