110 lines
2.5 KiB
Python
110 lines
2.5 KiB
Python
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#!/usr/bin/env python3
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"""Generate Abseil compile compile option configs.
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Usage: <path_to_absl>/copts/generate_copts.py
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The configs are generated from copts.py.
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"""
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from os import path
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import sys
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from copts import COPT_VARS
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# Helper functions
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def file_header_lines():
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return [
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"GENERATED! DO NOT MANUALLY EDIT THIS FILE.", "",
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"(1) Edit absl/copts/copts.py.",
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"(2) Run `python <path_to_absl>/copts/generate_copts.py`."
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]
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def flatten(*lists):
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return [item for sublist in lists for item in sublist]
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def relative_filename(filename):
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return path.join(path.dirname(__file__), filename)
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# Style classes. These contain all the syntactic styling needed to generate a
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# copt file for different build tools.
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class CMakeStyle(object):
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"""Style object for CMake copts file."""
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def separator(self):
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return ""
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def list_introducer(self, name):
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return "list(APPEND " + name
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def list_closer(self):
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return ")\n"
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def docstring(self):
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return "\n".join((("# " + line).strip() for line in file_header_lines()))
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def filename(self):
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return "GENERATED_AbseilCopts.cmake"
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class StarlarkStyle(object):
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"""Style object for Starlark copts file."""
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def separator(self):
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return ","
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def list_introducer(self, name):
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return name + " = ["
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def list_closer(self):
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return "]\n"
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def docstring(self):
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docstring_quotes = "\"\"\""
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return docstring_quotes + "\n".join(
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flatten(file_header_lines(), [docstring_quotes]))
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def filename(self):
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return "GENERATED_copts.bzl"
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def copt_list(name, arg_list, style):
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"""Copt file generation."""
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make_line = lambda s: " \"" + s + "\"" + style.separator()
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external_str_list = [make_line(s) for s in arg_list]
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return "\n".join(
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flatten(
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[style.list_introducer(name)],
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external_str_list,
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[style.list_closer()]))
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def generate_copt_file(style):
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"""Creates a generated copt file using the given style object.
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Args:
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style: either StarlarkStyle() or CMakeStyle()
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"""
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with open(relative_filename(style.filename()), "w") as f:
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f.write(style.docstring())
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f.write("\n")
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for var_name, arg_list in sorted(COPT_VARS.items()):
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f.write("\n")
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f.write(copt_list(var_name, arg_list, style))
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def main(argv):
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if len(argv) > 1:
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raise RuntimeError("generate_copts needs no command line args")
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generate_copt_file(StarlarkStyle())
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generate_copt_file(CMakeStyle())
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if __name__ == "__main__":
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main(sys.argv)
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