Personally I think we need something akin to Ruby's `Gemfile.lock` mechanism (ideally directly integrated into Cabal). Cheers, Simon On Sat, May 11, 2013 at 11:10:45AM +0200, Alberto G. Corona wrote:
Hi Café:
I created just now an issue in cabal-dev:
https://github.com/creswick/cabal-dev/issues/101
When compiling old developments, I wish cabal-dev to install and build dependencies that were available at a that time
I don't know if there are alternatives to solving this issue. I think that this is very useful and necessary, specially now when library updates are increasingly frequent.
Maybe this problem is already solved and I just don´t know (as is often the case, for example when, in a sudden aha moment, I reinvented cabal-install months after the release). That is the reason why I tell you about it here in order to discuss it.
motivation:
I´m installing now an old soft development. Since many of my dependencies were labeled with -any or with > , neither I neither cabal know which library versions are the right ones. By taking into account a date parameter, cabal-dev can figure out which libraries were the latest and the right ones at that time. -- Alberto.
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