Extract Tailwind release helpers

lib/mix/tasks/tailwind/check_version.ex

@@ -8,19 +8,12 @@ defmodule Mix.Tasks.Tailwind.CheckVersion do
   Exits with 0 if versions match, 1 if the Tailwind needs to be updated.
   """
 
+  alias Mix.Tasks.Tailwind.Release
+
   @impl Mix.Task
   def run(_args) do
-    Application.ensure_all_started(:req)
+    current_version = Release.fetch_current_version()
-
+    latest_version = Release.fetch_latest_version!()
-    current_version =
-      Application.get_env(:tailwind, :version)
-
-    latest_version_url =
-      "https://api.github.com/repos/tailwindlabs/tailwindcss/releases/latest"
-
-    latest_version =
-      Req.get!(latest_version_url).body["tag_name"]
-      |> String.replace_prefix("v", "")
 
     if current_version !== latest_version do
       Mix.Shell.IO.info(

lib/mix/tasks/tailwind/release.ex

@@ -0,0 +1,27 @@
+defmodule Mix.Tasks.Tailwind.Release do
+  @latest_version_url "https://api.github.com/repos/tailwindlabs/tailwindcss/releases/latest"
+
+  def fetch_latest_version! do
+    Application.ensure_all_started(:req)
+
+    Req.get!(@latest_version_url).body["tag_name"]
+    |> String.replace_prefix("v", "")
+  end
+
+  def fetch_current_version do
+    Application.get_env(:tailwind, :version)
+  end
+
+  def update_config_file!(config_file, current_version, latest_version) do
+    config_contents = File.read!(config_file)
+
+    new_config_contents =
+      String.replace(
+        config_contents,
+        ~s(version: "#{current_version}"),
+        "version: \"#{latest_version}\""
+      )
+
+    File.write!(config_file, new_config_contents)
+  end
+end

lib/mix/tasks/tailwind/update_version.ex

@@ -6,19 +6,12 @@ defmodule Mix.Tasks.Tailwind.UpdateVersion do
   Update the configured tailwind versino to latest.
   """
 
+  alias Mix.Tasks.Tailwind.Release
+
   @impl Mix.Task
   def run(_args) do
-    Application.ensure_all_started(:req)
+    current_version = Release.fetch_current_version()
-
+    latest_version = Release.fetch_latest_version!()
-    current_version =
-      Application.get_env(:tailwind, :version)
-
-    latest_version_url =
-      "https://api.github.com/repos/tailwindlabs/tailwindcss/releases/latest"
-
-    latest_version =
-      Req.get!(latest_version_url).body["tag_name"]
-      |> String.replace_prefix("v", "")
 
     if current_version !== latest_version do
       Mix.Shell.IO.info(
@@ -28,16 +21,7 @@ defmodule Mix.Tasks.Tailwind.UpdateVersion do
       config_file =
         Path.expand("config/config.exs", File.cwd!())
 
-      config_contents = File.read!(config_file)
+      Release.update_config_file!(config_file, current_version, latest_version)
-
-      new_config_contents =
-        String.replace(
-          config_contents,
-          ~s(version: "#{current_version}"),
-          "version: \"#{latest_version}\""
-        )
-
-      File.write!(config_file, new_config_contents)
     else
       Mix.Shell.IO.info("tailwind configuration is up to date (#{current_version})")
     end