base-compat-migrate alternatives and similar packages
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Semantic CPP feature macros for base
Do you think we are missing an alternative of base-compat-migrate or a related project?
This library is meant as a temporary migration library when moving a
upgrading it. Replace
in the rest of the README if you want to use that library instead.
base-compat defines backwards compatible versions of some base
modules; If you for example want to make sure
import Prelude does
the same thing on all GHC versions you can instead
Prelude.Compat. If a Compat module exists it means it has some
backwards compatibility fix, it also re-exports everything that is
unchanged from the corresponding base module.
base-compat notably does not have Compat modules for every base module so you often need to depend on both base and base-compat. The standard recommended work-flow is to build your project with the oldest GHC you want to support and add Compat imports accordingly.
If you don't have quick access to old GHCs it can be error-prone to migrate to upgrade base-compat since you need to look through all base imports to see if you should be using Compat versions instead.
This library offers a different work flow:
- Make sure you are using a GHC version compatible with this project (At the time of writing it is GHC 8.4.1)
- Replace any
base-compatdependencies in your project with
default-extensions: NoImplicitPreludeto each build component (libraries, executables, test suites, benchmarks).
- Compile your project and fix issues:
- Add any needed
- If a
basemodule can't be found change the import to the
- Add any needed
- Finally, replace the
Whenever you wish to support newer versions of
you can repeat these steps.
Common Issues with Solutions
- If your package declares Paths modules it won't compile without access to base. You can drop the Paths module until the affected component builds, and then add it again along with the base dependency.
base-compat-migrate re-exports modules, we depend on minor
base-compat. A new minor version of either
may require a new release of this library. This project's cabal file
is generated by compiling this package with
stack build with stack and then running the