How do you clean the workspace?

[zelifish]

I've tried moon run -u and moon clean but neither of them do this exactly. Using moon run -u seems to clean multiple times during a build in my dependency graph, probably once for each time my common base layer is depended upon when other sub projects end up running, which leads to flaky builds because other projects would attempt to use those artifacts after they get re-cleaned.

And moon clean doesn't end up doing anything for me, it clears 0 files from the cache when I run it. That could be expected since I'm really trying to delete the outputs of my previous build and not really the cache. I'd like to totally mimic the state on CI locally though as though it were checked out fresh since I'm just getting this setup now.

[milesj]

@zelifish moon clean by default only removes files older than 7 days. You need to manually change the --lifetime.

As for moon run, any time there is a cache hit, we clean the previous state before unpacking the cache.

[milesj]

Ah yeah, project/task level cache currently isn't managed by moon, just moon's cache is. Users typically just have a clean task for that sort of situation.

[zelifish]

ok. Is there any way that I can get the list of outputs that I've declared to make implementing clean easier? I can use pkl variables but I'd have to manually expand the globs I guess, or make sure to run rm -rf in bash to have it work out via script. If I could just get that list of expanded files that would be nice. Seems like moon is in a good position to make the task available.

[milesj]

If you're using file groups, you could use a token: https://moonrepo.dev/docs/concepts/token

[zelifish]

Meaning, I would do something like this? This was the best I could imagine so far with tokens and variables.

local someFiles = new Listing { }

fileGroups {
  aInputs = someFiles
  toClean = new Listing {
    ...someFiles
    // other things
  }
}


tasks {
  a {
    inputs = new Listing {
      "@group(aInputs)"
    }
  }

  clean {
    script = "rm -rf \(someFiles)"
  }
}

[milesj]

@zelifish You can use @group(toClean) in the script also: rm -rf @group(toClean). May be easier with command instead of script though.