The per-repo open-task dedupe filtered ProjectTable.git_url == git_url
(exact), while the orchestrator collapses its poll set by repo_key
(lower / strip trailing '/' / drop '.git'). Two projects whose git_url
differs only by those accidentals (a monorepo's cell-projects, or a
re-registered canonical project) defeated the one-open-task-per-repo
invariant and opened duplicate fix / dep-update tasks. Extract
roboco.utils.converters.repo_key as the single source and match the
dedupe query on its SQL mirror (regexp_replace(rtrim(lower(...)))).
The ci_watch (git_url, workflow) dedupe used func.coalesce(ci_watch_workflow,
default), but SQL COALESCE only substitutes for NULL — a project saved with
ci_watch_workflow='' (reachable via panel/API) yielded coalesce('', default)
= '' != default, so the DB diverged from the engine/orchestrator (which
collapse '' to the default via Python truthiness) and opened a duplicate
fix task every red cycle. Wrap with func.nullif(..., '') so an empty string
collapses to the default too.
Tests: a ''-workflow + NULL-workflow project on one repo dedupe to one task;
git_url accidentals (.git suffix / trailing slash) dedupe across both
ci_watch and dep_update. The orchestrator _repo_key now delegates to repo_key.
Renn F
d34bc1a7a5