Add an i3bar flag: --verbose

Fix the issue #3220. (https://github.com/i3/i3/issues/3220)

docs/debugging

@@ -160,7 +160,8 @@ flood kicks.
 
 == Debugging i3bar
 
-To debug i3bar problems, add +verbose yes+ to all +bar {}+ blocks in your i3
+To debug i3bar problems, use the +--verbose+ commandline parameter,
+or add +verbose yes+ to all +bar {}+ blocks in your i3
 config, reload your config and then restart all i3bar instances like this:
 
 ---------------------------------------------------------------------

i3bar/include/configuration.h

@@ -47,7 +47,7 @@ typedef struct config_t {
     bindings;
 
     position_t position;
-    int verbose;
+    bool verbose;
     struct xcb_color_strings_t colors;
     bool disable_binding_mode_indicator;
     bool disable_ws;

i3bar/src/main.c

@@ -62,6 +62,7 @@ void print_usage(char *elf_name) {
     printf("-s, --socket  <sock_path>\tConnect to i3 via <sock_path>\n");
     printf("-h, --help    Display this help message and exit\n");
     printf("-v, --version Display version number and exit\n");
+    printf("-V, --verbose Enable verbose mode\n");
     printf("\n");
     printf(" PLEASE NOTE that i3bar will be automatically started by i3\n"
            " as soon as there is a 'bar' configuration block in your\n"
@@ -106,9 +107,10 @@ int main(int argc, char **argv) {
         {"bar_id", required_argument, 0, 'b'},
         {"help", no_argument, 0, 'h'},
         {"version", no_argument, 0, 'v'},
+        {"verbose", no_argument, 0, 'V'},
         {NULL, 0, 0, 0}};
 
-    while ((opt = getopt_long(argc, argv, "b:s:hv", long_opt, &option_index)) != -1) {
+    while ((opt = getopt_long(argc, argv, "b:s:hvV", long_opt, &option_index)) != -1) {
         switch (opt) {
             case 's':
                 socket_path = expand_path(optarg);
@@ -120,6 +122,9 @@ int main(int argc, char **argv) {
             case 'b':
                 config.bar_id = sstrdup(optarg);
                 break;
+            case 'V':
+                config.verbose = true;
+                break;
             default:
                 print_usage(argv[0]);
                 exit(EXIT_SUCCESS);

src/main.c

@@ -949,8 +949,9 @@ int main(int argc, char *argv[]) {
     Barconfig *barconfig;
     TAILQ_FOREACH(barconfig, &barconfigs, configs) {
         char *command = NULL;
-        sasprintf(&command, "%s --bar_id=%s --socket=\"%s\"",
+        sasprintf(&command, "%s %s --bar_id=%s --socket=\"%s\"",
                   barconfig->i3bar_command ? barconfig->i3bar_command : "i3bar",
+                  barconfig->verbose ? "-V" : "",
                   barconfig->id, current_socketpath);
         LOG("Starting bar process: %s\n", command);
         start_application(command, true);