1
0
Fork 0
mirror of https://github.com/rails/rails.git synced 2022-11-09 12:12:34 -05:00
rails--rails/railties/lib/rails/rack/log_tailer.rb

33 lines
702 B
Ruby

module Rails
module Rack
class LogTailer
def initialize(app, log = nil)
@app = app
path = Pathname.new(log || "#{File.expand_path(Rails.root)}/log/#{Rails.env}.log").cleanpath
@cursor = ::File.size(path)
@last_checked = Time.now.to_f
@file = ::File.open(path, 'r')
end
def call(env)
response = @app.call(env)
tail!
response
end
def tail!
@file.seek @cursor
mod = @file.mtime.to_f
if mod > @last_checked
contents = @file.read
@last_checked = mod
@cursor += contents.size
$stdout.print contents
end
end
end
end
end