new-run not running the executable

[dagit]

I'm testing with the 2.0 branch. My package built successfully and has one executable section. The new-run command correctly checks if things are up to date and rebuilds them, but it is not running the executable. I added printouts in main that I never see and the program should block on a getContents but it doesn't do that either. I've tried adding exe:mypkg to the new-run command and it doesn't change the behavior.

@dmwit

[ezyang]

Looking at CmdRun.hs it looks like it's just not implemented. CC @dcoutts. I think this should be easy to fix. No it's not see below.

[ezyang]

No, it's not so easy to fix. From @dcoutts:

Ok, so the runProjectPreBuildPhase should return the resolved targets selected. That'd be most direct. I'm doing some refactoring in ProjectOrchestration so I can do this.

runProjectPreBuildPhase still does not return the resolved targets selected, so it needs to be refactored to do so. Duncan did a bunch of refactoring (the latest commit of which was 1022c14) but this change still does not seem to be done.

[m-renaud]

This isn't working for me using cabal-install 2.0.0.1.

Versions:

$ cabal --version
cabal-install version 2.0.0.1
compiled using version 2.0.1.1 of the Cabal library

Steps to reproduce:

Create new executable project, cabal run x works as expected, cabal new-run only builds, does not run executable.

$ cabal init -p x --is-executable -n -m
$ cabal run x
...
[1 of 1] Compiling Main             ( Main.hs, dist/build/x/x-tmp/Main.o )
...
Running x...
Hello, Haskell!

$ cabal new-run x
...
[1 of 1] Compiling Main             ( Main.hs, /home/mrenaud/tmp/cabal/dist-newstyle/build/x86_64-linux/ghc-8.2.2/x-0.1.0.0/c/x/build/x/x-tmp/Main.o )
Linking /home/mrenaud/tmp/cabal/dist-newstyle/build/x86_64-linux/ghc-8.2.2/x-0.1.0.0/c/x/build/x/x ...

Let me know if there's any other information you need, thanks!

[hvr]

@m-renaud see #5074