[bazel] Consolidate skylib loads

For importing into G3, this will simplify the regex needed
and allow us to stub out things not supported (e.g. gazelle)

Change-Id: I770f5dee6f29e555356742dae36212ad6cfb713a
Bug: skia:12541
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/529836
Reviewed-by: Ben Wagner <bungeman@google.com>

BUILD.bazel

@@ -1,9 +1,6 @@
 licenses(["notice"])
 
-# https://github.com/bazelbuild/bazel-skylib
-load("@bazel_skylib//lib:selects.bzl", "selects")
-load("//bazel:macros.bzl", "select_multi")
-load("@bazel_gazelle//:def.bzl", "gazelle")
+load("//bazel:macros.bzl", "gazelle", "select_multi", "selects")
 
 package(default_visibility = ["//:__subpackages__"])
 

bazel/common_config_settings/BUILD.bazel

@@ -2,8 +2,7 @@ licenses(["notice"])
 
 load(":defs.bzl", "bool_flag", "string_flag_with_values")
 
-# https://github.com/bazelbuild/bazel-skylib
-load("@bazel_skylib//lib:selects.bzl", "selects")
+load("//bazel:macros.bzl", "selects")
 
 # @platforms is found at https://github.com/bazelbuild/platforms
 package(default_visibility = ["//:__subpackages__"])

bazel/macros.bzl

@@ -2,6 +2,19 @@
 This file contains general helper macros that make our BUILD.bazel files easier to read.
 """
 
+# https://github.com/bazelbuild/bazel-skylib
+load("@bazel_skylib//lib:selects.bzl", _selects = "selects")
+load("@rules_python//python:defs.bzl", _py_binary = "py_binary")
+load("@py_deps//:requirements.bzl", _requirement = "requirement")
+load("@bazel_gazelle//:def.bzl", _gazelle = "gazelle")
+
+# re-export symbols that are commonly used or that are not supported in G3
+# (and thus we need to stub out)
+selects = _selects
+py_binary = _py_binary
+requirement = _requirement
+gazelle = _gazelle
+
 def select_multi(values_map, default, name = ""):
     """select() but allowing multiple matches of the keys.
 

src/codec/BUILD.bazel

@@ -1,8 +1,6 @@
 licenses(["notice"])
 
-# https://github.com/bazelbuild/bazel-skylib
-load("@bazel_skylib//lib:selects.bzl", "selects")
-load("//bazel:macros.bzl", "generated_cc_atom", "select_multi")
+load("//bazel:macros.bzl", "generated_cc_atom", "select_multi", "selects")
 
 cc_library(
     name = "androidcodec_srcs",

src/gpu/ganesh/BUILD.bazel

@@ -1,8 +1,6 @@
 licenses(["notice"])
 
-# https://github.com/bazelbuild/bazel-skylib
-load("@bazel_skylib//lib:selects.bzl", "selects")
-load("//bazel:macros.bzl", "generated_cc_atom")
+load("//bazel:macros.bzl", "generated_cc_atom", "selects")
 
 cc_library(
     name = "core_srcs",

src/ports/BUILD.bazel

@@ -1,8 +1,6 @@
 licenses(["notice"])
 
-# https://github.com/bazelbuild/bazel-skylib
-load("@bazel_skylib//lib:selects.bzl", "selects")
-load("//bazel:macros.bzl", "generated_cc_atom", "select_multi")
+load("//bazel:macros.bzl", "generated_cc_atom", "select_multi", "selects")
 
 cc_library(
     name = "typeface_freetype",

third_party/BUILD.bazel

@@ -1,9 +1,6 @@
 licenses(["notice"])
 
-# https://github.com/bazelbuild/bazel-skylib
-load("@bazel_skylib//lib:selects.bzl", "selects")
-load("@rules_python//python:defs.bzl", "py_binary")
-load("@py_deps//:requirements.bzl", "requirement")
+load("//bazel:macros.bzl", "py_binary", "requirement", "selects")
 
 cc_library(
     name = "skcms",

tools/BUILD.bazel

@@ -1,7 +1,6 @@
 licenses(["notice"])
 
-load("//bazel:macros.bzl", "generated_cc_atom")
-load("@rules_python//python:defs.bzl", "py_binary")
+load("//bazel:macros.bzl", "generated_cc_atom", "py_binary")
 
 py_binary(
     name = "embed_resources",

tools/sk_app/BUILD.bazel

@@ -1,8 +1,6 @@
 licenses(["notice"])
 
-# https://github.com/bazelbuild/bazel-skylib
-load("@bazel_skylib//lib:selects.bzl", "selects")
-load("//bazel:macros.bzl", "generated_cc_atom")
+load("//bazel:macros.bzl", "generated_cc_atom", "selects")
 
 selects.config_setting_group(
     name = "dawn_unix",