This is a mirror of http://www.vim.org/scripts/script.php?script_id=2207

           Project with a tags file example:

           Open a long full path name from some error log

            vi /some/full/path/to/project/current_project/lib/module/file.ext
           ...

           :Relativize tags<cr>

           if you type :pwd you should get

           /some/full/path/to/project/current_project

           assuming a tags file has been created in the current_project
           file in the past.

           So hopefully this means tag jumps will work and relative
           include paths can be accessed via gf.

           This could also be useful for other landmark files on the
           system (eg. index.html, tags, .project,build.xml,README...etc). 
           In the above example
           using the actual file.ext as the argument will make the
           working directory the module directory

           The function will prioritise the deepest tags file.

            I have this in my vimrc to give you some ideas

            nnoremap ,pp :split<cr>:enew<cr>:r! tail -n 1000 /var/log/php_errorlog<cr>:set buftype=nofile<cr>Gf/
            nnoremap gft gf:Relativize tags<cr>
            nnoremap gfi gf:Relativize index.php<cr>

     Bugs:

           - Will probably not work with MS windows paths in current form.
           It will probably cause an infinite loop you will need to
           Ctrl-C out of.