Enable buildifier presubmit check (#245)

This migrates the repo to satisfy buildifier and adds buildifier as a presubmit.

Author: Marcel Hlopko

.bazelci/presubmit.yml

@@ -4,6 +4,9 @@
 # TODO(#144): When Bazel 0.29 is released, the docgen workflow will work, and
 # we can go back to using `...` for build_targets.
 ---
+buildifier:
+  version: latest
+  warnings: "all"
 all_targets: &all_targets
     build_targets:
     - "//examples/..."

BUILD

@@ -15,7 +15,10 @@ package(default_visibility = ["//visibility:public"])
 
 licenses(["notice"])  # Apache 2.0
 
-exports_files(["LICENSE", "version.bzl"])
+exports_files([
+    "LICENSE",
+    "version.bzl",
+])
 
 filegroup(
     name = "distribution",

WORKSPACE

@@ -22,21 +22,25 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
     name = "bazel_federation",
-    url = "https://github.com/bazelbuild/bazel-federation/releases/download/0.0.1/bazel_federation-0.0.1.tar.gz",
     sha256 = "506dfbfd74ade486ac077113f48d16835fdf6e343e1d4741552b450cfc2efb53",
+    url = "https://github.com/bazelbuild/bazel-federation/releases/download/0.0.1/bazel_federation-0.0.1.tar.gz",
 )
 
 load("@bazel_federation//:repositories.bzl", "rules_python_deps")
+
 rules_python_deps()
 
-load("@bazel_federation//setup:rules_python.bzl",  "rules_python_setup")
-rules_python_setup(use_pip=True)
+load("@bazel_federation//setup:rules_python.bzl", "rules_python_setup")
+
+rules_python_setup(use_pip = True)
 
 # Everything below this line is used only for developing rules_python. Users
 # should not copy it to their WORKSPACE.
 
 load("//:internal_deps.bzl", "rules_python_internal_deps")
+
 rules_python_internal_deps()
 
 load("//:internal_setup.bzl", "rules_python_internal_setup")
+
 rules_python_internal_setup()

distro/BUILD

@@ -2,9 +2,9 @@ package(
     default_visibility = ["//visibility:private"],
 )
 
-load("@rules_python//:version.bzl", "version")
 load("@rules_pkg//:pkg.bzl", "pkg_tar")
 load("@rules_pkg//releasing:defs.bzl", "print_rel_notes")
+load("@rules_python//:version.bzl", "version")
 
 # Build the artifact to put on the github release page.
 pkg_tar(

docs/BUILD

@@ -31,10 +31,10 @@ load("@io_bazel_skydoc//stardoc:stardoc.bzl", "stardoc")
 bzl_library(
     name = "bazel_python_tools",
     srcs = [
+        "@bazel_tools//tools/python:private/defs.bzl",
         "@bazel_tools//tools/python:srcs_version.bzl",
         "@bazel_tools//tools/python:toolchain.bzl",
         "@bazel_tools//tools/python:utils.bzl",
-        "@bazel_tools//tools/python:private/defs.bzl",
     ],
 )
 
@@ -49,8 +49,8 @@ bzl_library(
 
 stardoc(
     name = "core-docs",
-    input = "//python:defs.bzl",
     out = "python.md",
+    input = "//python:defs.bzl",
     deps = [":defs"],
 )
 
@@ -60,12 +60,12 @@ stardoc(
 
 stardoc(
     name = "pip-docs",
-    input = "//python:pip.bzl",
     out = "pip.md",
+    input = "//python:pip.bzl",
 )
 
 stardoc(
     name = "whl-docs",
-    input = "//python:whl.bzl",
     out = "whl.md",
+    input = "//python:whl.bzl",
 )

examples/extras/BUILD

@@ -21,10 +21,10 @@ load("//python:defs.bzl", "py_test")
 py_test(
     name = "extras_test",
     srcs = ["extras_test.py"],
+    python_version = "PY2",
     deps = [
         requirement("google-cloud-language"),
         # Make sure that we can resolve the "extra" dependency
         requirement("googleapis-common-protos[grpc]"),
     ],
-    python_version = "PY2",
 )

examples/helloworld/BUILD

@@ -27,6 +27,6 @@ py_library(
 py_test(
     name = "helloworld_test",
     srcs = ["helloworld_test.py"],
-    deps = [":helloworld"],
     python_version = "PY2",
+    deps = [":helloworld"],
 )

experimental/examples/wheel/BUILD

@@ -15,8 +15,8 @@ package(default_visibility = ["//visibility:public"])
 
 licenses(["notice"])  # Apache 2.0
 
-load("//python:defs.bzl", "py_library", "py_test")
 load("//experimental/python:wheel.bzl", "py_package", "py_wheel")
+load("//python:defs.bzl", "py_library", "py_test")
 
 py_library(
     name = "main",
@@ -91,54 +91,54 @@ py_wheel(
     # Package data. We're building "custom_package_root-0.0.1-py3-none-any.whl"
     distribution = "example_custom_package_root",
     python_tag = "py3",
+    strip_path_prefixes = [
+        "experimental",
+    ],
     version = "0.0.1",
     deps = [
-        ":example_pkg"
+        ":example_pkg",
     ],
-    strip_path_prefixes = [
-        "experimental"
-    ]
 )
 
 py_wheel(
     name = "custom_package_root_multi_prefix",
     # Package data. We're building "custom_custom_package_root_multi_prefix-0.0.1-py3-none-any.whl"
     distribution = "example_custom_package_root_multi_prefix",
     python_tag = "py3",
+    strip_path_prefixes = [
+        "experimental/examples/wheel/lib",
+        "experimental/examples/wheel",
+    ],
     version = "0.0.1",
     deps = [
-        ":example_pkg"
+        ":example_pkg",
     ],
-    strip_path_prefixes = [
-        "experimental/examples/wheel/lib",
-        "experimental/examples/wheel"
-    ]
 )
 
 py_wheel(
     name = "custom_package_root_multi_prefix_reverse_order",
     # Package data. We're building "custom_custom_package_root_multi_prefix_reverse_order-0.0.1-py3-none-any.whl"
     distribution = "example_custom_package_root_multi_prefix_reverse_order",
     python_tag = "py3",
+    strip_path_prefixes = [
+        "experimental/examples/wheel",
+        "experimental/examples/wheel/lib",  # this is not effective, because the first prefix takes priority
+    ],
     version = "0.0.1",
     deps = [
-        ":example_pkg"
+        ":example_pkg",
     ],
-    strip_path_prefixes = [
-        "experimental/examples/wheel" ,
-        "experimental/examples/wheel/lib" # this is not effective, because the first prefix takes priority
-    ]
 )
 
 py_test(
     name = "wheel_test",
     srcs = ["wheel_test.py"],
     data = [
+        ":custom_package_root",
+        ":custom_package_root_multi_prefix",
+        ":custom_package_root_multi_prefix_reverse_order",
         ":customized",
         ":minimal_with_py_library",
         ":minimal_with_py_package",
-        ":custom_package_root",
-        ":custom_package_root_multi_prefix",
-        ":custom_package_root_multi_prefix_reverse_order"
-    ]
+    ],
 )