Add --version option

Author: moverest

meson.build

@@ -4,12 +4,13 @@ project(
   meson_version: '>=0.60.0',
   default_options: ['c_std=c11'],
   license: 'GPL-3.0',
-  version: '0.2.3',
+  version: '0.3.0',
 )
 
 use_opencv = get_option('opencv').enabled()
 
 add_project_arguments('-D_GNU_SOURCE=200809L', language: 'c')
+add_project_arguments('-DVERSION="@0@"'.format(meson.project_version()), language: 'c')
 cc = meson.get_compiler('c')
 
 if use_opencv

src/main.c

@@ -661,6 +661,7 @@ static void print_usage() {
 
     puts(" -h, --help          show this help");
     puts(" --help-config       show help on configuration");
+    puts(" -v, --version       show version");
     puts(" -c, --config=FILE   use given configuration file");
     puts(" -r, --restrict=AREA restrict to given area (wxh+x+y)");
     puts(" -o, --option        set configuration option");
@@ -670,6 +671,14 @@ static void print_usage() {
     );
 }
 
+static void print_version() {
+    printf("wl-kbptr %s", VERSION);
+#if OPENCV_ENABLED
+    printf(" (opencv)");
+#endif
+    puts("");
+}
+
 int main(int argc, char **argv) {
     struct state state = {
         .wl_display          = NULL,
@@ -701,6 +710,7 @@ int main(int argc, char **argv) {
     static struct option long_options[] = {
         {"help", no_argument, 0, 'h'},
         {"help-config", no_argument, 0, 'H'},
+        {"version", no_argument, 0, 'v'},
         {"restrict", required_argument, 0, 'r'},
         {"config", required_argument, 0, 'c'},
         {"output", required_argument, 0, 'O'},
@@ -720,6 +730,10 @@ int main(int argc, char **argv) {
             print_usage();
             return 0;
 
+        case 'v':
+            print_version();
+            return 0;
+
         case 'r':
             if (sscanf(
                     optarg, "%dx%d+%d+%d", &state.initial_area.w,