release_process/custom apt repo: improve #workflow-merge-main-branch section
Originally created by @CyrilBrulebois on #16580 (Redmine)
APT_repository/custom/#workflow-merge-main-branch
currently tells the
developer to run stuff but without being exactly precise in what one
should do. It would be great to have both first steps automated and
ready to be copied/pasted like the third step.
<a id="workflow-merge-main-branch"></a>
Merging a main branch
----------------------
When a Git *main* branch (`devel`, `testing`, `stable`,
`feature/jessie`) is merged into another *main* branch, the corresponding
operation must be done on the APT suites.
1. Save the list of packages currently present in the APT suite we
want to merge *into*, e.g. `reprepro list devel`.
2. Make sure you are not going to overwrite newer packages with
older ones (hint: use the `tails-diff-suites` script).