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Build: Output package type declarations (#18942)
Output TypeScript declaration files (`.d.ts`) from package sources and expose them with published packages.
- Upgrade to `typescript@3.8`.
- Add bin for typechecking changed packages.
- Remove `lint-types` script, replaced by `build:package-types`.
- Restructure TypeScript configuration:
- One base `tsconfig.base.json` that packages extend. This is not a project, it's only for extension.
- A root `tsconfig.json` that references all typed packages.
- Typed packages output their types at `build-types` and expose them in the published package.
- Use _project references_ to work within the monorepo.
See https://www.typescriptlang.org/docs/handbook/project-references.html
- Fix/improve some type issues.
TypeScript declaration files will be managed via `tsc --build`, the TypeScript compiler build tool for composite projects. `tsc` will manage determine the correct order to build packages so that dependencies are satisfied and rebuild only when necessary.
Additional packages can opt-in to typing by (this is documented in a new section in `packages/README.md`):
- Adding `tsconfig.json` in their package directory.
- Updating their `package.json` to point to the types: `{ "types": "build-types" }`.
- Adding a reference to the root `tsconfig.json`.- Loading branch information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| /** | ||
| * External dependencies | ||
| */ | ||
| const _ = require( 'lodash' ); | ||
| const path = require( 'path' ); | ||
| const fs = require( 'fs' ); | ||
| const execa = require( 'execa' ); | ||
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| /* eslint-disable no-console */ | ||
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| const repoRoot = path.join( __dirname, '..', '..' ); | ||
| const tscPath = path.join( repoRoot, 'node_modules', '.bin', 'tsc' ); | ||
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| // lint-staged passes full paths to staged changes | ||
| const changedFiles = process.argv.slice( 2 ); | ||
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| // Transform changed files to package directories containing tsconfig.json | ||
| const changedPackages = _.uniq( | ||
| changedFiles.map( ( fullPath ) => { | ||
| const relativePath = path.relative( repoRoot, fullPath ); | ||
| return path.join( ...relativePath.split( path.sep ).slice( 0, 2 ) ); | ||
| } ) | ||
| ).filter( ( packageRoot ) => | ||
| fs.existsSync( path.join( packageRoot, 'tsconfig.json' ) ) | ||
| ); | ||
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| try { | ||
| execa.sync( tscPath, [ '--build', ...changedPackages ] ); | ||
| } catch ( err ) { | ||
| console.error( err.stdout ); | ||
| process.exitCode = 1; | ||
| } | ||
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| /* eslint-enable no-console */ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| { | ||
| "extends": "../tsconfig.base.json", | ||
| "compilerOptions": { | ||
| "module": "commonjs", | ||
| "esModuleInterop": true, | ||
| "target": "ES6", | ||
| "lib": [ "ES6", "ES2020.string" ], | ||
| "rootDir": ".", | ||
| "declarationMap": false, | ||
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| // We're not interested in the output, but we must generate | ||
| // something as part of a composite project. Use the | ||
| // ignored `.cache` file to hide tsbuildinfo and d.ts files. | ||
| "outDir": ".cache" | ||
| }, | ||
| "files": [ "./api-docs/update-api-docs.js" ] | ||
| } |
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