feat(antigravity): integrate Antigravity tool with MITM support and update CLI tools

src/mitm/dns/dnsConfig.js

@@ -0,0 +1,111 @@
+const { exec } = require("child_process");
+const fs = require("fs");
+const path = require("path");
+
+const TARGET_HOST = "daily-cloudcode-pa.googleapis.com";
+const IS_WIN = process.platform === "win32";
+const HOSTS_FILE = IS_WIN
+  ? path.join(process.env.SystemRoot || "C:\\Windows", "System32", "drivers", "etc", "hosts")
+  : "/etc/hosts";
+
+/**
+ * Execute command with sudo password via stdin (macOS/Linux only)
+ */
+function execWithPassword(command, password) {
+  return new Promise((resolve, reject) => {
+    const child = exec(command, (error, stdout, stderr) => {
+      if (error) {
+        reject(new Error(`Command failed: ${error.message}\n${stderr}`));
+      } else {
+        resolve(stdout);
+      }
+    });
+    child.stdin.write(`${password}\n`);
+    child.stdin.end();
+  });
+}
+
+/**
+ * Execute elevated command on Windows via PowerShell RunAs
+ */
+function execElevatedWindows(command) {
+  return new Promise((resolve, reject) => {
+    const psCommand = `Start-Process cmd -ArgumentList '/c','${command.replace(/'/g, "''")}' -Verb RunAs -Wait`;
+    exec(`powershell -Command "${psCommand}"`, (error, stdout, stderr) => {
+      if (error) {
+        reject(new Error(`Elevated command failed: ${error.message}\n${stderr}`));
+      } else {
+        resolve(stdout);
+      }
+    });
+  });
+}
+
+/**
+ * Check if DNS entry already exists
+ */
+function checkDNSEntry() {
+  try {
+    const hostsContent = fs.readFileSync(HOSTS_FILE, "utf8");
+    return hostsContent.includes(TARGET_HOST);
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Add DNS entry to hosts file
+ */
+async function addDNSEntry(sudoPassword) {
+  if (checkDNSEntry()) {
+    console.log(`DNS entry for ${TARGET_HOST} already exists`);
+    return;
+  }
+
+  const entry = `127.0.0.1 ${TARGET_HOST}`;
+
+  try {
+    if (IS_WIN) {
+      // Windows: use elevated echo >> hosts
+      await execElevatedWindows(`echo ${entry} >> "${HOSTS_FILE}"`);
+    } else {
+      const command = `echo "${entry}" | sudo -S tee -a ${HOSTS_FILE} > /dev/null`;
+      await execWithPassword(command, sudoPassword);
+    }
+    console.log(`✅ Added DNS entry: ${entry}`);
+  } catch (error) {
+    throw new Error(`Failed to add DNS entry: ${error.message}`);
+  }
+}
+
+/**
+ * Remove DNS entry from hosts file
+ */
+async function removeDNSEntry(sudoPassword) {
+  if (!checkDNSEntry()) {
+    console.log(`DNS entry for ${TARGET_HOST} does not exist`);
+    return;
+  }
+
+  try {
+    if (IS_WIN) {
+      // Windows: read, filter, write back via elevated PowerShell
+      const psScript = `(Get-Content '${HOSTS_FILE}') | Where-Object { $_ -notmatch '${TARGET_HOST}' } | Set-Content '${HOSTS_FILE}'`;
+      const psCommand = `Start-Process powershell -ArgumentList '-Command','${psScript.replace(/'/g, "''")}' -Verb RunAs -Wait`;
+      await new Promise((resolve, reject) => {
+        exec(`powershell -Command "${psCommand}"`, (error) => {
+          if (error) reject(new Error(`Failed to remove DNS entry: ${error.message}`));
+          else resolve();
+        });
+      });
+    } else {
+      const command = `sudo -S sed -i '' '/${TARGET_HOST}/d' ${HOSTS_FILE}`;
+      await execWithPassword(command, sudoPassword);
+    }
+    console.log(`✅ Removed DNS entry for ${TARGET_HOST}`);
+  } catch (error) {
+    throw new Error(`Failed to remove DNS entry: ${error.message}`);
+  }
+}
+
+module.exports = { addDNSEntry, removeDNSEntry, execWithPassword, checkDNSEntry };