See #5957. Accept empty arg and prompt for password

(cherry picked from commit 03617f6)

Author: SimonUnge

deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/hash_password_command.ex

@@ -5,30 +5,40 @@
 ## Copyright (c) 2007-2023 VMware, Inc. or its affiliates.  All rights reserved.
 
 defmodule RabbitMQ.CLI.Ctl.Commands.HashPasswordCommand do
+  alias RabbitMQ.CLI.Core.{Input}
   @behaviour RabbitMQ.CLI.CommandBehaviour
-
   use RabbitMQ.CLI.Core.MergesNoDefaults
 
   def run([cleartextpassword], %{node: node_name}) do
-    r =
+    hash_password(cleartextpassword, node_name)
+  end
+
+  def run([], %{node: node_name} = opts) do
+    case Input.infer_password("Password: ", opts) do
+      :eof ->
+        {:error, :not_enough_args}
+
+      password ->
+        hash_password(password, node_name)
+    end
+  end
+
+  def hash_password(password, node_name) do
+    hashed_pwd =
       :rabbit_misc.rpc_call(
         node_name,
         :rabbit_password,
         :hash,
-        [cleartextpassword]
+        [password]
       )
 
-    Base.encode64(r)
+    Base.encode64(hashed_pwd)
   end
 
   def validate(args, _options) when length(args) > 1 do
     {:validation_failure, :too_many_args}
   end
 
-  def validate(args, _options) when length(args) < 1 do
-    {:validation_failure, :not_enough_args}
-  end
-
   def validate([""], _options) do
     {:bad_argument, "password cannot be an empty string"}
   end
@@ -37,10 +47,17 @@ defmodule RabbitMQ.CLI.Ctl.Commands.HashPasswordCommand do
     :ok
   end
 
+  def validate([], _options) do
+    :ok
+  end
+
   use RabbitMQ.CLI.DefaultOutput
 
   def usage, do: "hash_password <cleartext_password>"
 
   def banner([arg], _options),
     do: "Will hash password #{arg}"
+
+  def banner([], _options),
+    do: "Will hash provided password"
 end

deps/rabbitmq_cli/test/ctl/hash_password_command_test.exs

@@ -25,10 +25,6 @@ defmodule HashPasswordCommandTest do
              {:validation_failure, :too_many_args}
   end
 
-  test "validate: too few arguments", context do
-    assert @command.validate([], context[:opts]) == {:validation_failure, :not_enough_args}
-  end
-
   test "validate: empty string", context do
     assert @command.validate([""], context[:opts]) ==
              {:bad_argument, "password cannot be an empty string"}