feat(watch): pure-shell polling fallback when watchers are missing#793
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… missing The 'watch' subcommand hard-failed when neither watcher was installed. It now degrades to a pure-shell polling loop (find -newer sentinel), prints a one-line notice, and reruns on created/modified .sh files. Interval configurable via BASHUNIT_WATCH_INTERVAL (default 2s, positive integer, invalid values fall back to default). Closes #779
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🤔 Background
Related #779
The
watchsubcommand hard-failed when neitherinotifywaitnorfswatchwas installed — a dead end on CI containers, fresh macOS machines, and minimal images.💡 Changes
watchnow degrades to a pure-shell polling loop instead of exiting, printing a one-line notice; installing a watcher still gives instant, event-driven triggersfind -neweragainst a sentinel (POSIX, no GNU/BSDstatdivergence); created/modified.shfiles trigger a rerun, deletions are not detected on this pathBASHUNIT_WATCH_INTERVAL(default2s, positive integer, invalid values fall back to the default)