see name

update-podman-service-hosts.py

#!/usr/bin/env python3
import os
import re

def parse_podman_service(service_content):
    result = {"name": None, "ip": None}
    if not re.search(r'^ExecStart=(/usr/bin/podman|podman)\s', service_content, re.MULTILINE):
        return result
    ip_match = re.search(r'--ip(\s+|=)(\d+\.\d+\.\d+\.\d+)', service_content)
    name_match = re.search(r'(?:--name|-n)(\s+|=)([\w-]+)', service_content)
    if ip_match:
        result["ip"] = ip_match.group(2)
    if name_match:
        result["name"] = name_match.group(2)
    return result

def update_hosts_section(hosts_path, section_name, entries):
    section_start = f"# BEGIN {section_name}"
    section_end = f"# END {section_name}"
    new_section = [section_start] + [f"{ip} {name}" for ip, name in entries if ip and name] + [section_end]
    try:
        with open(hosts_path, 'r') as file:
            lines = file.readlines()

        if lines[-1][-1] != '\n':
            lines.append('\n')
        start_index = end_index = -1
        start_found = end_found = False
        for i, line in enumerate(lines):
            if line.strip() == section_start:
                start_index = i
                start_found = True
            elif line.strip() == section_end:
                end_index = i
                if start_found:
                    end_found = True
            if start_found and end_found:
                break
        if start_index != -1 and end_index != -1:
            lines[start_index:end_index + 1] = []
        lines.extend([line + '\n' for line in new_section])
        with open(hosts_path, 'w') as file:
            file.writelines(lines)
    except IOError as e:
        print(f"Error updating hosts file: {e}")
        return False
    return True

def scan_and_update_hosts(service_dir, hosts_path):
    entries = []
    for filename in os.listdir(service_dir):
        if filename.endswith('.service'):
            fp = os.path.join(service_dir, filename)
            if not os.path.exists(fp):
                continue
            with open(fp, 'r') as file:
                service_content = file.read()
            service_info = parse_podman_service(service_content)
            if service_info['name'] and service_info['ip']:
                entries.append((service_info['ip'], service_info['name']))
    entries.insert(0, ("10.88.0.1", "podman-host"))
    return update_hosts_section(hosts_path, 'podman-service-hosts', entries)

if __name__ == '__main__':
    # Example usage
    service_dir = '/etc/systemd/system'  # Replace with your service directory path
    hosts_path = '/etc/hosts'  # Replace with your hosts file path for testing
    scan_and_update_hosts(service_dir, hosts_path)