A Ruby backtrace nicely printed.
First, install it:
$ gem install backtrace
Then, use it like this, to print a backtrace:
require 'backtrace' begin # do something dangerous rescue StandardError => e puts .(e) end
A more compact version would use a block:
require 'backtrace' .(swallow: true) do # do something dangerous end
You can also provide a logging facility, to log the backtrace:
require 'backtrace' log = Log.new # it must implement method error(msg) .(swallow: true, log: log) do # do something dangerous end
Sometimes you may need to hide unimportant lines of the backtrace,
which are not related to your code base. You can use
of the constructor, which is a regular expression or a string. When it's met
in the backtrace, the printing will stop:
require 'backtrace' begin # do something dangerous rescue StandardError => e puts .(e, mine: 'yegor') end
(The MIT License)
Copyright (c) 2018 Yegor Bugayenko
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.