[vala] vapigen: Add --nostdpkg option like in valac

[Rico Tzschichholz <ricotz src gnome org>]

commit 55ce2510f3a3058a567a03aa726bf2ecf2319276
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Apr 2 13:37:16 2017 +0200

    vapigen: Add --nostdpkg option like in valac

 vapigen/valavapigen.vala |   14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/vapigen/valavapigen.vala b/vapigen/valavapigen.vala
index 81b627e..287ec7a 100644
--- a/vapigen/valavapigen.vala
+++ b/vapigen/valavapigen.vala
@@ -38,12 +38,15 @@ class Vala.VAPIGen : Object {
        static string library;
        [CCode (array_length = false, array_null_terminated = true)]
        static string[] packages;
+       static bool nostdpkg;
+
        CodeContext context;
 
        const OptionEntry[] options = {
                { "vapidir", 0, 0, OptionArg.FILENAME_ARRAY, ref vapi_directories, "Look for package bindings 
in DIRECTORY", "DIRECTORY..." },
                { "girdir", 0, 0, OptionArg.FILENAME_ARRAY, ref gir_directories, "Look for GIR bindings in 
DIRECTORY", "DIRECTORY..." },
                { "metadatadir", 0, 0, OptionArg.FILENAME_ARRAY, ref metadata_directories, "Look for GIR 
.metadata files in DIRECTORY", "DIRECTORY..." },
+               { "nostdpkg", 0, 0, OptionArg.NONE, ref nostdpkg, "Do not include standard packages", null },
                { "pkg", 0, 0, OptionArg.STRING_ARRAY, ref packages, "Include binding for PACKAGE", 
"PACKAGE..." },
                { "library", 0, 0, OptionArg.STRING, ref library, "Library name", "NAME" },
                { "directory", 'd', 0, OptionArg.FILENAME, ref directory, "Output directory", "DIRECTORY" },
@@ -77,10 +80,13 @@ class Vala.VAPIGen : Object {
                context.report.enable_warnings = !disable_warnings;
                context.report.set_verbose_errors (!quiet_mode);
                CodeContext.push (context);
-               
-               /* default package */
-               context.add_external_package ("glib-2.0");
-               context.add_external_package ("gobject-2.0");
+               context.nostdpkg = nostdpkg;
+
+               if (!nostdpkg) {
+                       /* default package */
+                       context.add_external_package ("glib-2.0");
+                       context.add_external_package ("gobject-2.0");
+               }
 
                if (context.report.get_errors () > 0) {
                        return quit ();