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[Rails]Github APIを使ってみる

2023/08/08に公開
Rails
Octokit
tech

はじめに

octokitgemを使ってGithub APIを触ってみました。

Octokitは、GitHubのAPIを簡単に利用するためのGemです。
そのAPIを使用することで、外部アプリケーションからGitHubの機能を操作できるようになります。

deviseとomniauthでGithubログインはすでに実装済みです。

https://github.com/octokit/octokit.rb
https://www.rubydoc.info/gems/octokit

環境

Rails 7.0.4.3
ruby 3.2.1

Octokitをインストールする

gem 'octokit'

bundle install

ユーザーを取得する

GETリクエスト先：https://api.github.com/users
githubログイン後uidでユーザーを取得することができます。

irb(main):020:0> client = Octokit::Client.new
=> #<Octokit::Client:0x000000010b9e5a00 ...>
irb(main):021:0> client.user(uid)
=> 
{
  "login": "octocat",
  "id": 1,
  "node_id": "MDQ6VXNlcjE=",
  "avatar_url": "https://github.com/images/error/octocat_happy.gif",
  "gravatar_id": "",
  "url": "https://api.github.com/users/octocat",
  "html_url": "https://github.com/octocat",
  "followers_url": "https://api.github.com/users/octocat/followers",
  "following_url": "https://api.github.com/users/octocat/following{/other_user}",
  "gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
  "starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
  "subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
  "organizations_url": "https://api.github.com/users/octocat/orgs",
  "repos_url": "https://api.github.com/users/octocat/repos",
  "events_url": "https://api.github.com/users/octocat/events{/privacy}",
  "received_events_url": "https://api.github.com/users/octocat/received_events",
  "type": "User",
  "site_admin": false,
  "name": "monalisa octocat",
  "company": "GitHub",
  "blog": "https://github.com/blog",
  "location": "San Francisco",
  "email": "octocat@github.com",
  "hireable": false,
  "bio": "There once was...",
  "twitter_username": "monatheoctocat",
  "public_repos": 2,
  "public_gists": 1,
  "followers": 20,
  "following": 0,
  "created_at": "2008-01-14T04:33:35Z",
  "updated_at": "2008-01-14T04:33:35Z"
}

https://docs.github.com/en/rest/users/users?apiVersion=2022-11-28#get-a-user

レポジトリ一覧を取得する

def get_github_user
   @client ||= Octokit::Client.new
   @user = @client.user(current_user.uid)
   @repositories = @client.repos(@user.login, query: {type: 'owner', sort: 'desc'})
end

ページ上に一覧を表示させます。

<%= form.label :repository_id %>
<%= select_tag "project[repository_id]", options_from_collection_for_select(@repositories, "id", "full_name") %>

レポジトリのオーナーと名前を取得します。

repository = params[:repository_id]
owner, repo = repository.split('/')
contents = client.contents("#{owner}/#{repo}")

レポジトリの中身を取得する

GETリクエスト先：https://api.github.com/repos/
/repos/{owner}/{repo}/contents/{path}からレポジトリの中身を取得するとこができます。
readme.mdを取得してみます。

irb(main):051:0> readme = client.contents('username/repository', path: 'readme.md')
=> 
{
  "type": "file",
  "encoding": "base64",
  "size": 5362,
  "name": "README.md",
  "path": "README.md",
  "content": "IyBZb2dhIEJvmsgaW4gcHJvZ3Jlc3MhIEZlZWwgdAoKOndhcm5pbmc6IFdvc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\\nIHdvcmtmbG93Lgo=\\n",
  "sha": "3d21ec53a331a6f037a91c368710b99387d012c1",
  "url": "https://api.github.com/repos/octokit/octokit.rb/contents/README.md",
  "git_url": "https://api.github.com/repos/octokit/octokit.rb/git/blobs/3d21ec53a331a6f037a91c368710b99387d012c1",
  "html_url": "https://github.com/octokit/octokit.rb/blob/master/README.md",
  "download_url": "https://raw.githubusercontent.com/octokit/octokit.rb/master/README.md",
  "_links": {
    "git": "https://api.github.com/repos/octokit/octokit.rb/git/blobs/3d21ec53a331a6f037a91c368710b99387d012c1",
    "self": "https://api.github.com/repos/octokit/octokit.rb/contents/README.md",
    "html": "https://github.com/octokit/octokit.rb/blob/master/README.md"
  }
}
irb(main):052:0> readme.content
=> "IyBZb2dhIEJvmsgaW4gcHJvZ3Jlc3MhIEZlZWwgdAoKOndhcm5pbmc6IFdvc\\nZnJlZSBmUgdG8gY0byBjaGVjayBvdXQgdGhlIGFwcCwgYnV0IGJlIHN1c29t\\nZSBiYWNrIG9uY2UgaXQgaXMgY29tcGxldGUuCgpBIHdlYiBhcHAgdGhhdCBs\\nZWFkcyB5b3UgdGhyb3VnaCBhIHlvZ2Egc2Vzc2lvbi4KCltXb3Jrb3V0IG5v\\ndyFdKGh0dHBzOi8vc2tlZHdhcmRzODguZ2l0aHViLmlvL3lvZ2EvKQoKPGlt\\nZyBzcmM9InNyYy9pbWFnZXMvbWFza2FibGVfaWNvbl81MTIucG5nIiBhbHQ9\\nImJvdCBsaWZ0aW5nIHdlaWdodHMiIHdpZHRoPSIxMDAiLz4KCkRvIHlvdSBo\\nYXZlIGZlZWRiYWNrIG9yIGlkZWFzIGZvciBpbXByb3ZlbWVudD8gW09wZW4g\\nYW4gaXNzdWVdKGh0dHBzOi8vZ2l0aHViLmNvbS9za2Vkd2FyZHM4OC95b2dh\\nL2lzc3Vlcy9uZXcpLgoKV2FudCBtb3JlIGdhbWVzPyBWaXNpdCBbQ25TIEdh\\nbWVzXShodHRwczovL3NrZWR3YXJkczg4LmdpdGh1Yi5pby9wb3J0Zm9saW8v\\nKS4KCiMjIERldmVsb3BtZW50CgpUbyBhZGQgYSBuZXcgcG9zZSwgYWRkIGFu\\nIGVudHJ5IHRvIHRoZSByZWxldmFudCBmaWxlIGluIGBzcmMvYXNhbmFzYC4K\\nClRvIGJ1aWxkLCBydW4gYG5wbSBydW4gYnVpbGRgLgoKVG8gcnVuIGxvY2Fs\\nbHkgd2l0aCBsaXZlIHJlbG9hZGluZyBhbmQgbm8gc2VydmljZSB3b3JrZXIs\\nIHJ1biBgbnBtIHJ1biBkZXZgLiAoSWYgYSBzZXJ2aWNlIHdvcmtlciB3YXMg\\ncHJldmlvdXNseSByZWdpc3RlcmVkLCB5b3UgY2FuIHVucmVnaXN0ZXIgaXQg\\naW4gY2hyb21lIGRldmVsb3BlciB0b29sczogYEFwcGxpY2F0aW9uYCA+IGBT\\nZXJ2aWNlIHdvcmtlcnNgID4gYFVucmVnaXN0ZXJgLikKClRvIHJ1biBsb2Nh\\nbGx5IGFuZCByZWdpc3RlciB0aGUgc2VydmljZSB3b3JrZXIsIHJ1biBgbnBt\\nIHN0YXJ0YC4KClRvIGRlcGxveSwgcHVzaCB0byBgbWFpbmAgb3IgbWFudWFs\\nbHkgdHJpZ2dlciB0aGUgYC5naXRodWIvd29ya2Zsb3dzL2RlcGxveS55bWxg\\nIHdvcmtmbG93Lgo=\\n"

ファイルの内容をデーコードする必要があります。

def fetch_readme
     readme = contents.find { |content| content.name.downcase == 'readme.md' } || ''
            
     if readme_content
          decoded_readme = Base64.decode64(readme.content)
          params[:read_me] = decoded_readme
          decoded_readme
     else
          puts "READMEを見つかりませんでした。"
     end
end

https://docs.github.com/en/rest/repos/contents?apiVersion=2022-11-28

終わりに

簡単ですがgithubAPIを通してユーザーとリポジトリを取得してみました。

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