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Mock » Release Notes - Mock 6.4 and Core Configs 43.2

A 'simple' chroot build environment manager for building RPMs.

A new plugin named unbreq has been added. This plugin can detect unused BuildRequires based on file access during the RPM build. This plugin is currently experimental and disabled by default.

It can be enabled in the configuration as follows:
```
config_opts['plugin_conf']['unbreq_enable'] = True
```
See the documentation page.
Added support for client certificates when using mock-hermetic-repo. This can be specified as:
```
--client-cert-for example.com /path/crt.pem /path/key.pem
```

Mock now passes --suppress-sync=yes to every systemd-nspawn call (when available, i.e., on RHEL 9 and later). This turns off any form of on-disk file system synchronization for the container payload.

This feature sets a new default for:
```
config_opts['nspawn_args'] = ['--capability=cap_ipc_lock', '--suppress-sync=yes']
```
This dramatically improves container runtime performance by up to 16% for large packages. It has little effect on building small packages.

The only drawback is that in the case of a hard shutdown (e.g., a power outage) during the build (or any other operation you do with Mock), some changes in the buildroot could be lost. As the Mock buildroot is meant to be ephemeral and reconstructed for every action, we have enabled this by default. If you want to disable this feature, you can add the following to your configuration:
```
config_opts['nspawn_args'] = ['--capability=cap_ipc_lock']
```
The buildroot_lock plugin’s error reporting has been improved. It now displays all package NVRAs that are not found in the configured DNF repositories; previously, it only displayed the first missing package from the list.
We now set module_hotfixes=true on repositories generated using --localrepo. This allows fetching packages from the local repository that are filtered out by modularity when building with --chain --localrepo <dir>.

We now execute repoquery in buildroot_lock.py as a privileged user. Otherwise, DNF5 fails with:

filesystem error: cannot create directories: Permission denied [/var/lib/mock/f44-build-repo_6596509/root/home/mockbuilder/.local/state]

RHEL+EPEL configuration files now provide a [local] repository pointing to EPEL buildroots in Koji, so users can use --enablerepo=local. The [local] repos are explicitly gpgcheck=0, as RHEL config [main] parts set gpgcheck=1 by default.
Azure Linux 2.0 configuration marked End of Life (CBL Mariner 2.0) to follow the distribution’s End of Life.
Added support for Kylin OS 11, released at the end of 2024.

Thank You!