| #!/usr/bin/python |
| """Generate Abseil compile compile option configs. |
| |
| Usage: <path_to_absl>/copts/generate_copts.py |
| |
| The configs are generated from copts.py. |
| """ |
| |
| from os import path |
| import sys |
| from copts import COPT_VARS |
| |
| |
| # Helper functions |
| def file_header_lines(): |
| return [ |
| "GENERATED! DO NOT MANUALLY EDIT THIS FILE.", "", |
| "(1) Edit absl/copts/copts.py.", |
| "(2) Run `python <path_to_absl>/copts/generate_copts.py`." |
| ] |
| |
| |
| def flatten(*lists): |
| return [item for sublist in lists for item in sublist] |
| |
| |
| def relative_filename(filename): |
| return path.join(path.dirname(__file__), filename) |
| |
| |
| # Style classes. These contain all the syntactic styling needed to generate a |
| # copt file for different build tools. |
| class CMakeStyle(object): |
| """Style object for CMake copts file.""" |
| |
| def separator(self): |
| return "" |
| |
| def list_introducer(self, name): |
| return "list(APPEND " + name |
| |
| def list_closer(self): |
| return ")\n" |
| |
| def docstring(self): |
| return "\n".join((("# " + line).strip() for line in file_header_lines())) |
| |
| def filename(self): |
| return "GENERATED_AbseilCopts.cmake" |
| |
| |
| class StarlarkStyle(object): |
| """Style object for Starlark copts file.""" |
| |
| def separator(self): |
| return "," |
| |
| def list_introducer(self, name): |
| return name + " = [" |
| |
| def list_closer(self): |
| return "]\n" |
| |
| def docstring(self): |
| docstring_quotes = "\"\"\"" |
| return docstring_quotes + "\n".join( |
| flatten(file_header_lines(), [docstring_quotes])) |
| |
| def filename(self): |
| return "GENERATED_copts.bzl" |
| |
| |
| # Copt file generation |
| def copt_list(name, arg_list, style): |
| make_line = lambda s: " \"" + s + "\"" + style.separator() |
| external_str_list = [make_line(s) for s in arg_list] |
| |
| return "\n".join( |
| flatten( |
| [style.list_introducer(name)], |
| external_str_list, |
| [style.list_closer()])) |
| |
| |
| def generate_copt_file(style): |
| """Creates a generated copt file using the given style object. |
| |
| Args: |
| style: either StarlarkStyle() or CMakeStyle() |
| """ |
| with open(relative_filename(style.filename()), "w") as f: |
| f.write(style.docstring()) |
| f.write("\n") |
| for var_name, arg_list in sorted(COPT_VARS.items()): |
| f.write("\n") |
| f.write(copt_list(var_name, arg_list, style)) |
| |
| |
| def main(argv): |
| if len(argv) > 1: |
| raise RuntimeError("generate_copts needs no command line args") |
| |
| generate_copt_file(StarlarkStyle()) |
| generate_copt_file(CMakeStyle()) |
| |
| |
| if __name__ == "__main__": |
| main(sys.argv) |