}
        return null;
    }

    @Override
    public File getSdkmanCandidatesDirectory() {
        String asdfEnvVar = providerFactory.environmentVariable("SDKMAN_CANDIDATES_DIR").getOrNull();
        if (asdfEnvVar != null) {
            return new File(asdfEnvVar);
        }
        return new File(systemProperties.getUserHome(), ".sdkman/candidates");
    }

    def "environment variables influence configuration"() {
        given:
        environment.put("ASDF_DATA_DIR", "/other/.asdf")
        environment.put("JABBA_HOME", "/other/.jabba")
        environment.put("SDKMAN_CANDIDATES_DIR", "/other/.sdkman/candidates")

        def configuration = new DefaultToolchainConfiguration(OperatingSystem.LINUX, systemProperties, environment)

        expect:

    "USERDOMAIN",
    "USERPROFILE",
    "LOCALAPPDATA",

    // Used by Gradle test infrastructure
    "REPO_MIRROR_URLS",
    "YARNPKG_MIRROR_URL",

    // Used to find local java installations
    "SDKMAN_CANDIDATES_DIR",

    // temp dir
    "TMPDIR",
    "TMP",
    "TEMP",

    // Seems important on Windows
    "ALLUSERSPROFILE",
    "PUBLIC",
    "windir",

            return new File(jabbaHome);
        }
        return null;
    }

    @Override
    public File getSdkmanCandidatesDirectory() {
        String asdfEnvVar = environment.get("SDKMAN_CANDIDATES_DIR");
        if (asdfEnvVar != null) {
            return new File(asdfEnvVar);
        }
        return new File(systemProperties.getUserHome(), ".sdkman/candidates");
    }