CLI: -V now displays a short version string

 * -v shows the full version output with build details
 * -V (capital V) shows only the short version string

src/conky.cc

@@ -2101,9 +2101,9 @@ const char *getopt_string =
     ;
 
 const struct option longopts[] = {
-    {"help", 0, nullptr, 'h'},          {"version", 0, nullptr, 'V'},
-    {"quiet", 0, nullptr, 'q'},         {"debug", 0, nullptr, 'D'},
-    {"config", 1, nullptr, 'c'},
+    {"help", 0, nullptr, 'h'},          {"version", 0, nullptr, 'v'},
+    {"short-version", 0, nullptr, 'V'}, {"quiet", 0, nullptr, 'q'},
+    {"debug", 0, nullptr, 'D'},         {"config", 1, nullptr, 'c'},
 #ifdef BUILD_BUILTIN_CONFIG
     {"print-config", 0, nullptr, 'C'},
 #endif

src/main.cc

@@ -56,6 +56,8 @@
 #endif /* BUILD_OLD_CONFIG */
 #endif /* BUILD_BUILTIN_CONFIG */
 
+static void print_short_version() { std::cout << VERSION << std::endl; }
+
 static void print_version() {
   std::cout << _(PACKAGE_NAME " " VERSION " compiled for " BUILD_ARCH
                               "\n"
@@ -232,7 +234,8 @@ static void print_help(const char *prog_name) {
          "window. Command line options will override configurations defined in "
          "config\n"
          "file.\n"
-         "   -v, --version             version\n"
+         "   -v, --version             version with build details\n"
+         "   -V, --short-version       short version\n"
          "   -q, --quiet               quiet mode\n"
          "   -D, --debug               increase debugging output, ie. -DD for "
          "more debugging\n"
@@ -320,9 +323,11 @@ int main(int argc, char **argv) {
         global_debug_level++;
         break;
       case 'v':
-      case 'V':
         print_version();
         return EXIT_SUCCESS;
+      case 'V':
+        print_short_version();
+        return EXIT_SUCCESS;
       case 'c':
         current_config = optarg;
         break;