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## This Source Code Form is subject to the terms of the Mozilla Public
## License, v. 2.0. If a copy of the MPL was not distributed with this
## file, You can obtain one at https://mozilla.org/MPL/2.0/.
##
## Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
defmodule RabbitMQ.CLI.Plugins.Commands.IsEnabledCommand do
alias RabbitMQ.CLI.Plugins.Helpers, as: PluginHelpers
alias RabbitMQ.CLI.Core.{DocGuide, Validators}
import RabbitMQ.CLI.Core.{CodePath, Paths}
@behaviour RabbitMQ.CLI.CommandBehaviour
def merge_defaults(args, %{offline: true} = opts) do
{args, opts}
end
def merge_defaults(args, opts) do
{args, Map.merge(%{online: true, offline: false}, opts)}
end
def distribution(%{offline: true}), do: :none
def distribution(%{offline: false}), do: :cli
def switches(), do: [online: :boolean, offline: :boolean]
def validate(_, %{online: true, offline: true}) do
{:validation_failure, {:bad_argument, "Cannot set both online and offline"}}
end
def validate(_, %{online: false, offline: false}) do
{:validation_failure, {:bad_argument, "Cannot set online and offline to false"}}
end
def validate([], _) do
{:validation_failure, :not_enough_args}
end
def validate([_ | _], _) do
:ok
end
def validate_execution_environment(args, %{offline: true} = opts) do
Validators.chain(
[
&require_rabbit_and_plugins/2,
&PluginHelpers.enabled_plugins_file/2,
&plugins_dir/2
],
[args, opts]
)
end
def validate_execution_environment(args, %{online: true} = opts) do
Validators.node_is_running(args, opts)
end
def run(args, %{online: true, node: node_name} = opts) do
case :rabbit_misc.rpc_call(node_name, :rabbit_plugins, :active, []) do
{:error, _} = e ->
e
plugins ->
plugins = Enum.map(plugins, &Atom.to_string/1) |> Enum.sort()
case Enum.filter(args, fn x -> not Enum.member?(plugins, x) end) do
[] -> {:ok, positive_result_message(args, opts)}
xs -> {:error, negative_result_message(xs, opts, plugins)}
end
end
end
def run(args, %{offline: true} = opts) do
plugins = PluginHelpers.list_names(opts) |> Enum.map(&Atom.to_string/1) |> Enum.sort()
case Enum.filter(args, fn x -> not Enum.member?(plugins, x) end) do
[] -> {:ok, positive_result_message(args, opts)}
xs -> {:error, negative_result_message(xs, opts, plugins)}
end
end
def output({:ok, msg}, %{formatter: "json"}) do
{:ok, %{"result" => "ok", "message" => msg}}
end
def output({:error, msg}, %{formatter: "json"}) do
{:error, RabbitMQ.CLI.Core.ExitCodes.exit_unavailable(),
%{"result" => "error", "message" => msg}}
end
def output({:error, err}, _opts) do
{:error, RabbitMQ.CLI.Core.ExitCodes.exit_unavailable(), err}
end
use RabbitMQ.CLI.DefaultOutput
def usage, do: "is_enabled <plugin1> [ <plugin2>] [--offline] [--online]"
def usage_additional() do
[
["<plugin1> [ <plugin2>]", "names of plugins to check separated by a space"],
["--online", "contact target node to perform the check. Requires the node to be running and reachable."],
["--offline", "check enabled plugins file directly without contacting target node."]
]
end
def usage_doc_guides() do
[
DocGuide.plugins()
]
end
def banner(args, %{offline: true}) do
"Inferring if #{plugin_or_plugins(args)} from local environment..."
end
def banner(args, %{online: true, node: node}) do
"Asking node #{node} if #{plugin_or_plugins(args)} enabled..."
end
def help_section(), do: :observability_and_health_checks
def description(), do: "Health check that exits with a non-zero code if provided plugins are not enabled on target node"
#
# Implementation
#
def plugin_or_plugins(args) when length(args) == 1 do
"plugin #{PluginHelpers.comma_separated_names(args)} is"
end
def plugin_or_plugins(args) when length(args) > 1 do
"plugins #{PluginHelpers.comma_separated_names(args)} are"
end
defp positive_result_message(args, %{online: true, node: node_name}) do
String.capitalize("#{plugin_or_plugins(args)} enabled on node #{node_name}")
end
defp positive_result_message(args, %{offline: true}) do
String.capitalize("#{plugin_or_plugins(args)} enabled")
end
defp negative_result_message(missing, %{online: true, node: node_name}, plugins) do
String.capitalize("#{plugin_or_plugins(missing)} not enabled on node #{node_name}. ") <>
"Enabled plugins and dependencies: #{PluginHelpers.comma_separated_names(plugins)}"
end
defp negative_result_message(missing, %{offline: true}, plugins) do
String.capitalize("#{plugin_or_plugins(missing)} not enabled. ") <>
"Enabled plugins and dependencies: #{PluginHelpers.comma_separated_names(plugins)}"
end
end
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