# stack-clean-old
A small tool to clean away older Haskell [stack](https://docs.haskellstack.org)
snapshot builds and ghc versions, to recover diskspace.
## Usage
```
stack-clean-old [project|snapshots|ghc] [size|list|remove-version|remove-earlier-minor] [GHCVER]
```
These commands act respectively on:
- the current local **project**: `.stack-work/install/`
- the user's stack **snapshot** builds: `~/.stack/snapshots/`
- installed stack **ghc** compilers: `~/.stack/programs/`.
and the subcommands:
`size`:
prints the total size of the above directory
(`size` does not take a GHCVER argument).
`list`:
shows the total size and number of snapshots per ghc version
(the GHCVER argument is optional).
`remove-version`:
removes all snapshots for the specified ghc version
(the GHCVER argument is required).
`remove-earlier-minor`:
removes the builds/installs for previous minor ghc versions.
If GHCVER is given then only minor versions older than it are removed.
NB: If you remove all snapshot builds for a version of ghc, then you would have to rebuild again for any projects still using them, so removal should be used cautiously, but it can recover a lot of diskspace.
### Example usage
To remove project builds for ghc-8.2.2:
```
$ stack-clean-old project list
154M 8.2.2 (5 dirs)
154M 8.4.4 (5 dirs)
163M 8.6.5 (5 dirs)
$ stack-clean-old project remove-version 8.2.2
```
Remove all stack ghc-8.4 snapshot builds before 8.4.4:
```
$ stack-clean-old snapshots list 8.4
421M 8.4.1 (7 dirs)
368M 8.4.2 (6 dirs)
489M 8.4.3 (8 dirs)
799M 8.4.4 (24 dirs)
$ stack-clean-old snapshots remove-earlier-minor 8.4.4
7 dirs removed for 8.4.1
6 dirs removed for 8.4.2
8 dirs removed for 8.4.3
```
Incidently I build my projects across as many major Stackage LTS versions as possible, and collectively this piles up to a lot of diskspace: so I wrote this tool to help manage that.
### Purging older stack project builds
```
stack-clean-old project remove-older
```
This command removes older stack builds from `.stack-work/install/`.
By default it keeps 5 newest builds per ghc version.
The preservation/deletion is calculated and done per ghc version.
NB: If you regularly build your project for several branches/tags against the same LTS or ghc version then it is safer to avoid using `remove-older`.
## Installation
Run `stack install` or `cabal install`
## Contributing
BSD license
Project: https://github.com/juhp/stack-clean-old
## Warning disclaimer
Use at your own risk.
The author takes no responsibility for any loss or damaged caused by using
this tool.
Bug reports, suggestions, and improvements are welcome.