使用 Google Apps Script 三步骤免费建立 Github Repo Star Notifier
撰写 GAS 串接 Github Webhook 转发按星星 Like 通知到 Line
前言
身为开源专案的维护者,不为钱不为名,只为一个 虚荣心 ;每当看到有新的 ⭐️ 星星时,心中都窃喜不已;花时间花精力做的专案真的有人在用、真的有帮助的有同样问题的朋友。

因此对 ⭐️ 星星的观测多少有点强迫症,时不时就刷一下 Github 查看 ⭐️星星 数有没有增加;我就在想有没有更主动一点的方式,当有人 按 ⭐️星星 时主动跳通知提示,不需要手动追踪查询。
现有工具
首先考虑寻找现有工具达成,到 Github Marketplace 搜寻了一下,有几个大神做好的工具可以使用。

试了其中几个效果不如预期,有的已不在运作、有的只能在每 5/10/20 个 ⭐️星星 时发送通知(我只是小小,有 1 个新的 ⭐️ 就很开心了😝)、通知只能发信件但我想要用 SNS 通知。
再加上只是为了「虚荣心」装一个 App,心里不太踏实,怕有资安风险问题。
iOS 上的 Github App 或 GitTrends …等等第三方 App 也都不支援此功能。
自己打造 Github Repo Star Notifier
基于以上,其实我们可以直接用 Google Apps Script 免费、快速打造自己的 Github Repo Star Notifier。
2024/10/12 Update
⚠️⚠️⚠️
因 Line Notify 将于 2025/04/01 关闭 ,请参考 我的最新文章「 10 分钟快速移转 Line Notify 到 Telegram Bot 通知 」 改使用 Telegram 串接通知功能。
准备工作
本文以 Line 做为通知媒介,如果你想使用其他通讯软体通知可以询问 ChatGPT 如何实现。

询问 ChatGPT 如何实现 Line Notify
lineToken :
-
前往 Line Notify
-
登入你的 Line 帐号之后拉到底找到「Generate access token (For developers)」区

- 点击「Generate token」

-
Token Name:输入你想要的机器人头衔名称,会显示在讯息之前 (e.g.
Github Repo Notifer: XXXX) -
选择讯息要传送到的地方:我选择
1-on-1 chat with LINE Notify透过 LINE Notify 官方机器人发送讯息给自己。 -
点击「Generate token」

-
选择「Copy」
-
并记下 Token,如果日后遗忘需要重新产生,无法再次查看 。
githubWebhookSecret :
- 前往 Random.org 产生一组随机字串

- Copy & 记下此随机字串
我们会用这组字串做为 Github Webhook 与 Goolge Apps Script 之间的请求验证媒介。
因 GAS 限制 ,无法在
doPost(e)中取得Headers内容,因此不能使用 Github Webhook 标准的验证方式 ,只能手动用?secret=Query 做字串匹配验证。
建立 Google Apps Script
前往 Google Apps Script ,点击左上角「+ 新专案」。

点击左上方「未命名的专案」重新命名专案。

这边我把专案取名为 My-Github-Repo-Notifier 方便日后辨识。
程式码输入区域:
// Constant variables
const lineToken = 'XXXX';
// Generate yours line notify bot token: https://notify-bot.line.me/my/
const githubWebhookSecret = "XXXXX";
// Generate yours secret string here: https://www.random.org/strings/?num=1&len=32&digits=on&upperalpha=on&loweralpha=on&unique=on&format=html&rnd=new
// HTTP Get/Post Handler
// 不开放 Get 方法
function doGet(e) {
return HtmlService.createHtmlOutput("Access Denied!");
}
// Github Webhook 会使用 Post 方法进来
function doPost(e) {
const content = JSON.parse(e.postData.contents);
// 安全性检查,确保请求是来自 Github Webhook
if (verifyGitHubWebhook(e) == false) {
return HtmlService.createHtmlOutput("Access Denied!");
}
// star payload data content["action"] == "started"
if(content["action"] != "started") {
return HtmlService.createHtmlOutput("OK!");
}
// 组合讯息
const message = makeMessageString(content);
// 发送讯息,也可改成发到 Slack,Telegram...
sendLineNotifyMessage(message);
return HtmlService.createHtmlOutput("OK!");
}
// Method
// 产生讯息内容
function makeMessageString(content) {
const repository = content["repository"];
const repositoryName = repository["name"];
const repositoryURL = repository["svn_url"];
const starsCount = repository["stargazers_count"];
const forksCount = repository["forks_count"];
const starrer = content["sender"]["login"];
var message = "🎉🎉「"+starrer+"」starred your「"+repositoryName+"」Repo 🎉🎉\n";
message += "Current total stars: "+starsCount+"\n";
message += "Current total forks: "+forksCount+"\n";
message += repositoryURL;
return message;
}
// 验证请求是否来自于 Github Webhook
// 因 GAS 限制 (https://issuetracker.google.com/issues/67764685?pli=1)
// 无法取得 Headers 内容
// 因此不能使用 Github Webhook 标准的验证方式 (https://docs.github.com/en/webhooks-and-events/webhooks/securing-your-webhooks)
// 只能手动用 ?secret=XXX 做匹配验证
function verifyGitHubWebhook(e) {
if (e.parameter["secret"] === githubWebhookSecret) {
return true
} else {
return false
}
}
// -- Send Message --
// Line
// 其他讯息传送方式可问 ChatGPT
function sendLineNotifyMessage(message) {
var url = 'https://notify-api.line.me/api/notify';
var options = {
method: 'post',
headers: {
'Authorization': 'Bearer '+lineToken
},
payload: {
'message': message
}
};
UrlFetchApp.fetch(url, options);
}
lineToken & githubWebhookSecret 带上前一步骤复制的值。
补充 Github Webook 当有人按 Star 时会打进来的资料如下:
{
"action": "created",
"starred_at": "2023-08-01T03:42:26Z",
"repository": {
"id": 602927147,
"node_id": "R_kgDOI-_wKw",
"name": "ZMarkupParser",
"full_name": "ZhgChgLi/ZMarkupParser",
"private": false,
"owner": {
"login": "ZhgChgLi",
"id": 83232222,
"node_id": "MDEyOk9yZ2FuaXphdGlvbjgzMjMyMjIy",
"avatar_url": "https://avatars.githubusercontent.com/u/83232222?v=4",
"gravatar_id": "",
"url": "https://api.github.com/users/ZhgChgLi",
"html_url": "https://github.com/ZhgChgLi",
"followers_url": "https://api.github.com/users/ZhgChgLi/followers",
"following_url": "https://api.github.com/users/ZhgChgLi/following{/other_user}",
"gists_url": "https://api.github.com/users/ZhgChgLi/gists{/gist_id}",
"starred_url": "https://api.github.com/users/ZhgChgLi/starred{/owner}{/repo}",
"subscriptions_url": "https://api.github.com/users/ZhgChgLi/subscriptions",
"organizations_url": "https://api.github.com/users/ZhgChgLi/orgs",
"repos_url": "https://api.github.com/users/ZhgChgLi/repos",
"events_url": "https://api.github.com/users/ZhgChgLi/events{/privacy}",
"received_events_url": "https://api.github.com/users/ZhgChgLi/received_events",
"type": "Organization",
"site_admin": false
},
"html_url": "https://github.com/ZhgChgLi/ZMarkupParser",
"description": "ZMarkupParser is a pure-Swift library that helps you convert HTML strings into NSAttributedString with customized styles and tags.",
"fork": false,
"url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser",
"forks_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/forks",
"keys_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/keys{/key_id}",
"collaborators_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/collaborators{/collaborator}",
"teams_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/teams",
"hooks_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/hooks",
"issue_events_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/issues/events{/number}",
"events_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/events",
"assignees_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/assignees{/user}",
"branches_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/branches{/branch}",
"tags_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/tags",
"blobs_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/git/blobs{/sha}",
"git_tags_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/git/tags{/sha}",
"git_refs_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/git/refs{/sha}",
"trees_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/git/trees{/sha}",
"statuses_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/statuses/{sha}",
"languages_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/languages",
"stargazers_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/stargazers",
"contributors_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/contributors",
"subscribers_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/subscribers",
"subscription_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/subscription",
"commits_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/commits{/sha}",
"git_commits_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/git/commits{/sha}",
"comments_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/comments{/number}",
"issue_comment_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/issues/comments{/number}",
"contents_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/contents/{+path}",
"compare_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/compare/{base}...{head}",
"merges_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/merges",
"archive_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/{archive_format}{/ref}",
"downloads_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/downloads",
"issues_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/issues{/number}",
"pulls_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/pulls{/number}",
"milestones_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/milestones{/number}",
"notifications_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/notifications{?since,all,participating}",
"labels_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/labels{/name}",
"releases_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/releases{/id}",
"deployments_url": "https://api.github.com/repos/ZhgChgLi/ZMarkupParser/deployments",
"created_at": "2023-02-17T08:41:37Z",
"updated_at": "2023-08-01T03:42:27Z",
"pushed_at": "2023-08-01T00:07:41Z",
"git_url": "git://github.com/ZhgChgLi/ZMarkupParser.git",
"ssh_url": "[email protected]:ZhgChgLi/ZMarkupParser.git",
"clone_url": "https://github.com/ZhgChgLi/ZMarkupParser.git",
"svn_url": "https://github.com/ZhgChgLi/ZMarkupParser",
"homepage": "https://zhgchg.li",
"size": 27449,
"stargazers_count": 187,
"watchers_count": 187,
"language": "Swift",
"has_issues": true,
"has_projects": true,
"has_downloads": true,
"has_wiki": true,
"has_pages": false,
"has_discussions": false,
"forks_count": 10,
"mirror_url": null,
"archived": false,
"disabled": false,
"open_issues_count": 2,
"license": {
"key": "mit",
"name": "MIT License",
"spdx_id": "MIT",
"url": "https://api.github.com/licenses/mit",
"node_id": "MDc6TGljZW5zZTEz"
},
"allow_forking": true,
"is_template": false,
"web_commit_signoff_required": false,
"topics": [
"cocoapods",
"html",
"html-converter",
"html-parser",
"html-renderer",
"ios",
"nsattributedstring",
"swift",
"swift-package",
"textfield",
"uikit",
"uilabel",
"uitextview"
],
"visibility": "public",
"forks": 10,
"open_issues": 2,
"watchers": 187,
"default_branch": "main"
},
"organization": {
"login": "ZhgChgLi",
"id": 83232222,
"node_id": "MDEyOk9yZ2FuaXphdGlvbjgzMjMyMjIy",
"url": "https://api.github.com/orgs/ZhgChgLi",
"repos_url": "https://api.github.com/orgs/ZhgChgLi/repos",
"events_url": "https://api.github.com/orgs/ZhgChgLi/events",
"hooks_url": "https://api.github.com/orgs/ZhgChgLi/hooks",
"issues_url": "https://api.github.com/orgs/ZhgChgLi/issues",
"members_url": "https://api.github.com/orgs/ZhgChgLi/members{/member}",
"public_members_url": "https://api.github.com/orgs/ZhgChgLi/public_members{/member}",
"avatar_url": "https://avatars.githubusercontent.com/u/83232222?v=4",
"description": "Building a Better World Together."
},
"sender": {
"login": "zhgtest",
"id": 4601621,
"node_id": "MDQ6VXNlcjQ2MDE2MjE=",
"avatar_url": "https://avatars.githubusercontent.com/u/4601621?v=4",
"gravatar_id": "",
"url": "https://api.github.com/users/zhgtest",
"html_url": "https://github.com/zhgtest",
"followers_url": "https://api.github.com/users/zhgtest/followers",
"following_url": "https://api.github.com/users/zhgtest/following{/other_user}",
"gists_url": "https://api.github.com/users/zhgtest/gists{/gist_id}",
"starred_url": "https://api.github.com/users/zhgtest/starred{/owner}{/repo}",
"subscriptions_url": "https://api.github.com/users/zhgtest/subscriptions",
"organizations_url": "https://api.github.com/users/zhgtest/orgs",
"repos_url": "https://api.github.com/users/zhgtest/repos",
"events_url": "https://api.github.com/users/zhgtest/events{/privacy}",
"received_events_url": "https://api.github.com/users/zhgtest/received_events",
"type": "User",
"site_admin": false
}
}
部署
完成程式撰写之后点击右上角「部署」->「新增部署作业」:

左侧选取类型选择「网页应用程式」:


-
新增说明:随意输入,我输入「
Release」 -
谁可以存取: 请改成「
所有人」 -
点击「部署」
首次部署,需要点击「授予存取权」:

跳出帐号选择 Pop-up 后选择自己当前的 Gmail 帐号:

出现「Google hasn’t verified this app」因为我们要开发的 App 是给自己用的,不需经过 Google 验证。
直接点击「Advanced」->「Go to XXX (unsafe)」->「Allow」即可:



完成部署后可在结果页面的「网页应用程式」得到 Request URL,点击「复制」并记下此 GAS 网址。

⚠️️️ 题外话,请注意如果程式码有修改需要更新部署才会生效⚠️
要使更改的程式码生效,同样点击右上角「部署」-> 选择「管理部署作业」->选择右上角的「✏️」->版本选择「建立新版本」->点击「部署」。


即可完成程式码更新部署。
Github Webhook 设定
-
回到 Github
-
我们可以对 Organizations (里面所有 Repo)或单个 Repo 设定 Webhook,监听新的 ⭐️ 星星
进入 Organizations / Repo -> 「Settings」-> 左侧找到「Webhooks」-> 「Add webhook」:


-
Payload URL : 输入
GAS 网址并在网址后面手动加上我们自己的安全验证字串?secret=githubWebhookSecret。 例如你的GAS 网址是https://script.google.com/macros/s/XXX/exec、githubWebhookSecret是123456;则 网址即为:https://script.google.com/macros/s/XXX/exec?secret=123456。 -
Content type: 选择
application/json -
Which events would you like to trigger this webhook? 选择「
Let me select individual events.」 ⚠️️取消勾选「Pushes」 ️️️️⚠️勾选「Watches」,请注意不是「Stars」(但 Stars 也是监控点击星星的状态,如果用 Stars GAS 的 action 判断也需要调整 ) -
选择「
Active」 -
点击「Add webhook」
-
完成设定
🚀测试
回到 设定的 Organizations Repo / Repo 上点击「Star」或先 un-star 再重新 「Star」:

就会收到推播通知啰!

收工!🎉🎉🎉🎉



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