"Could not load module ‘Distribution.Simple’" for Setup.hs #335
Description
Setup
I have a setup with multi cradle setup that aggregates several projects together, some of which are stack projects and other are cabal projects (but for the case being, we could consider all of them as stack projects). My hie.yaml file looks like this:
cradle:
stack:
- path: "/full/path/to/project1"
component: "project1:lib"
- path: "/full/path/to/project1/app"
component: "project1:exe:project1-exe"
- path: "/full/path/to/project2"
component: "project2:lib"
- path: "/full/path/to/project2/app"
component: "project2:exe:project2-exe"
...
Errors
Running haskell-language-server-wrapper -d -l /tmp/hie.log throws errors on the Setup.hs files of those projects. The errors are like these:
Simple Setup.hs files
File: /full/path/to/project1/Setup.hs
Hidden: no
Range: 1:7-1:26
Source: not found
Severity: DsError
Message:
Could not load module ‘Distribution.Simple’
It is a member of the hidden package ‘Cabal-3.0.1.0’.
You can run ‘:set -package Cabal’ to expose it.
(Note: this unloads all the modules in the current scope.)
with the Setup.hs file just being a simple distribution file:
import Distribution.Simple
main = defaultMain
and having the build-type of the package set to Simple in the package.yaml file.
More complex Setup.hs examples (with directory)
In more complex Setup.hs files, other modules seem to be missing:
File: /full/path/to/project2/Setup.hs
Hidden: no
Range: 7:7-7:23
Source: not found
Severity: DsError
Message:
Could not load module ‘System.Directory’
It is a member of the hidden package ‘directory-1.3.6.0’.
You can run ‘:set -package directory’ to expose it.
(Note: this unloads all the modules in the current scope.)
with the following config in the .cabal file:
Build-Type: Custom
custom-setup
setup-depends:
base >= 4.7,
Cabal >= 2.2,
directory >= 1.3
Expected behavior
I thought those files could also be checked by HLS and if not, I expected them to be directly ignored.