mirror of
https://github.com/marzer/tomlplusplus.git
synced 2024-11-02 02:26:28 +00:00
234 lines
8.1 KiB
Python
234 lines
8.1 KiB
Python
#!/usr/bin/env python3
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# This file is a part of toml++ and is subject to the the terms of the MIT license.
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# Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
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# See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
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# SPDX-License-Identifier: MIT
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import sys
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import utils
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import re
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from pathlib import Path
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from io import StringIO
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class Preprocessor:
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__re_includes = re.compile(r'^\s*#\s*include\s+"(.+?)".*?$', re.I | re.M)
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__re_pragma_once = re.compile(r'^\s*#\s*pragma\s+once\s*$', re.M)
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def __init__(self, file):
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self.__once_only = set()
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self.__current_level = 0
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self.__directory_stack = [ Path.cwd() ]
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self.__entry_root = ''
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self.__string = self.__preprocess(file)
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def __preprocess(self, incl):
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if not isinstance(incl, (Path, str)): # a regex match object
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incl = incl.group(1).strip()
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if isinstance(incl, str):
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incl = Path(incl.strip().replace('\\',r'/'))
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if not incl.is_absolute():
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incl = Path(self.__directory_stack[-1], incl).resolve()
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if incl in self.__once_only:
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return ''
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text = utils.read_all_text_from_file(incl, logger=True).strip() + '\n'
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text = text.replace('\r\n', '\n') # convert windows newlines
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self.__directory_stack.append(incl.parent)
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if self.__re_pragma_once.search(text):
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self.__once_only.add(incl)
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if self.__current_level == 0 and self.__entry_root == '':
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self.__entry_root = str(incl.parent).replace('\\',r'/')
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if self.__current_level > 0:
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text = self.__re_pragma_once.sub('', text)
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self.__current_level += 1
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text = self.__re_includes.sub(lambda m : self.__preprocess(m), text, 0)
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self.__current_level -= 1
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if self.__current_level == 1:
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header = str(incl).replace('\\',r'/')
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if header.startswith(self.__entry_root):
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header = header[len(self.__entry_root):].strip('/')
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header = utils.make_divider(header, 10, pattern = r'*')
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text = f'\n\n{header}\n\n{text}'
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self.__directory_stack.pop()
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return '\n\n' + text + '\n\n'
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def __str__(self):
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return self.__string
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def main():
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# establish local directories
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root_dir = utils.entry_script_dir().parent
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include_dir = Path(root_dir, 'include', 'toml++')
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# preprocess header(s)
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toml_h = str(Preprocessor(Path(include_dir, 'toml.h')))
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# strip various things:
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if 1:
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for i in range(3):
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# trailing whitespace
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toml_h = re.sub('([^ \t])[ \t]+\n', r'\1\n', toml_h)
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# explicit 'strip this' blocks
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toml_h = re.sub(r'(?:\n[ \t]*)?//[#!][ \t]*[{][{].*?//[#!][ \t]*[}][}].*?\n', '\n', toml_h, flags=re.S)
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# spdx license identifiers
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toml_h = re.sub(r'^\s*//\s*SPDX-License-Identifier:.+?$', '', toml_h, 0, re.I | re.M)
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# double blank lines
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toml_h = re.sub('\n(?:[ \t]*\n[ \t]*)+\n', '\n\n', toml_h)
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# magic comments
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blank_line = r'(?:[ \t]*\n)'
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comment_line = r'(?:[ \t]*//(?:[/#!<]| ?(?:---|===|\^\^\^|vvv))[^\n]*\n)'
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toml_h = re.sub(rf'\n{comment_line}{blank_line}+{comment_line}', '\n', toml_h)
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toml_h = re.sub(rf'([{{,])\s*\n(?:{comment_line}|{blank_line})+', r'\1\n', toml_h)
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toml_h = re.sub(rf'{comment_line}+', '\n', toml_h)
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# weird spacing edge case between } and pp directives
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toml_h = re.sub('\n[}]\n#', r'\n}\n\n#', toml_h, re.S)
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# enable warnings -> disable warnings
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toml_h = re.sub('(TOML_ENABLE_WARNINGS;)\n[ \t\n]*\n(TOML_DISABLE_WARNINGS;)', r'', toml_h)
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# blank lines between consecutive TOML_XXXXX_WARNINGS statements
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toml_h = re.sub('(TOML_[A-Z_]+?_WARNINGS;)\n[ \t\n]*\n(TOML_[A-Z_]+?_WARNINGS;)', r'\1\n\2', toml_h)
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# blank lines between consecutive #includes
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toml_h = re.sub('[#]\s*include\s*<(.+?)>\n[ \t\n]*\n[#]\s*include\s*<(.+?)>', r'#include <\1>\n#include <\2>', toml_h)
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# blank lines following opening brackets or a comma
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toml_h = re.sub(r'([^@][({,])\n\n', r'\1\n', toml_h)
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# blank lines preceeding closing brackets
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toml_h = re.sub(r'\n\n([ \t]*[})])', r'\n\1', toml_h)
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# ensure only one trailing newline
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toml_h = toml_h.strip() + '\n'
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# change TOML_LIB_SINGLE_HEADER to 1
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toml_h = re.sub(
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'#\s*define\s+TOML_LIB_SINGLE_HEADER\s+[0-9]+',
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'#define TOML_LIB_SINGLE_HEADER 1',
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toml_h, 0, re.I
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)
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# read version number
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version_h = utils.read_all_text_from_file(Path(include_dir, 'impl/version.h'), logger=True)
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match = re.search(
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r'#\s*define\s+TOML_LIB_MAJOR\s+([0-9]+)[^0-9].*'
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+ r'#\s*define\s+TOML_LIB_MINOR\s+([0-9]+)[^0-9].*'
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+ r'#\s*define\s+TOML_LIB_PATCH\s+([0-9]+)[^0-9]',
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version_h, re.I | re.S)
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if match is None:
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raise Exception("could not find TOML_LIB_MAJOR, TOML_LIB_MINOR or TOML_LIB_PATCH impl/version.h")
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version = rf'{int(match[1])}.{int(match[2])}.{int(match[3])}'
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print(rf'Library version: {version}')
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# build the preamble (license etc)
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preamble = []
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preamble.append(rf'''
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// toml++ v{version}
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// https://github.com/marzer/tomlplusplus
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// SPDX-License-Identifier: MIT''')
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preamble.append(r'''
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// - THIS FILE WAS ASSEMBLED FROM MULTIPLE HEADER FILES BY A SCRIPT - PLEASE DON'T EDIT IT DIRECTLY -
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//
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// If you wish to submit a contribution to toml++, hooray and thanks! Before you crack on, please be aware that this
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// file was assembled from a number of smaller files by a python script, and code contributions should not be made
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// against it directly. You should instead make your changes in the relevant source file(s). The file names of the files
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// that contributed to this header can be found at the beginnings and ends of the corresponding sections of this file.''')
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preamble.append(r'''
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// TOML Language Specifications:
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// latest: https://github.com/toml-lang/toml/blob/master/README.md
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// v1.0.0: https://toml.io/en/v1.0.0
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// v0.5.0: https://toml.io/en/v0.5.0
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// changelog: https://github.com/toml-lang/toml/blob/master/CHANGELOG.md''')
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preamble.append(utils.read_all_text_from_file(Path(utils.entry_script_dir(), '..', 'LICENSE').resolve(), logger=True))
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# write the output
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with StringIO(newline='\n') as output:
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# build in a string buffer
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write = lambda txt, end='\n': print(txt, file=output, end=end)
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if (len(preamble) > 0):
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write(utils.make_divider())
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for pre in preamble:
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write('//')
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for line in pre.strip().splitlines():
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if len(line) == 0:
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write('//')
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continue
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if not line.startswith('//'):
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write('// ', end = '')
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write(line)
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write('//')
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write(utils.make_divider())
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write(toml_h)
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write('')
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output_str = output.getvalue().strip()
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# analyze the output to find any potentially missing #undefs
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if 1:
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re_define = re.compile(r'^\s*#\s*define\s+([a-zA-Z0-9_]+)(?:$|\s|\()')
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re_undef = re.compile(r'^\s*#\s*undef\s+([a-zA-Z0-9_]+)(?:$|\s|//)')
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defines = dict()
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for output_line in output_str.splitlines():
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defined = True
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m = re_define.match(output_line)
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if not m:
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defined = False
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m = re_undef.match(output_line)
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if m:
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defines[m.group(1)] = defined
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ignore_list = ( # macros that are meant to stay public (user configs etc)
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r'TOMLPLUSPLUS_H',
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r'INCLUDE_TOMLPLUSPLUS_H',
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r'POXY_IMPLEMENTATION_DETAIL',
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r'TOML_ALL_INLINE',
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r'TOML_API',
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r'TOML_CONFIG_HEADER',
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r'TOML_ENABLE_FORMATTERS',
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r'TOML_ENABLE_PARSER',
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r'TOML_ENABLE_SIMD',
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r'TOML_ENABLE_UNRELEASED_FEATURES',
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r'TOML_ENABLE_WINDOWS_COMPAT',
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r'TOML_EXCEPTIONS',
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r'TOML_EXTERN_TEMPLATES',
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r'TOML_HEADER_ONLY',
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r'TOML_LANG_MAJOR',
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r'TOML_LANG_MINOR',
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r'TOML_LANG_PATCH',
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r'TOML_LIB_MAJOR',
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r'TOML_LIB_MINOR',
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r'TOML_LIB_PATCH',
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r'TOML_LIB_SINGLE_HEADER',
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r'TOML_MAX_NESTED_VALUES',
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r'TOML_OPTIONAL_TYPE',
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r'TOML_SMALL_FLOAT_TYPE',
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r'TOML_SMALL_INT_TYPE',
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r'TOML_UNDEF_MACROS',
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)
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set_defines = []
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for define, currently_set in defines.items():
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if currently_set and define not in ignore_list:
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set_defines.append(define)
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if len(set_defines) > 0:
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set_defines.sort()
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print(f"Potentially missing #undefs:")
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for define in set_defines:
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print(f"\t#undef {define}")
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# write the output file
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output_file_path = Path(utils.entry_script_dir(), '..', 'toml.hpp').resolve()
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print("Writing to {}".format(output_file_path))
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with open(output_file_path,'w', encoding='utf-8', newline='\n') as output_file:
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print(output_str, file=output_file)
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if __name__ == '__main__':
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utils.run(main, verbose=True)
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