add command line option to show version

src/meson.build

@@ -1,4 +1,9 @@
-# Define libtuxclocker target here since others depend on it
+# Version information
+tuxclocker_version = '1.3.0-rc.1'
+git_commit = run_command('git', 'describe', '--always', '--dirty').stdout().strip()
+version_string = '@0@, git commit @1@'.format(tuxclocker_version, git_commit)
+# Used in preprocessor
+version_string_def = '-DTUXCLOCKER_VERSION_STRING="@0@"'.format(version_string)
 
 # OpenSSL is used for hash functions
 openssl_dep = dependency('openssl')
@@ -15,6 +20,7 @@ plugin_path_def = plugin_path_def_template.format(get_option('prefix'), get_opti
 locale_path_def_template = '-DTUXCLOCKER_LOCALE_PATH="@0@/@1@/locale"'
 locale_path_def = locale_path_def_template.format(get_option('prefix'), get_option('datadir'))
 
+# Define libtuxclocker target here since others depend on it
 libtuxclocker = shared_library('tuxclocker',
 	['lib/Crypto.cpp',
 	 'lib/Plugin.cpp'],

src/tuxclocker-qt/main.cpp

@@ -1,10 +1,16 @@
 #include <libintl.h>
 #include <QApplication>
+#include <QCommandLineParser>
 
 #include "MainWindow.hpp"
 
 int main(int argc, char **argv) {
 	QApplication app(argc, argv);
+	app.setApplicationVersion(TUXCLOCKER_VERSION_STRING);
+
+	QCommandLineParser parser;
+	parser.addVersionOption();
+	parser.process(app);
 
 	setlocale(LC_MESSAGES, "");
 	bindtextdomain("tuxclocker", TUXCLOCKER_LOCALE_PATH);

src/tuxclocker-qt/meson.build

@@ -46,5 +46,5 @@ executable('tuxclocker-qt',
 	override_options : ['cpp_std=c++17'],
 	dependencies: qt5_dep,
 	include_directories: [incdir, local_incdir],
-        cpp_args : locale_path_def,
+        cpp_args : [locale_path_def, version_string_def],
 	install: true)

src/tuxclockerd/main.cpp

@@ -1,6 +1,7 @@
 #include <DBusTypes.hpp>
 #include <iostream>
 #include <libintl.h>
+#include <QCommandLineParser>
 #include <QCoreApplication>
 #include <QDBusConnection>
 #include <QDBusError>
@@ -21,6 +22,11 @@ namespace TCDBus = TuxClocker::DBus;
 
 int main(int argc, char **argv) {
 	QCoreApplication a(argc, argv);
+	a.setApplicationVersion(TUXCLOCKER_VERSION_STRING);
+
+	QCommandLineParser parser;
+	parser.addVersionOption();
+	parser.process(a);
 
 	// TODO: should numbers here be localized or not?
 	setlocale(LC_MESSAGES, "");

src/tuxclockerd/meson.build

@@ -18,7 +18,7 @@ executable('tuxclockerd',
 	include_directories : [incdir, patterns_inc],
 	dependencies : [qt5_dep, boost_dep],
 	link_with : libtuxclocker,
-        cpp_args : locale_path_def,
+        cpp_args : [locale_path_def,  version_string_def],
 	install : true)
 	
 # DBus data directories