How do I limit the max size of a repository?

Install/Maintain/Configure
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Such as title,how do I limit the max size of a repository?

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It is not implemented yet, you can track progress here Repository Size Limit · Issue #3658 · go-gitea/gitea · GitHub.

You can limit number of repositories, see [repository] MAX_CREATION_LIMIT, [repository] ALLOW_FORK_WITHOUT_MAXIMUM_LIMIT, and related limits Config Cheat Sheet

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Please track Limit repo size by DmitryFrolovTri · Pull Request #21820 · go-gitea/gitea · GitHub