feat: Create a package for backporting SWC minifier of next.js (#47)

packages/next-swc-minifier-backport/README.md

@@ -0,0 +1,12 @@
+# @swc/next-minifier-backport
+
+You can install `@swc/next-minifier-backport`, and set the environment variable `NEXT_SWC_MINIFY_BACKPORT` while running `next build`.
+
+```bash
+npm install @swc/next-minifier-backport
+```
+
+```bash
+
+NEXT_SWC_MINIFY_BACKPORT=true next build
+```

packages/next-swc-minifier-backport/index.js

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+const swc = require("@swc/core");
+
+function patchOptions(options) {
+    return {
+        ...options,
+        compress: {
+            ...(options?.compress ?? {}),
+            inline: 2,
+        },
+    };
+}
+
+exports.minify = (src, options) => {
+    return swc.minify(src, patchOptions(options));
+};
+
+exports.minifySync = (src, options) => {
+    return swc.minifySync(src, patchOptions(options));
+};

packages/next-swc-minifier-backport/package.json

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+{
+    "name": "@swc/next-minifier-backport",
+    "version": "0.1.0",
+    "description": "Backport SWC Minifier without the need to upgrade Next.js",
+    "main": "index.js",
+    "scripts": {},
+    "keywords": [
+        "next.js",
+        "swc",
+        "minifier"
+    ],
+    "author": "강동윤 <[email protected]>",
+    "bugs": {
+        "url": "https://github.com/swc-project/pkgs/issues"
+    },
+    "homepage": "https://swc.rs",
+    "license": "Apache-2.0",
+    "dependencies": {},
+    "devDependencies": {
+        "@swc/core": "^1.6.4"
+    },
+    "peerDependencies": {
+        "@swc/core": "^1.6.4"
+    }
+}