From 12f03b86c88f2ca7d0f80c322dd7daea67976223 Mon Sep 17 00:00:00 2001
From: Alfredo Salzillo <noctisbels@gmail.com>
Date: Sun, 3 Jan 2021 02:00:14 +0100
Subject: [PATCH 1/3] feat: add env plugin

---
 plugins/env | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 plugins/env

diff --git a/plugins/env b/plugins/env
new file mode 100644
index 000000000..584c54376
--- /dev/null
+++ b/plugins/env
@@ -0,0 +1,31 @@
+import { Plugin } from '../types.ts';
+
+export const defaultMatcher = /{{([^}]*)}}/ig;
+
+type Options = {
+  matcher?: string | RegExp,
+}
+const defaultOptions: Options = {
+  matcher: defaultMatcher,
+}
+const env = (options: Options = defaultOptions): Plugin => ({
+  name: 'env',
+  test: /\.[tj]s[x]?$/,
+  acceptHMR: true,
+  async transform(content: Uint8Array) {
+    const parameters = Deno.env.toObject();
+    const string = (new TextDecoder()).decode(content);
+    const code = string
+      .replaceAll(options.matcher!, (raw, match) => {
+        if (match in parameters) {
+          return String(parameters[match]);
+        }
+        return raw;
+      });
+    return {
+      code,
+    }
+  }
+})
+
+export default env;

From 0a79e272674d8611ebc69ed7ef5e1ef1e3b72673 Mon Sep 17 00:00:00 2001
From: Alfredo Salzillo <noctisbels@gmail.com>
Date: Sun, 3 Jan 2021 02:00:47 +0100
Subject: [PATCH 2/3] feat: add env plugin

---
 plugins/env_test.ts | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 plugins/env_test.ts

diff --git a/plugins/env_test.ts b/plugins/env_test.ts
new file mode 100644
index 000000000..29fb2e598
--- /dev/null
+++ b/plugins/env_test.ts
@@ -0,0 +1,38 @@
+import { assertEquals, assert } from 'https://deno.land/std/testing/asserts.ts';
+import env from './env.ts';
+
+Deno.env.set('TEST_ENV_VAR', '1')
+
+Deno.test('env loader should accept ts files', async () => {
+  const plugin = env();
+  assert(plugin.test.test('mod.ts'));
+})
+
+Deno.test('env loader should accept tsx files', async () => {
+  const plugin = env();
+  assert(plugin.test.test('mod.tsx'));
+})
+
+Deno.test('env loader should accept js files', async () => {
+  const plugin = env();
+  assert(plugin.test.test('mod.js'));
+})
+
+Deno.test('env loader should accept jsx files', async () => {
+  const plugin = env();
+  assert(plugin.test.test('mod.jsx'));
+})
+
+Deno.test('env loader should be accept HMR files', async () => {
+  const plugin = env();
+  assert(plugin.acceptHMR);
+})
+
+Deno.test('env loader should replace env variables', async () => {
+  const plugin = env();
+  const { code, loader } = await plugin.transform?.(
+    (new TextEncoder).encode('const start = {{TEST_ENV_VAR}};'),
+    'mod.ts'
+  )!
+  assertEquals(code, 'const start = 1;')
+})

From ba2d9ac462d0c332cab1685f9af0ab601408d3e6 Mon Sep 17 00:00:00 2001
From: Alfredo Salzillo <noctisbels@gmail.com>
Date: Sun, 3 Jan 2021 02:01:18 +0100
Subject: [PATCH 3/3] feat: add env plugin

---
 plugins/{env => env.ts} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename plugins/{env => env.ts} (100%)

diff --git a/plugins/env b/plugins/env.ts
similarity index 100%
rename from plugins/env
rename to plugins/env.ts