*
     * @param distributionUrl The distribution url.
     * @param fileRoot The root directory to resolve relative urls against.
     * @return The URI.
     * @throws URISyntaxException If the url is not a valid URI.
     */
    public static URI convertDistributionUrl(String distributionUrl, File fileRoot) throws URISyntaxException {
        URI source = new URI(distributionUrl);
        if (source.getScheme() == null) {

        then:
        Exception e = thrown()
        e.cause.message == "No value with key 'distributionUrl' specified in wrapper properties file '$propertiesFile'."
    }

    def "supports relative distribution url"() {
        given:
        properties.distributionUrl = 'some/relative/url/to/bin.zip'
        propertiesFile.withOutputStream { properties.store(it, 'header') }

        when:

        File wrapperJarOutputFile, String jarFileRelativePath,
        File unixScript, File batchScript,
        @Nullable String distributionUrl,
        boolean validateDistributionUrl,
        @Nullable Integer networkTimeout
    ) {
        writeProperties(wrapperPropertiesOutputFile, distributionUrl, distributionSha256Sum, distributionBase, distributionPath, archiveBase, archivePath, networkTimeout, validateDistributionUrl);

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions-snapshots/gradle-8.9-20240529002035+0000-bin.zip
networkTimeout=10000
validateDistributionUrl=true
zipStoreBase=GRADLE_USER_HOME

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-all.zip
networkTimeout=10000
validateDistributionUrl=true
zipStoreBase=GRADLE_USER_HOME

distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip

            println("updating wrapper to $label version: ${versionInfo.version} (downloadUrl: ${versionInfo.downloadUrl})")
            wrapperTask.get().distributionUrl = versionInfo.downloadUrl
        }
    }
}

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
networkTimeout=10000
validateDistributionUrl=true
zipStoreBase=GRADLE_USER_HOME

# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
distributionSha256Sum=83aaf914c785c9faed661f223000a92d1de9553f5c82d3b4362e66d9c031625f

            </tr>
            <tr>
                <td>archiveBase</td>
                <td><literal>PathBase.GRADLE_USER_HOME</literal></td>
            </tr>
            <tr>
                <td>distributionUrl</td>
                <td><literal>"http\://services.gradle.org/distributions/gradle-${gradleVersion}-bin.zip"</literal>
                    (or