Add propane and initial skeleton grammar

.gitignore

@@ -1,5 +1,6 @@
-/fart
 *.bmp
 *.png
+/.propane*
 /.rscons*
 /build/
+/fart

Rsconscript

@@ -3,10 +3,25 @@ configure do
   check_cfg package: "libpng"
 end
 
-env do |env|
+class Propane < Builder
-  env["CCFLAGS"] += %w[-Wall -O2 -std=c++23]
+  def run(options)
-  env["CPPPATH"] += %w[src]
+    @sources += ["propane"] unless @sources.include?("propane")
+    if @command
+      finalize_command
+    else
+      command = %W[./propane -w --log #{@target}.log #{@sources.first} #{@target}]
+      standard_command("Propane <target>#{@target}<reset>", command, options)
+    end
+  end
+end
 
-  sources = glob("src/**/*.cpp")
+env do |env|
+  env.add_builder(Propane)
+  env["CCFLAGS"] += %w[-Wall -O2 -std=c++23]
+  env["CPPPATH"] += %W[src #{env.build_root}/src]
+
+  env.Propane("^/src/propane.cpp", "src/fart.propane")
+  env.barrier
+  sources = glob("src/**/*.cpp") + ["#{env.build_root}/src/propane.cpp"]
   env.Program("fart", sources)
 end

propane

@@ -0,0 +1,45 @@
+#!/usr/bin/env ruby
+
+# The MIT License (MIT)
+#
+# Copyright (c) 2010-2026 Josh Holtrop
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+
+script = File.join(File.dirname(__FILE__), ".propane-5.2.0-58c963344c9bc893689cbae5e4c49b1b.rb")
+unless File.exist?(script)
+  if File.read(__FILE__, mode: "rb") =~ /^#==>(.*)/
+    require "zlib"
+    require "base64"
+    encoded_compressed = $1
+    unescaped_compressed = Base64.decode64(encoded_compressed)
+    inflated = Zlib::Inflate.inflate(unescaped_compressed)
+    File.open(script, "wb") do |fh|
+      fh.write(inflated)
+    end
+  else
+    raise "Could not decompress."
+  end
+end
+load script
+if __FILE__ == $0
+  Propane::CLI.new.run(ARGV)
+end
+#==>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truncated

src/fart.propane

@@ -0,0 +1,28 @@
+tree;
+
+token height;
+token lcurly;
+token options;
+token rcurly;
+token scene;
+token width;
+
+token uint /\d+/;
+
+Start -> Options? Scene;
+
+Height -> height uint;
+
+Options -> options lcurly OptionsItems rcurly;
+
+OptionsItems -> ;
+OptionsItems -> OptionsItem OptionsItems;
+
+OptionsItem -> Height;
+OptionsItem -> Width;
+
+Scene -> scene lcurly SceneItems rcurly;
+
+SceneItems -> ;
+
+Width -> width uint;