feat(typescript): add types everywhere

The whole codebase has been rewritten to TypeScript.

.gitignore

@@ -1,5 +1,6 @@
 node_modules/
 lib/
+dist/
 !svgr.now.sh/lib/
 __fixtures_build__/
 src/__fixtures__/dist/

__fixtures__/custom-index.config.js

@@ -1,11 +1,10 @@
 const indexTemplate = require('./custom-index-template.js')
 
 function template(
-  { template },
-  opts,
   { imports, componentName, props, jsx, exports },
+  { tpl }
 ) {
-  return template.ast`${imports}
+  return tpl`${imports}
 export function ${componentName}(${props}) {
   return ${jsx};
 }

babel.config.js

@@ -1,6 +1,10 @@
-const path = require('path')
-const fs = require('fs')
+module.exports = (api) => {
+  api.cache(true)
 
-const config = fs.readFileSync(path.join(__dirname, '.babelrc'))
-
-module.exports = JSON.parse(config)
+  return {
+    presets: [
+      ['@babel/preset-env', { targets: { node: '12' }, loose: true }],
+      '@babel/preset-typescript',
+    ],
+  }
+}

build/rollup.config.js

@@ -0,0 +1,41 @@
+import path from 'path'
+import json from '@rollup/plugin-json'
+import dts from 'rollup-plugin-dts'
+import esbuild from 'rollup-plugin-esbuild'
+
+// eslint-disable-next-line import/no-dynamic-require
+const pkg = require(path.resolve(process.cwd(), './package.json'))
+
+// eslint-disable-next-line import/no-dynamic-require
+const name = pkg.main ? pkg.main.replace(/\.js$/, '') : './dist/index'
+
+const bundle = (config) => ({
+  ...config,
+  input: 'src/index.ts',
+  external: (id) => !/^[./]/.test(id),
+})
+
+export default [
+  bundle({
+    plugins: [json(), esbuild()],
+    output: [
+      {
+        file: `${name}.js`,
+        format: 'cjs',
+        sourcemap: Boolean(pkg.main),
+        exports: 'auto',
+      },
+    ],
+  }),
+  ...(pkg.main
+    ? [
+        bundle({
+          plugins: [dts()],
+          output: {
+            file: `${name}.d.ts`,
+            format: 'es',
+          },
+        }),
+      ]
+    : []),
+]

jest.config.js

@@ -1,4 +1,7 @@
 module.exports = {
   watchPathIgnorePatterns: ['__fixtures__', '__fixtures__build__'],
   rootDir: 'packages',
+  transform: {
+    '^.+\\.(j|t)sx?$': 'babel-jest',
+  },
 }