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79 lines
2.0 KiB
Python
Executable File
79 lines
2.0 KiB
Python
Executable File
#!/usr/bin/env python3
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# A tool to parse the output of `clang-format --help` and update the
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# documentation in ../ClangFormat.rst automatically.
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import argparse
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import os
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import re
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import subprocess
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import sys
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PARENT_DIR = os.path.join(os.path.dirname(__file__), "..")
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DOC_FILE = os.path.join(PARENT_DIR, "ClangFormat.rst")
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def substitute(text, tag, contents):
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replacement = "\n.. START_%s\n\n%s\n\n.. END_%s\n" % (tag, contents, tag)
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pattern = r"\n\.\. START_%s\n.*\n\.\. END_%s\n" % (tag, tag)
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return re.sub(pattern, replacement, text, flags=re.S)
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def indent(text, columns, indent_first_line=True):
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indent_str = " " * columns
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s = re.sub(r"\n([^\n])", "\n" + indent_str + "\\1", text, flags=re.S)
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if not indent_first_line or s.startswith("\n"):
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return s
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return indent_str + s
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def get_help_output():
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args = [binary, "--help"]
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cmd = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
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out, _ = cmd.communicate()
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out = out.decode(sys.stdout.encoding)
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return out
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def get_help_text():
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out = get_help_output()
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out = re.sub(r" clang-format\.exe ", " clang-format ", out)
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out = (
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""".. code-block:: console
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$ clang-format --help
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"""
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+ out
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)
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out = indent(out, 2, indent_first_line=False)
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return out
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def validate(text, columns):
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for line in text.splitlines():
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if len(line) > columns:
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print("warning: line too long:\n", line, file=sys.stderr)
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p = argparse.ArgumentParser()
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p.add_argument("-d", "--directory", help="directory of clang-format")
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p.add_argument("-o", "--output", help="path of output file")
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opts = p.parse_args()
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binary = "clang-format"
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if opts.directory:
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binary = opts.directory + "/" + binary
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help_text = get_help_text()
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validate(help_text, 100)
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with open(DOC_FILE, encoding="utf-8") as f:
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contents = f.read()
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contents = substitute(contents, "FORMAT_HELP", help_text)
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with open(
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opts.output if opts.output else DOC_FILE, "w", newline="", encoding="utf-8"
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) as f:
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f.write(contents)
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