2020-05-22 GitHub Actions を作ってみる
@github/core
はワークフローコマンドのラッパー
https://help.github.com/ja/actions/reference/workflow-commands-for-github-actions
saveState の実装はここ
https://github.com/actions/toolkit/find/master
github context
https://help.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#github-context
@actions/github
の context とは別っぽい
環境変数経由でアクセスできる
https://help.github.com/ja/actions/configuring-and-managing-workflows/using-environment-variables