Add Precompile builder

lib/rscons.rb

@@ -33,6 +33,7 @@ module Rscons
     :Lex,
     :Library,
     :Object,
+    :Precompile,
     :Preprocess,
     :Program,
     :SharedLibrary,
@@ -152,6 +153,7 @@ require_relative "rscons/builders/disassemble"
 require_relative "rscons/builders/lex"
 require_relative "rscons/builders/library"
 require_relative "rscons/builders/object"
+require_relative "rscons/builders/precompile"
 require_relative "rscons/builders/preprocess"
 require_relative "rscons/builders/program"
 require_relative "rscons/builders/shared_library"

lib/rscons/builders/precompile.rb

@@ -0,0 +1,29 @@
+module Rscons
+  module Builders
+    # The Precompile builder generates .di interface files from .d source files
+    # for D.
+    class Precompile < Builder
+
+      # Run the builder to produce a build target.
+      def run(options)
+        if @command
+          finalize_command
+        else
+          if @sources.find {|s| s.end_with?(*@env.expand_varref("${DSUFFIX}", @vars))}
+            pcc = @env.expand_varref("${DC}")
+            if pcc =~ /ldc/
+              dpc_cmd = "${DPC_CMD:ldc}"
+            else
+              dpc_cmd = "${DPC_CMD:gdc}"
+            end
+            @vars["_TARGET"] = @target
+            @vars["_SOURCES"] = @sources
+            command = @env.build_command(dpc_cmd, @vars)
+            standard_command("Precompile <source>#{Util.short_format_paths(@sources)}<reset>", command)
+          end
+        end
+      end
+
+    end
+  end
+end

lib/rscons/default_construction_variables.rb

@@ -43,6 +43,8 @@ module Rscons
     "DFLAGS" => [],
     "DISASM_CMD" => %w[${OBJDUMP} ${DISASM_FLAGS} ${_SOURCES}],
     "DISASM_FLAGS" => %w[--disassemble --source],
+    "DPC_CMD:ldc" => %w[${DC} -H -Hf ${_TARGET} -o- ${INCPREFIX}${D_IMPORT_PATH} ${DFLAGS} ${_SOURCES}],
+    "DPC_CMD:gdc" => %w[${DC} -H -Hf ${_TARGET} -fsyntax-only ${INCPREFIX}${D_IMPORT_PATH} ${DFLAGS} ${_SOURCES}],
     "DSUFFIX" => %w[.d],
     "D_IMPORT_PATH" => [],
     "INCPREFIX" => "-I",