[MacPorts] #51599: main.log is never deleted with "keeplogs yes"

[MacPorts]

#51599: main.log is never deleted with "keeplogs yes"
-------------------------+--------------------------------
  Reporter:  ryandesign  |      Owner:  macports-tickets@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  base        |    Version:  2.3.99
Resolution:              |   Keywords:
      Port:              |
-------------------------+--------------------------------

Comment (by raimue):

 Truncating is a bad idea. If you run `port configure` and then `port
 build` in separate port commands, the configure output will be gone.

 Let me propose the following:

 Put the log file into `${workpath}/logs/main.log`, so it is automatically
 cleaned with the rest of the work directory. This simplifies the log file
 handling as we can always append to it until it is cleaned. If `keeplogs`
 is set, before cleaning, the log file will be moved to
 `${prefix}/var/macports/logs/YYYY-MM-DD_HH-mm-ss_main.log`, based on the
 mtime of the `main.log`. An explicit `sudo port clean --logs` would delete
 these archived log files.

-- 
Ticket URL: <https://trac.macports.org/ticket/51599#comment:8>
MacPorts <https://www.macports.org/>
Ports system for macOS