| """A simple rule that generates and provides a DefaultOutput with some files""" |
| |
| def _generate_outputs_impl(ctx): |
| if len(ctx.attr.output_files) != len(ctx.attr.output_contents): |
| fail("Number of output_files must match number of output_contents") |
| outputs = [] |
| for i, file in enumerate(ctx.attr.output_files): |
| content = ctx.attr.output_contents[i] |
| out = ctx.actions.declare_file(file) |
| |
| # ctx.actions.write creates a FileWriteAction which uses UTF-8 encoding. |
| ctx.actions.write( |
| output = out, |
| content = content, |
| ) |
| outputs.append(out) |
| |
| provide = [] |
| if ctx.attr.output_group: |
| kwargs = {ctx.attr.output_group: depset(outputs)} |
| provide.append(OutputGroupInfo(**kwargs)) |
| else: |
| provide.append(DefaultInfo(files = depset(outputs))) |
| return provide |
| |
| generate_outputs = rule( |
| implementation = _generate_outputs_impl, |
| provides = [DefaultInfo], |
| attrs = { |
| "output_files": attr.string_list(), |
| "output_contents": attr.string_list(), |
| "output_group": attr.string(), |
| }, |
| ) |
