setup.sh

#!/bin/bash

# Setup script for Linux Log Analyzer
# This script helps set up the environment and dependencies

set -e

echo "=========================================="
echo "Linux Log Analyzer - Setup Script"
echo "=========================================="
echo ""

# Check Python version
echo "Checking Python version..."
python_version=$(python3 --version 2>&1 | awk '{print $2}')
echo "Found Python $python_version"

# Check if Python 3.8+
required_version="3.8"
if [ "$(printf '%s\n' "$required_version" "$python_version" | sort -V | head -n1)" != "$required_version" ]; then
    echo "Error: Python 3.8 or higher is required"
    exit 1
fi
echo "✓ Python version is compatible"
echo ""

# Check for systemd
echo "Checking for systemd..."
if command -v journalctl &> /dev/null; then
    echo "✓ journalctl found"
else
    echo "⚠ Warning: journalctl not found. Systemd log collection will not work."
fi
echo ""

# Create virtual environment
echo "Creating virtual environment..."
if [ -d "venv" ]; then
    echo "Virtual environment already exists"
else
    python3 -m venv venv
    echo "✓ Virtual environment created"
fi
echo ""

# Activate virtual environment
echo "Activating virtual environment..."
source venv/bin/activate
echo "✓ Virtual environment activated"
echo ""

# Upgrade pip
echo "Upgrading pip..."
pip install --upgrade pip
echo "✓ pip upgraded"
echo ""

# Install dependencies
echo "Installing dependencies..."
pip install -r requirements.txt
echo "✓ Dependencies installed"
echo ""

# Check permissions
echo "Checking log file permissions..."
log_files=(
    "/var/log/syslog"
    "/var/log/auth.log"
    "/var/log/kern.log"
)

needs_sudo=false
for log_file in "${log_files[@]}"; do
    if [ -f "$log_file" ]; then
        if [ -r "$log_file" ]; then
            echo "✓ $log_file is readable"
        else
            echo "✗ $log_file is not readable"
            needs_sudo=true
        fi
    else
        echo "⚠ $log_file does not exist"
    fi
done
echo ""

# Check journalctl access
echo "Checking journalctl access..."
if journalctl -n 1 &> /dev/null; then
    echo "✓ journalctl is accessible"
else
    echo "✗ journalctl requires elevated permissions"
    needs_sudo=true
fi
echo ""

# Provide permission instructions if needed
if [ "$needs_sudo" = true ]; then
    echo "=========================================="
    echo "PERMISSION SETUP REQUIRED"
    echo "=========================================="
    echo ""
    echo "Some log files require elevated permissions."
    echo "You have two options:"
    echo ""
    echo "Option 1: Add your user to the systemd-journal group"
    echo "  sudo usermod -a -G systemd-journal $USER"
    echo "  sudo usermod -a -G adm $USER"
    echo "  (Then log out and log back in)"
    echo ""
    echo "Option 2: Run the application with sudo"
    echo "  sudo venv/bin/streamlit run app.py"
    echo ""
fi

# Create example config if needed
if [ ! -f "config.yaml" ]; then
    echo "⚠ config.yaml not found"
    echo "Please create config.yaml based on the template"
else
    echo "✓ config.yaml found"
fi
echo ""

echo "=========================================="
echo "Setup Complete!"
echo "=========================================="
echo ""
echo "To run the application:"
echo "  1. Activate the virtual environment:"
echo "     source venv/bin/activate"
echo ""
echo "  2. Start the Streamlit app:"
echo "     streamlit run app.py"
echo ""
echo "  3. Or run the example script:"
echo "     python example_usage.py"
echo ""
echo "For more information, see README.md"
echo ""

# Made with Bob