[Haskell-cafe] Cleanup obsolete stack stuff (compiler, libraries, etc.)

Michael Snoyman michael at snoyman.com
Mon Feb 6 08:23:17 UTC 2017

On Mon, Feb 6, 2017 at 10:00 AM, Sven Panne <svenpanne at gmail.com> wrote:

> 2017-02-04 19:19 GMT+01:00 Geraldus <heraldhoi at gmail.com>:
>> I want to perform some cleanup deleting obsolete compilers located in
>> ~/.stack folder. I know stack places them into ~/.stack/programs/<platfo
>> rm>/ directory, however I think there are also should be something else
>> related, e.g. docs and libs, and especially packages that was built when I
>> used old LTS snapshots. [...]
> It's good to hear that I'm not alone with such an obvious(?) undocumented
> use case... :-) I often want to say something like "Nuke away everything
> related to nightly-X-Y-Z" (garbage-collecting away any GHC on the way, too)
> or "Nuke GHC X.Y and all related snapshots". The last time I looked at
> stack's documentation, I couldn't figure out how to do that, so from time
> to time I completely remove ~/.stack, but that can't be the recommended way
> to do this. ~/.stack gets *huge* after some time, so some easy
> administrative interface for it would be nice.

Personally, I have always just wiped out the entire ~/.stack directory when
it gets too big, I just don't have the patience to individually deal with
each snapshot directory. If you just want to get rid of the compiled
libraries, you can nuke ~/.stack/snapshots instead, but personally I've
found it convenient to get rid of my install GHCs occasionally because I
usually don't need them all anymore (e.g. I don't need GHC 7.10.2 or 7.8.4
for any code I've been working on in the past few months).

Could there be a nice `gc` command to more intelligently delete stuff that
hasn't been used recently? Probably, but I don't think the demand has been
very high for it: people seem to either not care about disk space much, or
don't mind the occasionally tactical nuke.

(FWIW: I would also periodically nuke my ~/.cabal and ~/.ghc directories in
the past.)

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