Add --quiet option for spec generation

lib/mix/tasks/openapi.spec.json.ex

@@ -20,6 +20,7 @@ defmodule Mix.Tasks.Openapi.Spec.Json do
   * `--vendor-extensions` - Whether to include open_api_spex OpenAPI vendor extensions
     (defaults to true)
 
+  * `--quiet` - Whether to disable output printing (defaults to false)
   """
   use Mix.Task
   require Mix.Generator

lib/mix/tasks/openapi.spec.yaml.ex

@@ -17,6 +17,7 @@ defmodule Mix.Tasks.Openapi.Spec.Yaml do
   * `--vendor-extensions` - Whether to include open_api_spex OpenAPI vendor extensions
     (defaults to true)
 
+  * `--quiet` - Whether to disable output printing (defaults to false)
   """
   use Mix.Task
   require Mix.Generator

lib/open_api_spex/export_spec.ex

@@ -7,7 +7,7 @@ defmodule OpenApiSpex.ExportSpec do
   defmodule Options do
     @moduledoc false
 
-    defstruct filename: nil, spec: nil, pretty: false, vendor_extensions: true
+    defstruct filename: nil, spec: nil, pretty: false, vendor_extensions: true, quiet: false
   end
 
   def call(argv, encode_spec, default_filename) do
@@ -16,7 +16,7 @@ defmodule OpenApiSpex.ExportSpec do
     opts
     |> generate_spec()
     |> encode_spec.(opts)
-    |> write_spec(opts.filename)
+    |> write_spec(opts)
   end
 
   defp generate_spec(%{spec: spec, vendor_extensions: vendor_extensions}) do
@@ -41,7 +41,13 @@ defmodule OpenApiSpex.ExportSpec do
 
   defp parse_options(argv, default_filename) do
     parse_options = [
-      strict: [spec: :string, endpoint: :string, pretty: :boolean, vendor_extensions: :boolean]
+      strict: [
+        spec: :string,
+        endpoint: :string,
+        pretty: :boolean,
+        vendor_extensions: :boolean,
+        quiet: :boolean
+      ]
     ]
 
     {opts, args, _} = OptionParser.parse(argv, parse_options)
@@ -50,17 +56,18 @@ defmodule OpenApiSpex.ExportSpec do
       filename: args |> List.first() || default_filename,
       spec: find_spec(opts),
       pretty: Keyword.get(opts, :pretty, false),
-      vendor_extensions: Keyword.get(opts, :vendor_extensions, true)
+      vendor_extensions: Keyword.get(opts, :vendor_extensions, true),
+      quiet: Keyword.get(opts, :quiet, false)
     }
   end
 
-  defp write_spec(content, filename) do
-    case Path.dirname(filename) do
+  defp write_spec(content, opts) do
+    case Path.dirname(opts.filename) do
       "." -> true
-      dir -> Mix.Generator.create_directory(dir)
+      dir -> Mix.Generator.create_directory(dir, quiet: opts.quiet)
     end
 
-    Mix.Generator.create_file(filename, content, force: true)
+    Mix.Generator.create_file(opts.filename, content, force: true, quiet: opts.quiet)
   end
 
   defp find_spec(opts) do

test/mix/tasks/openapi.spec.json_test.exs

@@ -18,4 +18,15 @@ defmodule Mix.Tasks.Openapi.Spec.JsonTest do
 
     assert File.read!(actual_schema_path) == File.read!(expected_schema_path)
   end
+
+  test "generates openapi.json quietly" do
+    Mix.Tasks.Openapi.Spec.Json.run(~w(
+      --quiet=true
+      --spec OpenApiSpexTest.Tasks.SpecModule
+      "tmp/openapi.json"
+    ))
+
+    refute_received {:mix_shell, :info, ["* creating tmp"]}
+    refute_received {:mix_shell, :info, ["* creating tmp/openapi.json"]}
+  end
 end