log_android_logcat.sh

#!/bin/bash

################################################
# Advanced ADB Logcat Monitor for android apps #
# Author: Reza Esmaeili                        #
################################################

APP_NAME="avaair"
PACKAGE_NAME="ir.avaair"  # ← Change if needed
LOG_DIR="logs"
mkdir -p "$LOG_DIR"

# Colors for nice console output
RED="\033[0;31m"
GREEN="\033[0;32m"
YELLOW="\033[1;33m"
BLUE="\033[0;34m"
NC="\033[0m" # No Color

FILTER="${1:-*:V}" # Default to verbose logs if no argument passed
START_TIME=$(date +%s)

# --- Cleanup on exit ---
cleanup() {
  echo -e "\n${YELLOW}🧹 Cleaning up...${NC}"
  pkill -f "adb -s $DEVICE logcat --pid" 2>/dev/null
  echo -e "${GREEN}✅ Done.${NC}"
  exit 0
}
trap cleanup SIGINT SIGTERM

# --- Device selection ---
echo -e "${BLUE}🔍 Checking connected devices...${NC}"
DEVICES=($(adb devices | grep -w "device" | awk '{print $1}'))

if [ ${#DEVICES[@]} -eq 0 ]; then
  echo -e "${RED}❌ No devices found. Connect a device or ensure it's authorized.${NC}"
  exit 1
fi

# Handle unauthorized/offline states
if adb devices | grep -q "unauthorized"; then
  echo -e "${RED}⚠️  Device unauthorized. Accept RSA prompt on your device.${NC}"
  exit 1
fi

if adb devices | grep -q "offline"; then
  echo -e "${RED}⚠️  Device offline. Reconnect or restart adb server.${NC}"
  exit 1
fi

if [ ${#DEVICES[@]} -gt 1 ]; then
  echo -e "${YELLOW}📱 Multiple devices found:${NC}"
  i=1
  for d in "${DEVICES[@]}"; do
    echo "  [$i] $d"
    ((i++))
  done
  read -p "👉 Select device number: " choice
  DEVICE=${DEVICES[$((choice-1))]}
else
  DEVICE=${DEVICES[0]}
  echo -e "${GREEN}📱 Using single device:${NC} $DEVICE"
fi

# --- Helper: choose ps command dynamically ---
detect_ps_cmd() {
  if adb -s "$DEVICE" shell ps -A >/dev/null 2>&1; then
    echo "ps -A"
  else
    echo "ps"
  fi
}

PS_CMD=$(detect_ps_cmd)

# --- Get PID for app ---
get_pid() {
  adb -s "$DEVICE" shell $PS_CMD | grep "$APP_NAME" | awk '{print $2}' | head -n 1
}

# --- Start logcat session ---
start_logcat() {
  local PID=$1
  local LOG_FILE="$LOG_DIR/${APP_NAME}_$(date +'%Y-%m-%d_%H-%M-%S').log"

  echo -e "${GREEN}📜 Logging PID $PID ($APP_NAME) → ${LOG_FILE}${NC}"
  echo -e "${BLUE}🔎 Filter:${NC} $FILTER"
  echo "----------------------------------------"
  adb -s "$DEVICE" logcat --pid=$PID $FILTER | tee -a "$LOG_FILE"
}

# --- Restart app helper (optional) ---
restart_app() {
  if [ -n "$PACKAGE_NAME" ]; then
    echo -e "${YELLOW}🔁 Restarting app $PACKAGE_NAME...${NC}"
    adb -s "$DEVICE" shell am force-stop "$PACKAGE_NAME"
    adb -s "$DEVICE" shell monkey -p "$PACKAGE_NAME" 1 >/dev/null 2>&1
  fi
}

# --- Main loop ---
LAST_PID=""

while true; do
  PID=$(get_pid)

  if [ -z "$PID" ]; then
    echo -e "${YELLOW}⚠️  Waiting for process '$APP_NAME' to start...${NC}"
    sleep 3
    continue
  fi

  if [ "$PID" != "$LAST_PID" ]; then
    if [ -n "$LAST_PID" ]; then
      echo -e "${BLUE}🔁 Process restarted (old: $LAST_PID → new: $PID).${NC}"
    fi

    LAST_PID=$PID

    # Stop previous logcat if running
    pkill -f "adb -s $DEVICE logcat --pid=$LAST_PID" 2>/dev/null

    # Start new logcat in background
    start_logcat "$PID" &
  fi

  sleep 5
done