feat: add Deno language server support - #1778
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Add a Deno language server backed by the Deno CLI's built-in `deno lsp`, serving TypeScript/JavaScript in Deno projects. Unlike the plain typescript-language-server it understands Deno module resolution (npm:/jsr:/https: imports) and the `Deno.*` global namespace. It is experimental and must be selected explicitly via `language_servers: [deno]`; it overlaps the TypeScript server on file extensions, so it is not auto-detected. Requires the `deno` CLI on PATH. Tests run in CI: the `deno` marker joins the other-langs batch, which now installs Deno via denoland/setup-deno. Off-CI and wherever the CLI is absent they skip through the central conftest guard, following the existing pattern for toolchain-gated language servers.
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Summary
Adds a Deno language server backed by the Deno CLI's built-in
deno lsp, serving TypeScript/JavaScript in Deno projects. Unlike the plain typescript-language-server it understands Deno module resolution (npm:/jsr:/https:imports) and theDeno.*global namespace.It is experimental and must be selected explicitly via
language_servers: [deno]— it overlaps the TypeScript server on file extensions (.ts/.tsx/.js/.jsx/…), so it is not auto-detected. Requires thedenoCLI on PATH (it bundles the language server).This is a fresh implementation against the current
DependencyProviderarchitecture, following.serena/memories/adding_new_language_support_guide.md. (There is an older, stalled PR #1048 from before that refactor; this does not build on it and deliberately avoids the auto-detect / replace-TypeScript behaviour that overlapping extensions can't disambiguate.)Changes
src/solidlsp/language_servers/deno_language_server.py— the language server (deno lsp, single-path dependency provider, TS-family language ids)src/solidlsp/ls_config.py—DENOenum, file-extension matcher, factory wiring, experimental flagtest/solidlsp/deno/test_deno_basic.py+test/resources/repos/deno/test_repo/— tests + a minimal Deno repopyproject.toml—denopytest markerREADME.md,docs/01-about/020_programming-languages.md,CHANGELOG.md— docsTesting
Verified locally against
deno 2.9.0:deno lspreturns document symbols and resolves cross-file go-to-definition and find-references on the test repo.CI note: the
deno-marked test job needsdenoinstalled (e.g.denoland/setup-deno) — happy to add that here or as a follow-up.Checklist
CONTRIBUTING.mdregarding the scope of PRs (isolated addition of a new language server).CHANGELOG.md.