From 7a1fa6ce07eabf8e207ae35c42ee34ae772403f6 Mon Sep 17 00:00:00 2001
From: mwcz <mwc@clayto.com>
Date: Wed, 29 Sep 2021 12:57:40 -0400
Subject: [PATCH] add support for esbuild's 'define' option

---
 README.md                        |  1 +
 examples/esbuild-define/index.ts |  1 +
 src/index.ts                     |  3 ++-
 src/options.ts                   |  3 ++-
 tests/index.spec.ts              | 13 ++++++++++++-
 5 files changed, 18 insertions(+), 3 deletions(-)
 create mode 100644 examples/esbuild-define/index.ts

diff --git a/README.md b/README.md
index 924278e..aca3552 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@ export interface Options {
   },
   target?: string
   format?: string
+  define?: { [key: string]: string }
 }
 ```
 
diff --git a/examples/esbuild-define/index.ts b/examples/esbuild-define/index.ts
new file mode 100644
index 0000000..41b8682
--- /dev/null
+++ b/examples/esbuild-define/index.ts
@@ -0,0 +1 @@
+export default EXAMPLE_VAR;
diff --git a/src/index.ts b/src/index.ts
index e2bca0f..dd9d37b 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -46,6 +46,7 @@ const createTransformer = (options?: Options) => ({
       target: options?.target || 'es2018',
       ...(options?.jsxFactory ? { jsxFactory: options.jsxFactory }: {}),
       ...(options?.jsxFragment ? { jsxFragment: options.jsxFragment }: {}),
+      ...(options?.define ? { define: options.define }: {}),
       ...sourcemaps
     })
   
@@ -74,4 +75,4 @@ const transformer: Pick<Transformer, 'canInstrument' | 'createTransformer'> = {
 
 export * from './options'
 
-export default transformer
\ No newline at end of file
+export default transformer
diff --git a/src/options.ts b/src/options.ts
index 992e457..4d5e659 100644
--- a/src/options.ts
+++ b/src/options.ts
@@ -9,4 +9,5 @@ export interface Options {
   },
   target?: string
   format?: string
-}
\ No newline at end of file
+  define?: { [key: string]: string }
+}
diff --git a/tests/index.spec.ts b/tests/index.spec.ts
index a3a7726..bbbe2f6 100644
--- a/tests/index.spec.ts
+++ b/tests/index.spec.ts
@@ -25,6 +25,17 @@ const process = (sourcePath: string, options?: Options) => {
   return { ...output }
 }
 
+test('esbuild transform option', () => {
+    const output = process('./examples/esbuild-define/index.ts', {
+        define: {
+            "EXAMPLE_VAR": "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+        }
+    })
+
+    expect(output.code).toEqual(expect.stringContaining("ABCDEFGHIJKLMNOPQRSTUVWXYZ"));
+})
+
+
 test('ts file', () => {
   const names = display()
   expect(names.includes('Jane')).toBeTruthy()
@@ -94,4 +105,4 @@ test('should have sourcemap without [jest.mock]', () => {
 test('should not have sourcemap [default]', () => {
   const output = process('./examples/names-ts/index.ts', { sourcemap: false })
   expect(output.map).toBeNull()
-})
\ No newline at end of file
+})