Without this, we have one `pyre` process running across different pyre
projects. With this change, files in different projects can be linted
with pyre at the same time.
Co-authored-by: Oliver Ruben Albertini <ora@fb.com>
It's necessary to provide a `-l` option to pyre with the closest parent
directory containing a `.pyre_configuration.local` file, or simply
change directory (cwd) to the root of the pyre project. Thanks to Ken
Verbosky for the code that fixes this.
Error seen when not using such a solution:
```
1031.473923 on 6: Dropping message 'ƛ Background task unexpectedly quited: Invalid configuration: Cannot find any source files to analyze. Either `source_directories` or `targets` must be specified.
```
Issue with this approach is that if you are editing files under
different projects, the `pyre persistent` process is not re-created for
each file. We have to do `:ALEStopAlllsps` in order for the process to
start with the new working directory.
Co-authored-by: Oliver Ruben Albertini <ora@fb.com>
