Stack keeps warning about removed modules

[hesselink]

I removed a few modules from a package and from the cabal file. Now stack build keeps warning about them, even though it doesn't rebuild anything. Additionally, stack ghci fails to load because it tries to load the removed modules.

$ stack build
Warning: modules not listed in manuel.cabal for library component (add to other-modules):
    Manuel.Frontend.Errors.Error
    Manuel.Frontend.Errors.ErrorDetail
    Manuel.Frontend.Errors.List

$

$ stack ghci manuel
Warning: modules not listed in manuel.cabal for library component (add to other-modules):
    Manuel.Frontend.Errors.Error
    Manuel.Frontend.Errors.ErrorDetail
    Manuel.Frontend.Errors.List
Warning: modules not listed in manuel.cabal for library component (add to other-modules):
    Manuel.Frontend.Errors.Error
    Manuel.Frontend.Errors.ErrorDetail
    Manuel.Frontend.Errors.List
Warning: modules not listed in manuel.cabal for library component (add to other-modules):
    Manuel.Frontend.Errors.Error
    Manuel.Frontend.Errors.ErrorDetail
    Manuel.Frontend.Errors.List
Using main module: Package `manuel' component exe:manuel with main-is file: /Some/path/Main.hs
Configuring GHCi with the following packages: manuel
GHCi, version 7.8.3: http://www.haskell.org/ghc/  :? for help
<snip loaded packages>

<command line>:
    Could not find module ‘Manuel.Frontend.Errors.Error’
    Use -v to see a list of the files searched for.

<command line>:
    Could not find module ‘Manuel.Frontend.Errors.ErrorDetail’
    Use -v to see a list of the files searched for.

<command line>:
    Could not find module ‘Manuel.Frontend.Errors.List’
    Use -v to see a list of the files searched for.
Failed, modules loaded: none.
Prelude>

[snoyberg]

@borsboom You think this could be solved with the #838 fix? It seems to be related to the same part of the codebase (determining unlisted modules).

[hesselink]

In the meantime, is there something I can poke at to get rid of this cached information somewhere? I'd like to avoid a full stack clean, but still be able to load the package in ghci.

[chrisdone]

@hesselink I tested this out and I think it's fixed on master (see below). Can you confirm?

bash-3.2$ stack build
Warning: module not listed in test-project.cabal for library component (add to other-modules):
    Unlisted
test-project-0.1.0.0: build
[..]
Registering test-project-0.1.0.0...

bash-3.2$ rm src/Unlisted.hs 
bash-3.2$ echo 'module Lib where someFunc = print ()' > src/Lib.hs 

bash-3.2$ stack build
test-project-0.1.0.0: build
Preprocessing library test-project-0.1.0.0...
[1 of 1] Compiling Lib              ( src/Lib.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.4.0/build/Lib.o )
In-place registering test-project-0.1.0.0...
Preprocessing executable 'test-project-exe' for test-project-0.1.0.0...
[1 of 1] Compiling Main             ( app/Main.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.4.0/build/test-project-exe/test-project-exe-tmp/Main.o ) [Lib changed]
Linking .stack-work/dist/x86_64-osx/Cabal-1.22.4.0/build/test-project-exe/test-project-exe ...
test-project-0.1.0.0: install
Installing library in
/Users/chris/Work/stack/test-project/.stack-work/install/x86_64-osx/lts-3.3/7.10.2/lib/x86_64-osx-ghc-7.10.2/test-project-0.1.0.0-EF4qxsKSaC21Isf9vMkDQM
Installing executable(s) in
/Users/chris/Work/stack/test-project/.stack-work/install/x86_64-osx/lts-3.3/7.10.2/bin
Registering test-project-0.1.0.0...

bash-3.2$ stack ghci
test-project-0.1.0.0: unregistering (components added: test:test-project-test)
* * * * * * * *
The main module to load is ambiguous. Candidates are: 
Package `test-project' component exe:test-project-exe with main-is file: /Users/chris/Work/stack/test-project/app/Main.hs
Package `test-project' component test:test-project-test with main-is file: /Users/chris/Work/stack/test-project/test/Spec.hs
None will be loaded. You can specify which one to pick by: 
 1) Specifying targets to stack ghci e.g. stack ghci test-project:exe:test-project-exe
 2) Specifying what the main is e.g. stack ghci --main-is test-project:exe:test-project-exe
* * * * * * * *
Configuring GHCi with the following packages: test-project
GHCi, version 7.10.2: http://www.haskell.org/ghc/  :? for help
unknown option: 'c'
[1 of 1] Compiling Lib              ( /Users/chris/Work/stack/test-project/src/Lib.hs, interpreted )
Ok, modules loaded: Lib.
*Lib> :q
Leaving GHCi.
bash-3.2$ 

[hesselink]

@chrisdone I'm trying, but switching to stack from master seems to make stack want to reinstall a lot of packages. The reinstall then fails due to #941, which I don't think I can work around, so for now I can't test this, sorry.

[hesselink]

I've tried again but ran into another issue (#944). I'll keep trying when that one has been fixed :)

[hesselink]

I've now been able to test this with master (Version 0.1.4.1, Git revision e2152ec X86_64). I went back to before I removed the modules, and called stack build. Then I went to after I removed them, and called stack build again. I still got the warning about missing modules once:

Warning: modules not listed in manuel.cabal for library component (add to other-modules):
    Manuel.Frontend.Errors.Error
    Manuel.Frontend.Errors.ErrorDetail
    Manuel.Frontend.Errors.List

But it built ok, and stack ghci also works. The warnings also don't reappear anymore. I'll leave it up to you if this is enough of a fix.

[chrisdone]

Just once makes sense as it comes from the .hi files, then building updates the .hi files. So that seems ok.

[rvion]

@hesselink that can be closed so ?

[snoyberg]

Closing. #838 may end up improving the warning situation, but I'm not certain.

[mgsloan]

@hesselink, I pushed a commit which resolves the issue mentioned in your comment above.

[hesselink]

Thanks for the update!