swaybar: add --help option

1 files changed, 16 insertions, 1 deletions

diff --git a/swaybar/main.c b/swaybar/main.c
index 66077592..a3a3b56a 100644
--- a/swaybar/main.c
+++ b/swaybar/main.c
@@ -1191,6 +1191,7 @@ int main(int argc, char **argv) {
         bool debug = false;
 
         static struct option long_options[] = {
+                {"help", no_argument, NULL, 'h'},
                 {"version", no_argument, NULL, 'v'},
                 {"socket", required_argument, NULL, 's'},
                 {"bar_id", required_argument, NULL, 'b'},
@@ -1198,10 +1199,23 @@ int main(int argc, char **argv) {
                 {0, 0, 0, 0}
         };
 
+        const char *usage =
+                "Usage: swaybar [options...] <output>\n"
+                "\n"
+                "  -h, --help             Show help message and quit.\n"
+                "  -v, --version          Show the version number and quit.\n"
+                "  -s, --socket <socket>  Connect to sway via socket.\n"
+                "  -b, --bar_id <id>      Bar ID for which to get the configuration.\n"
+                "  -d, --debug            Enable debugging.\n"
+                "\n"
+                " PLEASE NOTE that swaybar will be automatically started by sway as\n"
+                " soon as there is a 'bar' configuration block in your config file.\n"
+                " You should never need to start it manually.\n";
+
         int c;
         while (1) {
                 int option_index = 0;
-                c = getopt_long(argc, argv, "vs:b:d", long_options, &option_index);
+                c = getopt_long(argc, argv, "hvs:b:d", long_options, &option_index);
                 if (c == -1) {
                         break;
                 }
@@ -1224,6 +1238,7 @@ int main(int argc, char **argv) {
                         debug = true;
                         break;
                 default:
+                        fprintf(stderr, "%s", usage);
                         exit(EXIT_FAILURE);
                 }
         }