Class: DubyImpl

Inherits:
Object
  • Object
show all
Defined in:
lib/duby.rb

Instance Method Summary collapse

Instance Method Details

#compile(*args) ⇒ Object 



144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
 
# File 'lib/duby.rb', line 144

def compile(*args)
  process_flags!(args)

  expand_files(args).each do |duby_file|
    if duby_file == '-e'
      @filename = '-e'
      next
    elsif @filename == '-e'
      ast = parse('-e', duby_file)
    else
      ast = parse(duby_file)
    end
    exit 1 if @error

    compile_ast(ast) do |filename, builder|
      filename = "#{@state.destination}#{filename}"
      FileUtils.mkdir_p(File.dirname(filename))
      bytes = builder.generate
      File.open(filename, 'w') {|f| f.write(bytes)}
    end
    @filename = nil
  end
end

#compile_ast(ast, &block) ⇒ Object 



200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
 
# File 'lib/duby.rb', line 200

def compile_ast(ast, &block)
  typer = Duby::Typer::JVM.new(@filename, @transformer)
  typer.infer(ast)
  begin
    typer.resolve(false)
  ensure
    puts ast.inspect if @state.verbose

    failed = !typer.errors.empty?
    if failed
      puts "Inference Error:"
      typer.errors.each do |ex|
        Duby.print_error(ex.message, ex.node.position)
        puts ex.backtrace if @state.verbose
      end
      exit 1
    end
  end

  compiler = @compiler_class.new(@filename)
  ast.compile(compiler, false)
  compiler.generate(&block)
end

#expand_files(files) ⇒ Object 



280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
 
# File 'lib/duby.rb', line 280

def expand_files(files)
  expanded = []
  files.each do |filename|
    if File.directory?(filename)
      Dir[File.join(filename, '*')].each do |child|
        if File.directory?(child)
          files << child
        elsif child =~ /\.duby$/
          expanded << child
        end
      end
    else
      expanded << filename
    end
  end
  expanded
end

#parse(*args) ⇒ Object 



168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
 
# File 'lib/duby.rb', line 168

def parse(*args)
  process_flags!(args)
  @filename = args.shift

  if @filename
    if @filename == '-e'
      @filename = 'DashE'
      src = args[0]
    else
      src = File.read(@filename)
    end
  else
    print_help
    exit(1)
  end
  Duby::AST.type_factory = Duby::JVM::Types::TypeFactory.new(@filename)
  begin
    ast = Duby::AST.parse_ruby(src, @filename)
  rescue org.jrubyparser.lexer.SyntaxException => ex
    Duby.print_error(ex.message, ex.position)
    raise ex if @state.verbose
  end
  @transformer = Duby::Transform::Transformer.new(@state)
  ast = @transformer.transform(ast, nil)
  @transformer.errors.each do |ex|
    Duby.print_error(ex.message, ex.position)
    raise ex.cause || ex if @state.verbose
  end
  @error = @transformer.errors.size > 0
  ast
end

#print_help ⇒ Object 



269
270
271
272
273
274
275
276
277
278
 
# File 'lib/duby.rb', line 269

def print_help
  $stdout.print "#{$0} [flags] <files or \"-e SCRIPT\">
-V, --verbose\t\tVerbose logging
-j, --java\t\tOutput .java source (jrubyc only)
-d, --dir DIR\t\tUse DIR as the base dir for compilation, packages
-p, --plugin PLUGIN\tLoad and use plugin during compilation
-c, --classpath PATH\tAdd PATH to the Java classpath for compilation
-h, --help\t\tPrint this help message
-e\t\t\tCompile or run the script following -e (naming it \"DashE\")"
end

#process_flags!(args) ⇒ Object 



224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
 
# File 'lib/duby.rb', line 224

def process_flags!(args)
  @state ||= Duby::CompilationState.new
  while args.length > 0 && args[0] =~ /^-/
    case args[0]
    when '--verbose', '-V'
      Duby::Typer.verbose = true
      Duby::AST.verbose = true
      Duby::Compiler::JVM.verbose = true
      @state.verbose = true
      args.shift
    when '--java', '-j'
      require 'duby/jvm/source_compiler'
      @compiler_class = Duby::Compiler::JavaSource
      args.shift
    when '--dest', '-d'
      args.shift
      @state.destination = File.join(File.expand_path(args.shift), '')
    when '--cd'
      args.shift
      Dir.chdir(args.shift)
    when '--plugin', '-p'
      args.shift
      plugin = args.shift
      require "duby/plugin/#{plugin}"
    when '-I'
      args.shift
      $: << args.shift
    when '--classpath', '-c'
      args.shift
      Duby::Env.decode_paths(args.shift, $CLASSPATH)
    when '--help', '-h'
      print_help
      exit(0)
    when '-e'
      break
    else
      puts "unrecognized flag: " + args[0]
      print_help
      exit(1)
    end
  end
  @state.destination ||= File.join(File.expand_path('.'), '')
  @compiler_class ||= Duby::Compiler::JVM
end

#run(*args) ⇒ Object 



111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
 
# File 'lib/duby.rb', line 111

def run(*args)
  ast = parse(*args)
  main = nil
  class_map = {}

  # generate all bytes for all classes
  compile_ast(ast) do |outfile, builder|
    bytes = builder.generate
    name = builder.class_name.gsub(/\//, '.')
    class_map[name] = bytes
  end

  # load all classes
  dcl = DubyClassLoader.new(java.lang.ClassLoader.system_class_loader, class_map)
  class_map.each do |name,|
    cls = dcl.load_class(name)
    # TODO: using first main; find correct one
    main ||= cls.get_method("main", java::lang::String[].java_class) #rescue nil
  end

  # run the main method we found
  if main
    begin
      main.invoke(nil, [args.to_java(:string)].to_java)
    rescue java.lang.Exception => e
      e = e.cause if e.cause
      raise e
    end
  else
    puts "No main found"
  end
end