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Julian Ospald 2018-10-20 09:42:25 +08:00
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README.md
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[![Build Status](https://travis-ci.org/haskell/ghcup.svg?branch=master)](https://travis-ci.org/haskell/ghcup)
[![license](https://img.shields.io/github/license/haskell/ghcup.svg)](COPYING)
[`cabal-install`](https://hackage.haskell.org/package/cabal-install) follows the UNIX philosophy of [do one thing and do it well](https://en.wikipedia.org/wiki/Unix_philosophy#Do_One_Thing_and_Do_It_Well): it builds your project by managing your dependencies. However, `cabal-install` does not download `ghc` if one is needed, although it can demand that [a specific version](https://cabal.readthedocs.io/en/latest/nix-local-build.html#cfg-flag---with-compiler) of `ghc` is available. Unfortunately, many operating systems do not offer a way to install multiple versions of `ghc`.
`ghcup` makes it easy to install specific versions of `ghc` on GNU/Linux, and can also bootstrap a fresh Haskell developer environment from scratch.
It follows the unix UNIX philosophy of [do one thing and do it well](https://en.wikipedia.org/wiki/Unix_philosophy#Do_One_Thing_and_Do_It_Well).
Similar in scope to [rustup](https://github.com/rust-lang-nursery/rustup.rs), [pyenv](https://github.com/pyenv/pyenv) and [jenv](http://www.jenv.be).
@ -40,6 +39,9 @@ export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$HOME/.local/bin:$PATH"
See `ghcup --help`.
Generally this is meant to be used with [`cabal-install`](https://hackage.haskell.org/package/cabal-install), which
handles your haskell packages and can demand that [a specific version](https://cabal.readthedocs.io/en/latest/nix-local-build.html#cfg-flag---with-compiler) of `ghc` is available, which `ghcup` can do.
## How
Installs a specified GHC version into `~/.ghcup/ghc/<ver>`, and places `ghc-<ver>` symlinks in `~/.ghcup/bin/`.