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require "logger"
module Neovim
# Mixed into classes for unified logging helper methods.
#
# @api private
module Logging
TIMESTAMP_FORMAT = "%Y-%m-%dT%H:%M:%S.%6N".freeze
# Return the value of @logger, or construct it from the environment.
# $NVIM_RUBY_LOG_FILE specifies a file to log to (default +STDERR+), while
# $NVIM_RUBY_LOG_LEVEL specifies the level (default +WARN+)
def self.logger(env=ENV)
return @logger if instance_variable_defined?(:@logger)
env_file, env_level =
env.values_at("NVIM_RUBY_LOG_FILE", "NVIM_RUBY_LOG_LEVEL")
@logger = Logger.new(env_file || STDERR)
if /\S+/.match?(env_level)
begin
@logger.level = Integer(env_level)
rescue ArgumentError
@logger.level = Logger.const_get(env_level.upcase)
end
else
@logger.level = Logger::WARN
end
@logger.formatter = json_formatter
@logger
end
def self.logger=(logger)
logger.formatter = json_formatter
@logger = logger
end
def self.included(base)
base.send(:include, Helpers)
end
def self.json_formatter
lambda do |level, time, _, fields|
require "multi_json"
MultiJson.encode(
{
_level: level,
_time: time.strftime(TIMESTAMP_FORMAT)
}.merge!(fields)
) << "\n"
end
end
private_class_method :json_formatter
# @api private
module Helpers
private
def log(level, method=nil, &block)
begin
Logging.logger.public_send(level) do
{
_class: self.class,
_method: method || block.binding.eval("__method__")
}.merge!(yield)
end
rescue => ex
Logging.logger.error("failed to log: #{ex.inspect}")
end
rescue
# Inability to log shouldn't abort process
end
def log_exception(level, ex, method)
log(level, method) do
{exception: ex.class, message: ex.message}
end
log(:debug, method) do
{exception: ex.class, message: ex.message, backtrace: ex.backtrace}
end
end
end
end
end
|
