300 lines
11 KiB
Python
300 lines
11 KiB
Python
#!/usr/bin/env python3
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# coding=utf-8
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# amalgamate.py - Amalgamate C source and header files.
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# Copyright (c) 2012, Erik Edlund <erik.edlund@32767.se>
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# * Neither the name of Erik Edlund, nor the names of its contributors may
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# be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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from __future__ import division
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from __future__ import print_function
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from __future__ import unicode_literals
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import argparse
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import datetime
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import json
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import os
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import re
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class Amalgamation(object):
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# Prepends self.source_path to file_path if needed.
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def actual_path(self, file_path):
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if not os.path.isabs(file_path):
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file_path = os.path.join(self.source_path, file_path)
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return file_path
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# Search included file_path in self.include_paths and
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# in source_dir if specified.
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def find_included_file(self, file_path, source_dir):
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search_dirs = self.include_paths[:]
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if source_dir:
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search_dirs.insert(0, source_dir)
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for search_dir in search_dirs:
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search_path = os.path.join(search_dir, file_path)
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if os.path.isfile(self.actual_path(search_path)):
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return search_path
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return None
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def __init__(self, args):
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with open(args.config, 'r') as f:
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config = json.loads(f.read())
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for key in config:
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setattr(self, key, config[key])
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self.verbose = args.verbose == "yes"
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self.prologue = args.prologue
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self.source_path = args.source_path
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self.included_files = []
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# Generate the amalgamation and write it to the target file.
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def generate(self):
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amalgamation = ""
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if self.prologue:
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with open(self.prologue, 'r') as f:
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amalgamation += datetime.datetime.now().strftime(f.read())
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if self.verbose:
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print("Config:")
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print(" target = {0}".format(self.target))
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print(" working_dir = {0}".format(os.getcwd()))
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print(" include_paths = {0}".format(self.include_paths))
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print("Creating amalgamation:")
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for file_path in self.sources:
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# Do not check the include paths while processing the source
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# list, all given source paths must be correct.
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# actual_path = self.actual_path(file_path)
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print(" - processing \"{0}\"".format(file_path))
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t = TranslationUnit(file_path, self, True)
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amalgamation += t.content
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with open(self.target, 'w') as f:
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f.write(amalgamation)
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print("...done!\n")
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if self.verbose:
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print("Files processed: {0}".format(self.sources))
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print("Files included: {0}".format(self.included_files))
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print("")
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def _is_within(match, matches):
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for m in matches:
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if match.start() > m.start() and \
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match.end() < m.end():
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return True
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return False
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class TranslationUnit(object):
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# // C++ comment.
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cpp_comment_pattern = re.compile(r"//.*?\n")
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# /* C comment. */
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c_comment_pattern = re.compile(r"/\*.*?\*/", re.S)
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# "complex \"stri\\\ng\" value".
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string_pattern = re.compile("[^']" r'".*?(?<=[^\\])"', re.S)
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# Handle simple include directives. Support for advanced
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# directives where macros and defines needs to expanded is
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# not a concern right now.
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include_pattern = re.compile(
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r'#\s*include\s+(<|")(?P<path>.*?)("|>)', re.S)
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# #pragma once
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pragma_once_pattern = re.compile(r'#\s*pragma\s+once', re.S)
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# Search for pattern in self.content, add the match to
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# contexts if found and update the index accordingly.
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def _search_content(self, index, pattern, contexts):
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match = pattern.search(self.content, index)
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if match:
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contexts.append(match)
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return match.end()
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return index + 2
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# Return all the skippable contexts, i.e., comments and strings
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def _find_skippable_contexts(self):
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# Find contexts in the content in which a found include
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# directive should not be processed.
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skippable_contexts = []
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# Walk through the content char by char, and try to grab
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# skippable contexts using regular expressions when found.
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i = 1
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content_len = len(self.content)
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while i < content_len:
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j = i - 1
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current = self.content[i]
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previous = self.content[j]
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if current == '"':
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# String value.
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i = self._search_content(j, self.string_pattern,
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skippable_contexts)
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elif current == '*' and previous == '/':
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# C style comment.
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i = self._search_content(j, self.c_comment_pattern,
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skippable_contexts)
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elif current == '/' and previous == '/':
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# C++ style comment.
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i = self._search_content(j, self.cpp_comment_pattern,
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skippable_contexts)
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else:
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# Skip to the next char.
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i += 1
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return skippable_contexts
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# Returns True if the match is within list of other matches
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# Removes pragma once from content
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def _process_pragma_once(self):
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content_len = len(self.content)
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if content_len < len("#include <x>"):
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return 0
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# Find contexts in the content in which a found include
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# directive should not be processed.
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skippable_contexts = self._find_skippable_contexts()
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pragmas = []
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pragma_once_match = self.pragma_once_pattern.search(self.content)
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while pragma_once_match:
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if not _is_within(pragma_once_match, skippable_contexts):
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pragmas.append(pragma_once_match)
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pragma_once_match = self.pragma_once_pattern.search(self.content,
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pragma_once_match.end())
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# Handle all collected pragma once directives.
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prev_end = 0
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tmp_content = ''
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for pragma_match in pragmas:
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tmp_content += self.content[prev_end:pragma_match.start()]
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prev_end = pragma_match.end()
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tmp_content += self.content[prev_end:]
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self.content = tmp_content
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# Include all trivial #include directives into self.content.
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def _process_includes(self):
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content_len = len(self.content)
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if content_len < len("#include <x>"):
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return 0
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# Find contexts in the content in which a found include
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# directive should not be processed.
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skippable_contexts = self._find_skippable_contexts()
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# Search for include directives in the content, collect those
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# which should be included into the content.
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includes = []
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include_match = self.include_pattern.search(self.content)
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while include_match:
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if not _is_within(include_match, skippable_contexts):
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include_path = include_match.group("path")
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search_same_dir = include_match.group(1) == '"'
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found_included_path = self.amalgamation.find_included_file(
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include_path, self.file_dir if search_same_dir else None)
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if found_included_path:
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includes.append((include_match, found_included_path))
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include_match = self.include_pattern.search(self.content,
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include_match.end())
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# Handle all collected include directives.
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prev_end = 0
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tmp_content = ''
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for include in includes:
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include_match, found_included_path = include
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tmp_content += self.content[prev_end:include_match.start()]
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tmp_content += "// {0}\n".format(include_match.group(0))
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if found_included_path not in self.amalgamation.included_files:
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t = TranslationUnit(found_included_path, self.amalgamation, False)
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tmp_content += t.content
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prev_end = include_match.end()
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tmp_content += self.content[prev_end:]
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self.content = tmp_content
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return len(includes)
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# Make all content processing
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def _process(self):
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if not self.is_root:
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self._process_pragma_once()
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self._process_includes()
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def __init__(self, file_path, amalgamation, is_root):
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self.file_path = file_path
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self.file_dir = os.path.dirname(file_path)
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self.amalgamation = amalgamation
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self.is_root = is_root
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self.amalgamation.included_files.append(self.file_path)
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actual_path = self.amalgamation.actual_path(file_path)
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if not os.path.isfile(actual_path):
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raise IOError("File not found: \"{0}\"".format(file_path))
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with open(actual_path, 'r') as f:
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self.content = f.read()
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self._process()
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def main():
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description = "Amalgamate C source and header files."
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usage = " ".join([
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"amalgamate.py",
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"[-v]",
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"-c path/to/config.json",
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"-s path/to/source/dir",
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"[-p path/to/prologue.(c|h)]"
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])
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argsparser = argparse.ArgumentParser(
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description=description, usage=usage)
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argsparser.add_argument("-v", "--verbose", dest="verbose",
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choices=["yes", "no"], metavar="", help="be verbose")
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argsparser.add_argument("-c", "--config", dest="config",
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required=True, metavar="", help="path to a JSON config file")
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argsparser.add_argument("-s", "--source", dest="source_path",
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required=True, metavar="", help="source code path")
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argsparser.add_argument("-p", "--prologue", dest="prologue",
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required=False, metavar="", help="path to a C prologue file")
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amalgamation = Amalgamation(argsparser.parse_args())
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amalgamation.generate()
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if __name__ == "__main__":
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main()
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