Adds migration from bitbucket.org as the Cloud variant of the Bitbucket
entry, in the web UI and via `POST /repos/migrate` with
`service=bitbucket`. It migrates the repository and pull requests with
their comments and reviews. Bitbucket Cloud has no releases, and
Atlassian removed its issues and wikis on 2026-08-20
(https://community.atlassian.com/forums/Bitbucket-articles/Announcing-sunset-of-Bitbucket-Issues-and-Wikis/ba-p/3193882).
- Private repositories need an API or access token, which also raises
the rate limit.
- Rate-limited requests back off and retry, Bitbucket sends no
`Retry-After`.
- Tests replay recorded responses, set `BITBUCKET_READ_TOKEN` to
re-record.
Co-authored-by: silverwind <me@silverwind.io>
Add migration from Bitbucket Server (Data Center). It has no issues,
wiki, milestones or releases, so those are not offered.
Migrated: git data with tags and LFS, and pull requests with state,
draft flag, merge commit/base, comments, approvals and inline code
comments including resolved threads. Multi-line ranges become a `Lines
a-b:` text prefix, as Gitea anchors code comments to one line. Auth is
an HTTP access token (personal, project or repository) or
username/password; 429 responses are retried.
Changes outside the downloader:
- `ReviewComment.Resolved`, applied by the uploader.
- The uploader creates a fork PR's head branch from its head commit when
already in the repository, instead of fetching the fork (Bitbucket keeps
it in `refs/pull-requests/<id>/from`; private forks need credentials).
Tested with unit tests, responses recorded from Bitbucket 10.5.1, and an
end-to-end migration. Independent of
https://github.com/go-gitea/gitea/pull/38607 (Bitbucket Cloud); the
service type enum value needs adjusting for whichever lands second.
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Co-authored-by: bircni <bircni@icloud.com>
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