3 people f671c3dc59 [web] read a linked project file's source from history (#36817) ...

* [web] read a linked project file's source from history

Behind the `linked-file-from-history` flag, a linked `project_file` import reads
the source out of the source project's latest history snapshot rather than out of
its file tree in mongo, where docs and files are two kinds of thing.

- `ProjectFileAgent` gains `_importFromHistory` alongside the existing
  `_importFromProject`, and the flag picks between them. The snapshot only holds
  what has reached history, so the source project is flushed through
  document-updater and project-history first. A file that is editable is loaded
  eagerly, which applies the edit operations sitting on top of its blob; one that
  is not keeps its hash and is streamed. The file is promisified on the way.
- `History/HistoryOTContentManager.mjs` reads the latest chunk and rolls its
  changes into a snapshot, retrying the read. `History/HistoryBlobStore.mjs` is
  the blob store overleaf-editor-core asks for while loading a file.
- `LinkedFilesController` resolves the flag, including from the referer: the
  import endpoints have no query string of their own. Every agent takes the
  assignment so that the ones that do not read it still pass it along.
- `linked-file-from-history.spec.ts` drives the flag from the editor url, over
  three imports from another project: a file uploaded to the source project and
  then refreshed from it, an edit the source project has only made in its editor,
  and a binary file. Both sources produce the same file, so which one was read is
  asserted in the acceptance tests rather than here.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* [saas-e2e] add test coverage for tracked-delete in linked file source

* Apply suggestions from code review

Co-authored-by: Mathias Jakobsen <mathias.jakobsen@overleaf.com>

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Co-authored-by: Mathias Jakobsen <mathias.jakobsen@overleaf.com>
GitOrigin-RevId: 3907d6d399e4b5315e68bf833663c06bc72f4011

2026-09-17 12:02:47 +00:00

..

src

[web] read a linked project file's source from history (#36817)

2026-09-17 12:02:47 +00:00

bootstrap.mjs

[web] add metrics for mongo access in split test system (#32920)

2026-04-21 08:05:14 +00:00

tsconfig.json

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