Don't have a top-level runners array

Author: mdboom

CHANGELOG.md

@@ -0,0 +1,11 @@
+## Unreleased
+
+### bench_runner.toml change
+
+The configuration no longer expects a top-level, single element `runners` array.
+
+You should remove the following line from your `bench_runners.toml`:
+
+```
+[[runners]]
+```

bench_runner/runners.py

@@ -47,7 +47,7 @@ def display_name(self) -> str:
 
 @functools.cache
 def get_runners() -> list[Runner]:
-    conf = config.get_bench_runner_config().get("runners", [{}])[0]
+    conf = config.get_bench_runner_config().get("runners", {})
     runners = []
     for nickname, section in conf.items():
         runners.append(

bench_runner/templates/bench_runner.toml

@@ -42,7 +42,6 @@ notification_issue = 182
 #   --enable-optimizations and --with-lto=full.
 # BUILD_DEST: (windows only) where to make build.bat install. This is
 #   required for the Windows build to succeed.
-[[runners]]
 
 [runners.linux]
 os = "linux"