No modules loaded on startup for multi-module project

[rdnetto]

Steps to reproduce:

1. Open a file in a project with multiple module
2. Observe that no module are loaded in Intero, and that g:intero_load_targets = []
3. Run :InteroSetTargets and select nothing.
4. Intero will restart and load all the modules, and g:intero_load_targets will list all of them.

Expected behaviour:
All the modules should be loaded even if none are specified.

Additional notes:

• This is likely a bug in Stack, since stack ghci --help says that all modules should be loaded if none are specified
• We could workaround this by invoking the same logic as InteroSetTargets on startup, but this is quite expensive (1.7 sec), so it would be preferable to fix this upstream
  • it's not obvious why this is so expensive, when it should just be parsing the cabal file. This may be worth investigating.

Stack version:
Version 1.5.1, Git revision 776b55f2281e41e89b926eaa529a54a7f4ad20bb (5079 commits) x86_64 hpack-0.17.1
(This is from master, so I should probably repro on a released version)

[rdnetto]

Note: this may be related to commercialhaskell/stack#3310

[decentral1se]

I think this is now solved with commercialhaskell/stack@87d826a.

[rdnetto]

Awesome, can confirm it's fixed in Stack Version 1.5.1, Git revision fa258ed3ba6c078e95bdf6accfd3d866b683185f (5175 commits) x86_64 hpack-0.18.1.

(If anyone else runs into this, you'll need to checkout the latest Stack and stack install it until there's a release with the fix)