marcelsafin fb64ddd48c fix(workflow): preserve prior catalog install on reinstall registry-save failure ...

_install_workflow_from_catalog's final registry.add() failure handler
unconditionally rmtree'd workflow_dir. That's safe for a brand-new
install, but plain `workflow add <catalog-id>` also allows re-adding an
already-installed workflow, downloading the new version over the
existing directory first. If registry.add() then failed to save, the
unconditional rmtree deleted the prior working install while the
registry (after its own rollback) still reported it installed -- data
loss with no way back. workflow_update already avoids this via an outer
backup/restore around this function, but plain add has no such caller.

Fix mirrors _validate_and_install_local's existed-before/backup-aware
handling: capture whether workflow_dir existed and back up its
workflow.yml bytes before any download write, then on a registry.add()
OSError, restore those bytes for a reinstall or rmtree only a
brand-new directory. Only one file (workflow.yml) is ever written by
this path, so no further per-file bookkeeping is needed.

Added a failing-first regression: install a catalog workflow, re-add it
with a simulated registry save OSError, and assert a clean error, the
original workflow.yml restored byte-for-byte, and the registry still
reporting the original version installed. Confirmed red (prior file
deleted) before the fix, green after.

Assisted-by: GitHub Copilot (model: Claude Sonnet 5, autonomous)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

2026-07-11 02:28:48 +02:00

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