# File lib/chef/chef_fs/path_utils.rb, line 42 def self.join(*parts) return "" if parts.length == 0 # Determine if it started with a slash absolute = parts[0].length == 0 || parts[0].length > 0 && parts[0] =~ /^#{regexp_path_separator}/ # Remove leading and trailing slashes from each part so that the join will work (and the slash at the end will go away) parts = parts.map { |part| part.gsub(/^\/|\/$/, "") } # Don't join empty bits result = parts.select { |part| part != "" }.join("/") # Put the / back on absolute ? "/#{result}" : result end
# File lib/chef/chef_fs/path_utils.rb, line 58 def self.regexp_path_separator Chef::ChefFS::windows? ? '[/\]' : '/' end
If you are in 'source', this is what you would have to type to reach 'dest' relative_to('/a/b/c/d/e', '/a/b/x/y') == '../../c/d/e' relative_to('/a/b', '/a/b') == "
# File lib/chef/chef_fs/path_utils.rb, line 28 def self.relative_to(dest, source) # Skip past the common parts source_parts = Chef::ChefFS::PathUtils.split(source) dest_parts = Chef::ChefFS::PathUtils.split(dest) i = 0 until i >= source_parts.length || i >= dest_parts.length || source_parts[i] != source_parts[i] i+=1 end # dot-dot up from 'source' to the common ancestor, then # descend to 'dest' from the common ancestor result = Chef::ChefFS::PathUtils.join(*(['..']*(source_parts.length-i) + dest_parts[i,dest.length-i])) result == '' ? '.' : result end
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