[babl/wip/nielsdg/generate-vapi: 3/3] meson: Generate VAPI file

[Niels De Graef <nielsdg src gnome org>]

commit fcfb6e802aeb7ea243aab3de7c8806f2bff3fef8
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Mon Aug 12 06:58:56 2019 +0200

    meson: Generate VAPI file
    
    This can be used to call Babl from Vala. This is also very useful when
    we want to do the same thing (calling from vala) for GIMP 3.x

 .gitlab-ci.yml    | 1 +
 babl/meson.build  | 7 +++++++
 meson_options.txt | 1 +
 3 files changed, 9 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6da021f86..f98bb7b71 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,6 +17,7 @@ cache:
         git
         gobject-introspection
         meson
+        vala
         ${EXTRA_PKGS}
   script:
     - meson _build
diff --git a/babl/meson.build b/babl/meson.build
index 542bb622a..6feb107ba 100644
--- a/babl/meson.build
+++ b/babl/meson.build
@@ -161,4 +161,11 @@ if get_option('enable-gir')
     header: 'babl.h',
     install: true,
   )
+
+  if get_option('enable-vapi')
+    gnome.generate_vapi(lib_name,
+      sources: babl_gir[0],
+      install: true,
+    )
+  endif
 endif
diff --git a/meson_options.txt b/meson_options.txt
index eca27beb6..639192786 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -6,5 +6,6 @@ option('enable-sse4_1', type: 'boolean', value: true, description: 'enable SSE4.
 option('enable-avx2',   type: 'boolean', value: true, description: 'enable AVX2 support')
 option('enable-f16c',   type: 'boolean', value: true, description: 'enable hardware half-float support')
 option('enable-gir',    type: 'boolean', value: true, description: 'enable GObject-Introspection (GIR)')
+option('enable-vapi',   type: 'boolean', value: true, description: 'enable Vala .vapi generation (requires 
GIR)')
 option('with-docs',     type: 'boolean', value: true, description: 'build website')
 option('with-lcms',     type: 'boolean', value: true, description: 'build with lcms')