kchodorow · June 17, 2016 14:33
diff --git a/BUILD b/BUILD
 load("//:tester.bzl", "greet")

 greet(
    name = "a-greeting",
    my_name = "kristina",  
 )
diff --git a/Console b/Console
 $ bazel build :a-greeting
 INFO: Found 1 target...
 Target //:a-greeting up-to-date:
  bazel-bin/hi-there-kristina
 INFO: Elapsed time: 0.324s, Critical Path: 0.00s
diff --git a/tester.bzl b/tester.bzl
 def _impl(ctx):
  output = ctx.outputs.greeting
  ctx.file_action(
      output = output,
      content = "")

 greet = rule(
    attrs = {"my_name": attr.string()},
    outputs = {"greeting": "hi-there-%{my_name}"},
    implementation = _impl,
 )
	$ bazel build :a-greeting
	INFO: Found 1 target...
	Target //:a-greeting up-to-date:
	bazel-bin/hi-there-kristina
	INFO: Elapsed time: 0.324s, Critical Path: 0.00s
	def _impl(ctx):
	output = ctx.outputs.greeting
	ctx.file_action(
	output = output,
	content = "")

	greet = rule(
	attrs = {"my_name": attr.string()},
	outputs = {"greeting": "hi-there-%{my_name}"},
	implementation = _impl,
	)