tiny and the simplest implementation of eRuby
ex.
eruby = TinyEruby.new(File.read('example.rhtml')) print eruby.src # print ruby code print eruby.result(binding()) # eval ruby code with Binding object print eruby.evalute(context) # eval ruby code with context object
# File lib/erubis/tiny.rb, line 26 26: def convert(input) 27: src = "_buf = '';" # preamble 28: pos = 0 29: input.scan(EMBEDDED_PATTERN) do |indicator, code| 30: m = Regexp.last_match 31: text = input[pos...m.begin(0)] 32: pos = m.end(0) 33: #src << " _buf << '" << escape_text(text) << "';" 34: text.gsub!(/['\\]/, '\\\&') 35: src << " _buf << '" << text << "';" unless text.empty? 36: if !indicator # <% %> 37: src << code << ";" 38: elsif indicator == '#' # <%# %> 39: src << ("\n" * code.count("\n")) 40: else # <%= %> 41: src << " _buf << (" << code << ").to_s;" 42: end 43: end 44: #rest = $' || input # ruby1.8 45: rest = pos == 0 ? input : input[pos..1] # ruby1.9 46: #src << " _buf << '" << escape_text(rest) << "';" 47: rest.gsub!(/['\\]/, '\\\&') 48: src << " _buf << '" << rest << "';" unless rest.empty? 49: src << "\n_buf.to_s\n" # postamble 50: return src 51: end
# File lib/erubis/tiny.rb, line 61 61: def evaluate(_context=Object.new) 62: if _context.is_a?(Hash) 63: _obj = Object.new 64: _context.each do |k, v| _obj.instance_variable_set("@#{k}", v) end 65: _context = _obj 66: end 67: _context.instance_eval @src 68: end
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