MSVC builds: Add a .bat script to regenerate demos.h.win32

This adds a batch script which in turn calls the geninclude.pl.in PERL
script in demos/gtk-demo to re-generate demos.h.win32 with or without
the font features demo program by whether the "font" argument is
specified.

Note that the extra space character just before the first set FONT_MSG
line is intentional.

The complete batch script is generated upon 'make dist' so that the demo
listings can be as updated as possible.

build/win32/Makefile.am

@@ -1,7 +1,14 @@
 include $(top_srcdir)/Makefile.decl
 
+GENERATED_ITEMS = regenerate-demos-h-win32.bat
+
+regenerate-demos-h-win32.bat: $(srcdir)/regenerate-demos-h-win32.batin demos.list
+	-$(RM) $@
+	$(CPP) -P - -traditional-cpp <$< >$@
+	$(RM) demos.list
+
 if HAVE_INTROSPECTION
-GENERATED_ITEMS = \
+GENERATED_ITEMS += \
 	introspection.body.mak	\
 	Gdk_3_0_gir_list		\
 	GdkWin32_3_0_gir_list	\
@@ -19,13 +26,10 @@ introspection.body.mak: $(MSVC_INTROSPECTION_INTERMEDIATE_FILES)
 	done
 	$(RM) $(MSVC_INTROSPECTION_INTERMEDIATE_FILES)
 
-DISTCLEANFILES = $(GENERATED_ITEMS)
-
-else
-GENERATED_ITEMS =
-DISTCLEANFILES =
 endif
 
+DISTCLEANFILES = $(GENERATED_ITEMS)
+
 SUBDIRS =	\
 	vs9 	\
 	vs10	\
@@ -43,6 +47,7 @@ EXTRA_DIST +=	\
 	pc_base.py			\
 	gtkpc.py			\
 	README_EGL_MSVC.txt		\
+	regenerate-demos-h-win32.batin	\
 	$(GENERATED_ITEMS)
 
 -include $(top_srcdir)/git.mk

build/win32/regenerate-demos-h-win32.batin

@@ -0,0 +1,35 @@
+@echo off
+
+set TARGET=demos.h.win32
+set DEMOS= ^
+#include "demos.list"
+ 
+set FONT_MSG=without font features demo
+
+if "%1" == "" goto continue
+if not "%1" == "font" goto fail
+set DEMOS=%DEMOS% font_features.c
+set FONT_MSG=with font features demo
+
+:continue
+cd ..\..\demos\gtk-demo
+if exist %TARGET% ren %TARGET% %TARGET%.bak
+
+perl geninclude.pl.in %DEMOS% > %TARGET%
+
+goto done_script
+
+:fail
+echo Only "font" is accepted as a argument to this batch script
+goto end
+
+:done_script
+for %%T in (%TARGET%) do if exist %%T if %%~zT gtr 0 echo %%T is successfully regenerated %FONT_MSG%
+for %%T in (%TARGET%) do if exist %%T if %%~zT equ 0 del %%T
+if exist %TARGET% if exist %TARGET%.bak del %TARGET%.bak
+if not exist %TARGET% echo %TARGET% is not regenerated, restoring existing %TARGET%
+if not exist %TARGET% ren %TARGET%.bak %TARGET%
+
+:end
+cd ..\..\build\win32
+

demos/gtk-demo/Makefile.am

@@ -211,9 +211,20 @@ gtk3_demo_application_EXCLUDES = dummy
 
 include $(top_srcdir)/build/Makefile.msvcproj
 
+$(top_builddir)/build/win32/demos.list: Makefile
+	-$(RM) $@
+	for F in $(demos_base); do \
+		case $$F in \
+		*.c) \
+			echo $$F' ^'>>$(top_builddir)/build/win32/demos.list \
+			;; \
+		esac \
+	done
+
 dist-hook: \
 	$(top_builddir)/build/win32/vs9/gtk3-demo.vcproj	\
-	$(top_builddir)/build/win32/vs9/gtk3-demo-application.vcproj
+	$(top_builddir)/build/win32/vs9/gtk3-demo-application.vcproj	\
+	$(top_builddir)/build/win32/demos.list
 
 DISTCLEANFILES = demos.h demos.h.win32 $(extra_nodist_demo_sources)