On Wed, Mar 25, 2015 at 4:58 PM Anthony Cowley <acow...@gmail.com> wrote:
> > > On Mar 25, 2015, at 10:51 AM, Michael Snoyman <mich...@snoyman.com> wrote: > > > > On Wed, Mar 25, 2015 at 4:30 PM Anthony Cowley <acow...@seas.upenn.edu> > wrote: > >> On Wed, Mar 25, 2015 at 10:24 AM, Michael Snoyman <mich...@snoyman.com> >> wrote: >> > >> > >> > On Wed, Mar 25, 2015 at 4:17 PM Anthony Cowley <acow...@seas.upenn.edu> >> > wrote: >> >> >> >> The suggestion to use "cabal install --dependencies-only ..." instead >> >> of "cabal freeze" in that issue is really nicely presented. "cabal >> >> freeze" is close to the right thing, but it's just not as fully >> >> featured as "cabal install" (e.g. taking flags). >> >> >> >> As for Stackage, I think it would be helpful to cache the full build >> >> plans computed for each package in Stackage. This is most of the work >> >> my Nix tooling currently does, so it would be a big time saver. >> >> >> >> >> > >> > By "full build plans," do you mean the dist/setup-config file, or >> something >> > else? That file would be problematic since it's Cabal-library-version >> > specific IIRC. If you're looking for the full listing of deep >> dependencies >> > and versions, we can extract that from the .yaml file using the >> technique I >> > mentioned earlier. >> > >> > Michael >> >> Yes, I meant the full listing of deep dependencies. >> >> >> > I've put together a Gist with an executable that does what I described: > > https://gist.github.com/snoyberg/5b244331533fcb614523 > > You give it three arguments on the command line: > > * LTS version, e.g. 1.14 > * Name of package being checked > * true == only include dependencies of the library and executable, > anything else == include test and benchmark dependencies as well > > If that's useful, I can package that up and put it on Hackage. > > Michael > > > This is very helpfulness, thanks! There is a bootstrapping issue, though, > which is, I imagine, why both Miëtek and I have been writing much more bash > than we'd like. But perhaps this becomes part of a cabal-install-like > bootstrap.sh script to get things going. > > Anthony > Oh, that's actually a great idea. What if we had a program that: 1. takes a set of packages that needs to be installed, and an LTS version 2. computes the dependency tree 3. writes out a shell script (possibly batch program?) to wget, tar xf, and runghc Setup.hs in the correct order to get all of those packages installed As you can tell from the program I just threw together, stackage-types supports this kind of thing pretty trivially. Michael
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