Stop relying on "GUIX_ENVIRONMENT" envvar

While we run the service under GNU Guix, there is no telling where
anyone else with access to the code (which is open-source) will run
the application. This means we need a more dynamic way to get the
paths for any commands we choose to run.

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/conftest.py b/tests/conftest.py
index be5f9f2..d8aca81 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,6 +1,7 @@
 """Set up fixtures for tests"""
 import io
 import os
+import shutil
 import socket
 import subprocess
 from contextlib import closing
@@ -28,8 +29,7 @@ def redis_url():
     "Fixture to launch a new redis instance and return appropriate URI"
     port = next(# pylint: disable=[stop-iteration-return]
         port for port in range(6379,65535) if not is_port_in_use(port))
-    redis_path = f"{os.getenv('GUIX_ENVIRONMENT')}/bin/redis-server"
-    command = [redis_path, "--port", str(port)]
+    command = [shutil.which("redis-server"), "--port", str(port)]
     process = subprocess.Popen(command) # pylint: disable=[consider-using-with]
     yield f"redis://localhost:{port}"
     process.kill()