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# Because it's used by Sheller
require "open3"
require "logger"
require "guard/ui"
require "guard/internals/tracing"
module Guard
# @private api
module Internals
class Debugging
class << self
TRACES = [
[Kernel, :system],
[Kernel, :spawn],
[Kernel, :`],
[Open3, :popen3]
]
# Sets up debugging:
#
# * aborts on thread exceptions
# * Set the logging level to `:debug`
# * traces execution of Kernel.system and backtick calls
def start
return if @started ||= false
@started = true
Thread.abort_on_exception = true
UI.level = Logger::DEBUG
TRACES.each { |mod, meth| _trace(mod, meth, &method(:_notify)) }
@traced = true
end
def stop
return unless @started ||= false
UI.level = Logger::INFO
_reset
end
private
def _notify(*args)
UI.debug "Command execution: #{args.join(' ')}"
end
# reset singleton - called by tests
def _reset
@started = false
return unless @traced
TRACES.each { |mod, meth| _untrace(mod, meth) }
@traced = false
end
def _trace(mod, meth, &block)
Tracing.trace(mod, meth, &block)
end
def _untrace(mod, meth)
Tracing.untrace(mod, meth)
end
end
end
end
end
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