Class: Opal::CliRunners::Compiler

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 11
def initialize(data)
 @options = data[:options] || {}
 @builder_factory = data.fetch(:builder)
 @map_file = @options[:map_file]
 @output = data.fetch(:output)
 @watch = @options[:watch]
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 7
def self.call(data)
 new(data).start
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 19
def compile
 builder = @builder_factory.call
 compiled_source = builder.to_s
 compiled_source += "\n" + builder.source_map.to_data_uri_comment unless @options[:no_source_map]
 rewind_output if @watch
 @output.puts compiled_source
 @output.flush
 File.write(@map_file, builder.source_map.to_json) if @map_file
 builder
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 34
def compile_noraise
 compile
rescue StandardError, Opal ::SyntaxError  => e
 $stderr.puts "* Compilation failed: #{e.message}"
 nil
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 61
def fail_no_listen!
 abort <<~ERROR
 --watch mode requires the `listen` gem present. Please try to run:
 gem install listen
 Or if you are using bundler, add listen to your Gemfile.
 ERROR
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 54
def fail_unrewindable!
 abort <<~ERROR
 You have specified --watch, but for watch to work, you must specify an
 --output file.
 ERROR
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 118
def files_to_directories
 directories = @files.map { |file| File.dirname(file) }.uniq
 previous_dir = nil
 # Only get the topmost directories
 directories = directories.sort.map do |dir|
 if previous_dir && dir.start_with?(previous_dir + '/')
 nil
 else
 previous_dir = dir
 end
 end
 directories.compact
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 98
def on_code_change(modified)
 if !(modified & @opal_deps).empty?
 $stderr.puts "* Modified core Opal files: #{modified.join(', ')}; reexecuting"
 reexec
 elsif !modified.all? { |file| @directories.any? { |dir| file.start_with?(dir + '/') } }
 $stderr.puts "* New unwatched files: #{modified.join(', ')}; reexecuting"
 reexec
 end
 $stderr.puts "* Modified code: #{modified.join(', ')}; rebuilding"
 builder = compile_noraise
 # Ignore the bad compilation
 if builder
 code_deps = builder.dependent_files
 @files = @opal_deps + code_deps
 end
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 94
def reexec
 Process.kill('USR2', Process.pid)
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 41
def rewind_output
 if !@output.is_a?(File) || @output.tty?
 fail_unrewindable!
 else
 begin
 @output.rewind
 @output.truncate(0)
 rescue Errno::ESPIPE
 fail_unrewindable!
 end
 end
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 143
def start
 if @watch
 watch_compile
 else
 compile
 end
 0
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 71
def watch_compile
 begin
 require 'listen'
 rescue LoadError
 fail_no_listen!
 end
 @opal_deps = Opal .dependent_files 
 builder = compile
 code_deps = builder.dependent_files
 @files = @opal_deps + code_deps
 @code_listener = watch_files
 @code_listener.start
 $stderr.puts "* Opal v#{Opal ::VERSION } successfully compiled your program in --watch mode"
 sleep
rescue Interrupt
 $stderr.puts '* Stopping watcher...'
 @code_listener.stop
end

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# File 'opal/lib/opal/cli_runners/compiler.rb', line 134
def watch_files
 @directories = files_to_directories
 Listen.to(*@directories, ignore!: []) do |modified, added, removed|
 our_modified = @files & (modified + added + removed)
 on_code_change(our_modified) unless our_modified.empty?
 end
end