Problem

Running WATCHMAN_SOCK=/tmp/watchman.sock watchman spawns a service with a service inside <STATEDIR>/<USER>, when I would expect the environment variable to act like the command line flag --unix-listener-path=/tmp/watchman.sock.

When supplying both

WATCHMAN_SOCK=/tmp/watchman.sock watchman --unix-listener-path=/tmp/foo.sock

I would expect the command line flag to take precedence.

Motivation

I'd like to define WATCHMAN_SOCK once inside my environment variables to

• have watchman respect that value when spawning the service for me
• have other services that query Watchman know which socket to call, instead of having to spawn watchman get-sockname on each invocation, or once and then caching the result somehow.