[英]How to log everything on the screen to a file?
I use one rb file with rufus/scheduler
on Windows. 我在Windows上使用
rufus/scheduler
使用一个rb文件。 The script is executed on a comupter start up and it runs in a cmd window. 该脚本在计算机启动时执行,并在cmd窗口中运行。
How can I log everything that ruby outputs to the screen to a file? 如何将ruby输出到屏幕的所有内容记录到文件中? I still want to be able to see the output on the screen.
我仍然希望能够在屏幕上看到输出。 So I want the logging on top of current behaviour.
所以我想记录当前行为。
If you just want the script to send output to the file instead of the console use IO#reopen
to redirect stdout and stderr. 如果只希望脚本将输出发送到文件而不是控制台,请使用
IO#reopen
重定向stdout和stderr。
def redirect_console(filename)
$stdout.reopen(filename,'w')
$stderr.reopen(filename,'w')
end
redirect_console('/my/console/output/file')
If you need to direct to one or more output streams, use a proxy object and method_missing to send to them 如果您需要定向到一个或多个输出流,请使用代理对象和method_missing发送给它们
class TeeIO
def initialize(*streams)
raise ArgumentError, "Can only tee to IO objects" unless streams.all? { |e| e.is_a? IO }
@streams = streams
end
def method_missing(meth, *args)
# HACK only returns result of first stream
@streams.map {|io| io.send(meth, *args) }.first
end
def respond_to_missing?(meth, include_all)
@streams.all? {|io| io.respond_to?(meth, include_all) }
end
end
def tee_console(filename)
tee_to = File.open(filename, 'w')
tee_to.sync = true # flush after each write
$stdout = TeeIO.new($stdout, tee_to)
$stderr = TeeIO.new($stderr, tee_to)
end
tee_console('/my/console/output/file')
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