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log_reset
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Resets configured log files.
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lib/log/reset/config_paths.ex
defmodule Log.Reset.ConfigPaths do
@moduledoc """
Creates and clears configured log files.
"""
require Logger
@type levels :: :all | :none | [Logger.level()]
@type t :: %{Logger.level() => Path.t()}
@doc """
Creates and clears the configured log files of given `levels`.
"""
@spec clear_logs(t, levels) :: [:ok] | :ok
def clear_logs(config_paths, levels)
def clear_logs(config_paths, :all) do
for {_level, path} <- config_paths do
clear_log(path)
end
end
def clear_logs(_config_paths, :none), do: :ok
def clear_logs(config_paths, levels) when is_list(levels) do
for {level, path} <- config_paths, level in levels do
clear_log(path)
end
end
def clear_logs(_config_paths, _unknown), do: :ok
@doc """
Returns a list of configured log paths.
"""
@spec log_paths(t) :: [Path.t()]
def log_paths(config_paths) do
for {_level, path} <- config_paths do
path
end
end
@doc """
Returns a map of configured log paths.
"""
@spec new :: t
def new do
for config <- log_configs(), into: %{} do
{config[:level], config[:path]}
end
end
## Private functions
@spec clear_log(Path.t()) :: :ok
defp clear_log(log_path) do
log_path = Path.expand(log_path)
dir_path = Path.dirname(log_path)
create_dir(dir_path)
case File.write(log_path, "") do
:ok -> info("Cleared log file", log_path)
{:error, reason} -> error(reason, "Couldn't clear log file", log_path)
end
end
@spec log_configs :: [Keyword.t()]
defp log_configs do
:logger
|> :application.get_env(:backends, [])
|> Enum.map(fn
{LoggerFileBackend, id} -> :application.get_env(:logger, id, nil)
_console? -> nil
end)
|> Enum.reject(&is_nil/1)
end
@spec create_dir(Path.t()) :: :ok
defp create_dir(dir_path) do
case File.mkdir_p(dir_path) do
:ok -> :ok
{:error, reason} -> error(reason, "Couldn't create directory", dir_path)
end
end
@spec info(String.t(), Path.t()) :: :ok
defp info(msg, path) do
Logger.info("""
\n#{msg}:
#{inspect(path)}
""")
end
@spec error(File.posix(), String.t(), Path.t()) :: :ok
defp error(reason, msg, path) do
Logger.error("""
\n#{msg}:
#{inspect(path)}
#{:file.format_error(reason)}
""")
end
end