[vala/meson-msvc: 11/18] vala/meson.build: Use Python to generate libvala-0.xx.vapi

[Chun-wei Fan <fanchunwei src gnome org>]

commit a7a533c932eca983998bb2609b93cba30fa0d1a3
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Mon Jan 24 19:14:57 2022 +0800

    vala/meson.build: Use Python to generate libvala-0.xx.vapi
    
    This way, we do not need to depend on the 'cat' utility program which is
    not readily available on Windows unless one is using MSYS2 or Cygwin.

 vala/generate-libvala-vapi.py | 13 +++++++++++++
 vala/meson.build              |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)
---
diff --git a/vala/generate-libvala-vapi.py b/vala/generate-libvala-vapi.py
new file mode 100644
index 000000000..a8b802fda
--- /dev/null
+++ b/vala/generate-libvala-vapi.py
@@ -0,0 +1,13 @@
+#! /usr/bin/env python3
+
+# Generate libvala-0.xx.vapi from dependent vapi's
+
+import os
+import sys
+
+def generate_libvala_vapi(argv):
+    for f in argv[1:]:
+        with open(f, 'r') as l:
+            print(l.read())
+
+sys.exit(generate_libvala_vapi(sys.argv))
\ No newline at end of file
diff --git a/vala/meson.build b/vala/meson.build
index 3352df20c..c34613213 100644
--- a/vala/meson.build
+++ b/vala/meson.build
@@ -197,7 +197,7 @@ valacore_dep = declare_dependency(
 custom_target(
        'libvala@0@.vapi'.format(vala_version_suffix),
        command: [
-               find_program('cat'),
+               find_program('generate-libvala-vapi.py'),
                join_paths(meson.build_root(), 'gee', 'gee.vapi'),
                join_paths(meson.current_build_dir(), 'vala.vapi'),
        ],