Cross platform Haskell toolchain installer
This package provides tooling that leverages the GHC toolchain installer logic present in Stack. Its primary purposes currently is to provide a Windows installer which provides 3 executables:
stack.execabal.exehaskup.exe, which can install and run various GHC version
In the future, the goal is to have haskup.exe itself install and manage various Stack and Cabal versions.
> haskup --ghc 8.8.3 ghci
> haskup runghc Main.hs
> haskup --ghc 8.6.5 exec cmd
Commands will automatically install GHC and msys2 if necessary, and then run the command in question with a modified PATH that includes these directories.
This package provides a work in progress executable called haskwrap. This is intended for use cases where you don't want to call haskup explicitly. Instead, if you install haskwrap to a location like /usr/local/bin/ghc, running that executable will automatically invoke the real ghc behind the scenes.
Again, this is a work in progress, and is not included in the Windows installer.
This tool intentionally does minimalistic command line parsing, to allow passthrough of arguments as easily as possible to underlying tools. Restrictions:
- This tool ignores all GHC RTS options (i.e., it sets
-rtsopts=ignoreAll) - The only location where
--ghcis accepted is as the very first argument to the command - The
execcommand is only recognized immediately following--ghc VERSIONor, if that is absent, as the first argument
If you leave off the --ghc VERSION, currently the executable will default to using GHC 8.10.4. This is not good behavior. Instead, there should be a config file for the default GHC version, potentially with environment variable and local filepath overrides, and some intelligent way of setting that default value on first execution. Contributions welcome to make that happen!
I (Michael Snoyman) wrote the first version of this to get it off the ground. I welcome other contributors and maintainers on board. If you're interested, please reach out to me on just about any channel, including the Haskell Foundation Slack or this issue tracker.