Initial commit

vendor/github.com/bazelbuild/buildtools/build/build_defs.bzl

@@ -0,0 +1,52 @@
+"""Provides go_yacc and genfile_check_test
+
+Copyright 2016 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+"""
+
+_GO_YACC_TOOL = "@org_golang_x_tools//cmd/goyacc"
+
+def go_yacc(src, out, visibility=None):
+  """Runs go tool yacc -o $out $src."""
+  native.genrule(
+      name = src + ".go_yacc",
+      srcs = [src],
+      outs = [out],
+      tools = [_GO_YACC_TOOL],
+      cmd = ("export GOROOT=$$(dirname $(location " + _GO_YACC_TOOL + "))/..;" +
+             " $(location " + _GO_YACC_TOOL + ") " +
+             " -o $(location " + out + ") $(SRCS)"),
+      visibility = visibility,
+      local = 1,
+  )
+
+def genfile_check_test(src, gen):
+  """Asserts that any checked-in generated code matches regen."""
+  if not src:
+    fail("src is required", "src")
+  if not gen:
+    fail("gen is required", "gen")
+  native.genrule(
+      name = src + "_checksh",
+      outs = [src + "_check.sh"],
+      cmd = "echo 'diff $$@' > $@",
+  )
+  native.sh_test(
+      name = src + "_checkshtest",
+      size = "small",
+      srcs = [src + "_check.sh"],
+      data = [src, gen],
+      args = ["$(location " + src + ")", "$(location " + gen + ")"],
+  )
+