[drupal] change database settings

def check_match(regex, line, type, value):
    m = regex.match(line)
    if m:
        dj.log_info('found: %s' % m.group(0))
        
        line = '      \'%s\' => \'%s\', \n' % (type, value)
        dj.log_info('replaced: %s' %line)
        
        return line
    
    return line

path = 'path-to-settings.php'
db_name = 'db-name'
db_pass='db-password'

if os.path.isfile(path):
    with open(path) as f:
        content = f.readlines()
        
        out = []
        
        database = re.compile('      \'database\' => \'(.*)\'')
        username = re.compile('      \'username\' => \'(.*)\'')
        password = re.compile('      \'password\' => \'(.*)\'')
        
        for line in content:
            line = check_match(database, line, 'database', db_name)
            line = check_match(username, line, 'username', db_name)
            line = check_match(password, line, 'password', db_pass)
            
            out.append(line)
      
    f = open(path,'w')
    for line in out:
        f.write(line)
    
    f.close()