feat(docz-core): detect typescript without config

Checks for a tsconfig.json file to initialize config.typescript

Can be overridden by user

core/docz-core/src/config/argv.ts

@@ -7,6 +7,7 @@ import { get } from 'lodash/fp'
 
 import { Plugin } from '../lib/Plugin'
 import * as paths from '../config/paths'
+import { doczRcBaseConfig } from './docz'
 
 const getEnv = (val: string | string[], defaultValue: any = null): any =>
   envDotProp.get(val, defaultValue, { parse: true })
@@ -131,7 +132,7 @@ export const setArgs = (yargs: Yargs) => {
     .option('typescript', {
       alias: 'ts',
       type: 'boolean',
-      default: getEnv('docz.typescript', false),
+      default: getEnv('docz.typescript', doczRcBaseConfig.typescript),
     })
     .option('propsParser', {
       type: 'boolean',

core/docz-core/src/config/docz.ts

@@ -1,16 +1,17 @@
 import * as path from 'path'
 import { Arguments } from 'yargs'
-import { omit } from 'lodash/fp'
+import { omit, merge } from 'lodash/fp'
 import { load, loadFrom } from 'load-cfg'
-import { merge } from 'lodash/fp'
 import detectPort from 'detect-port'
+import fs from 'fs-extra'
 
 import * as paths from '../config/paths'
 import { Config, Argv } from '../config/argv'
 import { Plugin } from '../lib/Plugin'
 
 const toOmit = ['_', '$0', 'version', 'help']
 export const doczRcBaseConfig = {
+  typescript: fs.existsSync(paths.appTsConfig),
   themeConfig: {},
   themesDir: 'src',
   mdxExtensions: ['.md', '.mdx'],

core/docz-core/src/config/paths.ts

@@ -71,6 +71,7 @@ export const docz = resolveApp('.docz')
 export const cache = path.resolve(docz, '.cache/')
 export const app = path.resolve(docz, 'app/')
 export const appPackageJson = resolveApp('package.json')
+export const appTsConfig = resolveApp('tsconfig.json')
 export const gatsbyConfig = resolveApp('gatsby-config.js')
 export const gatsbyBrowser = resolveApp('gatsby-browser.js')
 export const gatsbyNode = resolveApp('gatsby-node.js')