* Runs the binary compatibility check against two source trees.
     *
     * The fixture build supports both Java and Kotlin sources.
     *
     * @param v1 sources producer for V1, receiver is the `src/main` directory
     * @param v2 sources producer for V2, receiver is the `src/main` directory
     * @param block convenience block invoked on the result
     * @return the check result
     */
    private

const regexCache = Object.create(null)

// @param {pattern}
const makeRegex = (pattern, ignoreCase) => {
    let source = regexCache[pattern]

    if (!source) {
        source = REPLACERS.reduce(
            (prev, current) => prev.replace(current[0], current[1].bind(pattern)),
            pattern
        )
        regexCache[pattern] = source
    }

    return ignoreCase