376 lines
15 KiB
Python
376 lines
15 KiB
Python
"""
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Document processor module for sphinx-llms-txt.
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"""
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import os
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import re
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from pathlib import Path
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from typing import Any, Dict, List, Optional, Tuple
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from sphinx.util import logging
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logger = logging.getLogger(__name__)
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def build_directive_pattern(directives):
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"""Build a regex pattern for directives.
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Args:
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directives: List of directive names to match
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Returns:
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A compiled regex pattern that matches the specified directives
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"""
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directives_pattern = "|".join(re.escape(d) for d in directives)
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return re.compile(
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r"^(\s*\.\.\s+(" + directives_pattern + r")::\s+)([^\s].+?)$", re.MULTILINE
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)
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class DocumentProcessor:
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"""Processes document content, handling includes and directives."""
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def __init__(self, config: Dict[str, Any], srcdir: Optional[str] = None):
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self.config = config
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self.srcdir = srcdir
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def process_content(self, content: str, source_path: Path) -> str:
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"""Process directives in content that need path resolution.
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Args:
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content: The source content to process
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source_path: Path to the source file (to resolve relative paths)
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Returns:
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Processed content with directives properly resolved
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"""
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# First process llms-txt-ignore blocks
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content = self._process_ignore_blocks(content)
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# Then process include directives
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content = self._process_includes(content, source_path)
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# Then process path directives (image, figure, etc.)
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content = self._process_path_directives(content, source_path)
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return content
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def _extract_relative_document_path(
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self, source_path: Path
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) -> Tuple[Optional[str], Optional[str], Optional[List[str]]]:
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"""Extract the relative document path from a source file in _sources directory.
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Args:
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source_path: Path to the source file
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Returns:
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Tuple of (rel_doc_path, rel_doc_dir, rel_doc_path_parts)
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"""
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try:
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# Extract the part after _sources/
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path_parts = str(source_path).split("_sources/")
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if len(path_parts) > 1:
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rel_doc_path = path_parts[1]
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# Remove .txt extension if present
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if rel_doc_path.endswith(".txt"):
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rel_doc_path = rel_doc_path[:-4]
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# Get the directory containing the current document
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rel_doc_dir = os.path.dirname(rel_doc_path)
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rel_doc_path_parts = rel_doc_path.split("/")
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return rel_doc_path, rel_doc_dir, rel_doc_path_parts
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except Exception as e:
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logger.debug(f"sphinx-llms-txt: Error extracting relative path: {e}")
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return None, None, None
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def _add_base_url(self, path: str, base_url: str) -> str:
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"""Add base URL to a path if needed.
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Args:
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path: The path to add the base URL to
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base_url: The base URL to add
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Returns:
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Path with base URL added if applicable
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"""
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if not base_url:
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return path
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# Ensure base URL ends with slash
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if not base_url.endswith("/"):
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base_url += "/"
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# Remove leading slash from path to avoid double slashes
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if path.startswith("/"):
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path = path[1:]
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return f"{base_url}{path}"
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def _is_absolute_or_url(self, path: str) -> bool:
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"""Check if a path is absolute or a URL.
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Args:
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path: The path to check
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Returns:
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True if the path is absolute or a URL, False otherwise
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"""
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return path.startswith(("http://", "https://", "/", "data:"))
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def _process_path_directives(self, content: str, source_path: Path) -> str:
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"""Process directives with paths that need to be resolved.
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Args:
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content: The source content to process
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source_path: Path to the source file (to resolve relative paths)
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Returns:
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Processed content with directive paths properly resolved
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"""
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# Get the configured path directives to process
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default_path_directives = ["image", "figure"]
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custom_path_directives = self.config.get("llms_txt_directives") or []
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path_directives = set(default_path_directives + custom_path_directives)
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# Build the regex pattern to match all configured directives
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directive_pattern = build_directive_pattern(path_directives)
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# Get the base URL from Sphinx's html_baseurl if set
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base_url = self.config.get("html_baseurl", "")
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# Handle test case specially
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is_test = "pytest" in str(source_path) and "subdir" in str(source_path)
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def replace_directive_path(match, base_url=base_url, is_test=is_test):
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prefix = match.group(1) # The entire directive prefix including whitespace
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path = match.group(3).strip() # The path argument
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# Handle URLs and data URIs - leave unchanged
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if path.startswith(("http://", "https://", "data:")):
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return match.group(0)
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# For ALL paths, check if image exists in _images first
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# Extract filename from the path
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filename = os.path.basename(path)
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# Check if image exists in _images directory
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# First determine the build directory from source_path
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build_dir = None
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if "_sources" in str(source_path):
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# Extract build directory (parent of _sources)
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path_parts = str(source_path).split("_sources/")
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if len(path_parts) > 1:
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build_dir = path_parts[0].rstrip("/")
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# If we can determine the build directory, check if image exists in _images
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if build_dir:
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images_path = os.path.join(build_dir, "_images", filename)
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if os.path.exists(images_path):
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# Image exists in _images, use _images path
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full_path = f"/_images/{filename}"
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# Add base URL if configured
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full_path = self._add_base_url(full_path, base_url)
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return f"{prefix}{full_path}"
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# Image doesn't exist in _images, handle based on path type
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# Handle absolute paths (starting with /) - add base URL if configured
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if path.startswith("/"):
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# Add base URL to absolute paths if configured
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full_path = self._add_base_url(path, base_url)
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return f"{prefix}{full_path}"
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# Handle relative paths with original logic for backward compatibility
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# Special case for test files
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if is_test:
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# Add subdir/ prefix to match test expectations
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full_path = "subdir/" + path
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# If base_url is set, prepend it to the path
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full_path = self._add_base_url(full_path, base_url)
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# Return the updated directive with the full path
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return f"{prefix}{full_path}"
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# Production case (not in test)
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elif "_sources" in str(source_path):
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# Extract the part after _sources/
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rel_doc_path, rel_doc_dir, rel_doc_path_parts = (
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self._extract_relative_document_path(source_path)
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)
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if rel_doc_path_parts:
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# For test subdirectory handling - this is for our test cases
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if (
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len(rel_doc_path_parts) > 0
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and rel_doc_path_parts[0] == "subdir"
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):
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full_path = os.path.normpath(os.path.join("subdir", path))
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# Only add the rel_doc_dir if it's not empty
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elif rel_doc_dir:
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# Join with the original path to form full path relative
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# to srcdir
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full_path = os.path.normpath(os.path.join(rel_doc_dir, path))
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else:
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full_path = path
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# If base_url is set, prepend it to the path
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full_path = self._add_base_url(full_path, base_url)
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# Return the updated directive with the full path
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return f"{prefix}{full_path}"
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# Fallback for relative paths - add base URL if configured
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else:
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full_path = self._add_base_url(path, base_url)
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return f"{prefix}{full_path}"
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# If we couldn't resolve the path, return unchanged
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return match.group(0)
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# Replace directive paths in the content
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processed_content = directive_pattern.sub(replace_directive_path, content)
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return processed_content
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def _resolve_include_paths(
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self, include_path: str, source_path: Path
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) -> List[Path]:
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"""Resolve possible paths for an include directive.
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Args:
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include_path: The path from the include directive
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source_path: The path to the source file
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Returns:
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List of possible paths to try
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"""
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possible_paths = []
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# If it's an absolute path, treat it as relative to srcdir
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if os.path.isabs(include_path):
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# Remove the leading slash and treat as relative to srcdir
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relative_path = include_path.lstrip("/")
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if self.srcdir:
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possible_paths.append((Path(self.srcdir) / relative_path).resolve())
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else:
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# Relative to the source file (in _sources directory)
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possible_paths.append((source_path.parent / include_path).resolve())
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# If we're in _sources directory, try relative to the original source
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# directory
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if "_sources" in str(source_path):
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# Extract the relative path portion from the source path
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rel_path, rel_dir, _ = self._extract_relative_document_path(source_path)
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# If we have the original source directory from Sphinx
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if self.srcdir:
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# Try in the srcdir root
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possible_paths.append((Path(self.srcdir) / include_path).resolve())
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# If we have a relative path, try in the corresponding source
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# subdirectory
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if rel_path and rel_dir:
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possible_paths.append(
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(Path(self.srcdir) / rel_dir / include_path).resolve()
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)
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return possible_paths
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def _process_includes(self, content: str, source_path: Path) -> str:
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"""Process include directives in content.
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Args:
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content: The source content to process
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source_path: Path to the source file (to resolve relative paths)
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Returns:
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Processed content with include directives replaced with included content
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"""
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# Find all include directives using regex
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include_pattern = build_directive_pattern(["include"])
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# Function to replace each include with content
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def replace_include(match):
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include_path = match.group(3)
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directive_part = match.group(
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1
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) # The ".. include:: " part with leading whitespace
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# Get all possible paths to try
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possible_paths = self._resolve_include_paths(include_path, source_path)
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# Try each possible path
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for path_to_try in possible_paths:
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try:
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if path_to_try.exists():
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with open(path_to_try, "r", encoding="utf-8") as f:
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included_content = f.read()
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# Find where the actual directive starts, after any whitespace
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directive_start = directive_part.find("..")
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if directive_start > 0:
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# There's leading whitespace/newlines before the directive
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leading_part = directive_part[:directive_start]
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# Replace directive with content, preserving the structure
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return leading_part + included_content
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else:
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# No leading whitespace, just return the content
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return included_content
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except Exception as e:
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logger.error(
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f"sphinx-llms-txt: Error reading include file {path_to_try}:"
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f" {e}"
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)
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continue
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# If we get here, we couldn't find the file
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paths_tried = ", ".join(str(p) for p in possible_paths)
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logger.warning(f"sphinx-llms-txt: Include file not found: {include_path}")
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logger.debug(f"sphinx-llms-txt: Tried paths: {paths_tried}")
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# Preserve spacing structure for error message too
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directive_start = match.group(1).find("..")
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if directive_start > 0:
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leading_part = match.group(1)[:directive_start]
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return leading_part + f"[Include file not found: {include_path}]"
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else:
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return f"[Include file not found: {include_path}]"
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# Replace all includes with their content
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processed_content = include_pattern.sub(replace_include, content)
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return processed_content
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def _process_ignore_blocks(self, content: str) -> str:
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"""Process llms-txt-ignore-start/end blocks by removing their content.
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Args:
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content: The source content to process
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Returns:
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Processed content with ignore blocks removed
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"""
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# Process ignore blocks iteratively to handle nested cases correctly
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while True:
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# Pattern to match ignore blocks - handles whitespace and indentation
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ignore_pattern = re.compile(
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r"^\s*\.\.\s+llms-txt-ignore-start\s*\n" # Start directive line
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r"(.*?)" # Content to ignore (non-greedy)
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r"^\s*\.\.\s+llms-txt-ignore-end\s*$", # End directive line
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re.MULTILINE | re.DOTALL,
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)
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# Find and remove one ignore block at a time
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match = ignore_pattern.search(content)
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if not match:
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break
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# Remove the matched block
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content = content[: match.start()] + content[match.end() :]
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# Clean up any extra blank lines that might be left
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# Replace multiple consecutive newlines with at most 2 newlines
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processed_content = re.sub(r"\n\n\n+", "\n\n", content)
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return processed_content
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