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deno/cli/tsc
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Nathan Whitaker 08f5e797b6
fix(check/lsp): fall back to @types/* packages if npm package doesn't have types (#28185) 
Fixes https://github.com/denoland/deno/issues/27569.
Fixes https://github.com/denoland/deno/issues/27215.

This PR makes it so type resolution falls back to looking for definitely
typed packages (`@types/foo`) if a given NPM package does not contain
type declarations.

One complication is choosing _which_ version of the `@types/*` package
to use, if the project depends on multiple versions. The heuristic here
is to try to match the major and minor versions, falling back to the
latest version. So if you have
```
@types/foo: 0.1.0, 0.2.0, 3.1.0, 3.1.2, 4.0.0
foo: 3.1.0
```
we would choose `@types/foo@3.1.2` when resolving types for `foo`.

---

Note that this only uses `@types/` packages if you _already_ depend on
them. So a follow up to this PR could be to add a diagnostic and
quickfix to install `@types/foo` if we don't find types for `foo`.
2025-02-19 23:55:06 +00:00
..
dts fix: move extension file declarations to cli/tsc/dts (#28180) 2025-02-19 02:53:21 +01:00
00_typescript.js perf(lsp): make auto-imports a little faster (#28106) 2025-02-17 08:55:01 -05:00
97_ts_host.js perf(lsp): make auto-imports a little faster (#28106) 2025-02-17 08:55:01 -05:00
98_lsp.js perf(lsp): add built-in tracing support for the LSP (#27843) 2025-02-12 08:40:40 -08:00
99_main_compiler.js refactor: remove tsc snapshot (#28056) 2025-02-11 15:36:07 +01:00
_analyze_types_node.ts chore: Happy New Year 2025 (#27509) 2024-12-31 19:12:39 +00:00
compiler.d.ts chore: Happy New Year 2025 (#27509) 2024-12-31 19:12:39 +00:00
diagnostics.rs fix(check): npm resolution errors to tsc diagnostics (#28174) 2025-02-18 21:44:49 +00:00
mod.rs fix(check/lsp): fall back to @types/* packages if npm package doesn't have types (#28185) 2025-02-19 23:55:06 +00:00
README.md feat: TypeScript 5.4 (#23086) 2024-03-26 18:52:57 -04:00

README.md

tsc

This directory contains the typescript compiler and a small compiler host for the runtime snapshot.

How to upgrade TypeScript.

The files in this directory are mostly from the TypeScript repository. We currently (unfortunately) have a rather manual process for upgrading TypeScript. It works like this currently:

  1. Checkout denoland/TypeScript repo in a separate directory.
  2. Add Microsoft/TypeScript as a remote and fetch its latest tags
  3. Checkout a new branch based on this tag.
  4. Cherry pick the custom commit we made in a previous release to the new one.
  5. This commit has a "deno.ts" file in it. Read the instructions in it.
  6. Copy typescript.js into Deno repo.
  7. Copy d.ts files into dts directory.
  8. Review the copied files, removing and reverting what's necessary

So that might look something like this:

git clone https://github.com/denoland/TypeScript.git
cd typescript
git remote add upstream https://github.com/Microsoft/TypeScript
git fetch upstream
git checkout v3.9.7
git checkout -b branch_v3.9.7
git cherry pick <previous-release-branch-commit-we-did>
npm install
npx hereby
rsync built/local/typescript.js ~/src/deno/cli/tsc/00_typescript.js
rsync --exclude=protocol.d.ts --exclude=tsserverlibrary.d.ts --exclude=typescriptServices.d.ts built/local/*.d.ts ~/src/deno/cli/tsc/dts/