[vala/staging] girwriter: Mention that this file is generated and not meant to be modified

[Rico Tzschichholz <ricotz src gnome org>]

commit fd3fedf3e7fd56162e5721d9e7487784b009c75b
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat Apr 27 10:25:32 2019 +0200

    girwriter: Mention that this file is generated and not meant to be modified
    
    Same as already done for generated vapi files.

 codegen/valagirwriter.vala               | 5 +++++
 tests/girwriter/GirTest-1.0.gir-expected | 1 +
 2 files changed, 6 insertions(+)
---
diff --git a/codegen/valagirwriter.vala b/codegen/valagirwriter.vala
index 4373ec8bb..c5bec0fce 100644
--- a/codegen/valagirwriter.vala
+++ b/codegen/valagirwriter.vala
@@ -171,6 +171,11 @@ public class Vala.GIRWriter : CodeVisitor {
 
                stream.printf ("<?xml version=\"1.0\"?>\n");
 
+               var header = context.version_header ?
+                       "<!-- %s generated by %s %s, do not modify. -->".printf (Path.get_basename 
(filename), Environment.get_prgname (), Vala.BUILD_VERSION) :
+                       "<!-- %s generated by %s, do not modify. -->".printf (Path.get_basename (filename), 
Environment.get_prgname ());
+               stream.printf ("%s\n", header);
+
                stream.printf ("<repository version=\"1.2\"");
                stream.printf (" xmlns=\"http://www.gtk.org/introspection/core/1.0\"";);
                stream.printf (" xmlns:c=\"http://www.gtk.org/introspection/c/1.0\"";);
diff --git a/tests/girwriter/GirTest-1.0.gir-expected b/tests/girwriter/GirTest-1.0.gir-expected
index 052868bb6..1bad12723 100644
--- a/tests/girwriter/GirTest-1.0.gir-expected
+++ b/tests/girwriter/GirTest-1.0.gir-expected
@@ -1,4 +1,5 @@
 <?xml version="1.0"?>
+<!-- GirTest-1.0.gir generated by valac, do not modify. -->
 <repository version="1.2" xmlns="http://www.gtk.org/introspection/core/1.0"; 
xmlns:c="http://www.gtk.org/introspection/c/1.0"; xmlns:glib="http://www.gtk.org/introspection/glib/1.0";>
 <include name="GObject" version="2.0"/>
 <include name="GLib" version="2.0"/>