Set up pants.ini for remoting

pants.ini

@@ -83,6 +83,17 @@ pants_ignore: +[
     '/build-support/bin/native/src',
   ]
 
+remote_execution_server: remotebuildexecution.googleapis.com
+remote_store_server: remotebuildexecution.googleapis.com
+# This file might not exist on your machine. If this default fails, run `find /usr -name '*.pem'`
+# and override this value via the env var PANTS_REMOTE_CA_CERTS_PATH.
+remote_ca_certs_path: /usr/local/etc/openssl/cert.pem
+remote_instance_name: projects/pants-remoting-beta/instances/default_instance
+remote_execution_extra_platform_properties: [
+    # This allows network requests, e.g. to resolve dependencies with Pex.
+    "dockerNetwork=standard",
+    "container-image=docker://marketplace.gcr.io/google/rbe-ubuntu16-04@sha256:da0f21c71abce3bbb92c3a0c44c3737f007a82b60f8bd2930abc55fe64fc2729",
+  ]
 
 [cache]
 # Caching is on globally by default, but we disable it here for development purposes.
@@ -388,11 +399,28 @@ verify_commit: False
 
 
 [python-setup]
+interpreter_search_paths: [
+     '<PEXRC>',
+     '<PATH>'
+     # TODO(#7735): We need to add this entry for remoting to be able to discover a valid
+     # interpreter, because <PATH> will refer to the host PATH and not the remote value. This value
+     # was found by inspecting the docker image for remoting.
+     "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/python3.6/bin:/usr/local/go/bin",
+  ]
 interpreter_constraints: ["CPython>=3.6,<4"]
 interpreter_cache_dir: %(pants_bootstrapdir)s/python_cache/interpreters
 resolver_cache_dir: %(pants_bootstrapdir)s/python_cache/requirements
 
 
+[python-native-code]
+# TODO(#7735): These two lines are necessary to get remoting working, but it will likely cause
+# failures when running locally on macOS. What we really want is some way to say that when remoting
+# on Linux, set these values to none; when running locally on macOS, use the default env var values.
+# REMOTING: uncomment these two lines when remoting tests.
+# ld_flags: []
+# cpp_flags: []
+
+
 [test.pytest]
 timeouts: true
 timeout_default: 60