zenn.devに自動publishできたら便利そう

---
title: "" # 記事のタイトル
emoji: "🐥" # アイキャッチとして使われる絵文字（1文字だけ）
type: "tech" # tech: 技術記事 / idea: アイデア記事
topics: [] # タグ。["markdown", "rust", "aws"]のように指定する
publish-on: 2020-12-01
published: false # 公開設定（falseにすると下書き）
---

npx zenn publish

npm start publish

on:
  schedule:
    - cron:  '1 0 * * *'

const path = require('path'),
      fs = require('fs').promises,
      frontmatter = require('@github-docs/frontmatter');

const schema = {
  properties: {
    title:     { type: 'string',  required: true },
    emoji:     { type: 'string',  required: true },
    type:      { type: 'string',  required: true, enum: ['tech', 'idea'] },
    topics:    { type: 'array',   required: true },
    published: { type: 'boolean', required: true },
    publishAt: { type: 'any' }
  }
};

async function publish_dir(dirpath) {
  const dir = await fs.opendir(dirpath);
  const now = new Date();
  for await (const dirent of dir) {
    const filepath = path.join(dirpath, dirent.name);
    if (!filepath.endsWith('.md')) {
      continue
    }

    const file = await fs.readFile(filepath, {'encoding': 'utf8'})
    const {data, content, errors} = frontmatter(file, {schema, filepath})
    if (errors.length > 0) {
      console.error(errors)
      continue
    }
    if (data.published) {
      console.debug('found published article: ' + dirent.name);
      continue
    }
    if (!('publishAt' in data)) {
      console.debug('found unreserved article: ' + dirent.name);
      continue
    }
    if (now.valueOf() <= new Date(data.publishAt).valueOf()) {
      console.debug('found unpublished article: ' + dirent.name);
    }
    console.info('publish ' + dirent.name);
    data.published = true;

    await fs.writeFile(filepath, frontmatter.stringify(content, data), 'utf8')
  }
}

const { program } = require('commander');

program
  .command('publish')
  .description('Make a "published" property in the articles which the "publishAt" is past')
  .action(async () => {
    await publish_dir('./articles');
  });

program.parseAsync(process.argv)

 ---
-title: "Go製ツールをGitHub Container Registryに載せてGitHub Actionとして公開する" # 記事のタイトル
-emoji: "🐳" # アイキャッチとして使われる絵文字（1文字だけ）
-type: "tech" # tech: 技術記事 / idea: アイデア記事
-topics: ["docker", "github", "go", "githubactions"] # タグ。["markdown", "rust", "aws"]のように指定する
-publishAt: "2020-11-30"
-published: false # 公開設定（falseにすると下書き）
+title: Go製ツールをGitHub Container Registryに載せてGitHub Actionとして公開する
+emoji: "\U0001F433"
+type: tech
+topics:
+  - docker
+  - github
+  - go
+  - githubactions
+publishAt: '2020-11-30'
+published: true
 ---

     }
     console.info('publish ' + dirent.name);
     data.published = true;
+    delete data.publishAt;
 
     await fs.writeFile(filepath, frontmatter.stringify(content, data), 'utf8')
   }