[vala/parallel] Add --fast-internal-vapi= commandline option

[Ryan Lortie <ryanl src gnome org>]

commit c9256352473f3732b4b351a89b227e2ae2cade8f
Author: Ryan Lortie <desrt desrt ca>
Date:   Wed Aug 18 12:28:28 2010 -0400

    Add --fast-internal-vapi= commandline option
    
      This emits a .vapi file without performing symbol resolution.
    
      The 'using' directives are included directly into the vapi.

 compiler/valacompiler.vala |    9 +++++++++
 vala/valacodewriter.vala   |   19 +++++++++++++++++++
 2 files changed, 28 insertions(+), 0 deletions(-)
---
diff --git a/compiler/valacompiler.vala b/compiler/valacompiler.vala
index 6570d81..1885464 100644
--- a/compiler/valacompiler.vala
+++ b/compiler/valacompiler.vala
@@ -45,6 +45,7 @@ class Vala.Compiler {
 	static bool use_header;
 	static string internal_header_filename;
 	static string internal_vapi_filename;
+	static string fast_internal_vapi_filename;
 	static string symbols_filename;
 	static string includedir;
 	static bool compile_only;
@@ -95,6 +96,7 @@ class Vala.Compiler {
 		{ "includedir", 0, 0, OptionArg.FILENAME, ref includedir, "Directory used to include the C header file", "DIRECTORY" },
 		{ "internal-header", 'h', 0, OptionArg.FILENAME, ref internal_header_filename, "Output internal C header file", "FILE" },
 		{ "internal-vapi", 0, 0, OptionArg.FILENAME, ref internal_vapi_filename, "Output vapi with internal api", "FILE" },
+		{ "fast-internal-vapi", 0, 0, OptionArg.STRING, ref fast_internal_vapi_filename, "Output vapi without performing symbol resolution", null },
 		{ "symbols", 0, 0, OptionArg.FILENAME, ref symbols_filename, "Output symbols file", "FILE" },
 		{ "compile", 'c', 0, OptionArg.NONE, ref compile_only, "Compile but do not link", null },
 		{ "output", 'o', 0, OptionArg.FILENAME, ref output, "Place output in file FILE", "FILE" },
@@ -403,6 +405,13 @@ class Vala.Compiler {
 		if (context.report.get_errors () > 0) {
 			return quit ();
 		}
+
+		if (fast_internal_vapi_filename != null) {
+			var interface_writer = new CodeWriter (false, true);
+			interface_writer.set_emit_using (true);
+			interface_writer.write_file (context, fast_internal_vapi_filename);
+			return quit ();
+		}
 		
 		var resolver = new SymbolResolver ();
 		resolver.resolve (context);
diff --git a/vala/valacodewriter.vala b/vala/valacodewriter.vala
index 5b8ada0..08c8133 100644
--- a/vala/valacodewriter.vala
+++ b/vala/valacodewriter.vala
@@ -39,6 +39,7 @@ public class Vala.CodeWriter : CodeVisitor {
 
 	bool dump_tree;
 	bool emit_internal;
+	bool emit_using;
 
 	string? override_header = null;
 	string? header_to_override = null;
@@ -60,6 +61,14 @@ public class Vala.CodeWriter : CodeVisitor {
 	}
 
 	/**
+	 * Allows emitting 'using' into the output
+	 * @param enabled if using should be emitted
+	 */
+	public void set_emit_using (bool enabled) {
+		emit_using = enabled;
+	}
+
+	/**
 	 * Writes the public interface of the specified code context into the
 	 * specified file.
 	 *
@@ -91,6 +100,16 @@ public class Vala.CodeWriter : CodeVisitor {
 		stream = null;
 	}
 
+	public override void visit_using_directive (UsingDirective ns) {
+		if (emit_using) {
+			var symbol_name = ns.namespace_symbol.name;
+
+			if (symbol_name != "GLib") {
+				write_string ("using %s;\n".printf (symbol_name));
+			}
+		}
+	}
+
 	public override void visit_namespace (Namespace ns) {
 		if (ns.external_package) {
 			return;