first

build.rb

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+#!/usr/bin/ruby
+
+#I'll put this in here as an example
+
+# make a folder called src and a folder called build
+# then put some c source code in src
+# then run rub and watch it build
+
+# of course you could make your own build.rb to build any project
+
+#	ruby might not let you modify CONSTANTS
+#	so put a $ in front of the name which makes
+#	them global and not CONSTANT
+$CC="gcc"
+CFLAGS="-O1 -march=native -std=c11 -fmacro-prefix-map=src="
+$EFLAGS = "" #extra flags
+APPNAME="chess"
+SRCDIR="src"
+BUILDDIR="build"
+INCLUDE=""
+LIB="-lraylib"
+
+def error(msg)
+	puts "error: #{msg}"
+	exit(1)
+end
+
+#handle argument parsing yourself
+def parse(arg)
+	case arg
+	when "clean"
+		`rm build/*`
+		`rm #{APPNAME}`
+		exit(0)
+
+	when "debug"
+		$EFLAGS = "-DDEBUG"
+		main
+
+	when arg.split("=")[0] = "cc"
+		$CC = arg.split("=")[1]
+		main
+	
+	else
+		error "unknown argument: #{arg}"
+	end
+end
+
+#same as above
+def args
+	case ARGV.count
+	when 0
+		main
+	when 1
+		parse(ARGV[0])
+	else
+		puts "too many arguments"
+	end
+end
+
+#main build function
+def main
+	threads = []
+
+	Dir.each_child(SRCDIR) {|x|
+		threads << Thread.new {
+			system("#{$CC} #{INCLUDE} #{CFLAGS} #{$EFLAGS} -c #{SRCDIR}/#{x} -o #{BUILDDIR}/#{File.basename(x, ".*") + ".o"}") if x.end_with?(".c")
+			print "compiled: #{x}\n" if x.end_with?(".c")
+		}
+	}
+
+	threads.each{ |t| t.join }
+
+	#wait for each thread to finish 
+	until threads.map { |t| t.alive? }.include?(false) 
+	end
+
+	build = Dir.each_child(BUILDDIR)
+	o_files = []
+	build.each { |s|
+		o_files.append("#{BUILDDIR}/#{s}")
+	}
+
+	`#{$CC} #{CFLAGS} #{$EFLAGS} #{o_files.join(" ")} -o #{APPNAME} #{LIB}`
+	exit(0)
+end
+
+#run some functions
+args

install

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+chmod +x rub
+cp rub /usr/local/bin/rub

readme.md

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+#Rub
+>to install
+```
+#sh install
+```
+>to run
+```
+$rub
+```

rub

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+#!/usr/bin/ruby
+
+require "#{Dir.pwd}/build.rb"