Function renameInternalPythonSymbols

scripts/codegen/utils.ts:687–717

(
    code: string,
    typeNames: Iterable<string>
)

 * identifiers for the types that carry `visibility: "internal"`.
 */
export function renameInternalPythonSymbols(
    code: string,
    typeNames: Iterable<string>
): string {
    const escapeRegex = (s: string): string => s.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
    let result = code;
    const sortedTypes = [...typeNames].sort((a, b) => b.length - a.length);
    // Phase 1: rename each identifier globally at word boundaries.
    for (const t of sortedTypes) {
        result = result.replace(
            new RegExp(`(?<![A-Za-z0-9_])${escapeRegex(t)}(?![A-Za-z0-9_])`, "g"),
            `_${t}`
        );
    }
    // Phase 2: restore JSON-key strings that match the rename target. Those
    // strings carry the wire-protocol definition name and must remain untouched
    // regardless of the Python-side rename. Patterns: `obj.get("Foo")` and
    // `result["Foo"] = ...` in quicktype's serialization helpers.
    for (const t of sortedTypes) {
        const escaped = escapeRegex(t);
        result = result.replace(
            new RegExp(`(obj\\.get\\(")_${escaped}("\\))`, "g"),
            `$1${t}$2`
        );
        result = result.replace(
            new RegExp(`(result\\[")_${escaped}("\\])`, "g"),
            `$1${t}$2`
        );
    }
    return result;
}

/**
 * Collects the set of (publicTypeName, internalFieldName[]) pairs from a