rubiii / how_it_works.md

Created December 02, 2012


    
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            $ rspec --format MacVimFormatter --color spec

          
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How it works

MacVim registers the mvim url handler to open files and directly jump to lines and columns.

We can use this to convert stacktraces reported by RSpec into clickable mvim-links.


MacVim

Requires at least MacVim 7.3. To change how MacVim opens external files go to

'Preferences' > 'Open files from applications' and select 'in the current window' and from

the dropdown menu select 'and set the arglist' to open the file in the last active buffer.


iTerm2

Cmd-Click on an mvim-link to open the file.

      
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      mac_vim_formatter.rb
    
    
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            require "rspec/core/formatters/progress_formatter"
 
class MacVimFormatter < RSpec::Core::Formatters::ProgressFormatter
 
  def dump_backtrace(example)
    format_backtrace(example.execution_result[:exception].backtrace, example.metadata).each do |backtrace_info|
      backtrace_split = backtrace_info.split(":")
 
      file = backtrace_split[0]       # the file
      file = file[2..-1]              # remove ./ from the beginning of the file
      file = File.join Dir.pwd, file  # create an absolute path
 
      line = backtrace_split[1]       # line number
      rest = backtrace_split[2..-1]   # the rest
 
      # output.puts cyan("#{long_padding}# #{backtrace_info}")
      output.puts cyan("#{long_padding}# mvim://open?url=file://#{file}&line=#{line} #{rest.join(':')}")
    end
  end
 
end