Logger#reopen

() -> self

(::Logger::logdev?) -> self

reopen(logdev = nil)

# File tmp/rubies/ruby-3.4.1/lib/logger.rb, line 624
def reopen(logdev = nil)
  @logdev&.reopen(logdev)
  self
end

Sets the logger’s output stream:

If logdev is nil, reopens the current output stream.
If logdev is a filepath, opens the indicated file for append.
If logdev is an IO stream (usually $stdout, $stderr, or an open File object), opens the stream for append.

Example:

Example

logger = Logger.new('t.log')
logger.add(Logger::ERROR, 'one')
logger.close
logger.add(Logger::ERROR, 'two') # Prints 'log writing failed. closed stream'
logger.reopen
logger.add(Logger::ERROR, 'three')
logger.close
File.readlines('t.log')
# =>
# ["# Logfile created on 2022-05-12 14:21:19 -0500 by logger.rb/v1.5.0\n",
#  "E, [2022-05-12T14:21:27.596726 #22428] ERROR -- : one\n",
#  "E, [2022-05-12T14:23:05.847241 #22428] ERROR -- : three\n"]

See also #log #sev_threshold #level_override #sev_threshold= also in 3.3 · 3.2 · 3.1 · 3.0

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