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README
Policeman
๐ฎ Policeman is the Kowainik's Bristol Haskell Hackathon project.
๐ The current status is MVP, though it could already be used on ordinary cases.
Policeman
assists to properly choose the next version number according to
PVP (Packaging Version Policy) for the Haskell packages based on the
semantical changes to the interface.
For a better understanding of the project basis and implementation details please refer to the following blog post:
Prerequisites
Policeman heavily uses some modern features of the Haskell compiler
GHC.
Therefore, in order to start using Policeman
on the projects, you are required
to have the following set:
- Global GHC version
8.8
and higher - Support of GHC
8.8
and higher in your current project and the version you wish to compare to - cabal build tool version
3.0
or higher installed on your machine
Installation
The initial beta version of Policeman
is already available on Hackage.
To install it locally you need to execute the following commands:
cabal update
cabal install policeman
Alternatively, you can install the Policeman
tool from the sources. For
achieving that, you have a couple of options.
First one is to fetch the repo using cabal
:
cabal get -s policeman
Or, you can clone the directory directly from GitHub:
git clone https://github.com/kowainik/policeman.git
The next steps are identical in both option. You need to step into the directory:
cd policeman
And finally, build and install the tool using cabal
:
cabal install policeman:exe:policeman
How to use
By default, Policeman aims to compare your local version with the latest available Hackage version of the package. It grabs the information about your package automatically, so no need to provide that. That means that the simplest command looks like this:
policeman
It will output the suggested new version (if applicable) based on your local changes compared to the Hackage version.
Alternatively, you can provide the Hackage version you are willing to compare
against. For that purpose, you can use -p | --previous
option. For example:
policeman --previous "0.1.0.0"
Acknowledgement
Icons made by Freepik from www.flaticon.com is licensed by CC 3.0 BY.
*Note that all licence references and agreements mentioned in the policeman README section above
are relevant to that project's source code only.