tambahan

.gitignore

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+# dependencies (bun install)
+node_modules
+
+# output
+out
+dist
+*.tgz
+
+# code coverage
+coverage
+*.lcov
+
+# logs
+logs
+_.log
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# caches
+.eslintcache
+.cache
+*.tsbuildinfo
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store

.npmignore

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+# Node/Bun modules
+node_modules
+bun.lockb
+
+# Git & metadata
+.git
+.gitignore
+.npmignore
+
+# Config & tools
+tsconfig.json
+bunfig.toml
+.eslintrc*
+.prettierrc*
+.vscode
+.idea
+
+# Tests & examples
+test
+tests
+__tests__
+coverage
+examples
+demo
+
+# Cache / temp
+*.log
+*.DS_Store
+
+# Local env
+.env
+.env.*.local

README.md

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+# g3n
+
+To install dependencies:
+
+```bash
+bun install
+```
+
+To run:
+
+```bash
+bun run index.ts
+```
+
+This project was created using `bun init` in bun v1.2.18. [Bun](https://bun.sh) is a fast all-in-one JavaScript runtime.

bin/g3n.ts

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+#!/usr/bin/env bun
+import minimist from "minimist";
+import path from "path";
+import { generateEnvTypes } from "../generate/env.generate.js";
+
+const args = minimist(process.argv.slice(2));
+
+const help = `
+g3n [command] [options]
+
+Commands:
+  env   Generate env.d.ts from .env file
+
+Options:
+  --env    Path ke file .env (default: .env)
+  --out    Path file output (default: types/env.d.ts)
+
+Examples:
+  g3n env --env .env.local --out src/types/env.d.ts
+`;
+
+(async () => {
+  const cmd = args._[0];
+
+  if (cmd === "env") {
+    generateEnvTypes({
+      envFilePath: args.env,
+      outputDir: args.out ? path.dirname(args.out) : undefined,
+      outputFileName: args.out ? path.basename(args.out) : undefined,
+    });
+    return;
+  }
+
+  console.error(help);
+})();

bun.lock

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+{
+  "lockfileVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "g3n",
+      "dependencies": {
+        "@types/minimist": "^1.2.5",
+        "dotenv": "^17.2.1",
+        "minimist": "^1.2.8",
+      },
+      "devDependencies": {
+        "@types/bun": "latest",
+      },
+      "peerDependencies": {
+        "typescript": "^5",
+      },
+    },
+  },
+  "packages": {
+    "@types/bun": ["@types/bun@1.2.20", "", { "dependencies": { "bun-types": "1.2.20" } }, "sha512-dX3RGzQ8+KgmMw7CsW4xT5ITBSCrSbfHc36SNT31EOUg/LA9JWq0VDdEXDRSe1InVWpd2yLUM1FUF/kEOyTzYA=="],
+
+    "@types/minimist": ["@types/minimist@1.2.5", "", {}, "sha512-hov8bUuiLiyFPGyFPE1lwWhmzYbirOXQNNo40+y3zow8aFVTeyn3VWL0VFFfdNddA8S4Vf0Tc062rzyNr7Paag=="],
+
+    "@types/node": ["@types/node@24.3.0", "", { "dependencies": { "undici-types": "~7.10.0" } }, "sha512-aPTXCrfwnDLj4VvXrm+UUCQjNEvJgNA8s5F1cvwQU+3KNltTOkBm1j30uNLyqqPNe7gE3KFzImYoZEfLhp4Yow=="],
+
+    "@types/react": ["@types/react@19.1.10", "", { "dependencies": { "csstype": "^3.0.2" } }, "sha512-EhBeSYX0Y6ye8pNebpKrwFJq7BoQ8J5SO6NlvNwwHjSj6adXJViPQrKlsyPw7hLBLvckEMO1yxeGdR82YBBlDg=="],
+
+    "bun-types": ["bun-types@1.2.20", "", { "dependencies": { "@types/node": "*" }, "peerDependencies": { "@types/react": "^19" } }, "sha512-pxTnQYOrKvdOwyiyd/7sMt9yFOenN004Y6O4lCcCUoKVej48FS5cvTw9geRaEcB9TsDZaJKAxPTVvi8tFsVuXA=="],
+
+    "csstype": ["csstype@3.1.3", "", {}, "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="],
+
+    "dotenv": ["dotenv@17.2.1", "", {}, "sha512-kQhDYKZecqnM0fCnzI5eIv5L4cAe/iRI+HqMbO/hbRdTAeXDG+M9FjipUxNfbARuEg4iHIbhnhs78BCHNbSxEQ=="],
+
+    "minimist": ["minimist@1.2.8", "", {}, "sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA=="],
+
+    "typescript": ["typescript@5.9.2", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A=="],
+
+    "undici-types": ["undici-types@7.10.0", "", {}, "sha512-t5Fy/nfn+14LuOc2KNYg75vZqClpAiqscVvMygNnlsHBFpSXdJaYtXMcdNLpl/Qvc3P2cB3s6lOV51nqsFq4ag=="],
+  }
+}

generate/env.generate.ts

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+import * as fs from "fs";
+import * as path from "path";
+import * as dotenv from "dotenv";
+
+interface GenerateEnvTypesOptions {
+  envFilePath?: string;
+  outputDir?: string;
+  outputFileName?: string;
+}
+
+export function generateEnvTypes(options: GenerateEnvTypesOptions = {}) {
+  const {
+    envFilePath = path.resolve(process.cwd(), ".env"),
+    outputDir = path.resolve(process.cwd(), "types"),
+    outputFileName = "env.d.ts",
+  } = options;
+
+  const outputFile = path.join(outputDir, outputFileName);
+
+  // 1. Baca .env
+  if (!fs.existsSync(envFilePath)) {
+    console.warn(`⚠️ .env file not found at: ${envFilePath}`);
+    return;
+  }
+
+  const envContent = fs.readFileSync(envFilePath, "utf-8");
+  const parsed = dotenv.parse(envContent);
+
+  // 2. Generate TypeScript declare
+  const lines = Object.keys(parsed).map((key) => `    ${key}?: string;`);
+
+  const fileContent = `declare namespace NodeJS {
+  interface ProcessEnv {
+${lines.join("\n")}
+  }
+}
+`;
+
+  // 3. Buat folder kalau belum ada
+  if (!fs.existsSync(outputDir)) {
+    fs.mkdirSync(outputDir, { recursive: true });
+  }
+
+  // 4. Tulis file
+  fs.writeFileSync(outputFile, fileContent, "utf-8");
+
+  console.log(`✅ Env types generated at: ${outputFile}`);
+}

index.ts

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+#!/usr/bin/env bun
+import minimist from "minimist";
+import { generateEnvTypes } from "./generate/env.generate.js";
+import path from "path";
+
+const args = minimist(process.argv.slice(2));
+
+const help = `
+g3n [command] [options]
+
+Commands:
+  env   Generate env.d.ts from .env file
+
+Options:
+  --env    Path ke file .env (default: .env)
+  --out    Path file output (default: types/env.d.ts)
+
+Examples:
+  g3n env --env .env.local --out src/types/env.d.ts
+`;
+
+(async () => {
+  const cmd = args._[0];
+
+  if (cmd === "env") {
+    generateEnvTypes({
+      envFilePath: args.env,
+      outputDir: args.out ? path.dirname(args.out) : undefined,
+      outputFileName: args.out ? path.basename(args.out) : undefined,
+    });
+    return;
+  }
+
+  console.error(help);
+})();

package.json

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+{
+  "name": "g3n",
+  "version": "1.0.0",
+  "type": "module",
+  "bin": {
+    "g3n": "./bin/g3n.ts"
+  },
+  "peerDependencies": {
+    "typescript": "^5"
+  },
+  "dependencies": {
+    "@types/minimist": "^1.2.5",
+    "dotenv": "^17.2.1",
+    "minimist": "^1.2.8"
+  }
+}

tsconfig.json

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+{
+  "compilerOptions": {
+    // Environment setup & latest features
+    "lib": ["ESNext"],
+    "target": "ESNext",
+    "module": "Preserve",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  }
+}