tmux-claude.sh

#!/bin/bash
# tmux-claude.sh — Claude Code usage for tmux status bar
# Compact 5-char progress bars with color coding
# Format: 󰚩 ██░░░22% █░░░░14%

CACHE="/tmp/tmux-claude-cache"
LOCK="/tmp/tmux-claude-lock"
CREDS="$HOME/.claude/.credentials.json"
MAX_AGE=300

GREEN="#a6da95"
YELLOW="#eed49f"
RED="#ed8796"
DIM="#7a839e"
LABEL="#769ff0"

color_for_pct() {
    local pct=$1
    if [ "$pct" -lt 50 ]; then echo "$GREEN"
    elif [ "$pct" -lt 80 ]; then echo "$YELLOW"
    else echo "$RED"
    fi
}

make_bar() {
    local pct=$1 width=5
    local filled=$(( (pct * width + 50) / 100 ))
    [ "$filled" -gt "$width" ] && filled=$width
    local empty=$((width - filled))
    local bar=""
    for ((i=0; i<filled; i++)); do bar+="█"; done
    for ((i=0; i<empty; i++)); do bar+="░"; done
    echo "$bar"
}

format_segment() {
    local pct=$1
    local color bar filled empty fill_part empty_part
    color=$(color_for_pct "$pct")
    bar=$(make_bar "$pct")
    filled=$(( (pct * 5 + 50) / 100 ))
    [ "$filled" -gt 5 ] && filled=5
    empty=$((5 - filled))
    fill_part="${bar:0:$filled}"
    empty_part="${bar:$filled:$empty}"
    printf "#[fg=%s]%s#[fg=%s]%s#[fg=%s]%d%%" \
        "$color" "$fill_part" "$DIM" "$empty_part" "$color" "$pct"
}

fetch_usage() {
    if [ ! -f "$CREDS" ]; then echo "-"; return; fi

    local token
    token=$(jq -r '.claudeAiOauth.accessToken // empty' "$CREDS")
    if [ -z "$token" ]; then echo "-"; return; fi

    local json
    json=$(curl -s --max-time 5 \
        -H "Authorization: Bearer $token" \
        -H "anthropic-beta: oauth-2025-04-20" \
        -H "Content-Type: application/json" \
        "https://api.anthropic.com/api/oauth/usage" 2>/dev/null)

    if [ -z "$json" ]; then echo "-"; return; fi

    local s_pct w_pct
    s_pct=$(echo "$json" | jq -r '.five_hour.utilization // empty' | xargs printf '%.0f' 2>/dev/null)
    w_pct=$(echo "$json" | jq -r '.seven_day.utilization // empty' | xargs printf '%.0f' 2>/dev/null)

    if [ -z "$s_pct" ] || [ -z "$w_pct" ]; then echo "-"; return; fi

    echo "$s_pct $w_pct" > "$PCT_CACHE"

    printf "#[fg=%s]󰚩 %s %s\n" \
        "$LABEL" "$(format_segment "$s_pct")" "$(format_segment "$w_pct")"
}

PCT_CACHE="/tmp/tmux-claude-pct"

compact_output() {
    if [ -f "$PCT_CACHE" ]; then
        local s_pct w_pct
        read -r s_pct w_pct < "$PCT_CACHE"
        if [ -n "$s_pct" ] && [ -n "$w_pct" ]; then
            local s_color w_color
            s_color=$(color_for_pct "$s_pct")
            w_color=$(color_for_pct "$w_pct")
            printf "#[fg=%s]%d%%#[fg=%s]/#[fg=%s]%d%%" "$s_color" "$s_pct" "$DIM" "$w_color" "$w_pct"
            return
        fi
    fi
    echo "-"
}

# Cache logic
if [ -f "$CACHE" ]; then
    cached=$(cat "$CACHE")
    age=$(( $(date +%s) - $(stat -c %Y "$CACHE") ))
else
    cached=""
    age=$((MAX_AGE + 1))
fi

if [ "$age" -le "$MAX_AGE" ]; then
    if [ "$1" = "--compact" ]; then compact_output; else echo "$cached"; fi
elif [ -n "$cached" ]; then
    if [ "$1" = "--compact" ]; then compact_output; else echo "$cached"; fi
    if mkdir "$LOCK" 2>/dev/null; then
        (
            trap 'rmdir "$LOCK" 2>/dev/null' EXIT
            result=$(fetch_usage)
            echo "$result" > "$CACHE"
        ) &
    fi
else
    result=$(fetch_usage)
    echo "$result" > "$CACHE"
    if [ "$1" = "--compact" ]; then compact_output; else echo "$result"; fi
fi