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In case you're taking feature requests, it would be useful to generate an aggregated prefix list but with some sub-prefixes removed:

Mock-up to explain what I mean:

$ echo 192.0.2.0/25 192.0.2.128/26 192.0.2.192/27 192.0.2.224/27 > prefixes.txt
$ echo 192.0.2.3/32 192.0.2.128/30 > exceptions.txt
$ aggregate6 -e exceptions.txt prefixes.txt
192.0.2.0/31
192.0.2.2/32
192.0.2.4/30
192.0.2.8/29
192.0.2.16/28
192.0.2.32/27
192.0.2.64/26
192.0.2.132/30
192.0.2.136/29
192.0.2.144/28
192.0.2.160/27
192.0.2.192/26

If on the other hand you're not taking feature requests, feel free to close this issue. In any case, thank you for this very useful tool!

$ echo 2620:0:1c00::/40 | aggregate6
Traceback (most recent call last):
File "/usr/local/bin/aggregate6", line 9, in
load_entry_point('aggregate6==0.7', 'console_scripts', 'aggregate6')()
File "/usr/local/lib/python2.7/dist-packages/aggregate6/cli.py", line 107, in main
prefix_obj = ip_network(prefix)
File "/usr/lib/python2.7/dist-packages/ipaddress.py", line 199, in ip_network
' a unicode object?' % address)
ipaddress.AddressValueError: '3236:3230:3a30:3a31:6330:303a:3a2f:3430/128' does not appear to be an IPv4 or IPv6 network. Did you pass in a bytes (str in Python 2) instead of a unicode object?

> sudo -H pip install aggregate6
Collecting aggregate6
  Downloading aggregate6-0.6.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/tmp/pip-build-JFgKf2/aggregate6/setup.py", line 52, in <module>
        reqs = [str(ir.req) for ir in install_reqs]
      File "/Library/Python/2.7/site-packages/pip/req/req_file.py", line 79, in parse_requirements
        "parse_requirements() missing 1 required keyword argument: "
    TypeError: parse_requirements() missing 1 required keyword argument: 'session'

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/tmp/pip-build-JFgKf2/aggregate6/

> pip --version
pip 8.1.1 from /Library/Python/2.7/site-packages (python 2.7)

This is on Mac OS X 10.11.3.

Do you see any chance to keep the Python 3.6 support until CentOS 7 reaches EOL at 2024-06-30?

Great tool. Very helpful. Can you explain what the -t option does? I have tried using it multiple times with and without it and it returns the same output. Just confused on what you mean by "truncate IP/mask to network/mask"?

thanks,

I'm grateful for the aggregate6 tool because Firewalld on EL8 (CentOS/RHEL) crashes when giving Ipsets containing overlapping CIDR ranges (see https://wiki.fysik.dtu.dk/it/Linux_firewall_configuration#using-ipsets-in-firewalld-on-rhel-centos-8).
Could you kindly add some extra Installation instructions for EL8, because the pip3 fails on a minimal EL8 system:

On EL8 systems you must first install some prerequisites:
$ dnf install gcc platform-python-devel