feat: hosts 파일을 수정할 수 있는 updateDevHost script 작성 (#511)

package.json

@@ -3,13 +3,14 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "next dev -H local.dev.dadok.site",
+    "dev": "next dev -H dadok.app.local",
     "build": "next build",
-    "start": "next start -H local.dev.dadok.site",
+    "start": "next start -H dadok.app.local",
     "lint": "next lint",
     "prepare": "husky install",
     "storybook": "storybook dev -p 6006",
-    "build-storybook": "storybook build"
+    "build-storybook": "storybook build",
+    "update-host": "node ./updateDevHost.js dadok.app.local"
   },
   "dependencies": {
     "@chakra-ui/icons": "^2.0.17",

updateDevHost.js

@@ -0,0 +1,86 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+const fs = require('fs');
+const { EOL } = require('os');
+
+const LOCALHOST = '127.0.0.1';
+const IS_WINDOWS = process.platform === 'win32';
+const HOSTS_PATH = IS_WINDOWS
+  ? 'C:/Windows/System32/drivers/etc/hosts'
+  : '/etc/hosts';
+
+/**
+ * @param {typeof HOSTS_PATH} filePath - hosts 파일의 path
+ * @param {string} host - 사용할 dev server host
+ * */
+const updateHostFile = (filePath, host) => {
+  /** @type {{origin: string, paresed: [ip: string, hostname: string]}[]} */
+  const lines = [];
+
+  fs.readFileSync(filePath, { encoding: 'utf8' })
+    .split(/\r?\n/)
+    .forEach(line => {
+      const comments = line.replace(/#.*/, '');
+      const matches = /^\s*?(.+?)\s+(.+?)\s*$/.exec(comments);
+
+      if (matches && matches.length === 3) {
+        /** line을 읽으면서 { parsed: [ip, hostname] } 추가 */
+        const [_, ip, hostname] = matches;
+        lines.push({ parsed: [ip, hostname], origin: line });
+      } else {
+        /** 주석인 경우, { origin } 에만 추가 */
+        lines.push({ origin: line });
+      }
+    });
+
+  /** 일치하는 hostname이 있으면 종료 */
+  for (let idx = 0; idx < lines.length; idx += 1) {
+    const { parsed } = lines[idx];
+
+    if (parsed) {
+      const [ip, hostname] = parsed;
+      if (hostname === host) {
+        console.log(
+          `🚀 entry [ ${ip} ${host} ] already exists in ${filePath}!`
+        );
+        return true;
+      }
+    }
+  }
+
+  const length = lines.length;
+  for (let idx = length - 1; idx >= 0; idx -= 1) {
+    const { parsed } = lines[idx];
+
+    if (!parsed) continue;
+
+    /** 마지막 entry 아래에 host 추가 */
+    const sliced = lines.slice(0, idx + 1);
+
+    sliced.push({ origin: '# Added by Dadok' });
+    sliced.push({ parsed: ['127.0.0.1', host], origin: `127.0.0.1 ${host}` });
+    sliced.push(...lines.slice(idx + 1));
+
+    const state = fs.statSync(filePath);
+    fs.writeFileSync(filePath, sliced.map(({ origin }) => origin).join(EOL), {
+      mode: state.mode,
+    });
+
+    console.log(`🚀 entry [ ${LOCALHOST} ${host} ] added in ${filePath}!`);
+    return true;
+  }
+
+  return false;
+};
+
+/** node command를 통해 updateHostFile 함수 실행 */
+try {
+  const host = process.argv[2];
+
+  if (!host) {
+    throw Error('Expected 1 argument.');
+  }
+
+  updateHostFile(HOSTS_PATH, host);
+} catch (err) {
+  console.error(err);
+}