Add ability to build with Meson

So that vala-language-server can be used, see also
https://github.com/benwaffle/vala-language-server/issues/73

Works with both vim-lsp and Qt Creator, to some extent.

.gitignore

@@ -7,3 +7,5 @@
 /wdmtg.files
 /wdmtg.creator*
 /wdmtg.includes
+/wdmtg.cflags
+/wdmtg.cxxflags

config.vala.in

@@ -1,8 +1,8 @@
 [CCode (cprefix = "", lower_case_cprefix = "")]
 namespace Config
 {
-	public const string PROJECT_NAME = "${CMAKE_PROJECT_NAME}";
-	public const string PROJECT_VERSION = "${project_VERSION}";
+	public const string PROJECT_NAME = "@CMAKE_PROJECT_NAME@";
+	public const string PROJECT_VERSION = "@project_VERSION@";
 	public const string SHARE_DIR = "@project_SHARE_DIR@";
 }
 

meson.build

@@ -0,0 +1,33 @@
+project('wdmtg', 'vala', 'c', default_options : ['c_std=gnu99'],
+	version : '0.1.0')
+add_project_arguments(['--vapidir', meson.current_source_dir()],
+	language: 'vala')
+
+conf = configuration_data()
+conf.set('CMAKE_PROJECT_NAME', meson.project_name())
+conf.set('project_VERSION', meson.project_version())
+configure_file(
+	input : 'config.vala.in',
+	output : 'config.vala',
+	configuration : conf,
+)
+
+dependencies = [
+	dependency('gtk+-3.0'),
+	dependency('gmodule-2.0'),
+	dependency('gio-2.0'),
+	dependency('gee-0.8'),
+	dependency('sqlite3'),
+	dependency('x11'),
+
+	# Ours
+	dependency('xext'),
+	dependency('xextproto'),
+]
+sources = files(
+	'wdmtg.vala',
+	meson.current_build_dir() / 'config.vala',
+)
+executable('wdmtg', sources,
+	install : true,
+	dependencies : dependencies)

xext.deps

@@ -0,0 +1 @@
+x11

xextproto.vapi

@@ -0,0 +1 @@
+// https://github.com/mesonbuild/meson/issues/1195