Function _ensure_gitignore

agent/src/opentrace_agent/cli/main.py:172–190

Create or backfill ``.gitignore`` so older workspaces pick up new patterns.

(directory: Path)

def _ensure_gitignore(directory: Path) -> None:
    """Create or backfill ``.gitignore`` so older workspaces pick up new patterns."""
    gi = directory / ".gitignore"
    if not gi.exists():
        gi.write_text(_GITIGNORE_CONTENT)
        return

    existing = gi.read_text()
    existing_lines = set(existing.splitlines())
    missing = [
        line
        for line in _GITIGNORE_CONTENT.splitlines()
        if line and not line.startswith("#") and line not in existing_lines
    ]
    if not missing:
        return

    sep = "" if existing.endswith("\n") else "\n"
    gi.write_text(existing + sep + "\n".join(missing) + "\n")


@click.group(invoke_without_command=True)