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    Merge branch '22348-gitea-importer' into 'master' · 3a217d5eeb1d
    Rémy Coutable authored
    It adds a brand new importer for Gitea!
    
    This is a continuation of !6945 started by @bkc.
    
    Gitea aims to be 100% GitHub-compatible but there's a few differences:
    
    - Gitea is not an OAuth provider (yet): https://github.com/go-gitea/gitea/issues/27
      - This means we cannot map Gitea users given an assignee ID => assignees are not set on imported issues and merge requests
    - No releases API for now: https://github.com/go-gitea/gitea/issues/330
    - API version is `v1` (GitHub is `v3`)
    - The IID field for milestones is `id` compared to `number` in GitHub.
    - Issues, PRs, milestones, labels don't have a `url` field (the importer now fallback to `''` in that case)
    
    **Known issues:**
    
    - Comments are not imported because comments JSON always have a blank `html_url`/`issue_url`/`pull_request_url`, so the IID cannot be extracted and the issuable cannot be found... :( This is tracked in https://github.com/go-gitea/gitea/issues/401, and solved by https://github.com/gogits/gogs/pull/3624 but this needs to be submitted / merged in Gitea.
    
    This is noted in the documentation.
    
    ## Are there points in the code the reviewer needs to double check?
    
    1. I've made `Import::GiteaController` inherit from `Import::GithubController` since both controllers should be identical in the long-term and their current differences are small.
    1. I've added a base `IssuableFormatter` class from which `IssueFormatter` & `PullRequestFormatter` inherit
    1. I've added shared examples for GitHub/Gitea importer classes
    1. I've made `Gitlab::ImportSources` more robust and tested! 🎄
    1. I've added routing specs for import routes! 🎄
    
    Closes #22348
    
    See merge request !8116
    3a217d5eeb1d