Visual Studio Code is a popular open source code editor from Microsoft with extension support.
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Using in Nix based projects
If your project provides a flake.nix along with a development shell, it can be developed on VSCode using one of the two ways (prefer the 2nd way):
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Open VSCode from a terminal, inside of a devshell (i.e.,
nix develop -c code .), or - Setup direnv and install the direnv VSCode extension.
.vscode folder
You can persist Nix related extensions & settings for VSCode in the project root’s .vscode folder (see example). This enables other people working on the project to inherit the same environment as you.
Working on direnv-activated projects
If you use direnv, it is rather simple to get setup with VSCode:
Once you have cloned your project repo and have activated the direnv environment (using `direnv allow), you can open it in VSCode to develop it:
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Launch VSCode, and open the
git clone’ed project directory as single-folder workspace- NOTE: If you are on Windows, you must use the Remote - WSL extension to open the folder in WSL.
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When prompted by VSCode, install the workspace recommended extensions.
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If it doesn’t prompt, press Cmd+Shift+X and search for
@recommendedto install them all manually.
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If it doesn’t prompt, press Cmd+Shift+X and search for
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Ensure that the direnv extension is fully activated. You should expect to see this in the footer of VSCode:
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For Haskell projects: Once direnv is activated (and only then) open a Haskell file (
.hs). You should expect haskell-language-server to startup, as seen in the footer:
- Once this processing is complete, all IDE features should work.
- The experience is similar for other languages; for Rust, it will be rust-analyzer.
To give this a try, here are some sample repos: