[Haskell-cafe] Offline compilation with Stack/Cabal

[Jan von Löwenstein]

If anybody else is interested.
For now, I settled with a Stack based solution.

`STACK_ROOT=<some-temp-folder> stack build --dry-run --prefetch`

works like a charm. What I didn't tackle yet is having multiple ghc
installations in that folder. Somehow I will find a solution for that as
well.

For now I live with the fact that

`STACK_ROOT=<extracted-archive-from-prior-step> stack build --install-ghc`

will connect to the internet to download ghc.

Thanks for all the responses. I'll send an update when the ghc thing is
solved as well.

Best
Jan

Herbert Valerio Riedel <hvriedel at gmail.com> schrieb am Do., 24. Nov. 2016
um 22:48 Uhr:

> Hi,
>
> On 2016-11-24 at 07:57:57 +0100, Jan von Löwenstein wrote:
> > Consider the following use case:
> > I have to ship a Haskell application as source, bundled with its
> > dependencies and a script that can produce the binary on a machine
> without
> > internet connectivity.
>
> This situation is not that uncommon; one example is when you have
> build-bots which a more or less cut off from the internet (such as
> Ubuntu's launchpad buildfarm)
>
> > Is that possible with Stack or Cabal?
> > Any pointers would be much appreciated.
>
> > Ideally I would like to build each dependency package individually. That
> > way I could cache results per Haskell package and don't need to rebuild
> > dependencies until they actually change.
>
> This sounds like something I'd use cabal's filesystem-local repository
> feature[1] for, and it should be possible to specify such local
> repositories in your `cabal.config` or `cabal.project`[2] files to
> produce a self-contained source distribution.
>
> If you're interested in pursuing this approach or have any questions
> about it, let me know!
>
>
>  [1]:
> http://cabal.readthedocs.io/en/latest/installing-packages.html#repository-specification
>  [2]: http://cabal.readthedocs.io/en/latest/nix-local-build-overview.html
>
> Cheers
>
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