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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.Ctl.Commands.ImportDefinitionsCommand do
alias RabbitMQ.CLI.Core.{Config, DocGuide, ExitCodes, Helpers}
@behaviour RabbitMQ.CLI.CommandBehaviour
def merge_defaults(["-"] = args, opts) do
{args, Map.merge(%{format: "json", silent: true}, Helpers.case_insensitive_format(opts))}
end
def merge_defaults(args, opts) do
{args, Map.merge(%{format: "json"}, Helpers.case_insensitive_format(opts))}
end
def switches(), do: [timeout: :integer, format: :string]
def aliases(), do: [t: :timeout]
def validate(_, %{format: format})
when format != "json" and format != "JSON" and format != "erlang" do
{:validation_failure, {:bad_argument, "Format should be either json or erlang"}}
end
def validate(args, _) when length(args) > 1 do
{:validation_failure, :too_many_args}
end
def validate([path], _) do
case File.exists?(path, [raw: true]) do
true -> :ok
false -> {:validation_failure, {:bad_argument, "File #{path} does not exist"}}
end
end
def validate(_, _), do: :ok
use RabbitMQ.CLI.Core.RequiresRabbitAppRunning
def run([], %{node: node_name, format: format, timeout: timeout}) do
case IO.read(:stdio, :all) do
:eof -> {:error, :not_enough_args}
bin ->
case deserialise(bin, format) do
{:error, error} ->
{:error, ExitCodes.exit_dataerr(), "Failed to deserialise input (format: #{human_friendly_format(format)}) (error: #{inspect(error)})"}
{:ok, map} ->
:rabbit_misc.rpc_call(node_name, :rabbit_definitions, :import_parsed, [map], timeout)
end
end
end
def run([path], %{node: node_name, timeout: timeout, format: format}) do
abs_path = Path.absname(path)
case File.read(abs_path) do
{:ok, ""} ->
{:error, ExitCodes.exit_dataerr(), "File #{path} is zero-sized"}
{:ok, bin} ->
case deserialise(bin, format) do
{:error, error} ->
{:error, ExitCodes.exit_dataerr(), "Failed to deserialise input (format: #{human_friendly_format(format)}) (error: #{inspect(error)})"}
{:ok, map} ->
:rabbit_misc.rpc_call(node_name, :rabbit_definitions, :import_parsed, [map], timeout)
end
{:error, :enoent} ->
{:error, ExitCodes.exit_dataerr(), "Parent directory or file #{path} does not exist"}
{:error, :enotdir} ->
{:error, ExitCodes.exit_dataerr(), "Parent directory of file #{path} is not a directory"}
{:error, :eacces} ->
{:error, ExitCodes.exit_dataerr(), "No permissions to read from file #{path} or its parent directory"}
{:error, :eisdir} ->
{:error, ExitCodes.exit_dataerr(), "Path #{path} is a directory"}
{:error, err} ->
{:error, ExitCodes.exit_dataerr(), "Could not read from file #{path}: #{err}"}
end
end
def output(:ok, %{node: node_name, formatter: "json"}) do
{:ok, %{"result" => "ok", "node" => node_name}}
end
def output(:ok, opts) do
case Config.output_less?(opts) do
true -> :ok
false -> {:ok, "Successfully started definition import. " <>
"This process is asynchronous and can take some time.\n"}
end
end
use RabbitMQ.CLI.DefaultOutput
def printer(), do: RabbitMQ.CLI.Printers.StdIORaw
def usage, do: "import_definitions <file_path | \"-\"> [--format <json | erlang>]"
def usage_additional() do
[
["[file]", "Local file path to import from. If omitted will be read from standard input."],
["--format", "input format to use: json or erlang"]
]
end
def usage_doc_guides() do
[
DocGuide.definitions()
]
end
def help_section(), do: :definitions
def description(), do: "Imports definitions in JSON or compressed Erlang Term Format."
def banner([], %{format: fmt}) do
"Importing definitions in #{human_friendly_format(fmt)} from standard input ..."
end
def banner([path], %{format: fmt}) do
"Importing definitions in #{human_friendly_format(fmt)} from a file at \"#{path}\" ..."
end
#
# Implementation
#
defp deserialise(bin, "json") do
JSON.decode(bin)
end
defp deserialise(bin, "erlang") do
try do
{:ok, :erlang.binary_to_term(bin)}
rescue e in ArgumentError ->
{:error, e.message}
end
end
defp human_friendly_format("JSON"), do: "JSON"
defp human_friendly_format("json"), do: "JSON"
defp human_friendly_format("erlang"), do: "Erlang term format"
end
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