change mix cmd to use --app instead of --only (#5220)

2 files changed, 4 insertions, 4 deletions

diff --git a/lib/mix/lib/mix/tasks/cmd.ex b/lib/mix/lib/mix/tasks/cmd.ex
index 875efa8d1..7e755188e 100644
--- a/lib/mix/lib/mix/tasks/cmd.ex
+++ b/lib/mix/lib/mix/tasks/cmd.ex
@@ -13,9 +13,9 @@ defmodule Mix.Tasks.Cmd do
       mix cmd echo pwd
 
   You can limit which apps the cmd runs in by passing the app names
-  before the cmd using --only:
+  before the cmd using --app:
 
-      mix cmd --only app1 --only app2 echo pwd
+      mix cmd --app app1 --app app2 echo pwd
 
   Aborts when a command exits with a non-zero status.
   """
@@ -33,7 +33,7 @@ defmodule Mix.Tasks.Cmd do
 
   defp parse_apps(args, apps) do
     case args do
-      ["--only", app | tail] ->
+      ["--app", app | tail] ->
         parse_apps(tail, [String.to_atom(app) | apps])
       args -> {args, apps}
     end
diff --git a/lib/mix/test/mix/tasks/cmd_test.exs b/lib/mix/test/mix/tasks/cmd_test.exs
index 35fd9327f..14a116a2e 100644
--- a/lib/mix/test/mix/tasks/cmd_test.exs
+++ b/lib/mix/test/mix/tasks/cmd_test.exs
@@ -19,7 +19,7 @@ defmodule Mix.Tasks.CmdTest do
   test "only run the cmd for specified apps" do
     in_fixture "umbrella_dep/deps/umbrella", fn ->
       Mix.Project.in_project(:umbrella, ".", fn _ ->
-        Mix.Task.run "cmd", ["--only", "bar", "echo", "hello"]
+        Mix.Task.run "cmd", ["--app", "bar", "echo", "hello"]
         nl = os_newline()
         assert_received {:mix_shell, :info, ["==> bar"]}
         assert_received {:mix_shell, :run, ["hello" <> ^nl]}