380 lines
12 KiB
Python
Executable File
380 lines
12 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Syntax: mkdoc.py [-I<path> ..] [.. a list of header files ..]
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#
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# Extract documentation from C++ header files to use it in Python bindings
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#
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import os
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import sys
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import platform
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import re
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import textwrap
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from clang import cindex
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from clang.cindex import CursorKind
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from collections import OrderedDict
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from glob import glob
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from threading import Thread, Semaphore
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from multiprocessing import cpu_count
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RECURSE_LIST = [
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CursorKind.TRANSLATION_UNIT,
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CursorKind.NAMESPACE,
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CursorKind.CLASS_DECL,
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CursorKind.STRUCT_DECL,
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CursorKind.ENUM_DECL,
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CursorKind.CLASS_TEMPLATE
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]
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PRINT_LIST = [
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CursorKind.CLASS_DECL,
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CursorKind.STRUCT_DECL,
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CursorKind.ENUM_DECL,
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CursorKind.ENUM_CONSTANT_DECL,
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CursorKind.CLASS_TEMPLATE,
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CursorKind.FUNCTION_DECL,
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CursorKind.FUNCTION_TEMPLATE,
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CursorKind.CONVERSION_FUNCTION,
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CursorKind.CXX_METHOD,
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CursorKind.CONSTRUCTOR,
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CursorKind.FIELD_DECL
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]
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PREFIX_BLACKLIST = [
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CursorKind.TRANSLATION_UNIT
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]
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CPP_OPERATORS = {
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'<=': 'le', '>=': 'ge', '==': 'eq', '!=': 'ne', '[]': 'array',
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'+=': 'iadd', '-=': 'isub', '*=': 'imul', '/=': 'idiv', '%=':
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'imod', '&=': 'iand', '|=': 'ior', '^=': 'ixor', '<<=': 'ilshift',
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'>>=': 'irshift', '++': 'inc', '--': 'dec', '<<': 'lshift', '>>':
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'rshift', '&&': 'land', '||': 'lor', '!': 'lnot', '~': 'bnot',
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'&': 'band', '|': 'bor', '+': 'add', '-': 'sub', '*': 'mul', '/':
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'div', '%': 'mod', '<': 'lt', '>': 'gt', '=': 'assign', '()': 'call'
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}
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CPP_OPERATORS = OrderedDict(
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sorted(CPP_OPERATORS.items(), key=lambda t: -len(t[0])))
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job_count = cpu_count()
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job_semaphore = Semaphore(job_count)
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class NoFilenamesError(ValueError):
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pass
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def d(s):
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return s if isinstance(s, str) else s.decode('utf8')
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def sanitize_name(name):
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name = re.sub(r'type-parameter-0-([0-9]+)', r'T\1', name)
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for k, v in CPP_OPERATORS.items():
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name = name.replace('operator%s' % k, 'operator_%s' % v)
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name = re.sub('<.*>', '', name)
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name = ''.join([ch if ch.isalnum() else '_' for ch in name])
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name = re.sub('_$', '', re.sub('_+', '_', name))
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return '__doc_' + name
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def process_comment(comment):
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result = ''
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# Remove C++ comment syntax
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leading_spaces = float('inf')
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for s in comment.expandtabs(tabsize=4).splitlines():
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s = s.strip()
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if s.startswith('/*'):
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s = s[2:].lstrip('*')
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elif s.endswith('*/'):
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s = s[:-2].rstrip('*')
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elif s.startswith('///'):
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s = s[3:]
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if s.startswith('*'):
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s = s[1:]
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if len(s) > 0:
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leading_spaces = min(leading_spaces, len(s) - len(s.lstrip()))
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result += s + '\n'
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if leading_spaces != float('inf'):
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result2 = ""
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for s in result.splitlines():
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result2 += s[leading_spaces:] + '\n'
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result = result2
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# Doxygen tags
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cpp_group = '([\w:]+)'
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param_group = '([\[\w:\]]+)'
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s = result
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s = re.sub(r'\\c\s+%s' % cpp_group, r'``\1``', s)
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s = re.sub(r'\\a\s+%s' % cpp_group, r'*\1*', s)
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s = re.sub(r'\\e\s+%s' % cpp_group, r'*\1*', s)
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s = re.sub(r'\\em\s+%s' % cpp_group, r'*\1*', s)
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s = re.sub(r'\\b\s+%s' % cpp_group, r'**\1**', s)
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s = re.sub(r'\\ingroup\s+%s' % cpp_group, r'', s)
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s = re.sub(r'\\param%s?\s+%s' % (param_group, cpp_group),
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r'\n\n$Parameter ``\2``:\n\n', s)
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s = re.sub(r'\\tparam%s?\s+%s' % (param_group, cpp_group),
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r'\n\n$Template parameter ``\2``:\n\n', s)
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for in_, out_ in {
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'return': 'Returns',
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'author': 'Author',
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'authors': 'Authors',
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'copyright': 'Copyright',
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'date': 'Date',
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'remark': 'Remark',
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'sa': 'See also',
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'see': 'See also',
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'extends': 'Extends',
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'throw': 'Throws',
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'throws': 'Throws'
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}.items():
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s = re.sub(r'\\%s\s*' % in_, r'\n\n$%s:\n\n' % out_, s)
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s = re.sub(r'\\details\s*', r'\n\n', s)
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s = re.sub(r'\\brief\s*', r'', s)
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s = re.sub(r'\\short\s*', r'', s)
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s = re.sub(r'\\ref\s*', r'', s)
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s = re.sub(r'\\code\s?(.*?)\s?\\endcode',
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r"```\n\1\n```\n", s, flags=re.DOTALL)
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# HTML/TeX tags
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s = re.sub(r'<tt>(.*?)</tt>', r'``\1``', s, flags=re.DOTALL)
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s = re.sub(r'<pre>(.*?)</pre>', r"```\n\1\n```\n", s, flags=re.DOTALL)
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s = re.sub(r'<em>(.*?)</em>', r'*\1*', s, flags=re.DOTALL)
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s = re.sub(r'<b>(.*?)</b>', r'**\1**', s, flags=re.DOTALL)
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s = re.sub(r'\\f\$(.*?)\\f\$', r'$\1$', s, flags=re.DOTALL)
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s = re.sub(r'<li>', r'\n\n* ', s)
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s = re.sub(r'</?ul>', r'', s)
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s = re.sub(r'</li>', r'\n\n', s)
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s = s.replace('``true``', '``True``')
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s = s.replace('``false``', '``False``')
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# Re-flow text
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wrapper = textwrap.TextWrapper()
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wrapper.expand_tabs = True
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wrapper.replace_whitespace = True
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wrapper.drop_whitespace = True
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wrapper.width = 70
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wrapper.initial_indent = wrapper.subsequent_indent = ''
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result = ''
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in_code_segment = False
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for x in re.split(r'(```)', s):
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if x == '```':
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if not in_code_segment:
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result += '```\n'
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else:
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result += '\n```\n\n'
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in_code_segment = not in_code_segment
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elif in_code_segment:
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result += x.strip()
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else:
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for y in re.split(r'(?: *\n *){2,}', x):
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wrapped = wrapper.fill(re.sub(r'\s+', ' ', y).strip())
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if len(wrapped) > 0 and wrapped[0] == '$':
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result += wrapped[1:] + '\n'
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wrapper.initial_indent = \
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wrapper.subsequent_indent = ' ' * 4
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else:
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if len(wrapped) > 0:
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result += wrapped + '\n\n'
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wrapper.initial_indent = wrapper.subsequent_indent = ''
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return result.rstrip().lstrip('\n')
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def extract(filename, node, prefix, output):
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if not (node.location.file is None or
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os.path.samefile(d(node.location.file.name), filename)):
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return 0
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if node.kind in RECURSE_LIST:
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sub_prefix = prefix
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if node.kind not in PREFIX_BLACKLIST:
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if len(sub_prefix) > 0:
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sub_prefix += '_'
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sub_prefix += d(node.spelling)
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for i in node.get_children():
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extract(filename, i, sub_prefix, output)
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if node.kind in PRINT_LIST:
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comment = d(node.raw_comment) if node.raw_comment is not None else ''
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comment = process_comment(comment)
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sub_prefix = prefix
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if len(sub_prefix) > 0:
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sub_prefix += '_'
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if len(node.spelling) > 0:
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name = sanitize_name(sub_prefix + d(node.spelling))
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output.append((name, filename, comment))
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class ExtractionThread(Thread):
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def __init__(self, filename, parameters, output):
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Thread.__init__(self)
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self.filename = filename
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self.parameters = parameters
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self.output = output
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job_semaphore.acquire()
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def run(self):
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print('Processing "%s" ..' % self.filename, file=sys.stderr)
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try:
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index = cindex.Index(
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cindex.conf.lib.clang_createIndex(False, True))
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tu = index.parse(self.filename, self.parameters)
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extract(self.filename, tu.cursor, '', self.output)
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finally:
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job_semaphore.release()
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def read_args(args):
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parameters = []
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filenames = []
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if "-x" not in args:
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parameters.extend(['-x', 'c++'])
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if not any(it.startswith("-std=") for it in args):
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parameters.append('-std=c++11')
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if platform.system() == 'Darwin':
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dev_path = '/Applications/Xcode.app/Contents/Developer/'
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lib_dir = dev_path + 'Toolchains/XcodeDefault.xctoolchain/usr/lib/'
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sdk_dir = dev_path + 'Platforms/MacOSX.platform/Developer/SDKs'
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libclang = lib_dir + 'libclang.dylib'
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if os.path.exists(libclang):
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cindex.Config.set_library_path(os.path.dirname(libclang))
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if os.path.exists(sdk_dir):
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sysroot_dir = os.path.join(sdk_dir, next(os.walk(sdk_dir))[1][0])
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parameters.append('-isysroot')
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parameters.append(sysroot_dir)
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elif platform.system() == 'Linux':
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# clang doesn't find its own base includes by default on Linux,
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# but different distros install them in different paths.
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# Try to autodetect, preferring the highest numbered version.
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def clang_folder_version(d):
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return [int(ver) for ver in re.findall(r'(?<!lib)(?<!\d)\d+', d)]
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clang_include_dir = max((
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path
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for libdir in ['lib64', 'lib', 'lib32']
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for path in glob('/usr/%s/clang/*/include' % libdir)
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if os.path.isdir(path)
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), default=None, key=clang_folder_version)
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if clang_include_dir:
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parameters.extend(['-isystem', clang_include_dir])
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for item in args:
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if item.startswith('-'):
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parameters.append(item)
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else:
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filenames.append(item)
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if len(filenames) == 0:
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raise NoFilenamesError("args parameter did not contain any filenames")
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return parameters, filenames
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def extract_all(args):
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parameters, filenames = read_args(args)
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output = []
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for filename in filenames:
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thr = ExtractionThread(filename, parameters, output)
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thr.start()
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print('Waiting for jobs to finish ..', file=sys.stderr)
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for i in range(job_count):
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job_semaphore.acquire()
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return output
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def write_header(comments, out_file=sys.stdout):
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print('''/*
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This file contains docstrings for the Python bindings.
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Do not edit! These were automatically extracted by mkdoc.py
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*/
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#define __EXPAND(x) x
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#define __COUNT(_1, _2, _3, _4, _5, _6, _7, COUNT, ...) COUNT
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#define __VA_SIZE(...) __EXPAND(__COUNT(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1))
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#define __CAT1(a, b) a ## b
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#define __CAT2(a, b) __CAT1(a, b)
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#define __DOC1(n1) __doc_##n1
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#define __DOC2(n1, n2) __doc_##n1##_##n2
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#define __DOC3(n1, n2, n3) __doc_##n1##_##n2##_##n3
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#define __DOC4(n1, n2, n3, n4) __doc_##n1##_##n2##_##n3##_##n4
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#define __DOC5(n1, n2, n3, n4, n5) __doc_##n1##_##n2##_##n3##_##n4##_##n5
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#define __DOC6(n1, n2, n3, n4, n5, n6) __doc_##n1##_##n2##_##n3##_##n4##_##n5##_##n6
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#define __DOC7(n1, n2, n3, n4, n5, n6, n7) __doc_##n1##_##n2##_##n3##_##n4##_##n5##_##n6##_##n7
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#define DOC(...) __EXPAND(__EXPAND(__CAT2(__DOC, __VA_SIZE(__VA_ARGS__)))(__VA_ARGS__))
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#if defined(__GNUG__)
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-variable"
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#endif
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''', file=out_file)
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name_ctr = 1
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name_prev = None
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for name, _, comment in list(sorted(comments, key=lambda x: (x[0], x[1]))):
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if name == name_prev:
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name_ctr += 1
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name = name + "_%i" % name_ctr
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else:
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name_prev = name
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name_ctr = 1
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print('\nstatic const char *%s =%sR"doc(%s)doc";' %
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(name, '\n' if '\n' in comment else ' ', comment), file=out_file)
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print('''
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#if defined(__GNUG__)
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#pragma GCC diagnostic pop
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#endif
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''', file=out_file)
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def mkdoc(args):
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args = list(args)
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out_path = None
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for idx, arg in enumerate(args):
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if arg.startswith("-o"):
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args.remove(arg)
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try:
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out_path = arg[2:] or args.pop(idx)
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except IndexError:
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print("-o flag requires an argument")
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exit(-1)
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break
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comments = extract_all(args)
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if out_path:
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try:
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with open(out_path, 'w') as out_file:
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write_header(comments, out_file)
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except:
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# In the event of an error, don't leave a partially-written
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# output file.
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try:
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os.unlink(out_path)
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except:
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pass
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raise
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else:
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write_header(comments)
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if __name__ == '__main__':
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try:
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mkdoc(sys.argv[1:])
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except NoFilenamesError:
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print('Syntax: %s [.. a list of header files ..]' % sys.argv[0])
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exit(-1)
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