2 files changed, 46 insertions, 9 deletions
diff --git a/lib/.gitignore b/lib/.gitignore
deleted file mode 100644
index e8db6e5..0000000
--- a/lib/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-/page.rb.txt
-\ No newline at end of file
diff --git a/lib/sitegen.rb b/lib/sitegen.rb
index f565d20..c687375 100644
--- a/lib/sitegen.rb
+++ b/lib/sitegen.rb
@@ -1,27 +1,65 @@
 # coding: utf-8
+require 'date'
 require 'set'
 
 module Sitegen
 	def self.init
-		@set = Set[]
 		@mk = {}
+		@want = Set[]
 	end
 	def self.add(page)
-		@set.add(page)
+		@deps = nil
+		page.local_depends.keys.each do |filename|
+			@mk[filename] = page unless filename.empty?
+		end
 	end
 	def self.pages
-		@set
+		@mk.values.to_set
 	end
 	def self.want(filename)
-		page = pages.select{|page|page.local_depends.keys.include?(filename)}.first
-		@mk[filename] = page
+		@deps = nil
+		@want.add(filename)
+	end
+	def self.dependencies
+		if @deps.nil?
+			libfiles = Dir::entries('lib').select{|s|s!='..'}.map{|s|"lib/#{s}"}.to_set
+			ret = {}
+			ret[:all] = @want
+			@want.each do |filename|
+				ret[filename] = libfiles.clone.merge(@mk[filename].local_depends[filename])
+			end
+			@deps = ret
+		end
+		@deps
 	end
 	def self.Makefile()
 		str = ''
-		str += "all: #{@mk.keys.sort.join(' ')}\n"
-		@mk.each do |filename, page|
-			str += "#{filename}: #{page.local_depends[filename].sort.join(' ')}\n"
+		dependencies.each do |target, deps|
+			str += "#{target.to_s}: #{deps.sort.join(' ')}\n"
 		end
 		return str
 	end
+
+	def self.make(target)
+		newest = DateTime::new(0)
+		(dependencies[target] || []).each do |dep|
+			ts = dep.make(dep)
+			newest = ts if ts > newest
+		end
+		unless target.is_a?(String)
+			return DateTime::now
+		end
+		if File::exist?(target)
+			ctime = File::ctime(target)
+			if ctime > newest
+				return ctime
+			end
+		end
+		generate(target)
+		return File::ctime(target)
+	end
+
+	def self.generate(target)
+		# TODO
+	end
 end