Improve Mix tasks

lib/mix/tasks/nabo.gen.post.ex

@@ -6,23 +6,31 @@ defmodule Mix.Tasks.Nabo.Gen.Post do
   @recursive true
 
   @moduledoc """
-  Generates a post.
+  Generates a post with the given path.
 
   ## Example
 
-      mix nabo.gen.post first-post
+      mix nabo.gen.post first-post --path priv/posts
+
+  ## Command line options
+
+  * `-p`, `--path` - the path where the posts locate
 
   """
 
   @doc false
   def run(args) do
-    case OptionParser.parse(args) do
-      {_, [slug], _} ->
+    switches = [path: :string]
+    aliases = [p: :path]
+
+    case OptionParser.parse(args, switches: switches, aliases: aliases) do
+      {options, [slug], _invalid} ->
+        root_path = Keyword.get(options, :root, "priv/posts/")
         datetime = DateTime.utc_now()
-        posts_path = "priv/posts"
-        path = Path.relative_to(posts_path, Mix.Project.app_path)
+        path = Path.relative_to(root_path, Mix.Project.app_path)
         file = Path.join(path, "#{format_datetime(datetime)}_#{slug}.md")
         create_file(file, post_template(slug: slug, datetime: datetime))
+
       _ ->
         Mix.raise "expected nabo.gen.post to receive post slug, " <>
                   "got: #{inspect(Enum.join(args, " "))}"

lib/mix/tasks/nabo.gen.repo.ex

@@ -23,6 +23,7 @@ defmodule Mix.Tasks.Nabo.Gen.Repo do
 
         create_directory(Path.dirname(file))
         create_file(file, repo_template(mod: repo))
+
       _ ->
         Mix.raise "expected nabo.gen.repo to receive repo name, " <>
                   "got: #{inspect Enum.join(args, " ")}"