1 files changed, 88 insertions, 0 deletions
diff --git a/rubymake.rb b/rubymake.rb
new file mode 100644
index 0000000..e8349e9
--- /dev/null
+++ b/rubymake.rb
@@ -0,0 +1,88 @@
+$makes = []
+$default = nil
+
+class Make
+  def initialize(target, froms, args, block)
+    @target = target
+    @froms = froms
+    @args = args
+    @block = block
+  end
+
+  def string_target?
+    @target.class == String
+  end
+
+  def match?(target)
+    if string_target?
+      @target == target
+    else
+      @target.match?(target)
+    end
+  end
+
+  def try_build(target)
+    reified_froms = string_target? ? @froms : reify_froms(target)
+
+    reified_froms.each do |from|
+      Make.make!(from)
+    end
+
+    if !!@args[:phony] ||
+       !File.exist?(target) ||
+       reified_froms.any? { |from| File.mtime(target) < File.mtime(from) }
+      @block.call(target, reified_froms, @args)
+    end
+  end
+
+  def reify_froms(target)
+    match = @target.match(target)
+
+    @froms.map do |from|
+      if match.names.empty?
+        from.gsub(/\$(\d+)/) {|m| match[m[1..].to_i]}
+      else
+        from.gsub(/\$#{match.names.join(?|)}/) {|m| match[m[1..]]}
+      end
+    end
+  end
+
+  def self.make!(target = nil)
+    print "Making: "
+    pp target
+
+    if target.nil?
+      target = ARGV.shift
+      if target.nil?
+        if $default.nil?
+          puts "No target given and no default set"
+          exit 1
+        else
+          target = $default
+          puts "Using default target: #{target}"
+        end
+      end
+    end
+
+    makes = $makes.select { |make| make.match?(target) }
+
+    if makes.empty?
+      puts "No valid target"
+    else
+      string_makes = makes.select(&:string_target?)
+      if string_makes.empty?
+        makes.first.try_build(target)
+      else
+        string_makes.first.try_build(target)
+      end
+    end
+  end
+end
+
+def to(target, *froms, **args, &block)
+  $makes << Make.new(target, froms, args, block)
+end
+
+def default(target)
+  $default = target
+end