jh/builtin-fsmonitor, was Re: What's cooking in git.git (Jun 2021, #06; Thu, 17)

> * jh/builtin-fsmonitor (2021-05-24) 30 commits
>  - t/perf: avoid copying builtin fsmonitor files into test repo
>  - t7527: test status with untracked-cache and fsmonitor--daemon
>  - p7519: add fsmonitor--daemon
>  - t7527: create test for fsmonitor--daemon
>  - fsmonitor: force update index after large responses
>  - fsmonitor: enhance existing comments
>  - fsmonitor--daemon: use a cookie file to sync with file system
>  - fsmonitor--daemon: periodically truncate list of modified files
>  - fsmonitor--daemon: implement handle_client callback
>  - fsmonitor-fs-listen-macos: implement FSEvent listener on MacOS
>  - fsmonitor-fs-listen-macos: add macos header files for FSEvent
>  - fsmonitor-fs-listen-win32: implement FSMonitor backend on Windows
>  - fsmonitor--daemon: create token-based changed path cache
>  - fsmonitor--daemon: define token-ids
>  - fsmonitor--daemon: add pathname classification
>  - fsmonitor--daemon: implement daemon command options
>  - fsmonitor-fs-listen-macos: stub in backend for MacOS
>  - fsmonitor-fs-listen-win32: stub in backend for Windows
>  - t/helper/fsmonitor-client: create IPC client to talk to FSMonitor Daemon
>  - fsmonitor--daemon: implement client command options
>  - fsmonitor--daemon: add a built-in fsmonitor daemon
>  - fsmonitor: introduce `core.useBuiltinFSMonitor` to call the daemon via IPC
>  - config: FSMonitor is repository-specific
>  - help: include fsmonitor--daemon feature flag in version info
>  - fsmonitor-ipc: create client routines for git-fsmonitor--daemon
>  - fsmonitor--daemon: update fsmonitor documentation
>  - fsmonitor--daemon: man page
>  - simple-ipc: preparations for supporting binary messages.
>  - Merge branch 'jk/perf-in-worktrees' into HEAD
>  - Merge branch 'jh/simple-ipc' into jh/rfc-builtin-fsmonitor
>
>  An attempt to write and ship with a watchman equivalent tailored
>  for our use.
>
>  What's the status of this one?