Can't setup ghcjs with stack: ghcjs version could not be determined.

[gromakovsky]

I'm trying to use stack with ghcjs. I've created dummy project (stack.yaml file is in gist, other files are hardly relevant). After that I run stack setup and get this error:

setup: The program 'ghcjs' version >=0.1 is required but the version of
/home/gromak/.stack/programs/x86_64-linux/ghcjs-0.2.0.20151029_ghc-7.10.2/src/.stack-work/install/x86_64-linux/lts-3.6/7.10.2/bin/ghcjs could not be determined.

Even if I do mv ~/.stack ~/.stack.bk; mv ~/.cabal ~/.cabal.bk I get the same error. You can take a look at the complete output of stack setup in gist. By the way, I'm running on Archlinux.

Here is gist: https://gist.github.com/gromakovsky/660735e773213b989d44

Some information about versions:

$ stack --version
Version 0.1.10.0, Git revision a25892f (2778 commits) x86_64
$ cabal --version
cabal-install version 1.22.6.0
using version 1.22.4.0 of the Cabal library
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.10.2
$ /home/gromak/.stack/programs/x86_64-linux/ghcjs-0.2.0.20151029_ghc-7.10.2/src/.stack-work/install/x86_64-linux/lts-3.6/7.10.2/bin/ghcjs --version
The Glorious Glasgow Haskell Compilation System for JavaScript, version 0.2.0.20151029 (GHC 7.10.2)

Please ask me to provide more information about my environment if you need it.

[tolysz]

Is the project you are trying to build hosted somewhere?

PATH=`stack path --bin-path  --stack-yaml $HOME/.stack/global-project/stack.yaml --resolver lts-3.17 2>/dev/null`:$PATH stack setup

I only see you are using global ghc could you try with the above? (and maybe install hscolour )

I am using my own version with patched aeson ( https://github.com/tolysz/video/blob/ghcjs/client/stack.yaml )

[mgsloan]

aupiff is also getting this, as mentioned in the #ghcjs channel. He's using the same version, ghcjs-0.2.0.20151029, so I suspect this is an issue with that particular sdist or ghcjs version.

I haven't seen such issues with the old-base sdist or fizruk's improved-base sdist. Can you please post up your particular setup-info?

[gromakovsky]

Is the project you are trying to build hosted somewhere?

It's our own project. We've just started using ghcjs, my colleagues have managed to setup it, but I get this error. Looks like we have same versions of everything (i. e. stack, cabal, ghc, ghcjs), but for some strange reason this error occurs only on my machine.

I tried using stack setup with extended PATH, but result is the same. I also tried this stack.yaml: https://github.com/tolysz/video/blob/ghcjs/client/stack.yaml but once again result is the same.

I suspect this is an issue with that particular sdist or ghcjs version

I tried running stack setup --compiler ghcjs-0.1.0.20150924_ghc-7.10.2, but it didn't help. Also, as I already told, I tried using stack.yaml referenced by @tolysz, it didn't help too. As well as this configuration:

compiler: ghcjs-0.2.0.20151001_ghc-7.10.2
compiler-check: match-exact
setup-info:
  ghcjs:
    source:
      ghcjs-0.2.0.20151001_ghc-7.10.2:
        url: "https://github.com/fizruk/ghcjs/releases/download/v0.2.0.20151001/ghcjs-0.2.0.20151001.tar.gz"

Can you please post up your particular setup-info?

Sorry, I don't know what is setup-info. Can you explain please?

[gromakovsky]

Sorry, I don't know what is setup-info. Can you explain please?

Ah, looks like it's from stack.yaml. It is in the gist: https://gist.github.com/gromakovsky/660735e773213b989d44#file-stack-yaml

Actually, as I said, the same error occurs with other configurations too (e. g. this: https://github.com/tolysz/video/blob/ghcjs/client/stack.yaml)

[akegalj]

(I have deleted something that I find irrelevant now)

EDIT: looks like I am getting this error always now (when I am running only one stack build, even with clean ghcjs boot and clean stack setup). It seems that error started appearing when I have done full update of my system. Here is the update info: https://gist.github.com/akegalj/652a4b771949148d6042 . Somehow relevant were:

[2015-12-11 15:20] [ALPM] upgraded ghc (7.10.2-1 -> 7.10.3-1)
[2015-12-11 15:20] [ALPM-SCRIPTLET] ==> All cabalized packages need to be reinstalled now.
[2015-12-11 15:20] [ALPM-SCRIPTLET] ==> See /usr/share/haskell/ for a tentative list of affected packages.
[2015-12-11 15:21] [ALPM] upgraded happy (1.19.5-3 -> 1.19.5-4)
[2015-12-11 15:19] [ALPM] upgraded alex (3.1.4-6 -> 3.1.4-7)

but there were upgrades of other packages globally installed (like haskell-data-default-instances-base and others, see gist). I don't know could this be the reason of breakage of stack ghcjs install?

EDIT EDIT:
It looks like there is a high chance that stack ghcjs breakage came from this upgrade. When I run stack build I am getting errors:

   Configuring data-default-instances-base-0.0.1...
    setup-Simple-Cabal-1.22.4.0-ghcjs-0.2.0.20151029_ghc-7.10.2: The program
    'ghcjs' version >=0.1 is required but the version of
    /home/akegalj/.stack/programs/x86_64-linux/ghcjs-0.2.0.20151029_ghc-7.10.2/bin/ghcjs
    could not be determined.

and same errors for data-default-instances-dlist-0.0.1, random-1.1, ref-tf-0.4, ... which highly correlates to haskell-* packages from upgrade gist https://gist.github.com/akegalj/652a4b771949148d6042 .

[gromakovsky]

After full system update (including update of ghc, happy and alex) I still had the same error. Stack downloaded GHC 7.10.2 and installed it into it's own directory, because system-wide GHC upgraded to 7.10.3. Then I downgraded system-wide GHC to 7.10.2 and (magic!) stack setup finished successfully! However, if then I run stack build I get similar errors like those from @akegalj comment (i. e. ghcjs version could not be determined). If I run stack build multiple times it makes some progress, but after building some packages it stops making any progress (i. e. reports this error for every package).

Finally, I removed ~/.cabal, ~/.stack, ~/.ghcjs, ~/.ghc, .stack-work and ran stack setup once again with these versions of system-wide packages:

happy 1.19.5-4
alex 3.1.4-7
ghc 7.10.2-1

Surprisingly, stack setup failed again with the same error as at the first time. So for me it now looks like this error is nondeterministic. We (I and @akegalj) couldn't understand which versions of relevant software cause this error. Even if the same set of versions it may lead to different results. For example, if problem occurres during stack build step it may fail to build a package, but after a few more tries it suddenly succeeds. Very strange…

[erikkaplun]

I'm also experiencing this problem — I never used to have this problem some time ago; perhaps an update of stack to 0.1.10 caused it? (EDIT: nope, just downgraded and the problem's still there)

@gromakovsky I can confirm the errors are non-deterministic. I didn't try stack setup but stack build always errors out while building a different dependency.

[erikkaplun]

For the record, it's also happening with ghcjs-pkg: http://pastebin.com/raw.php?i=pNbrUhcE

Also, as you can see, I tried with -j0 to rule out any race conditions, but the result appears to be the same.

[akegalj]

Interesting though, running repeatedly stack build will eventually build the whole thing. So as a workaround you can do:

until stack build; do echo "Try again!"; done

This successfully builds the whole project, despite bunch of errors/retries.

NOTE: you should modify this command to repeat only on this type of error (ie grep-ing 'ghcjs' version >=0.1 is required) and to fail otherwise.