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bt.rb
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bt.rb
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require "digest/md5"
module BT
module_function
if ENV.key?("BT_INIT")
def start(name)
return if ENV.key?("BT_DISABLED") and ENV["BT_DISABLED"] != "0"
caller, desc_checksum, timestamp = _metadata(name)
file = "#{ENV["BT_DIR"]}/#{desc_checksum}.#{timestamp}"
file_alias = "#{ENV["BT_DIR"]}/#{desc_checksum}"
File.write(file, "#{caller} #{name}\n")
File.symlink(file, file_alias)
end
def end(name)
return if ENV.key?("BT_DISABLED") and ENV["BT_DISABLED"] != "0"
caller, desc_checksum, timestamp = _metadata(name)
File.open("#{ENV["BT_DIR"]}/#{desc_checksum}", 'a') do |f|
f.puts("#{timestamp} #{caller} #{name}")
end
end
def _metadata(name)
caller = /([[:alnum:]\.\/\-]+\:[[:digit:]]+)/.match(caller_locations(1, 1)[0].to_s)[0]
desc_checksum = Digest::MD5.hexdigest(name)
time = Time.now
timestamp = "#{time.to_i}#{time.nsec}".ljust(19, '0')
[caller, desc_checksum, timestamp]
end
else
def start(name)
end
def end(name)
end
end
def time(name)
self.start(name)
yield
ensure
self.end(name)
end
end