Rename `BUILD` -> `BUILD.bazel` (#946)

diff --git a/BUILD b/BUILD.bazel
similarity index 98%
rename from BUILD
rename to BUILD.bazel
index cb92935..654e014 100644
--- a/BUILD
+++ b/BUILD.bazel
@@ -27,7 +27,7 @@
 filegroup(
     name = "distribution",
     srcs = [
-        "BUILD",
+        "BUILD.bazel",
         "MODULE.bazel",
         "WORKSPACE",
         "internal_deps.bzl",
diff --git a/docs/BUILD b/docs/BUILD.bazel
similarity index 100%
rename from docs/BUILD
rename to docs/BUILD.bazel
diff --git a/examples/BUILD b/examples/BUILD.bazel
similarity index 100%
rename from examples/BUILD
rename to examples/BUILD.bazel
diff --git a/examples/build_file_generation/BUILD b/examples/build_file_generation/BUILD.bazel
similarity index 100%
rename from examples/build_file_generation/BUILD
rename to examples/build_file_generation/BUILD.bazel
diff --git a/examples/build_file_generation/random_number_generator/BUILD b/examples/build_file_generation/random_number_generator/BUILD.bazel
similarity index 100%
rename from examples/build_file_generation/random_number_generator/BUILD
rename to examples/build_file_generation/random_number_generator/BUILD.bazel
diff --git a/examples/pip_install/BUILD b/examples/pip_install/BUILD.bazel
similarity index 100%
rename from examples/pip_install/BUILD
rename to examples/pip_install/BUILD.bazel
diff --git a/examples/pip_parse/BUILD b/examples/pip_parse/BUILD.bazel
similarity index 100%
rename from examples/pip_parse/BUILD
rename to examples/pip_parse/BUILD.bazel
diff --git a/examples/pip_parse_vendored/BUILD b/examples/pip_parse_vendored/BUILD.bazel
similarity index 100%
rename from examples/pip_parse_vendored/BUILD
rename to examples/pip_parse_vendored/BUILD.bazel
diff --git a/examples/pip_repository_annotations/BUILD b/examples/pip_repository_annotations/BUILD.bazel
similarity index 100%
rename from examples/pip_repository_annotations/BUILD
rename to examples/pip_repository_annotations/BUILD.bazel
diff --git a/examples/wheel/BUILD b/examples/wheel/BUILD.bazel
similarity index 100%
rename from examples/wheel/BUILD
rename to examples/wheel/BUILD.bazel
diff --git a/examples/wheel/lib/BUILD b/examples/wheel/lib/BUILD.bazel
similarity index 100%
rename from examples/wheel/lib/BUILD
rename to examples/wheel/lib/BUILD.bazel
diff --git a/examples/wheel/private/BUILD b/examples/wheel/private/BUILD.bazel
similarity index 100%
rename from examples/wheel/private/BUILD
rename to examples/wheel/private/BUILD.bazel
diff --git a/python/BUILD b/python/BUILD.bazel
similarity index 100%
rename from python/BUILD
rename to python/BUILD.bazel
diff --git a/python/constraints/BUILD b/python/constraints/BUILD.bazel
similarity index 100%
rename from python/constraints/BUILD
rename to python/constraints/BUILD.bazel
diff --git a/python/pip_install/BUILD b/python/pip_install/BUILD.bazel
similarity index 96%
rename from python/pip_install/BUILD
rename to python/pip_install/BUILD.bazel
index 9ff5137..9fbc8e8 100644
--- a/python/pip_install/BUILD
+++ b/python/pip_install/BUILD.bazel
@@ -3,7 +3,7 @@
 filegroup(
     name = "distribution",
     srcs = glob(["*.bzl"]) + [
-        "BUILD",
+        "BUILD.bazel",
         "pip_compile.py",
         "//python/pip_install/extract_wheels:distribution",
         "//python/pip_install/private:distribution",
diff --git a/python/pip_install/extract_wheels/BUILD b/python/pip_install/extract_wheels/BUILD.bazel
similarity index 100%
rename from python/pip_install/extract_wheels/BUILD
rename to python/pip_install/extract_wheels/BUILD.bazel
diff --git a/python/pip_install/pip_repository.bzl b/python/pip_install/pip_repository.bzl
index 101ec6a..9c23344 100644
--- a/python/pip_install/pip_repository.bzl
+++ b/python/pip_install/pip_repository.bzl
@@ -21,7 +21,7 @@
     """
 
     # Get the root directory of these rules
-    rules_root = rctx.path(Label("//:BUILD")).dirname
+    rules_root = rctx.path(Label("//:BUILD.bazel")).dirname
     thirdparty_roots = [
         # Includes all the external dependencies from repositories.bzl
         rctx.path(Label("@" + repo + "//:BUILD.bazel")).dirname
diff --git a/python/pip_install/private/BUILD b/python/pip_install/private/BUILD.bazel
similarity index 100%
rename from python/pip_install/private/BUILD
rename to python/pip_install/private/BUILD.bazel
diff --git a/python/pip_install/private/test/BUILD b/python/pip_install/private/test/BUILD.bazel
similarity index 100%
rename from python/pip_install/private/test/BUILD
rename to python/pip_install/private/test/BUILD.bazel
diff --git a/python/private/BUILD b/python/private/BUILD.bazel
similarity index 100%
rename from python/private/BUILD
rename to python/private/BUILD.bazel
diff --git a/python/runfiles/BUILD b/python/runfiles/BUILD.bazel
similarity index 100%
rename from python/runfiles/BUILD
rename to python/runfiles/BUILD.bazel
diff --git a/tests/BUILD b/tests/BUILD.bazel
similarity index 100%
rename from tests/BUILD
rename to tests/BUILD.bazel
diff --git a/tests/load_from_macro/BUILD b/tests/load_from_macro/BUILD.bazel
similarity index 100%
rename from tests/load_from_macro/BUILD
rename to tests/load_from_macro/BUILD.bazel
diff --git a/tests/pip_repository_entry_points/BUILD b/tests/pip_repository_entry_points/BUILD.bazel
similarity index 100%
rename from tests/pip_repository_entry_points/BUILD
rename to tests/pip_repository_entry_points/BUILD.bazel
diff --git a/tools/BUILD b/tools/BUILD.bazel
similarity index 97%
rename from tools/BUILD
rename to tools/BUILD.bazel
index 789bc2b..7c9b492 100644
--- a/tools/BUILD
+++ b/tools/BUILD.bazel
@@ -26,7 +26,7 @@
 filegroup(
     name = "distribution",
     srcs = [
-        "BUILD",
+        "BUILD.bazel",
         "wheelmaker.py",
     ],
     visibility = ["//:__pkg__"],
diff --git a/tools/bazel_integration_test/BUILD b/tools/bazel_integration_test/BUILD.bazel
similarity index 100%
rename from tools/bazel_integration_test/BUILD
rename to tools/bazel_integration_test/BUILD.bazel