Rename BUILD to BUILD.bazel. (#36)

* Rename BUILD to BUILD.bazel.

This fixes an error on macOS due to `build` and `BUILD` having conflicting names.

* Enable macos-latest in GitHub Actions CI.

* Fix concurrency key in GitHub Actions.

Use matrix configuration in concurrency key.

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: Build
+name: build
 
 # Trigger on push or via manual dispatch.
 on: [push, workflow_dispatch]
@@ -13,10 +13,10 @@ jobs:
       fail-fast: false
       matrix:
         type: ['Release']
-        os: ['ubuntu-latest']
+        os: ['ubuntu-latest', 'macos-latest']
 
     concurrency:
-      group: ${{ github.workflow }}-${{ github.ref }}
+      group: ${{ github.workflow }}-${{ github.ref }}-${{ matrix.os }}-${{ matrix.type }}
       cancel-in-progress: true
 
     steps:

BUILD.bazel

@@ -114,54 +114,3 @@ cc_binary(
         "//:thread_pool",
     ],
 )
-
-# copybara:strip_begin
-cc_binary(
-    name = "run_csv",
-    srcs = [
-        "run_csv.cc",
-    ],
-    deps = [
-        ":app",
-        ":args",
-        ":gemma_lib",
-        "//compression:compress",
-        # copybara:import_next_line:hwy
-        "//:hwy",
-        # copybara:import_next_line:hwy
-        "//:nanobenchmark",
-        # copybara:import_next_line:hwy
-        "//:profiler",
-        # copybara:import_next_line:hwy
-        "//:thread_pool",
-        "//third_party/riegeli/bytes:file_reader",
-        "//third_party/riegeli/bytes:file_writer",
-        "//third_party/riegeli/csv:csv_reader",
-        "//third_party/riegeli/csv:csv_writer",
-    ],
-)
-
-gensignature(
-    name = "gemma_sign",
-    srcs = [":gemma"],
-)
-
-cc_test(
-    name = "benchmarks",
-    size = "large",
-    srcs = [
-        "benchmarks.cc",
-    ],
-    tags = ["notap"],
-    deps = [
-        ":app",
-        ":gemma_lib",
-        "//third_party/benchmark",
-        # copybara:import_next_line:hwy
-        "//:hwy",
-        # copybara:import_next_line:hwy
-        "//:thread_pool",
-    ],
-)
-
-# copybara:strip_end