src/journal_lib/parse/preprocessing.py


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import re
from pathlib import Path

def preprocess_includes(filepath: Path):
    """
    Reads the file at 'filepath', processing any "include" directives,
    and returns a single string containing the preprocessed file content.

    This does not report circular includes, so that would become a infinite loop
    """
    INCLUDE_RE = re.compile(r'^\s*include\s+([^\n]+)\s*$', re.IGNORECASE)

    def read_file(file_path):
        with open(file_path, 'r') as file:
            return file.readlines()

    lines = read_file(filepath)
    i = 0
    while i < len(lines):
        match = INCLUDE_RE.match(lines[i])
        if match:
            included_file_path = match.group(1)
            included_lines = read_file(included_file_path)
            lines[i:i+1] = included_lines
        else:
            i += 1

    return ''.join(lines)