mirror of
https://github.com/ditkrg/todo-to-issue-action.git
synced 2026-01-22 13:56:44 +00:00
662435d7fc
Split main.py into modules to (mostly) isolate the GitHub-specific code from the general TODO detection and program logic. This is both for readability/maintainability and to prepare for potentially supporting other version control systems (e.g. GitLab, BitBucket).
529 lines
26 KiB
Python
529 lines
26 KiB
Python
import os
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import re
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import requests
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from ruamel.yaml import YAML
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from LineStatus import *
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from Issue import *
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import requests
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import json
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from urllib.parse import urlparse
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class TodoParser(object):
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"""Parser for extracting information from a given diff file."""
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FILE_HUNK_PATTERN = r'(?<=diff)(.*?)(?=diff\s--git\s)'
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HEADER_PATTERN = r'(?<=--git).*?(?=$\n(index|new|deleted))'
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LINE_PATTERN = r'^.*$'
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FILENAME_PATTERN = re.compile(r'(?<=a/).+?(?=\sb/)')
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LINE_NUMBERS_PATTERN = re.compile(r'@@[\d\s,\-+]*\s@@.*')
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LINE_NUMBERS_INNER_PATTERN = re.compile(r'@@[\d\s,\-+]*\s@@')
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ADDITION_PATTERN = re.compile(r'(?<=^\+).*')
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DELETION_PATTERN = re.compile(r'(?<=^-).*')
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REF_PATTERN = re.compile(r'.+?(?=\))')
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LABELS_PATTERN = re.compile(r'(?<=labels:\s).+', re.IGNORECASE)
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ASSIGNEES_PATTERN = re.compile(r'(?<=assignees:\s).+', re.IGNORECASE)
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MILESTONE_PATTERN = re.compile(r'(?<=milestone:\s).+', re.IGNORECASE)
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ISSUE_URL_PATTERN = re.compile(r'(?<=Issue URL:\s).+', re.IGNORECASE)
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ISSUE_NUMBER_PATTERN = re.compile(r'/issues/(\d+)', re.IGNORECASE)
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def __init__(self):
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# Determine if the issues should be escaped.
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self.should_escape = os.getenv('INPUT_ESCAPE', 'true') == 'true'
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# Load any custom identifiers, otherwise use the default.
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custom_identifiers = os.getenv('INPUT_IDENTIFIERS')
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self.identifiers = ['TODO']
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self.identifiers_dict = None
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if custom_identifiers:
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try:
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custom_identifiers_dict = json.loads(custom_identifiers)
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for identifier_dict in custom_identifiers_dict:
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if type(identifier_dict['name']) is not str or type(identifier_dict['labels']) is not list:
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raise TypeError
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self.identifiers = [identifier['name'] for identifier in custom_identifiers_dict]
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self.identifiers_dict = custom_identifiers_dict
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except (json.JSONDecodeError, KeyError, TypeError):
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print('Invalid identifiers dict, ignoring.')
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self.languages_dict = None
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# Check if the standard collections should be loaded.
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if os.getenv('INPUT_NO_STANDARD', 'false') != 'true':
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# Load the languages data for ascertaining file types.
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languages_url = 'https://raw.githubusercontent.com/github/linguist/master/lib/linguist/languages.yml'
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languages_request = requests.get(url=languages_url)
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if languages_request.status_code == 200:
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languages_data = languages_request.text
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yaml = YAML(typ='safe')
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self.languages_dict = yaml.load(languages_data)
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else:
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raise Exception('Cannot retrieve languages data. Operation will abort.')
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# Load the comment syntax data for identifying comments.
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syntax_url = 'https://raw.githubusercontent.com/alstr/todo-to-issue-action/master/syntax.json'
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syntax_request = requests.get(url=syntax_url)
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if syntax_request.status_code == 200:
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self.syntax_dict = syntax_request.json()
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else:
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raise Exception('Cannot retrieve syntax data. Operation will abort.')
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else:
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self.syntax_dict = []
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self.languages_dict = {}
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custom_languages = os.getenv('INPUT_LANGUAGES', '')
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if custom_languages != '':
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# Load all custom languages.
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for path in custom_languages.split(','):
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# noinspection PyBroadException
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try:
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# Decide if the path is a url or local file.
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if path.startswith('http'):
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languages_request = requests.get(path)
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if languages_request.status_code != 200:
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print(f'Cannot retrieve custom language file "{path}".')
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continue
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data = languages_request.json()
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else:
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path = os.path.join(os.getcwd(), path)
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if not os.path.exists(path) or not os.path.isfile(path):
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print(f'Cannot retrieve custom language file "{path}".')
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continue
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with open(path) as f:
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data = json.load(f)
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# Iterate through the definitions.
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for lang in data:
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# Add/replace the language definition.
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self.languages_dict[lang['language']] = {}
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self.languages_dict[lang['language']]['type'] = ''
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self.languages_dict[lang['language']]['color'] = ''
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self.languages_dict[lang['language']]['extensions'] = lang['extensions']
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self.languages_dict[lang['language']]['source'] = ''
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self.languages_dict[lang['language']]['ace_mode'] = 'text'
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self.languages_dict[lang['language']]['language_id'] = 0
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# Check if comment syntax for the language name already exists.
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counter = 0
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exists = False
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for syntax in self.syntax_dict:
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if syntax['language'] == lang['language']:
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exists = True
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break
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counter = counter + 1
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if exists:
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# When the syntax exists it will be popped out of the list.
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self.syntax_dict.pop(counter)
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# And be replaced with the new syntax definition.
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self.syntax_dict.append({
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'language': lang['language'],
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'markers': lang['markers']
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})
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except Exception:
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print(f'An error occurred in the custom language file "{path}".')
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print('Please check the file, or if it represents undefined behavior, '
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'create an issue at https://github.com/alstr/todo-to-issue-action/issues.')
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# noinspection PyTypeChecker
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def parse(self, diff_file):
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issues = []
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# The parser works by gradually breaking the diff file down into smaller and smaller segments.
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# At each level relevant information is extracted.
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# First separate the diff into sections for each changed file.
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file_hunks = re.finditer(self.FILE_HUNK_PATTERN, diff_file.read(), re.DOTALL)
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last_end = None
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extracted_file_hunks = []
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for i, file_hunk in enumerate(file_hunks):
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extracted_file_hunks.append(file_hunk.group(0))
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last_end = file_hunk.end()
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diff_file.seek(0)
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extracted_file_hunks.append(diff_file.read()[last_end:])
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diff_file.close()
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code_blocks = []
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prev_block = None
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# Iterate through each section extracted above.
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for hunk in extracted_file_hunks:
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# Extract the file information so we can figure out the Markdown language and comment syntax.
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header_search = re.search(self.HEADER_PATTERN, hunk, re.MULTILINE)
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if not header_search:
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continue
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files = header_search.group(0)
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filename_search = re.search(self.FILENAME_PATTERN, files)
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if not filename_search:
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continue
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curr_file = filename_search.group(0)
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if self._should_ignore(curr_file):
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continue
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curr_markers, curr_markdown_language = self._get_file_details(curr_file)
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if not curr_markers or not curr_markdown_language:
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print(f'Could not check "{curr_file}" for TODOs as this language is not yet supported by default.')
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continue
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# Break this section down into individual changed code blocks.
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line_numbers_iterator = re.finditer(self.LINE_NUMBERS_PATTERN, hunk)
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for i, line_numbers in enumerate(line_numbers_iterator):
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line_numbers_inner_search = re.search(self.LINE_NUMBERS_INNER_PATTERN, line_numbers.group(0))
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line_numbers_str = line_numbers_inner_search.group(0).strip('@@ -')
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start_line = line_numbers_str.split(' ')[1].strip('+')
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start_line = int(start_line.split(',')[0])
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# Put this information into a temporary dict for simplicity.
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block = {
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'file': curr_file,
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'markers': curr_markers,
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'markdown_language': curr_markdown_language,
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'start_line': start_line,
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'hunk': hunk,
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'hunk_start': line_numbers.end(),
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'hunk_end': None
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}
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prev_index = len(code_blocks) - 1
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# Set the end of the last code block based on the start of this one.
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if prev_block and prev_block['file'] == block['file']:
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# noinspection PyTypedDict
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code_blocks[prev_index]['hunk_end'] = line_numbers.start()
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code_blocks[prev_index]['hunk'] = (prev_block['hunk']
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[prev_block['hunk_start']:line_numbers.start()])
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elif prev_block:
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code_blocks[prev_index]['hunk'] = prev_block['hunk'][prev_block['hunk_start']:]
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code_blocks.append(block)
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prev_block = block
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if len(code_blocks) > 0:
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last_index = len(code_blocks) - 1
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last_block = code_blocks[last_index]
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code_blocks[last_index]['hunk'] = last_block['hunk'][last_block['hunk_start']:]
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# Now for each code block, check for comments, then those comments for TODOs.
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for block in code_blocks:
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for marker in block['markers']:
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# Check if there are line or block comments.
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if marker['type'] == 'line':
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# Add a negative lookup to include the second character from alternative comment patterns.
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# This step is essential to handle cases like in Julia, where '#' and '#=' are comment patterns.
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# It ensures that when a space after the comment is optional ('\s' => '\s*'),
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# the second character would be matched because of the any character expression ('.+').
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suff_escape_list = []
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pref_escape_list = []
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for to_escape in block['markers']:
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if to_escape['type'] == 'line':
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if to_escape['pattern'] == marker['pattern']:
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continue
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if marker['pattern'][0] == to_escape['pattern'][0]:
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suff_escape_list.append(self._extract_character(to_escape['pattern'], 1))
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else:
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# Block comments and line comments cannot have the same comment pattern,
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# so a check if the string is the same is unnecessary.
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if to_escape['pattern']['start'][0] == marker['pattern'][0]:
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suff_escape_list.append(self._extract_character(to_escape['pattern']['start'], 1))
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search = to_escape['pattern']['end'].find(marker['pattern'])
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if search != -1:
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pref_escape_list.append(self._extract_character(to_escape['pattern']['end'],
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search - 1))
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comment_pattern = (r'(^.*'
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+ (r'(?<!(' + '|'.join(pref_escape_list) + r'))' if len(pref_escape_list) > 0
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else '')
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+ marker['pattern']
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+ (r'(?!(' + '|'.join(suff_escape_list) + r'))' if len(suff_escape_list) > 0
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else '')
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+ r'\s*.+$)')
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comments = re.finditer(comment_pattern, block['hunk'], re.MULTILINE)
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extracted_comments = []
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prev_comment = None
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for i, comment in enumerate(comments):
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if prev_comment and comment.start() == prev_comment.end() + 1:
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extracted_comments[len(extracted_comments) - 1].append(comment)
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else:
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extracted_comments.append([comment])
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prev_comment = comment
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for comment in extracted_comments:
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extracted_issues = self._extract_issue_if_exists(comment, marker, block)
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if extracted_issues:
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issues.extend(extracted_issues)
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else:
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comment_pattern = (r'(?:[+\-\s]\s*' + marker['pattern']['start'] + r'.*?'
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+ marker['pattern']['end'] + ')')
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comments = re.finditer(comment_pattern, block['hunk'], re.DOTALL)
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extracted_comments = []
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for i, comment in enumerate(comments):
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if re.search('|'.join(self.identifiers), comment.group(0)):
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extracted_comments.append([comment])
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for comment in extracted_comments:
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extracted_issues = self._extract_issue_if_exists(comment, marker, block)
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if extracted_issues:
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issues.extend(extracted_issues)
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for i, issue in enumerate(issues):
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# Strip some of the diff symbols so it can be included as a code snippet in the issue body.
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# Strip removed lines.
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cleaned_hunk = re.sub(r'\n^-.*$', '', issue.hunk, 0, re.MULTILINE)
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# Strip leading symbols/whitespace.
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cleaned_hunk = re.sub(r'^.', '', cleaned_hunk, 0, re.MULTILINE)
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# Strip newline message.
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cleaned_hunk = re.sub(r'\n\sNo newline at end of file', '', cleaned_hunk, 0, re.MULTILINE)
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issue.hunk = cleaned_hunk
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return issues
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def _get_language_details(self, language_name, attribute, value):
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"""Try and get the Markdown language and comment syntax data based on a specified attribute of the language."""
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attributes = [at.lower() for at in self.languages_dict[language_name][attribute]]
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if value.lower() in attributes:
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for syntax_details in self.syntax_dict:
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if syntax_details['language'] == language_name:
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return syntax_details['markers'], self.languages_dict[language_name]['ace_mode']
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return None, None
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def _get_file_details(self, file):
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"""Try and get the Markdown language and comment syntax data for the given file."""
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file_name, extension = os.path.splitext(os.path.basename(file))
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for language_name in self.languages_dict:
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# Check if the file extension matches the language's extensions.
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if extension != '' and 'extensions' in self.languages_dict[language_name]:
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syntax_details, ace_mode = self._get_language_details(language_name, 'extensions', extension)
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if syntax_details is not None and ace_mode is not None:
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return syntax_details, ace_mode
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# Check if the file name matches the language's filenames.
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if 'filenames' in self.languages_dict[language_name]:
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syntax_details, ace_mode = self._get_language_details(language_name, 'filenames', file_name)
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if syntax_details is not None and ace_mode is not None:
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return syntax_details, ace_mode
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return None, None
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def _extract_issue_if_exists(self, comment, marker, code_block):
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"""Check this comment for TODOs, and if found, build an Issue object."""
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curr_issue = None
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found_issues = []
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line_statuses = []
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prev_line_title = False
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for match in comment:
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comment_lines = match.group().split('\n')
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for line in comment_lines:
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line_status, committed_line = self._get_line_status(line)
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line_statuses.append(line_status)
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cleaned_line = self._clean_line(committed_line, marker)
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line_title, ref, identifier = self._get_title(cleaned_line)
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if line_title:
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if prev_line_title and line_status == line_statuses[-2]:
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# This means that there is a separate one-line TODO directly above this one.
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# We need to store the previous one.
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curr_issue.status = line_status
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found_issues.append(curr_issue)
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curr_issue = Issue(
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title=line_title,
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labels=[],
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assignees=[],
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milestone=None,
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body=[],
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hunk=code_block['hunk'],
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file_name=code_block['file'],
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start_line=code_block['start_line'],
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num_lines=1,
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markdown_language=code_block['markdown_language'],
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status=line_status,
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identifier=identifier,
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ref=ref,
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issue_url=None,
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issue_number=None
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)
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prev_line_title = True
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# Calculate the file line number that this issue references.
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hunk_lines = re.finditer(self.LINE_PATTERN, code_block['hunk'], re.MULTILINE)
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start_line = code_block['start_line']
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for i, hunk_line in enumerate(hunk_lines):
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if hunk_line.group(0) == line:
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curr_issue.start_line = start_line
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break
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if i != 0 and (hunk_line.group(0).startswith('+') or not hunk_line.group(0).startswith('-')):
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start_line += 1
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elif curr_issue:
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# Extract other issue information that may exist below the title.
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line_labels = self._get_labels(cleaned_line)
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line_assignees = self._get_assignees(cleaned_line)
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line_milestone = self._get_milestone(cleaned_line)
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line_url = self._get_issue_url(cleaned_line)
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if line_labels:
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curr_issue.labels.extend(line_labels)
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elif line_assignees:
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curr_issue.assignees.extend(line_assignees)
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elif line_milestone:
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curr_issue.milestone = line_milestone
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elif line_url:
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curr_issue.issue_url = line_url
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issue_number_search = self.ISSUE_NUMBER_PATTERN.search(line_url)
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if issue_number_search:
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curr_issue.issue_number = issue_number_search.group(1)
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elif len(cleaned_line) and line_status != LineStatus.DELETED:
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if self.should_escape:
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curr_issue.body.append(self._escape_markdown(cleaned_line))
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else:
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curr_issue.body.append(cleaned_line)
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if not line.startswith('-'):
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curr_issue.num_lines += 1
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if not line_title:
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prev_line_title = False
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if curr_issue is not None and curr_issue.identifier is not None and self.identifiers_dict is not None:
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for identifier_dict in self.identifiers_dict:
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if identifier_dict['name'] == curr_issue.identifier:
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for label in identifier_dict['labels']:
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if label not in curr_issue.labels:
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curr_issue.labels.append(label)
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if curr_issue is not None:
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# If all the lines are unchanged, don't do anything.
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if all(s == LineStatus.UNCHANGED for s in line_statuses):
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return None
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# If the title line hasn't changed, but the info below has, we need to mark it as an update (addition).
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if (curr_issue.status == LineStatus.UNCHANGED
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and (LineStatus.ADDED in line_statuses or LineStatus.DELETED in line_statuses)):
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curr_issue.status = LineStatus.ADDED
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found_issues.append(curr_issue)
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return found_issues
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@staticmethod
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def _escape_markdown(comment):
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# All basic characters according to: https://www.markdownguide.org/basic-syntax
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must_escape = ['\\', '<', '>', '#', '`', '*', '_', '[', ']', '(', ')', '!', '+', '-', '.', '|', '{', '}', '~',
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'=']
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escaped = ''
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# Linear Escape Algorithm, because the algorithm ends in an infinite loop when using the function 'replace',
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# which tries to replace all backslashes with duplicate backslashes, i.e. also the already other escaped
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# characters.
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for c in comment:
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if c in must_escape:
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escaped += '\\' + c
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else:
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escaped += c
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return escaped
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@staticmethod
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def _extract_character(input_str, pos):
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# Extracts a character from the input string at the specified position,
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# considering escape sequences when applicable.
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# Test cases
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# print(_extract_character("/\\*", 1)) # Output: "\*"
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# print(_extract_character("\\*", 0)) # Output: "\*"
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# print(_extract_character("\\", 0)) # Output: "\\"
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# print(_extract_character("w", 0)) # Output: "w"
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# print(_extract_character("wa", 1)) # Output: "a"
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# print(_extract_character("\\\\w", 1)) # Output: "\\"
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if input_str[pos] == '\\':
|
|
if pos >= 1 and not input_str[pos - 1] == '\\' and len(input_str) > pos + 1:
|
|
return '\\' + input_str[pos + 1]
|
|
return '\\\\'
|
|
if pos >= 1:
|
|
if input_str[pos - 1] == '\\':
|
|
return '\\' + input_str[pos]
|
|
return input_str[pos]
|
|
|
|
def _get_line_status(self, comment):
|
|
"""Return a Tuple indicating whether this is an addition/deletion/unchanged, plus the cleaned comment."""
|
|
addition_search = self.ADDITION_PATTERN.search(comment)
|
|
if addition_search:
|
|
return LineStatus.ADDED, addition_search.group(0)
|
|
else:
|
|
deletion_search = self.DELETION_PATTERN.search(comment)
|
|
if deletion_search:
|
|
return LineStatus.DELETED, deletion_search.group(0)
|
|
return LineStatus.UNCHANGED, comment[1:]
|
|
|
|
@staticmethod
|
|
def _clean_line(comment, marker):
|
|
"""Remove unwanted symbols and whitespace."""
|
|
comment = comment.strip()
|
|
if marker['type'] == 'block':
|
|
start_pattern = r'^' + marker['pattern']['start']
|
|
end_pattern = marker['pattern']['end'] + r'$'
|
|
comment = re.sub(start_pattern, '', comment)
|
|
comment = re.sub(end_pattern, '', comment)
|
|
# Some block comments might have an asterisk on each line.
|
|
if '*' in start_pattern and comment.startswith('*'):
|
|
comment = comment.lstrip('*')
|
|
else:
|
|
pattern = r'^' + marker['pattern']
|
|
comment = re.sub(pattern, '', comment)
|
|
return comment.strip()
|
|
|
|
def _get_title(self, comment):
|
|
"""Check the passed comment for a new issue title (and reference, if specified)."""
|
|
title = None
|
|
ref = None
|
|
title_identifier = None
|
|
for identifier in self.identifiers:
|
|
title_identifier = identifier
|
|
title_pattern = re.compile(fr'(?<={identifier}[\s:]).+', re.IGNORECASE)
|
|
title_search = title_pattern.search(comment, re.IGNORECASE)
|
|
if title_search:
|
|
title = title_search.group(0).strip(': ')
|
|
break
|
|
else:
|
|
title_ref_pattern = re.compile(fr'(?<={identifier}\().+', re.IGNORECASE)
|
|
title_ref_search = title_ref_pattern.search(comment, re.IGNORECASE)
|
|
if title_ref_search:
|
|
title = title_ref_search.group(0).strip()
|
|
ref_search = self.REF_PATTERN.search(title)
|
|
if ref_search:
|
|
ref = ref_search.group(0)
|
|
title = title.replace(ref, '', 1).lstrip(':) ')
|
|
break
|
|
return title, ref, title_identifier
|
|
|
|
def _get_issue_url(self, comment):
|
|
"""Check the passed comment for a GitHub issue URL."""
|
|
url_search = self.ISSUE_URL_PATTERN.search(comment, re.IGNORECASE)
|
|
url = None
|
|
if url_search:
|
|
url = url_search.group(0)
|
|
parsed_url = urlparse(url)
|
|
return url if all([parsed_url.scheme, parsed_url.netloc]) else None
|
|
return url
|
|
|
|
def _get_labels(self, comment):
|
|
"""Check the passed comment for issue labels."""
|
|
labels_search = self.LABELS_PATTERN.search(comment, re.IGNORECASE)
|
|
labels = []
|
|
if labels_search:
|
|
labels = labels_search.group(0).replace(', ', ',')
|
|
labels = list(filter(None, labels.split(',')))
|
|
return labels
|
|
|
|
def _get_assignees(self, comment):
|
|
"""Check the passed comment for issue assignees."""
|
|
assignees_search = self.ASSIGNEES_PATTERN.search(comment, re.IGNORECASE)
|
|
assignees = []
|
|
if assignees_search:
|
|
assignees = assignees_search.group(0).replace(', ', ',')
|
|
assignees = list(filter(None, assignees.split(',')))
|
|
return assignees
|
|
|
|
def _get_milestone(self, comment):
|
|
"""Check the passed comment for a milestone."""
|
|
milestone_search = self.MILESTONE_PATTERN.search(comment, re.IGNORECASE)
|
|
milestone = None
|
|
if milestone_search:
|
|
milestone = milestone_search.group(0)
|
|
return milestone
|
|
|
|
# noinspection PyMethodMayBeStatic
|
|
def _should_ignore(self, file):
|
|
ignore_patterns = os.getenv('INPUT_IGNORE', None)
|
|
if ignore_patterns:
|
|
for pattern in filter(None, [pattern.strip() for pattern in ignore_patterns.split(',')]):
|
|
if re.match(pattern, file):
|
|
return True
|
|
return False
|
|
|