tree b08ca5bfb8d59073d0df7b5b16c054126b32cbfa
parent 1da2620bbfff9bfd742f0bd8b26fc53351e03361
author tanzhengwei <tanzhengwei@google.com> 1758650494 -0700
committer Copybara-Service <copybara-worker@google.com> 1758650568 -0700

Implement `ctx.actions.map_directory` API for Starlark action templates using a new context object `template_ctx`.

**Example:**
```
def _template_impl(
		template_ctx,
		input_directories,
		output_directories,
		additional_inputs,
		tools,
		additional_kwargs):
	in_dir = input_directories["in_dir"]
	out_dir = output_directories["out_dir"]
	data = additional_inputs["data"]
	for file in in_dir.children:
		output_file = template_ctx.declare_file(file.basename + ".out", direcetory = out_dir)
		args = template_ctx.args()
		args.add("--file", file)
		args.add("--data", data)
		args.add("--output", output_file)
		template_ctx.run(
			inputs = [file, data],
			outputs = [output_file],
			executable = tools["some_tool"],
			arguments = [args],
		)

def _rule_impl(ctx):
	...
	ctx.actions.map_directory(
		implementation = _template_impl,
		input_directories = {
			"in_dir": in_dir,
		},
		output_directories = {
			"out_dir": out_dir
		},
		additional_inputs = {
			"data": ctx.attr.data,
		},
		tools = {
			"some_tool": ctx.file.some_tool,
		},
		additional_kwargs = {
			"append_data": True,
		},
	)
```

PiperOrigin-RevId: 810504070
Change-Id: I1a8c8d4584d133528144d7b5fba6de1ce61c2e68