From 8de9cc4c68a11ac9a898300059f221bf98c4094a Mon Sep 17 00:00:00 2001
From: Leo Li <87396507+leoyli-headsup@users.noreply.github.com>
Date: Tue, 14 Sep 2021 17:52:39 -0400
Subject: [PATCH] Add SWC support (#191)

---
 .swcrc                         |  8 ++++++++
 index.js                       |  6 ++++--
 package.json                   |  5 ++++-
 scripts/unit-typescript-swc.js | 21 +++++++++++++++++++++
 4 files changed, 37 insertions(+), 3 deletions(-)
 create mode 100644 .swcrc
 create mode 100644 scripts/unit-typescript-swc.js

diff --git a/.swcrc b/.swcrc
new file mode 100644
index 00000000..a2d5b04f
--- /dev/null
+++ b/.swcrc
@@ -0,0 +1,8 @@
+{
+  "jsc": {
+    "parser": {
+      "syntax": "typescript"
+    },
+    "target": "es2016"
+  }
+}
diff --git a/index.js b/index.js
index 803474a9..2db02aa6 100644
--- a/index.js
+++ b/index.js
@@ -7,8 +7,10 @@ const pkgUp = require('pkg-up')
 const semver = require('semver')
 
 const isTsNode = (Symbol.for('ts-node.register.instance') in process) || !!process.env.TS_NODE_DEV
-const isJestEnviroment = process.env.JEST_WORKER_ID !== undefined
-const typescriptSupport = isTsNode || isJestEnviroment
+const isJestEnvironment = process.env.JEST_WORKER_ID !== undefined
+const isSWCRegister = process._preload_modules && process._preload_modules.includes('@swc/register')
+const isSWCNode = typeof process.env._ === 'string' && process.env._.includes('.bin/swc-node')
+const typescriptSupport = isTsNode || isJestEnvironment || isSWCRegister || isSWCNode
 
 const moduleSupport = semver.satisfies(process.version, '>= 14 || >= 12.17.0 < 13.0.0')
 const routeParamPattern = /\/_/ig
diff --git a/package.json b/package.json
index e26d9713..cb591c73 100644
--- a/package.json
+++ b/package.json
@@ -6,10 +6,11 @@
   "types": "fastify-autoload.d.ts",
   "scripts": {
     "lint": "standard | snazzy",
-    "test": "npm run lint && npm run unit && npm run typescript && npm run typescript:jest && npm run typescript:esm",
+    "test": "npm run lint && npm run unit && npm run typescript && npm run typescript:jest && npm run typescript:esm && npm run typescript:swc",
     "typescript": "tsd",
     "typescript:jest": "jest",
     "typescript:esm": "node scripts/unit-typescript-esm.js",
+    "typescript:swc": "node scripts/unit-typescript-swc.js",
     "unit": "node scripts/unit.js",
     "unit:with-modules": "tap test/commonjs/*.js test/module/*.js test/typescript/*.ts",
     "unit:without-modules": "tap test/commonjs/*.js test/typescript/*.ts"
@@ -36,6 +37,8 @@
   },
   "homepage": "https://github.com/fastify/fastify-autoload#readme",
   "devDependencies": {
+    "@swc/core": "^1.2.85",
+    "@swc/register": "^0.1.7",
     "@types/jest": "^27.0.1",
     "@types/node": "^16.0.0",
     "@types/tap": "^15.0.5",
diff --git a/scripts/unit-typescript-swc.js b/scripts/unit-typescript-swc.js
new file mode 100644
index 00000000..08d5e691
--- /dev/null
+++ b/scripts/unit-typescript-swc.js
@@ -0,0 +1,21 @@
+'use strict'
+
+const { exec } = require('child_process')
+const semver = require('semver')
+
+if (semver.satisfies(process.version, '>= 14')) {
+  const args = [
+    'tap',
+    '--node-arg=--require=@swc/register',
+    '--no-coverage',
+    'test/typescript/*.ts'
+  ]
+
+  const child = exec(args.join(' '), {
+    shell: true
+  })
+
+  child.stdout.pipe(process.stdout)
+  child.stderr.pipe(process.stderr)
+  child.once('close', process.exit)
+}