mock-1.2.18 has several bugfixes:

• copy just content of SRPM not the attributes (#1301985)
• do not fail when we cannot link default.cfg (#1305367)
• Build always fails when using --nocheck (#1327594)
• keep machine-id in /etc/machine-id (#1344305)

And several changes:

• Unconditionally setup resolver config
• use DNF for F24 chroot
• requires rpm-python
• Escape the escape sequences in PROMPT_COMMAND, improve prompt
• Use root name instead config name for backups dir
• Add MIPS personalities
• scm plugin handle better submodules

And there are two new groups of configs. There are new Mageia configs:

• mageia-cauldron-armv5tl
• mageia-cauldron-armv7hl
• mageia-cauldron-i586
• mageia-cauldron-x86_64
• mageia-6-armv5tl
• mageia-6-armv7hl
• mageia-6-i586
• mageia-6-x86_64

And there are new custom configs:

• custom-1-aarch64
• custom-1-armhfp
• custom-1-i386
• custom-1-ppc64
• custom-1-ppc64le
• custom-1-s390
• custom-1-s390x
• custom-1-x86_64

Those configs does not have any repository configured and base is empty. I.e:

config_opts['chroot_setup_cmd'] = ''

This is useful if you want to prepare the chroot yourself. Or when you use it with mockchain with --addrepo=REPOS option. This was added on request of Koschei, which will use it.