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load tsconfig compilerOptions, respects "extends" field
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const ts = require('typescript'); | |
const { existsSync, readFileSync } = require('fs'); | |
const { resolve, dirname } = require('path'); | |
const readFile = (fname) => readFileSync(fname, 'utf8'); | |
const normalizeSlashes = (value) => value.replace(/\\/g, '/'); | |
module.exports = ({ | |
cwd = process.cwd(), | |
project, | |
} = {}) => { | |
let config = { compilerOptions: {} }; | |
let basePath = cwd; | |
const configFileName = project | |
? resolve(cwd, project) | |
: ts.findConfigFile(cwd, existsSync); | |
if (configFileName) { | |
const result = ts.readConfigFile(configFileName, readFile); | |
if (result.error) { | |
console.error('ERROR IN TYPESCRIPT while reading tsconfig'); | |
throw new Error(result.error) | |
} | |
config = result.config; | |
basePath = normalizeSlashes(dirname(configFileName)); | |
} | |
const result = ts.parseJsonConfigFileContent( | |
config, | |
ts.sys, | |
basePath, | |
undefined, | |
configFileName | |
); | |
if (result.errors.length) { | |
console.error('ERROR IN TYPESCRIPT while parsing tsconfig'); | |
throw new Error(result.errors[0]); | |
} | |
return result.options; | |
}; |
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