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filesystem: move_file fails across filesystems (EXDEV) #5188
Description
Problem
moveFile in src/filesystem/lib.ts checks that the destination does not exist and then calls fs.rename. rename cannot cross a device boundary, so a move between two allowed directories on different mounts (a container bind mount, a network share, a second disk) fails with EXDEV.
Expected
On EXDEV, fall back to copying and then removing the source. The fallback keeps the no-overwrite contract, leaves no partial destination behind if it fails, and does not follow symlinks out of the allowed directories while copying.
Prior work
The PR(s) above targeted the pre-refactor code and are closed as part of the backlog triage in #4875; this issue is where the work continues, with the PR(s) as a prototype. Thank you to their authors.
Activity
cliffhall commentedon Oct 20, 2026
Triage: Priority Medium (total 6)
buglabelFiled from the PR backlog triage (#4877). Board: Servers V2 (#43), Status
Incoming, awaiting maintainer review (no milestone yet).fix(filesystem): move a file across filesystems by copying it (#5188)
fix(filesystem): move a file across filesystems by copying it (#5188)
fix(filesystem): move a file across filesystems by copying it (#5188)
cliffhall commentedon Oct 27, 2026
Fixed by #5322, merged into v2/main.
feat(filesystem): add a copy_file tool