add Install builder - close #6

lib/rscons.rb

@@ -6,10 +6,11 @@ require_relative "rscons/varset"
 require_relative "rscons/version"
 
 # default builders
-require_relative "rscons/builders/command"
 require_relative "rscons/builders/cfile"
+require_relative "rscons/builders/command"
 require_relative "rscons/builders/directory"
 require_relative "rscons/builders/disassemble"
+require_relative "rscons/builders/install"
 require_relative "rscons/builders/library"
 require_relative "rscons/builders/object"
 require_relative "rscons/builders/preprocess"
@@ -25,6 +26,7 @@ module Rscons
     :CFile,
     :Directory,
     :Disassemble,
+    :Install,
     :Library,
     :Object,
     :Preprocess,

lib/rscons/builders/install.rb

@@ -0,0 +1,59 @@
+require "pathname"
+
+module Rscons
+  module Builders
+    # The Install builder copies files/directories to new locations.
+    class Install < Builder
+
+      # Run the builder to produce a build target.
+      #
+      # @param target [String] Target file name.
+      # @param sources [Array<String>] Source file name(s).
+      # @param cache [Cache] The Cache object.
+      # @param env [Environment] The Environment executing the builder.
+      # @param vars [Hash,VarSet] Extra construction variables.
+      #
+      # @return [String,false]
+      #   Name of the target file on success or false on failure.
+      def run(target, sources, cache, env, vars)
+        target_is_dir = (sources.length > 1) ||
+                        Dir.exists?(sources.first) ||
+                        Dir.exists?(target)
+        outdir = target_is_dir ? target : File.dirname(target)
+        # Collect the list of files to copy over.
+        file_map = {}
+        if target_is_dir
+          sources.each do |src|
+            if Dir.exists? src
+              Dir.glob("#{src}/**/*", File::FNM_DOTMATCH).select do |f|
+                File.file?(f)
+              end.each do |subfile|
+                subpath = Pathname.new(subfile).relative_path_from(Pathname.new(src)).to_s
+                file_map[subfile] = "#{outdir}/#{subpath}"
+              end
+            else
+              file_map[src] = "#{outdir}/#{File.basename(src)}"
+            end
+          end
+        else
+          file_map[sources.first] = target
+        end
+        printed_message = false
+        file_map.each do |src, dest|
+          # Check the cache and copy if necessary
+          unless cache.up_to_date?(dest, :Copy, [src], env)
+            unless printed_message
+              puts "#{name} #{target}"
+              printed_message = true
+            end
+            cache.mkdir_p(File.dirname(dest))
+            FileUtils.cp(src, dest, :preserve => true)
+          end
+          cache.register_build(dest, :Copy, [src], env)
+        end
+        target if (target_is_dir ? Dir.exists?(target) : File.exists?(target))
+      end
+
+    end
+  end
+end