Add support for cache cleanup about fmf HOT 4 CLOSED

To elaborate a bit, As a user I want fmf to

• clean after itself so my home/.cache stays clean
• clean old stuff so I free some space on disk
• fetch current remote so latest changes are present in metadata repository

At the moment we do git fetch if last fetch was more than 20 minutes ago but it is not configurable.

So how about adding option instead of command? To be a bit inspired by dnf: there is --refresh which forces metadata refresh and command 'dnf clean'

fmf --clean [time] [command] 
fmf --refresh [command]

So if you don't want to keep cache, you use --clean, fmf --clean will erase existing.
To keep just recent cache fmf --clean 1d if you recognize 1 day as recent ;)
Refresh all on fmf --refresh

from fmf.

@psss Thoughts? I'd try to implement it if you are OK with the above.

from fmf.

A couple of questions:

• Would the --clean option erase the cache before doing the command or after? With a separate command one could do both and it would be clear when the cleanup happens.
• Anything cached longer than 20 minutes is currently fetched again, so it probably does not make sense to only clean up items older than 1d, anything between 1d and 2m will not be (re)used anyway

So far the command variant seems to me as a better solution but I might be overlooking possible advantages of the option solution.

from fmf.

So far the command variant seems to me as a better solution but I might be overlooking possible advantages of the option solution.

How would you do, with single command, following?

1. As a user I want fmf to ignore cache and fetch repositories directly
   UC: I've just pushed changes to the upstream
   fmf --refresh [commnad]
2. As a user I want fmf to clean after itself so no files are left in .cache.
   fmf --clean [commnad]
   UC: I'm on shared machine / don't have much space left
3. As a user I want fmf to ignore any cache (might not be there) and clean after itself.
   fmf --refresh --clean [command]

I prefer single command as it is easier to 'alias' or recall from bash history or even copy&paste from help or IRC

Good point that --clean [time] doesn't make sense.

from fmf.