1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
## 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) 2007-2023 Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. All rights reserved.
defmodule RabbitMQ.CLI.Core.Helpers do
alias RabbitMQ.CLI.Core.{Config, DataCoercion, NodeName}
require Record
def get_rabbit_hostname(node_name_type \\ :shortnames) do
normalise_node(Config.get_option(:node), node_name_type)
end
def normalise_node(nil, node_name_type) do
normalise_node(Config.get_option(:node), node_name_type)
end
def normalise_node(name, node_name_type) do
case NodeName.create(name, node_name_type) do
{:ok, node_name} -> node_name
other -> other
end
end
# rabbitmq/rabbitmq-cli#278
def normalise_node_option(options) do
node_opt = Config.get_option(:node, options)
longnames_opt = Config.get_option(:longnames, options)
case NodeName.create(node_opt, longnames_opt) do
{:error, _} = err ->
err
{:ok, val} ->
{:ok, Map.put(options, :node, val)}
end
end
def normalise_node_option(nil, _, _) do
nil
end
def normalise_node_option(node_opt, longnames_opt, options) do
case NodeName.create(node_opt, longnames_opt) do
{:error, _} = err ->
err
{:ok, val} ->
{:ok, Map.put(options, :node, val)}
end
end
def case_insensitive_format(%{format: format} = opts) do
%{opts | format: String.downcase(format)}
end
def case_insensitive_format(opts), do: opts
def nodes_in_cluster(node, timeout \\ :infinity) do
with_nodes_in_cluster(node, fn nodes -> nodes end, timeout)
end
def with_nodes_in_cluster(node, fun, timeout \\ :infinity) do
case :rpc.call(node, :rabbit_nodes, :list_running, [], timeout) do
{:badrpc, {:EXIT, {:undef, [{:rabbit_nodes, :list_running, [], []} | _]}}} ->
case :rpc.call(node, :rabbit_mnesia, :cluster_nodes, [:running], timeout) do
{:badrpc, _} = err -> err
value -> fun.(value)
end
{:badrpc, _} = err ->
err
value ->
fun.(value)
end
end
def cluster_member?(target_node, node_to_check, timeout \\ 30_000) do
node_to_check_a = DataCoercion.to_atom(node_to_check)
Enum.member?(nodes_in_cluster(target_node, timeout), node_to_check_a)
end
def node_running?(node) do
:net_adm.ping(node) == :pong
end
# Convert function to stream
def defer(fun) do
Stream.iterate(:ok, fn _ -> fun.() end)
|> Stream.drop(1)
|> Stream.take(1)
end
# Streamify a function sequence passing result
# Execution can be terminated by an error {:error, _}.
# The error will be the last element in the stream.
# Functions can return {:ok, val}, so val will be passed
# to then next function, or {:ok, val, output} where
# val will be passed and output will be put into the stream
def stream_until_error_parameterised(funs, init) do
Stream.transform(funs, {:just, init}, fn
f, {:just, val} ->
case f.(val) do
{:error, _} = err -> {[err], :nothing}
:ok -> {[], {:just, val}}
{:ok, new_val} -> {[], {:just, new_val}}
{:ok, new_val, out} -> {[out], {:just, new_val}}
end
_, :nothing ->
{:halt, :nothing}
end)
end
# Streamify function sequence.
# Execution can be terminated by an error {:error, _}.
# The error will be the last element in the stream.
def stream_until_error(funs) do
stream_until_error_parameterised(
Enum.map(
funs,
fn fun ->
fn :no_param ->
case fun.() do
{:error, _} = err -> err
other -> {:ok, :no_param, other}
end
end
end
),
:no_param
)
end
def atomize_values(map, keys) do
Enum.reduce(map, %{}, fn {k, v}, acc ->
case Enum.member?(keys, k) do
false -> Map.put(acc, k, v)
true -> Map.put(acc, k, DataCoercion.to_atom(v))
end
end)
end
def apply_if_exported(mod, fun, args, default) do
_ = Code.ensure_loaded(mod)
case function_exported?(mod, fun, length(args)) do
true -> apply(mod, fun, args)
false -> default
end
end
def cli_acting_user, do: "rmq-cli"
def string_or_inspect(val) do
case String.Chars.impl_for(val) do
nil ->
inspect(val)
_ ->
try do
to_string(val)
catch
_, _ -> inspect(val)
end
end
end
def evaluate_input_as_term(input) do
{:ok, tokens, _end_line} = :erl_scan.string(to_charlist(input <> "."))
{:ok, abs_form} = :erl_parse.parse_exprs(tokens)
{:value, term_value, _bs} = :erl_eval.exprs(abs_form, :erl_eval.new_bindings())
term_value
end
end
|
