maintainer-feedback requested: [Bug 286107] ports-mgmt/pkg: improvement request: only install files whose checksum have changed

Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-pkg (Nobody)
<pkg@FreeBSD.org> for maintainer-feedback:
Bug 286107: ports-mgmt/pkg: improvement request: only install files whose
checksum have changed
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286107



--- Description ---
Scenario:
- FreeBSD stable/14
- ports latest
- upgrading ports using 'pkg upgrade'

Result:
- All files of the old ports are removed, then all files of the updated ports
are installed
- For many ports, the contents of most files do not change at all
- This results in unnecessary disk churn, SSD wear level increase, backup size
increase, etc.

Desired result:
- 'pkg upgrade' should compute the differences between the old and the new
installed files, most likely using their checksum
- 'pkg upgrade' should then delete and add files as necessary to implement the
new pkg plist.
- Unchanged files should not be touched at all, not even their mtime.
- This would help a lot especially with the big ports: KDE, LibreOffice, ...

-- Martin