| name | install-lsps |
| description | Install language servers (gopls, typescript-language-server, pyright, rust-analyzer) and their prerequisite toolchains (Go, Node/npm, rustup) so the lsp tool works. Use when the user asks to enable or install LSP / language-server support, when lsp_enable reports a missing toolchain, or when the lsp tool reports no language server is installed. |
Install LSPs
Enable the lsp tool for a language by installing its language server — and,
when the server install needs it, the underlying toolchain.
Rules
- Everything here is consent-gated: only act on the user's explicit go-ahead,
and confirm each toolchain install separately — those are system-level
changes, not part of whatever task prompted this.
- If the user declines, stop. If they ask not to be offered again, call
lsp_enable with {"language": "<language>", "action": "dismiss"}.
- Prefer the
lsp_enable tool over bash whenever the toolchain already
exists; reach for bash only for the prerequisites lsp_enable refuses to
install itself.
Per language
Work the ladder for each language the user wants:
- Check what is missing. Server binaries:
gopls,
typescript-language-server, pyright-langserver (or
basedpyright-langserver), rust-analyzer — also look in ~/go/bin and
~/.cargo/bin, which the lsp tool searches even when they are off PATH.
Toolchains: go, npm, rustup.
- Toolchain present → call
lsp_enable with
{"language": "<go|typescript|python|rust>"} and you are done; it runs the
right server install and verifies the binary resolves.
- Toolchain missing → show the user the command you intend to run, get
their confirmation, run it in bash, then return to step 2.
- Verify with a real
lsp query (documentSymbol on an actual source
file). The first query per workspace can take up to a minute while the
server indexes; that is normal.
Toolchain installs (step 3 reference)
Go (for gopls):
brew install go
sudo apt-get install -y golang-go
Or the official downloads at https://go.dev/dl for anything else.
Node/npm (for typescript-language-server and pyright):
brew install node
sudo apt-get install -y nodejs npm
Or nvm (https://github.com/nvm-sh/nvm) when the user prefers per-user installs.
rustup (for rust-analyzer):
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
This is the official rust installer; show the user the command before running
it and follow its printed PATH instructions afterwards.
Notes
go install drops gopls in ~/go/bin and rustup drops rust-analyzer in
~/.cargo/bin. The lsp tool finds both without PATH changes; other tools
may still want a PATH entry.- All of this can also happen at install time:
npx @weave-os/router --pi --lsp go,typescript,python,rust.
