Minimal i3 setup

dotfiles/desktop/.config/i3/scripts/i3status-wrapper.sh

@@ -0,0 +1,94 @@
+#!/usr/bin/env bash
+
+battery_json() {
+    local total_now=0
+    local total_full=0
+    local overall_status=""
+    local now full status bat capacity icon color
+
+    shopt -s nullglob
+
+    for bat in /sys/class/power_supply/BAT*; do
+        [[ -d "$bat" ]] || continue
+
+        if [[ -r "$bat/energy_now" && -r "$bat/energy_full" ]]; then
+            now=$(<"$bat/energy_now")
+            full=$(<"$bat/energy_full")
+        elif [[ -r "$bat/charge_now" && -r "$bat/charge_full" ]]; then
+            now=$(<"$bat/charge_now")
+            full=$(<"$bat/charge_full")
+        else
+            continue
+        fi
+
+        status=$(<"$bat/status")
+
+        (( total_now += now ))
+        (( total_full += full ))
+
+        case "$status" in
+            Charging)
+                overall_status="Charging"
+                ;;
+            Discharging)
+                [[ "$overall_status" != "Charging" ]] && overall_status="Discharging"
+                ;;
+            Full)
+                [[ -z "$overall_status" ]] && overall_status="Full"
+                ;;
+            *)
+                [[ -z "$overall_status" ]] && overall_status="$status"
+                ;;
+        esac
+    done
+
+    (( total_full > 0 )) || return 1
+
+    capacity=$(( 100 * total_now / total_full ))
+
+    case "$overall_status" in
+        Charging) icon="⚡" ;;
+        Discharging) icon="🔋" ;;
+        Full) icon="✔" ;;
+        *) icon="?" ;;
+    esac
+
+    if (( capacity <= 15 )); then
+        color="#ff5555"
+    elif (( capacity <= 30 )); then
+        color="#f1fa8c"
+    else
+        color="#ffffff"
+    fi
+
+    printf '{"full_text":"%s %s%%","name":"battery","color":"%s"}' \
+        "$icon" "$capacity" "$color"
+}
+
+i3status | while IFS= read -r line; do
+    case "$line" in
+        '{"version":'* | '[')
+            printf '%s\n' "$line"
+            ;;
+        ,*)
+            batt="$(battery_json)"
+            if [[ -n "$batt" ]]; then
+                line="${line#,}"
+                printf ',[%s,%s\n' "$batt" "${line#\[}"
+            else
+                printf '%s\n' "$line"
+            fi
+            ;;
+        \[*)
+            batt="$(battery_json)"
+            if [[ -n "$batt" ]]; then
+                printf '[%s,%s\n' "$batt" "${line#\[}"
+            else
+                printf '%s\n' "$line"
+            fi
+            ;;
+        *)
+            printf '%s\n' "$line"
+            ;;
+    esac
+done