stack ghci with a test component does not build test dependencies

[parsonsmatt]

General summary/comments (optional)

stack ghci doesn't load dependencies from the test-suite if you select a test-suite target and the test-suite has not been built yet.

This may also require the package having not been built at all in the global package cache yet.

More observations:

If you do a stack ghci in the reproduction repo before doing a stack build, it loads the library component fine. But if you do a stack ghci stack-ghci-repro:test:stack-ghci-repro-test, it fails to load the library as a dependency.

Steps to reproduce

$ git clone https://www.github.com/parsonsmatt/stack-ghci-repro
$ cd stack-ghci-repro
$ stack ghci stack-ghci-repro:test:stack-ghci-repro-test
< observe the problem>
$ stack test
$ stack ghci stack-ghci-repro:tests:stack-ghci-repro-test
< note that it is fixed >

Expected

I expected it to notice that it was in a test-suite, ensure that it has loaded and downloaded all of the test suite dependencies, and launched a GHCi shell correctly.

Actual

$ stack ghci stack-ghci-repro:test:stack-ghci-repro-test
The following GHC options are incompatible with GHCi and have not been passed to it: -threaded
Configuring GHCi with the following packages: stack-ghci-repro
Using main module: 1. Package `stack-ghci-repro' component test:stack-ghci-repro-test with main-is file: /home/matt/Projects/stack-ghci-repro/test/Spec.hs
GHCi, version 8.2.2: http://www.haskell.org/ghc/  :? for help
<command line>: cannot satisfy -package hedgehog-0.5.1
    (use -v for more information)

Stack version

$ stack --version
Version 1.7.1, Git revision 681c800873816c022739ca7ed14755e85a579565 (5807 commits) x86_64 hpack-0.28.2

Method of installation

• Official binary, downloaded from stackage.org or fpcomplete's package repository

[ncaq]

Is reproduce correct?
stack ghci require file path.

% stack ghci stack-ghci-repro:tests:stack-ghci-repro-test
Error parsing targets: Directory not found: stack-ghci-repro:tests:stack-ghci-repro-test
Note that to specify options to be passed to GHCi, use the --ghci-options flag

[parsonsmatt]

Good catch @ncaq I've fixed the reproduction steps.

[mgsloan]

I haven't tried your repro to verify, but this is likely a duplicate of #2790 Would definitely be a nice thing to fix! The workaround for now is `stack ghci stack-ghci-repro:lib stack-ghci-repro:stack-ghci-repro-test`. This does mean that the library code also gets loaded into ghci, though, and may not work if the library stanza and test stanza have conflicting options.

…

On Tue, May 22, 2018 at 11:04 AM, Matt Parsons ***@***.***> wrote: Good catch @ncaq <https://github.com/ncaq> I've fixed the reproduction steps. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#4031 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABYKrpR7z3Zy_XlH5sWLv9ipfTKGAjMks5t1FNGgaJpZM4UFaKe> .

[parsonsmatt]

It's not exactly a duplicate -- in that case, it seems like the problem is the missing library dependency. But in this case, it's an entry in the build-depends of the test-suite.

[mgsloan]

Ah, interesting! Yes, I think this is a related issue, not a duplicate.

[mpilgrem]

I am closing this issue given the passage of time and because I could not reproduce it with Stack 2.15.5. A simple one-package project foo has a test suite that depends on the main library:

> stack new foo
> cd foo
> stack ide targets
> stack ghci foo:test:foo-test
Using main module:
1.  Package foo, component foo:test:foo-test, with main-is file: ...\foo\test\Spec.hs.

foo> configure (lib + test)
foo> build (lib + test) with ghc-9.6.4
foo> copy/register
foo> Test running disabled by --no-run-tests flag.
Configuring GHCi with the following packages: foo.
Ok, two modules loaded.
Loaded GHCi configuration from ...\ghci-script\30a2d50d\ghci-script
ghci> main
Test suite not yet implemented
ghci>