[Haskell-cafe] technical thoughts on stack

[Phil Ruffwind]

On Tue, Sep 13, 2016, at 16:24, Sven Panne wrote:
>
>    * On Windows under  a MinGW bash you get a a warning for ghci:
> 
>         $ stack --resolver=nightly-2016-07-01 exec ghci -- --version
>         Run from outside a project, using implicit global project config
>         WARNING: GHCi invoked via 'ghci.exe' in *nix-like shells
> (cygwin-bash, in particular)
>                  doesn't handle Ctrl-C well; use the 'ghcii.sh' shell
> wrapper instead
>         The Glorious Glasgow Haskell Compilation System, version 8.0.1
> 
>      But using ghcii.sh through stack doesn't work:
> 
>         $ stack --resolver=nightly-2016-07-01 exec ghcii.sh -- --version
>         Run from outside a project, using implicit global project config
> 
> D:\Benutzer\Sven\AppData\Local\Programs\stack\x86_64-windows\ghc-8.0.1\bin\ghcii.sh:
> createProcess: invalid argument (Exec format error)

My guess is that `stack.exe` executes commands using the native Windows
`CreateProcess`, which has no concept of Bash-like shell scripts (since
they are a foreign thing introduced by MinGW).  Perhaps try something
like `stack exec sh ghcii.sh` instead?  (Or `stack exec -- sh -c
<command>` if you want to be agnostic to whether `<command>` is a true
executable or just a script.)