parse-tsconfg-file.js

import typescript from 'typescript'


/**
 * let { tsconfig, projectReferences, compilerOptions } = parseTsconfigFile()
 *
 * console.debug(tsconfig, projectReferences, compilerOptions)
 */
const parseTsconfigFile = (tsconfigFile = './tsconfig.json') => {
  const { config: tsconfigRaw } = typescript.readConfigFile(tsconfigFile, typescript.sys.readFile)

  const parsed = typescript.parseJsonConfigFileContent(
    tsconfigRaw,
    typescript.sys,
    path.dirname(tsconfigFile),
    tsconfigRaw.compilerOptions,
    tsconfigFile,
  )
  const { options: compilerOptions } = typescript.convertCompilerOptionsFromJson(
    parsed.options,
    path.dirname(tsconfigFile),
    tsconfigFile,
  )

  return {
    tsconfig: parsed.options,
    projectReferences: parsed.projectReferences,
    compilerOptions,
  }
}