Installed Lean Copilot correctly, but upon import receive error message that Lean Copilot can't be found in the search path

[melancholyaeon]

Hi Lean Copilot Team,

I'm using VS Code, the Lean extension (4.22.0) & Python 3.12.7 on Linux (TuxedoOS 4, a Kubuntu spin of Ubuntu LTS 24.04.1, Noble Numbat).

After following your instructions exactly, I see LeanCopilot is correctly installed in the correct path. The lake build runs successfully and the lake manifest is updated correctly.

Typing "i" at the top of my file, I can easily choose import and LeanCopilot from the dropdown list. However, I receive the error message shown in the screenshot. It seems I need to create or place a LeanCopilot.olean file in my Lean project directory.

So it seems part of Lean 4 sees the Copilot, but Lean is not building the olean file.

Alas your instructions don't give me a step for this. What am I missing here? I'm sure it's a simple step.

Please advise.

Thanks!
MelancholyAeon

[Peiyang-Song]

Seems to be an import issue. I see that in the infoview there are several search paths listed. Does the Lean Copilot package indeed appear under the .lake folder?

[melancholyaeon]

Hi Peiyan-Song,

Thanks for your quick response! Yes, it is an import issue; and yes, the Lean Copilot package is nested under the .lake folder. Please see attached screenshot of my Dolphin.

What's your suggested next step, please? What is the correct method to get the the .olean file created or where to enter the full path to LC manually? Eager to get this running! It's such an exciting concept. Can't wait.

Thanks,
MelancholyAeon

[Peiyang-Song]

I see, so the problem is that though the Lean Copilot package is under .lake, it does not seem to be built? In that case, have you tried to remove the Lean Copilot folder first, and then use lake update to get the Lean Copilot package again? Then if Lean Copilot is a dependency necessary for your Lean project, a lake build should compile the Lean Copilot package in addition to your main project.

[melancholyaeon]

Ty! While I try this again, would you please point me to any logs that show me why the .olean build isn’t happening? 🙏

Please see the logs I currently have attached. :)
lake-update-log.txt
lake-build-log.txt

[Peiyang-Song]

Sure, I had this guess that the build may not be happening because the original error message suggested that either the package or the .olean from the package is not there. Since the package is indeed there, I guessed it's the .olean files that were not built.

From the logs you attached, though, it seems that both lake update and lake build succeeded, yet you encountered the problem in the screenshot when you open a file? This is a bit strange. The only suspicious thing I see from the log is from the lake update part. If you have indeed removed the Lean Copilot folder first, and then ran lake update, then lake update should get Lean Copilot for you in addition to Mathlib4, given that your project actually uses Lean Copilot as a dependency. But seems from the log that it only got Mathlib4 for you.

[melancholyaeon]

Thanks Peiyang-Song!

Should I try deleting the Lean copilot folder again? Is that your suggestion? Because I have tried that. What is the next step you suggest? What else could cause a failure to create the .olean file? Ty!

[melancholyaeon]

Hi again, Peiyang-Song,

Very grateful for your help so far! Now I'm wondering if I have an error in my lake ile.toml -- Could that be the issue?
What are your thoughts?

name = "BTree4LeanFortune"
version = "0.1.0"
defaultTargets = ["btree4leanfortune"]
moreLinkArgs = ["-L./.lake/packages/LeanCopilot/.lake/build/lib", "-lctranslate2"]

[[require]]
name = "mathlib"
git = "https://github.com/leanprover-community/mathlib4.git"

[[require]]
name = "LeanCopilot"
git = "https://github.com/lean-dojo/LeanCopilot.git"
rev = "main"

[[lean_lib]]
name = "BTree4LeanFortune"

[[lean_exe]]
name = "btree4leanfortune"
root = "Main"