yaak/plugins/template-function-fs/src/index.ts

import type { CallTemplateFunctionArgs, Context, PluginDefinition } from '@yaakapp/api';
import fs from 'node:fs';

export const plugin: PluginDefinition = {
  templateFunctions: [
    {
      name: 'fs.readFile',
      description: 'Read the contents of a file as utf-8',
      args: [{ title: 'Select File', type: 'file', name: 'path', label: 'File' }],
      async onRender(_ctx: Context, args: CallTemplateFunctionArgs): Promise<string | null> {
        if (!args.values.path) return null;

        try {
          return fs.promises.readFile(String(args.values.path ?? ''), 'utf-8');
        } catch {
          return null;
        }
      },
    },
  ],
};