Add an interactive console

Also moves `bin/ruby2d` functionality to new `lib/ruby2d/cli` dir

5 files changed, 307 insertions, 0 deletions

diff --git a/lib/ruby2d/cli/build.rb b/lib/ruby2d/cli/build.rb
new file mode 100644
index 0000000..92e68f7
--- /dev/null
+++ b/lib/ruby2d/cli/build.rb
@@ -0,0 +1,181 @@
+# Build a Ruby 2D app natively and for the web
+
+require 'fileutils'
+
+# The installed gem directory
+@gem_dir = "#{Gem::Specification.find_by_name('ruby2d').gem_dir}"
+
+# The Ruby 2D library files
+@lib_files = [
+  'renderable',
+  'exceptions',
+  'color',
+  'window',
+  'dsl',
+  'quad',
+  'line',
+  'circle',
+  'rectangle',
+  'square',
+  'triangle',
+  'image',
+  'sprite',
+  'font',
+  'text',
+  'sound',
+  'music'
+]
+
+
+# Check if source file provided is good
+def check_build_src_file(rb_file)
+  if !rb_file
+    puts "Please provide a Ruby file to build"
+    exit
+  elsif !File.exist? rb_file
+    puts "Can't find file: #{rb_file}"
+    exit
+  end
+end
+
+
+# Assemble the Ruby 2D library in one `.rb` file
+def make_lib
+  FileUtils.mkdir_p 'build'
+
+  lib_dir = "#{@gem_dir}/lib/ruby2d/"
+
+  lib = ""
+  @lib_files.each do |f|
+    lib << File.read("#{lib_dir + f}.rb") + "\n\n"
+  end
+
+  lib << "
+include Ruby2D
+extend  Ruby2D::DSL\n"
+
+  File.write('build/lib.rb', lib)
+end
+
+
+# Remove `require 'ruby2d'` from source file
+def strip_require(file)
+  output = ''
+  File.foreach(file) do |line|
+    output << line unless line =~ /require ('|")ruby2d('|")/
+  end
+  return output
+end
+
+
+# Build a native version of the provided Ruby application
+def build_native(rb_file)
+  check_build_src_file(rb_file)
+
+  # Check if MRuby exists; if not, quit
+  if `which mruby`.empty?
+    puts "#{'Error:'.error} Can't find MRuby, which is needed to build native Ruby 2D applications.\n"
+    exit
+  end
+
+  # Add debugging information to produce backtrace
+  if @debug then debug_flag = '-g' end
+
+  # Assemble the Ruby 2D library in one `.rb` file and compile to bytecode
+  make_lib
+  `mrbc #{debug_flag} -Bruby2d_lib -obuild/lib.c build/lib.rb`
+
+  # Read the provided Ruby source file, copy to build dir and compile to bytecode
+  File.open('build/src.rb', 'w') { |file| file << strip_require(rb_file) }
+  `mrbc #{debug_flag} -Bruby2d_app -obuild/src.c build/src.rb`
+
+  # Combine contents of C source files and bytecode into one file
+  open('build/app.c', 'w') do |f|
+    f << "#define MRUBY 1" << "\n\n"
+    f << File.read("build/lib.c") << "\n\n"
+    f << File.read("build/src.c") << "\n\n"
+    f << File.read("#{@gem_dir}/ext/ruby2d/ruby2d.c")
+  end
+
+  # Compile to a native executable
+  `cc build/app.c -lmruby \`simple2d --libs\` -o build/app`
+
+  # Clean up
+  clean_up unless @debug
+
+  # Success!
+  puts "Native app created at `build/app`"
+end
+
+
+# Build a web-based version of the provided Ruby application
+def build_web(rb_file)
+  puts "Warning: ".warn + "This feature is currently disabled while it's being upgraded."
+end
+
+
+# Build an iOS or tvOS app
+def build_apple(rb_file, device)
+  check_build_src_file(rb_file)
+
+  # Check for Simple 2D framework,
+  unless File.exist?('/usr/local/Frameworks/Simple2D/iOS/Simple2D.framework') && File.exist?('/usr/local/Frameworks/Simple2D/tvOS/Simple2D.framework')
+    puts "#{'Error:'.error} Simple 2D iOS and tvOS frameworks not found. Install them and try again.\n"
+    exit
+  end
+
+  # Check if MRuby exists; if not, quit
+  if `which mruby`.empty?
+    puts "#{'Error:'.error} Can't find MRuby, which is needed to build native Ruby 2D applications.\n"
+    exit
+  end
+
+  # Add debugging information to produce backtrace
+  if @debug then debug_flag = '-g' end
+
+  # Assemble the Ruby 2D library in one `.rb` file and compile to bytecode
+  make_lib
+  `mrbc #{debug_flag} -Bruby2d_lib -obuild/lib.c build/lib.rb`
+
+  # Read the provided Ruby source file, copy to build dir and compile to bytecode
+  File.open('build/src.rb', 'w') { |file| file << strip_require(rb_file) }
+  `mrbc #{debug_flag} -Bruby2d_app -obuild/src.c build/src.rb`
+
+  # Copy over iOS project
+  FileUtils.cp_r "#{@gem_dir}/assets/#{device}", "build"
+
+  # Combine contents of C source files and bytecode into one file
+  File.open("build/#{device}/main.c", 'w') do |f|
+    f << "#define RUBY2D_IOS_TVOS 1" << "\n\n"
+    f << "#define MRUBY 1" << "\n\n"
+    f << File.read("build/lib.c") << "\n\n"
+    f << File.read("build/src.c") << "\n\n"
+    f << File.read("#{@gem_dir}/ext/ruby2d/ruby2d.c")
+  end
+
+  # Build the Xcode project
+  `simple2d build --#{device} build/#{device}/MyApp.xcodeproj`
+
+  # Clean up
+  clean_up unless @debug
+
+  # Success!
+  puts "App created at `build/#{device}`"
+end
+
+
+# Clean up unneeded build files
+def clean_up(cmd = nil)
+  FileUtils.rm(
+    Dir.glob('build/{src,lib}.{rb,c,js}') +
+    Dir.glob('build/app.c')
+  )
+  if cmd == :all
+    puts "cleaning up..."
+    FileUtils.rm_f 'build/app'
+    FileUtils.rm_f 'build/app.js'
+    FileUtils.rm_f 'build/app.html'
+    FileUtils.rm_rf 'build/ios'
+    FileUtils.rm_rf 'build/tvos'
+  end
+end
diff --git a/lib/ruby2d/cli/console.rb b/lib/ruby2d/cli/console.rb
new file mode 100644
index 0000000..b30570d
--- /dev/null
+++ b/lib/ruby2d/cli/console.rb
@@ -0,0 +1,49 @@
+rb_file = ARGV[1]
+
+# Check if source file provided is good
+if !rb_file
+  puts "Provide a Ruby file to run"
+  exit 1
+elsif !File.exist? rb_file
+  puts "Can't find file: #{rb_file}"
+  exit 1
+end
+
+# Add libraries
+require 'open3'
+require 'readline'
+require 'io/wait'
+
+line = 1  # the current line number, to be incremented
+
+# Open a new process for the  Ruby file
+stdin, stdout, stderr, wait_thr = Open3.popen3("ruby -r 'ruby2d/cli/enable_console' #{rb_file}")
+
+loop do
+
+  # Read the next command
+  cmd = Readline.readline("ruby2d:#{line}> ", true)
+
+  # Quit if command is 'exit'
+  if cmd == 'exit'
+    Process.kill 'INT', wait_thr.pid
+    wait_thr.value
+    exit
+  end
+
+  # Skip if command is an empty string
+  unless cmd.empty?
+
+    # Send command to the Ruby file
+    stdin.puts cmd
+
+    # Read and print output from the Ruby file
+    puts stdout.gets
+    while stdout.ready? do
+      puts stdout.gets
+    end
+  end
+
+  # Advance to next line
+  line += 1
+end
diff --git a/lib/ruby2d/cli/enable_console.rb b/lib/ruby2d/cli/enable_console.rb
new file mode 100644
index 0000000..8b2d3cd
--- /dev/null
+++ b/lib/ruby2d/cli/enable_console.rb
@@ -0,0 +1,5 @@
+# Enable the interactive console
+
+require 'io/wait'
+
+$ruby2d_console_mode = true
diff --git a/lib/ruby2d/cli/launch.rb b/lib/ruby2d/cli/launch.rb
new file mode 100644
index 0000000..ff09873
--- /dev/null
+++ b/lib/ruby2d/cli/launch.rb
@@ -0,0 +1,50 @@
+# Launch a built Ruby 2D app
+
+# Launch a native app
+def launch_native
+  if !File.exist? 'build/app'
+    puts "No native app built!"
+    exit
+  end
+  `( cd build && ./app )`
+end
+
+
+# Launch a web app
+def launch_web
+  if !File.exist? 'build/app.html'
+    puts "No web app built!"
+    exit
+  end
+  open_cmd = 'open'
+  case RUBY_PLATFORM
+  when /linux/
+    open_cmd = "xdg-#{open_cmd}"
+  when /mingw/
+    open_cmd = "start"
+  end
+  system "#{open_cmd} build/app.html"
+end
+
+
+# Launch an iOS or tvOS app in a simulator
+def launch_apple(device)
+  case device
+  when 'ios'
+    if !File.exist? 'build/ios/build/Release-iphonesimulator/MyApp.app'
+      puts "No iOS app built!"
+      exit
+    end
+    puts `simple2d simulator --open "iPhone XR" &&
+          simple2d simulator --install "build/ios/build/Release-iphonesimulator/MyApp.app" &&
+          simple2d simulator --launch "Ruby2D.MyApp"`
+  when 'tvos'
+    if !File.exist? 'build/tvos/build/Release-appletvsimulator/MyApp.app'
+      puts "No tvOS app built!"
+      exit
+    end
+    puts `simple2d simulator --open "Apple TV 4K" &&
+          simple2d simulator --install "build/tvos/build/Release-appletvsimulator/MyApp.app" &&
+          simple2d simulator --launch "Ruby2D.MyApp"`
+  end
+end
diff --git a/lib/ruby2d/window.rb b/lib/ruby2d/window.rb
index e08d13c..7db80a9 100644
--- a/lib/ruby2d/window.rb
+++ b/lib/ruby2d/window.rb
@@ -85,6 +85,9 @@ module Ruby2D
 
       # Whether diagnostic messages should be printed
       @diagnostics = false
+
+      # Console mode, enabled at command line
+      @console = $ruby2d_console_mode || false
     end
 
     # Class methods for convenient access to properties
@@ -354,6 +357,25 @@ module Ruby2D
     # Update callback method, called by the native and web extentions
     def update_callback
       @update_proc.call
+
+      # Accept and eval commands if in console mode
+      if @console
+        if STDIN.ready?
+          cmd = STDIN.gets
+          begin
+            res = eval(cmd, TOPLEVEL_BINDING)
+            STDOUT.puts "=> #{res.inspect}"
+            STDOUT.flush
+          rescue SyntaxError => se
+            STDOUT.puts se
+            STDOUT.flush
+          rescue Exception => e
+            STDOUT.puts e
+            STDOUT.flush
+          end
+        end
+      end
+
     end
 
     # Show the window