feat(ts-next)!: multiple configuration files in extends

- https://devblogs.microsoft.com/typescript/announcing-typescript-5-0-beta/#supporting-multiple-configuration-files-in-extends Signed-off-by: Lexus Drumgold <[email protected]>
flex-development · Feb 5, 2023 · de15f9b · de15f9b
1 parent 5b50a50
commit de15f9b
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Showing 2 changed files with 8 additions and 6 deletions.
diff --git a/src/interfaces/__tests__/tsconfig.spec-d.ts b/src/interfaces/__tests__/tsconfig.spec-d.ts
@@ -3,7 +3,7 @@
  * @module tsconfig-types/interfaces/tests/TSConfig
  */
 
-import type { JsonObject } from '@flex-development/tutils'
+import type { JsonObject, OneOrMany } from '@flex-development/tutils'
 import type BuildOptions from '../build-options'
 import type CompilerOptions from '../compiler-options'
 import type ProjectReference from '../project-reference'
@@ -45,10 +45,10 @@ describe('unit:interfaces/TSConfig', () => {
       .toEqualTypeOf<string[] | undefined>()
   })
 
-  it('should match [extends?: string]', () => {
+  it('should match [extends?: OneOrMany<string>]', () => {
     expectTypeOf<TestSubject>()
       .toHaveProperty('extends')
-      .toEqualTypeOf<string | undefined>()
+      .toEqualTypeOf<OneOrMany<string> | undefined>()
   })
 
   it('should match [files?: string[]]', () => {

diff --git a/src/interfaces/tsconfig.ts b/src/interfaces/tsconfig.ts
@@ -3,7 +3,7 @@
  * @module tsconfig-types/interfaces/TSConfig
  */
 
-import type { JsonObject } from '@flex-development/tutils'
+import type { JsonObject, OneOrMany } from '@flex-development/tutils'
 import type BuildOptions from './build-options'
 import type CompilerOptions from './compiler-options'
 import type ProjectReference from './project-reference'
@@ -45,9 +45,11 @@ interface TSConfig extends JsonObject {
   exclude?: string[]
 
   /**
-   * Path to configuration file to inherit from.
+   * Configuration file(s) to inherit from.
+   *
+   * @see https://devblogs.microsoft.com/typescript/announcing-typescript-5-0-beta/#supporting-multiple-configuration-files-in-extends
    */
-  extends?: string
+  extends?: OneOrMany<string>
 
   /**
    * Files to include in the program.