improvements, more config, add -q, readme

src/main.rs

@@ -31,12 +31,18 @@ async fn main() -> anyhow::Result<()> {
                 .multiple(true)
                 .help("increase logging, can be repeated"),
         )
+        .arg(
+            Arg::with_name("quiet")
+                .short("q")
+                .multiple(true)
+                .help("decrease logging, can be repeated"),
+        )
         .arg(
             Arg::with_name("config")
                 .short("c")
                 .long("config")
                 .takes_value(true)
-                .help("set custom config directory, defaults to groups.d"),
+                .help("set custom config directory, defaults to the current folder"),
         )
         .arg(
             Arg::with_name("auth")
@@ -64,9 +70,13 @@ async fn main() -> anyhow::Result<()> {
         LevelFilter::Trace,
     ];
 
-    let default_level = 2;
+    let default_level = 3;
 
-    let level = (default_level + args.occurrences_of("verbose") as usize).min(LEVELS.len());
+    let level = (
+        default_level as isize
+            + args.occurrences_of("verbose") as isize
+            - args.occurrences_of("quiet") as isize)
+        .clamp(0, LEVELS.len() as isize) as usize;
 
     env_logger::Builder::new()
         .filter_level(LEVELS[level])