boxtools/install.py

#!/usr/bin/python3
"""install.py

copy files from to_system into system directories
"""

import os
import filecmp
import shutil
from glob import glob
from ipaddress import IPv4Interface
from configparser import ConfigParser
from os.path import join, getmtime, exists

os.chdir('to_system')

DEL = '__to_delete__'
CFGPATH = '/root/aputools/servercfg/%s.cfg'

def create_if(name, mac, cfg):
    result=dict(TYPE='Ethernet', NAME=name, DEVICE=name,
                BOOTPROTO='none', ONBOOT='yes')
    if cfg == 'off':
        result['ONBOOT']='no'
    elif cfg == 'dhcp':
        result['BOOTPROTO']='dhcp'
    else:
        interface = IPv4Interface(cfg)
        if '/' not in cfg:
            if interface < IPv4Interface('128.0.0.0'):
                cfg += '/8' 
            elif interface < IPv4Interface('192.0.0.0'):
                cfg += '/16'
            else:
                cfg += '/24'
                interface = IPv4Interface(cfg)
        result['IPADDR'], result['NETMASK'] = interface.with_netmask.split('/')
        _, result['PREFIX'] = interface.with_prefixlen.split('/')
    return result
    

def walk(action):
    for dirpath, _, files in os.walk('.'):
        syspath = dirpath[1:]  # remove leading '.'
        action.dirpath = dirpath
        action.syspath = syspath
        if files:
            match, mismatch, missing = filecmp.cmpfiles(dirpath, syspath, files)
            if mismatch:
                newer = [f for f in mismatch if getmtime(join(syspath, f)) > getmtime(join(dirpath, f))]
                if newer:
                    action.newer(newer)
                if len(newer) < len(mismatch):
                    newer = set(newer)
                    action.older([f for f in mismatch if f not in newer])
            if missing:
                if DEL in missing:
                    missing.remove(DEL)
                    with open(join(dirpath, DEL)) as fil:
                        to_delete = []
                        for f in fil:
                            f = f.strip()
                            if f and exists(join(syspath, f)):
                                if exists(join(dirpath, f)):
                                    print('ERROR: %s in %s, but also in repo -> ignored' % (f, DEL))
                                else:
                                    to_delete.append(f)
                        action.delete(to_delete)
                if missing:
                    action.missing(missing)

class Show:
    dirty = False

    def show(self, title, files):
        self.dirty = True
        print('%s %s:\n  %s' % (title, self.syspath, ' '.join(files)))
        
    def newer(self, files):
        self.show('get from', files)
        
    def older(self, files):
        self.show('replace in', files)
        
    def missing(self, files):
        self.show('install in', files)
        
    def delete(self, files):
        self.show('remove from', files)

class Do:
    def newer(self, files):
        for file in files:
            shutil.copy(join(self.syspath, file), join(self.dirpath, file))
        
    def older(self, files):
        for file in files:
            shutil.copy(join(self.dirpath, file), join(self.syspath, file))
        
    def missing(self, files):
        self.older(files)
        
    def delete(self, files):
        for file in files:
            os.remove(join(self.syspath, file))


IFNAMES = ['enp%ds0' % i for i in range(1,5)]

def network(doit):
    result = True
    netaddr_dict = {}
    for ifname in IFNAMES:
        with open('/sys/class/net/%s/address' % ifname) as f:
            netaddr_dict[ifname] = f.read().strip().lower()
    netaddr = netaddr_dict[IFNAMES[0]]
    action = 'doit' if doit else 'check'
    addrdict = {}
    for cfgfile in glob(CFGPATH % '*'):
        parser = ConfigParser()
        try:
            parser.read(cfgfile)
            address = parser['NETWORK']['address'].lower()
            if address in addrdict:
                print(cfgfile)
                print(addrdict[address])
                print('ERROR: duplicate address %s in above files' % address)
            addrdict[address] = cfgfile
        except Exception as e:
            print('ERROR: can not read %s: %r' % (cfgfile, e))
            result = False
    cfgfile = addrdict.get(netaddr)
    if cfgfile is None:
        print('can not find cfg file for %s' % netaddr)
        result = False
    for ntry in range(1 + bool(doit)):
        with open('/etc/hostname') as f:
            hostname = f.read().strip()
        if CFGPATH % hostname == cfgfile:
            break
        if doit:
            if ntry == 0:
                os.system('sh sethostname.sh')
            else: 
                print('ERROR: can not set host name')
                result = False
        else:
            print('host name does not match')
            break
    if not result:
        return False
    ifname = ''
    parser = ConfigParser()
    try:
        parser.read(CFGPATH % hostname)
        network = dict(parser['NETWORK'])
        address = network.pop('address', None)
        main = None
        for ifname in IFNAMES:
            content = create_if(ifname, netaddr_dict[ifname],
                                network.get(ifname, 'off'))
            with open('etc/sysconfig/network-scripts/ifcfg-%s' % ifname, 'w') as f:
                f.write('\n'.join('%s=%s' % kv for kv in content.items())+ '\n')
    except Exception as e:
        print('ERROR: can not handle %s %s: %r' % (hostname, ifname, e))
        result = False
    return result
    
print('---')
show = Show()
result = network(False)
walk(show)

if not result:
    print('fix first above errors')
elif show.dirty:
    print('---')
    answer = input('do above? ')
    if answer.lower().startswith('y'):
        network(True)
        walk(Do())
else:
    print('nothing to do')