VSCode intellisense not working for solidity files when using hardhat-foundry

[tmigone]

Version of Hardhat

2.22.2

What happened?

IntelliSense in VSCode stops working when adding @nomicfoundation/hardhat-foundry plugin to a Hardhat project. Imported files wont have any definitions or types, suggestions, etc. For example the following screenshot showing import definitions not being found:

The project will build fine though.

Minimal reproduction steps

The following repo contains a project and steps for a minimal reproduction: https://github.com/tmigone/hardhat-foundry-repro

Search terms

foundry, intellisense, vscode

[kanej]

Hey @tmigone, thanks for the reproduction repo, that makes things far easier to debug.
We will investigate and get back.

[Reblixt]

Has there been any progress here?
Have the same issue and no imports works at all when i have solidity_ls_nomicfoundation lsp installed.
And when i have solidity_ls installed instead i get syntax errors on all the imports.

However these issue go away when i remove the
@nomicfoundation/hardhat-foundry
Line from hardhat.config.ts file

But then other issue arises instead.
example i get syntaxerror for all the forge-std imports.

I notice when i "go to definition" to: @nomicfoundation/hardhat-foundry
that file looks like this

export { };
//# sourceMappingURL=index.d.ts.map

I imagine that this could be the issue?

Because when i try to go to definition on Neovim i get this response

Error executing vim.schedule lua callback: /usr/share/nvim/runtime/lua/vim/lsp/util.lua:294: bad argument #1 to 'gmatch' (string expected, got nil)
stack traceback:
	[C]: in function 'gmatch'
	/usr/share/nvim/runtime/lua/vim/lsp/util.lua:294: in function 'get_lines'
	/usr/share/nvim/runtime/lua/vim/lsp/util.lua:1908: in function 'locations_to_items'
	...nvim/lazy/telescope.nvim/lua/telescope/builtin/__lsp.lua:197: in function 'handler'
	/usr/share/nvim/runtime/lua/vim/lsp/client.lua:685: in function ''
	vim/_editor.lua: in function <vim/_editor.lua:0>

In summery it expects a string but gets nil/nul/undefined instead

And in VScode i get no response at all

These is the installed dependencies i have.

{
  "devDependencies": {
    "@nomicfoundation/hardhat-chai-matchers": "^2.0.0",
    "@nomicfoundation/hardhat-ethers": "^3.0.0",
    "@nomicfoundation/hardhat-foundry": "^1.1.2",
    "@nomicfoundation/hardhat-ignition": "^0.15.0",
    "@nomicfoundation/hardhat-ignition-ethers": "^0.15.0",
    "@nomicfoundation/hardhat-network-helpers": "^1.0.0",
    "@nomicfoundation/hardhat-toolbox": "^5.0.0",
    "@nomicfoundation/hardhat-verify": "^2.0.0",
    "@typechain/ethers-v6": "^0.5.0",
    "@typechain/hardhat": "^9.0.0",
    "@types/chai": "^4.2.0",
    "@types/mocha": ">=9.1.0",
    "@types/node": ">=18.0.0",
    "chai": "^4.2.0",
    "ethers": "^6.4.0",
    "hardhat": "^2.22.5",
    "hardhat-gas-reporter": "^1.0.8",
    "husky": ">=6",
    "lint-staged": ">=10",
    "prettier": "^3.3.2",
    "solidity-coverage": "^0.8.0",
    "ts-node": ">=8.0.0",
    "typechain": "^8.3.0",
    "typescript": ">=4.5.0"
  },
  "dependencies": {
    "@openzeppelin/contracts": "^5.0.2",
    "@openzeppelin/contracts-upgradeable": "^5.0.2",
    "@openzeppelin/hardhat-upgrades": "^3.2.0",
    "dayjs": "^1.11.11",
    "dotenv": "^16.4.5",
    "zod": "^3.23.8"
  },
  "lint-staged": {
    "*.{js,css,md}": "prettier --write"
  },
  "scripts": {
    "prepare": "husky install"
  }
}

Thanks in advance! :)