Dynamic battery widget

docs/content/usage/widgets/battery.md

@@ -2,7 +2,7 @@
 
 !!! Warning
 
-    The battery features are unavailable if the binary is compiled with the `battery` feature disabled!
+    The battery features are unavailable if the binary is compiled with the `battery` feature disabled or if there are no batteries on the system!
 
 The battery widget provides information about batteries on the system.
 

src/options.rs

@@ -10,6 +10,10 @@ use clap::ArgMatches;
 use layout_options::*;
 use regex::Regex;
 use serde::{Deserialize, Serialize};
+
+#[cfg(feature = "battery")]
+use starship_battery::Manager;
+
 use typed_builder::*;
 
 use crate::{
@@ -844,6 +848,15 @@ fn get_hide_table_gap(matches: &ArgMatches, config: &Config) -> bool {
 }
 
 fn get_use_battery(matches: &ArgMatches, config: &Config) -> bool {
+    #[cfg(feature = "battery")]
+    if let Ok(battery_manager) = Manager::new() {
+        if let Ok(batteries) = battery_manager.batteries() {
+            if batteries.count() == 0 {
+                return false;
+            }
+        }
+    }
+
     if cfg!(feature = "battery") {
         if matches.is_present("battery") {
             return true;