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defmodule Coruscant.ConfigLogger do | |
require Logger | |
@secret_matcher ~r/key|secret|salt|encryption|password|connection_string|creds/ | |
defp secrets_masker(k, v) do | |
s = | |
if is_atom(k) do | |
Atom.to_string(k) | |
else | |
k | |
end | |
if is_binary(v) && | |
is_binary(s) && | |
Regex.match?(@secret_matcher, s) do | |
{k, ((v || "") |> String.first()) <> "*****"} | |
else | |
{k, v} | |
end | |
end | |
defp deep_transform(data) do | |
cond do | |
is_tuple(data) && tuple_size(data) == 2 -> | |
{k, v} = data | |
if is_binary(v) do | |
{k, secrets_masker(k, v)} | |
else | |
{k, deep_transform(v)} | |
end | |
is_struct(data) && data.__struct__ in [Regex, DateTime, NaiveDateTime, Time] -> | |
data | |
is_struct(data) -> | |
type = data.__struct__ | |
data | |
|> Map.drop([:__struct__]) | |
|> map_transform() | |
|> Map.put(:__struct__, type) | |
is_map(data) -> | |
map_transform(data) | |
is_map(data) || is_struct(data) -> | |
Enum.reduce(data, %{}, fn {k, v}, acc -> | |
if is_binary(v) do | |
Map.put(acc, k, secrets_masker(k, v)) | |
else | |
Map.put(acc, k, deep_transform(v)) | |
end | |
end) | |
is_list(data) -> | |
Enum.map(data, fn value -> deep_transform(value) end) | |
true -> | |
data | |
end | |
end | |
defp map_transform(map), | |
do: | |
Enum.reduce(map, %{}, fn {k, v}, acc -> | |
if is_binary(v) do | |
Map.put(acc, k, secrets_masker(k, v)) | |
else | |
Map.put(acc, k, deep_transform(v)) | |
end | |
end) | |
def log_all_applicaion_config(my_app) do | |
try do | |
conf = | |
([{my_app, "Top level"}] ++ Application.started_applications()) | |
|> Enum.map(&elem(&1, 0)) | |
|> Enum.map(fn app -> {app, Application.get_all_env(app)} end) | |
|> Enum.reject(fn {_app, conf} -> Enum.empty?(conf) end) | |
|> Enum.map(fn {app, v} -> {app, deep_transform(v)} end) | |
|> inspect(pretty: true) | |
Logger.info("My configuration is #{conf}") | |
rescue | |
ex -> | |
Logger.warn("Problem logging out config #{Exception.format(:error, ex, __STACKTRACE__)}") | |
end | |
end | |
end |
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