타입스크립트의 project reference 맛보기

$ git clone git@github.com:zxzl/tasting-typescript-project-reference.git && cd tasting-typescript-project-reference
$ yarn
$ yarn workspace @shik/a tsc -b -v
[10:50:45 PM] Projects in this build:
    * ../b/tsconfig.json
    * ../c/tsconfig.json
    * tsconfig.json

[10:50:45 PM] Project '../b/tsconfig.json' is out of date because output file '../b/dist/src/index.js' does not exist

[10:50:45 PM] Building project 'somedirectory/packages/b/tsconfig.json'...

[10:50:46 PM] Project '../c/tsconfig.json' is out of date because output file '../c/dist/src/index.js' does not exist

[10:50:46 PM] Building project 'somedirectory/packages/c/tsconfig.json'...

[10:50:46 PM] Project 'tsconfig.json' is out of date because output file 'dist/src/index.js' does not exist

[10:50:46 PM] Building project 'somedirectory/packages/a/tsconfig.json'...

// packages/b/src/index.ts
export const add = (a: number, b: number) => a + b; // old

export const add = (a: number, b: number, c?: number) => a + b; //new

$ yarn workspace @shik/a tsc -b -v
[10:52:31 PM] Projects in this build:
    * ../b/tsconfig.json
    * ../c/tsconfig.json
    * tsconfig.json

[10:52:31 PM] Project '../b/tsconfig.json' is out of date because oldest output '../b/dist/src/index.js' is older than newest input '../b/src/index.ts'

[10:52:31 PM] Building project 'somedirectory/packages/b/tsconfig.json'...

[10:52:31 PM] Project '../c/tsconfig.json' is up to date because newest input '../c/src/index.ts' is older than oldest output '../c/dist/src/index.js'

[10:52:31 PM] Project 'tsconfig.json' is out of date because oldest output 'dist/src/index.js' is older than newest input '../b'

[10:52:31 PM] Building project 'somedirectory/packages/a/tsconfig.json'...