Point the @ alias at a relative path, and drop baseUrl #321

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opened 2026-09-10 14:57:55 +00:00 by jcoffey-dev · 0 comments

jcoffey-dev commented

2026-09-10 14:57:55 +00:00

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Prerequisite for #318 (typescript 5.9.3 → 7.0.2), which currently fails CI.

What was blocking it

TypeScript 7 removes baseUrl and no longer accepts a non-relative entry in paths, so #318 never got as far as our source:

tsconfig.json(19,5): error TS5102: Option 'baseUrl' has been removed. Please remove it from your configuration.
tsconfig.json(20,24): error TS5090: Non-relative paths are not allowed. Did you forget a leading './'?

A leading ./ expresses the same mapping without baseUrl — paths entries resolve against the tsconfig's own directory, which is exactly what baseUrl: "." was arranging.

This does not wait for the upgrade

Relative paths without a baseUrl has been the supported spelling since TypeScript 4.4, so this typechecks identically under the 5.9.3 we ship today. Vite resolves @ through its own resolve.alias in vite.config.ts and never consulted this setting, so the build is unaffected.

The upgrade is clear behind it

I checked rather than assumed the two reported errors were the whole story: with this change applied, TypeScript 7.0.2 typechecks both workspaces clean — web and server, exit 0 on each. server/tsconfig.json needed nothing; it has neither setting.

So #318 should go green on a rebase, with no further work.

Verification

npm run typecheck (5.9.3), npm test (1153 web tests, 168 server tests) and npm run build all pass. Typechecked separately against 7.0.2 as described above.

Merged 2026-09-10 as coffey-labs/ihasmail@aa0d594666

_{Rebuilt from: git history, session transcript.}

Prerequisite for #318 (`typescript` 5.9.3 → 7.0.2), which currently fails CI. ## What was blocking it TypeScript 7 removes `baseUrl` and no longer accepts a non-relative entry in `paths`, so #318 never got as far as our source: ``` tsconfig.json(19,5): error TS5102: Option 'baseUrl' has been removed. Please remove it from your configuration. tsconfig.json(20,24): error TS5090: Non-relative paths are not allowed. Did you forget a leading './'? ``` A leading `./` expresses the same mapping without `baseUrl` — `paths` entries resolve against the tsconfig's own directory, which is exactly what `baseUrl: "."` was arranging. ## This does not wait for the upgrade Relative `paths` without a `baseUrl` has been the supported spelling since TypeScript 4.4, so this typechecks identically under the 5.9.3 we ship today. Vite resolves `@` through its own `resolve.alias` in `vite.config.ts` and never consulted this setting, so the build is unaffected. ## The upgrade is clear behind it I checked rather than assumed the two reported errors were the whole story: with this change applied, TypeScript **7.0.2 typechecks both workspaces clean** — `web` and `server`, exit 0 on each. `server/tsconfig.json` needed nothing; it has neither setting. So #318 should go green on a rebase, with no further work. ## Verification `npm run typecheck` (5.9.3), `npm test` (1153 web tests, 168 server tests) and `npm run build` all pass. Typechecked separately against 7.0.2 as described above. **Merged** 2026-09-10 as coffey-labs/ihasmail@aa0d5946664a <sub>Rebuilt from: git history, session transcript.</sub>

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Reference: coffey-labs/ihasmail-github-archive#321