types: (wip) improve dts output

scripts/build.js

@@ -27,6 +27,7 @@ const targets = args._
 const formats = args.formats || args.f
 const devOnly = args.devOnly || args.d
 const prodOnly = !devOnly && (args.prodOnly || args.p)
+const buildTypes = args.t || args.types
 const buildAllMatching = args.all || args.a
 const lean = args.lean || args.l
 const commit = execa.sync('git', ['rev-parse', 'HEAD']).stdout.slice(0, 7)
@@ -68,7 +69,7 @@ async function build(target) {
         `NODE_ENV:${env}`,
         `TARGET:${target}`,
         formats ? `FORMATS:${formats}` : ``,
-        args.types ? `TYPES:true` : ``,
+        buildTypes ? `TYPES:true` : ``,
         prodOnly ? `PROD_ONLY:true` : ``,
         lean ? `LEAN:true` : ``
       ]
@@ -78,7 +79,7 @@ async function build(target) {
     { stdio: 'inherit' }
   )
 
-  if (args.types && pkg.types) {
+  if (buildTypes && pkg.types) {
     console.log()
     console.log(
       chalk.bold(chalk.yellow(`Rolling up type definitions for ${target}...`))
@@ -97,6 +98,17 @@ async function build(target) {
     })
 
     if (result.succeeded) {
+      // concat additional d.ts to rolled-up dts (mostly for JSX)
+      if (pkg.buildOptions.dts) {
+        const dtsPath = path.resolve(pkgDir, pkg.types)
+        const existing = await fs.readFile(dtsPath, 'utf-8')
+        const toAdd = await Promise.all(
+          pkg.buildOptions.dts.map(file => {
+            return fs.readFile(path.resolve(pkgDir, file), 'utf-8')
+          })
+        )
+        await fs.writeFile(dtsPath, existing + '\n' + toAdd.join('\n'))
+      }
       console.log(
         chalk.bold(chalk.green(`API Extractor completed successfully.`))
       )