Mini Shell

# Example Rakefile -*- ruby -*-
# Using the power of Ruby

task :default => [:main]

def ext(fn, newext)
  fn.sub(/\.[^.]+$/, newext)
end

SRCFILES = Dir['*.c']
OBJFILES = SRCFILES.collect { |fn| ext(fn,".o") }

OBJFILES.each do |objfile|
  srcfile = ext(objfile, ".c")
  file objfile => [srcfile] do |t|
    sh "gcc #{srcfile} -c -o #{t.name}"
  end
end

file "main" => OBJFILES do |t|
  sh "gcc -o #{t.name} main.o a.o b.o"
end

task :clean do
  rm_f FileList['*.o']
  Dir['*~'].each { |fn| rm_f fn }
end

task :clobber => [:clean] do
  rm_f "main"
end

task :run => ["main"] do
  sh "./main"
end