エンジンが使うポートが割り当てできなければ、他の空いているポートで起動してユーザーに通知する

src/background.ts

@@ -599,6 +599,10 @@ ipcMainHandle("GET_PRIVACY_POLICY_TEXT", () => {
   return privacyPolicyText;
 });
 
+ipcMainHandle("GET_ALT_PORT_INFO", () => {
+  return engineManager.altPortInfo;
+});
+
 ipcMainHandle("SHOW_AUDIO_SAVE_DIALOG", async (_, { title, defaultPath }) => {
   const result = await dialog.showSaveDialog(win, {
     title,

src/background/engineManager.ts

@@ -5,10 +5,11 @@ import treeKill from "tree-kill";
 import Store from "electron-store";
 import shlex from "shlex";
 
-import { BrowserWindow, dialog } from "electron";
+import { app, BrowserWindow, dialog } from "electron";
 
 import log from "electron-log";
 import { z } from "zod";
+import { PortManager } from "./portManager";
 import { ipcMainSend } from "@/electron/ipc";
 
 import {
@@ -20,6 +21,7 @@ import {
   engineIdSchema,
   minimumEngineManifestSchema,
 } from "@/type/preload";
+import { AltPortInfo } from "@/store/type";
 
 type EngineProcessContainer = {
   willQuitEngine: boolean;
@@ -66,6 +68,8 @@ export class EngineManager {
   defaultEngineInfos: EngineInfo[];
   engineProcessContainers: Record<EngineId, EngineProcessContainer>;
 
+  public altPortInfo: AltPortInfo = {};
+
   constructor({
     store,
     defaultEngineDir,
@@ -209,6 +213,7 @@ export class EngineManager {
     const engineInfo = engineInfos.find(
       (engineInfo) => engineInfo.uuid === engineId
     );
+
     if (!engineInfo)
       throw new Error(`No such engineInfo registered: engineId == ${engineId}`);
 
@@ -224,6 +229,54 @@ export class EngineManager {
       return;
     }
 
+    const engineInfoUrl = new URL(engineInfo.host);
+    const portManager = new PortManager(
+      engineInfoUrl.hostname,
+      parseInt(engineInfoUrl.port)
+    );
+
+    log.info(
+      `ENGINE ${engineId}: Checking whether port ${engineInfoUrl.port} is assignable...`
+    );
+
+    // ポートを既に割り当てられているプロセスidの取得: undefined → ポートが空いている
+    const processId = await portManager.getProcessIdFromPort();
+    if (processId !== undefined) {
+      const processName = await portManager.getProcessNameFromPid(processId);
+      log.warn(
+        `ENGINE ${engineId}: Port ${engineInfoUrl.port} has already been assigned by ${processName} (pid=${processId})`
+      );
+
+      // 代替ポート検索
+      const altPort = await portManager.findAltPort();
+
+      // 代替ポートが見つからないとき
+      if (!altPort) {
+        log.error(`ENGINE ${engineId}: No Alternative Port Found`);
+        dialog.showErrorBox(
+          `${engineInfo.name} の起動に失敗しました`,
+          `${engineInfoUrl.port}番ポートの代わりに利用可能なポートが見つかりませんでした。PCを再起動してください。`
+        );
+        app.exit(1);
+        throw new Error("No Alternative Port Found");
+      }
+
+      // 代替ポートの情報
+      this.altPortInfo[engineId] = {
+        from: parseInt(engineInfoUrl.port),
+        to: altPort,
+      };
+
+      // 代替ポートを設定
+      engineInfo.host = new PortManager(
+        engineInfoUrl.hostname,
+        altPort
+      ).getUrl();
+      log.warn(
+        `ENGINE ${engineId}: Applied Alternative Port: ${engineInfoUrl.port} -> ${altPort}`
+      );
+    }
+
     log.info(`ENGINE ${engineId}: Starting process`);
 
     if (!(engineId in this.engineProcessContainers)) {
@@ -244,7 +297,12 @@ export class EngineManager {
 
     // エンジンプロセスの起動
     const enginePath = engineInfo.executionFilePath;
-    const args = engineInfo.executionArgs.concat(useGpu ? ["--use_gpu"] : []);
+    const args = engineInfo.executionArgs.concat(useGpu ? ["--use_gpu"] : [], [
+      "--host",
+      new URL(engineInfo.host).hostname,
+      "--port",
+      new URL(engineInfo.host).port,
+    ]);
 
     log.info(`ENGINE ${engineId} path: ${enginePath}`);
     log.info(`ENGINE ${engineId} args: ${JSON.stringify(args)}`);

src/background/portManager.ts

@@ -0,0 +1,129 @@
+import { execFileSync } from "child_process";
+import log from "electron-log";
+
+const isWindows = process.platform === "win32";
+
+export class PortManager {
+  constructor(private hostname: string, private port: number) {}
+
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  portLog = (...message: any) => log.info(`PORT ${this.port}: ${message}`);
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  portWarn = (...message: any) => log.warn(`PORT ${this.port}: ${message}`);
+
+  public getUrl(isHttps = false): string {
+    return `${isHttps ? "https" : "http"}://${this.hostname}:${this.port}`;
+  }
+
+  /**
+   * "netstat -ano" の stdout から, 指定したポートを使用しているプロセスの process id を取得する
+   *
+   * ex) stdout:
+   * ``` cmd
+   * TCP  127.0.0.1:5173   127.0.0.1:50170  TIME_WAIT  0
+   * TCP  127.0.0.1:6463   0.0.0.0:0        LISTENING  18692
+   * TCP  127.0.0.1:50021  0.0.0.0:0        LISTENING  17320
+   * ```
+   * -> `17320`
+   *
+   * @param stdout netstat の stdout
+   * @returns `process id` or `undefined` (ポートが使用されていないとき)
+   */
+  private stdout2processId(stdout: string): number | undefined {
+    const lines = stdout.split("\n");
+    for (const line of lines) {
+      if (line.includes(`${this.hostname}:${this.port}`)) {
+        const parts = line.trim().split(/\s+/);
+        return parseInt(parts[parts.length - 1], 10);
+      }
+    }
+    return undefined;
+  }
+
+  async getProcessIdFromPort(): Promise<number | undefined> {
+    this.portLog("Getting process id...");
+    const exec = isWindows
+      ? {
+          cmd: "netstat",
+          args: ["-ano"],
+        }
+      : {
+          cmd: "lsof",
+          args: ["-i", `:${this.port}`, "-t", "-sTCP:LISTEN"],
+        };
+
+    this.portLog(`Running command: "${exec.cmd} ${exec.args.join(" ")}"`);
+
+    let stdout = execFileSync(exec.cmd, exec.args, {
+      shell: true,
+    }).toString();
+
+    if (isWindows) {
+      stdout = this.stdout2processId(stdout)?.toString() ?? "";
+    }
+
+    if (!stdout || !stdout.length) {
+      this.portLog("Assignable; Nobody uses this port!");
+      return undefined;
+    }
+
+    this.portWarn(`Nonassignable; pid=${stdout} uses this port!`);
+    return parseInt(stdout);
+  }
+
+  async getProcessNameFromPid(pid: number): Promise<string> {
+    this.portLog(`Getting process name from pid=${pid}...`);
+    const exec = isWindows
+      ? {
+          cmd: "wmic",
+          args: ["process", "where", `"ProcessID=${pid}"`, "get", "name"],
+        }
+      : {
+          cmd: "ps",
+          args: ["-p", pid.toString(), "-o", "comm="],
+        };
+
+    let stdout = execFileSync(exec.cmd, exec.args, { shell: true }).toString();
+
+    if (isWindows) {
+      /*
+       * ex) stdout:
+       * ```
+       * Name
+       * node.exe
+       * ```
+       * -> `node.exe`
+       */
+      stdout = stdout.split("\r\n")[1];
+    }
+
+    this.portLog(`Found process name: ${stdout}`);
+    return stdout.trim();
+  }
+
+  /**
+   * 割り当て可能な他のポートを探します
+   *
+   * @returns 割り当て可能なポート番号 or `undefined` (割り当て可能なポートが見つからなかったとき)
+   */
+  async findAltPort(): Promise<number | undefined> {
+    this.portLog(`Find another assignable port from ${this.port}...`);
+
+    // エンジン指定のポート + 100番までを探索  エフェメラルポートの範囲の最大は超えないようにする
+    const altPortMax = Math.min(this.port + 100, 65535);
+
+    for (let altPort = this.port + 1; altPort <= altPortMax; altPort++) {
+      this.portLog(`Trying whether port ${altPort} is assignable...`);
+      const altPid = await new PortManager(
+        this.hostname,
+        altPort
+      ).getProcessIdFromPort();
+
+      // ポートを既に割り当てられているプロセスidの取得: undefined → ポートが空いている
+      if (altPid === undefined) return altPort;
+    }
+
+    this.portWarn(`No alternative port found! ${this.port}...${altPortMax}`);
+    return undefined;
+  }
+}

src/components/MenuBar.vue

@@ -81,6 +81,13 @@ export type MenuItemType = MenuItemData["type"];
 const store = useStore();
 const $q = useQuasar();
 const currentVersion = ref("");
+const altPorts = ref<number[]>([]);
+
+store.dispatch("GET_ALT_PORT_INFO").then(
+  (altPortInfo) =>
+    // {[engineId]: {from: number, to: number}} -> to: number[]
+    (altPorts.value = Object.values(altPortInfo).map(({ to }) => to))
+);
 window.electron.getAppInfos().then((obj) => {
   currentVersion.value = obj.version;
 });
@@ -103,7 +110,9 @@ const titleText = computed(
     (projectName.value !== undefined ? projectName.value + " - " : "") +
     "VOICEVOX" +
     (currentVersion.value ? " - Ver. " + currentVersion.value : "") +
-    (isMultiEngineOffMode.value ? " - マルチエンジンオフ" : "")
+    (isMultiEngineOffMode.value ? " - マルチエンジンオフ" : "") +
+    // メインエンジン (0番目) の代替ポートの表示のみ
+    (altPorts.value.length ? " - Port: " + altPorts.value[0] : "")
 );
 
 // FIXME: App.vue内に移動する

src/electron/preload.ts

@@ -71,6 +71,10 @@ const api: Sandbox = {
     return await ipcRendererInvoke("GET_PRIVACY_POLICY_TEXT");
   },
 
+  getAltPortInfo: async () => {
+    return await ipcRendererInvoke("GET_ALT_PORT_INFO");
+  },
+
   saveTempAudioFile: async ({ relativePath, buffer }) => {
     if (!tempDir) {
       tempDir = await ipcRendererInvoke("GET_TEMP_DIR");

src/main.ts

@@ -1,6 +1,6 @@
 import { createApp } from "vue";
 import { createGtm } from "@gtm-support/vue-gtm";
-import { Quasar, Dialog, Loading } from "quasar";
+import { Quasar, Dialog, Loading, Notify } from "quasar";
 import iconSet from "quasar/icon-set/material-icons";
 import App from "./App.vue";
 import router from "./router";
@@ -39,6 +39,7 @@ createApp(App)
     plugins: {
       Dialog,
       Loading,
+      Notify,
     },
   })
   .use(ipcMessageReceiver, { store })

src/store/engine.ts

@@ -44,6 +44,13 @@ export const engineStore = createPartialStore<EngineStoreTypes>({
       });
     },
   },
+
+  GET_ALT_PORT_INFO: {
+    async action() {
+      return await window.electron.getAltPortInfo();
+    },
+  },
+
   SET_ENGINE_INFOS: {
     mutation(
       state,

src/store/setting.ts

@@ -57,6 +57,7 @@ export const settingStoreState: SettingStoreState = {
   },
   confirmedTips: {
     tweakableSliderByScroll: false,
+    noticeAltPortInfo: true,
   },
   engineSettings: {},
 };

src/store/type.ts

@@ -80,6 +80,8 @@ export type Command = {
 };
 
 export type EngineState = "STARTING" | "FAILED_STARTING" | "ERROR" | "READY";
+export type AltPortInfo = Record<EngineId, { from: number; to: number }>;
+
 export type SaveResult =
   | "SUCCESS"
   | "WRITE_ERROR"
@@ -737,6 +739,10 @@ export type EngineStoreTypes = {
     getter: EngineInfo[];
   };
 
+  GET_ALT_PORT_INFO: {
+    action(): Promise<AltPortInfo>;
+  };
+
   SET_ENGINE_MANIFESTS: {
     mutation: { engineManifests: Record<EngineId, EngineManifest> };
   };

src/styles/_index.scss

@@ -102,6 +102,11 @@ img {
   background: transparent; // デフォルトの設定だと全画面ダイアログが出る際に黒背景がちらつく
 }
 
+// トースト通知内にあるボタン
+.q-notification__actions .q-btn {
+  font-weight: bold;
+}
+
 // 設定とかのヘッダーの色
 .q-layout__section--marginal {
   background: colors.$toolbar !important;
@@ -232,3 +237,13 @@ img {
 .bg-toolbar-button-display {
   background: colors.$toolbar-button-display;
 }
+
+.bg-toast {
+  background: colors.$toast;
+}
+.text-toast-display {
+  color: colors.$toast-display;
+}
+.text-toast-button-display {
+  color: colors.$toast-button-display;
+}

src/styles/colors.scss

@@ -44,6 +44,10 @@ $active-point-hover-rgb: var(--color-active-point-hover-rgb);
 
   --color-splitter: var(--color-primary);
   --color-splitter-rgb: var(--color-primary-rgb);
+
+  --color-toast: rgba(var(--color-primary-light-rgb), 0.4);
+  --color-toast-display: var(--color-display);
+  --color-toast-button-display: rgba(var(--color-display-rgb), 0.6);
 }
 
 :root[is-dark-theme="true"] {
@@ -58,6 +62,10 @@ $active-point-hover-rgb: var(--color-active-point-hover-rgb);
 
   --color-splitter: var(--color-surface);
   --color-splitter-rgb: var(--color-surface-rgb);
+
+  --color-toast: rgba(var(--color-primary-light-rgb), 0.4);
+  --color-toast-display: var(--color-display);
+  --color-toast-button-display: var(--color-primary);
 }
 
 $toolbar: var(--color-toolbar);
@@ -74,3 +82,7 @@ $splitter-rgb: var(--color-splitter-rgb);
 
 $warning: var(--color-warning);
 $warning-rgb: var(--color-warning-rgb);
+
+$toast: var(--color-toast);
+$toast-display: var(--color-toast-display);
+$toast-button-display: var(--color-toast-button-display);