[Haskell-cafe] How to determine correct dependency versions for a library?
fremenzone at poczta.onet.pl
Fri Nov 9 17:15:26 CET 2012
Recently I started developing a Haskell library and I have a question about package dependencies.
Right now when I need my project to depend on some other package I only specify the package name
in cabal file and don't bother with providing the package version. This works because I am the
only user of my library but I am aware that if the library were to be released on Hackage I would
have to supply version numbers in the dependencies. The question is how to determine proper
I can be conservative and assume that version of libraries in my system are the minimum required
ones. This is of course not a good solution, because my library might work with earlier versions
but I don't know a way to check that. What is the best way to determine a minimal version of a
package required by my library?
I also don't see any sane way of determining maximum allowed versions for the dependencies, but
looking at other packages I see that this is mostly ignored and package maintainers only supply
lower versions. Is this correct approach?
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