Method runAsync

packages/external-editor/src/index.ts:107–143

(callback?: StringCallback)

  }

  public runAsync(callback?: StringCallback): Promise<string> {
    this.createTempFile();
    const promise = new Promise<void>((resolve, reject) => {
      try {
        const editorProcess = spawn(this.editor.bin, this.editorArgs(), {
          shell: false,
          stdio: 'inherit',
        });
        editorProcess.once('error', (launchError) => {
          reject(new LaunchEditorError(launchError));
        });
        editorProcess.once('exit', (code: number | null) => {
          this.lastExitStatus = code ?? 0;
          resolve();
        });
      } catch (launchError) {
        reject(new LaunchEditorError(launchError));
      }
    })
      .then(() => {
        this.readTemporaryFile();
        return this.text;
      })
      .finally(() => {
        this.cleanup();
      });

    if (callback) {
      promise.then(
        (text) => callback(undefined, text),
        (err: unknown) =>
          callback(err instanceof Error ? err : new Error(String(err)), undefined),
      );
    }

    return promise;
  }

  private cleanup(): void {
    if (!this.tempDir) return;