public static void environment()

in daemon/src/main/java/org/mvndaemon/mvnd/cli/EnvHelper.java [53:95]
43 lines of code
8 McCabe index (conditional complexity)

    public static void environment(String workingDir, Map<String, String> clientEnv, Consumer<String> log) {
        Map<String, String> requested = new TreeMap<>(clientEnv);
        Map<String, String> actual = new TreeMap<>(System.getenv());
        requested.put("PWD", Os.current().isCygwin() ? toCygwin(workingDir) : workingDir);
        List<String> diffs = Stream.concat(requested.keySet().stream(), actual.keySet().stream())
                .sorted()
                .distinct()
                .filter(s -> !s.startsWith("JAVA_MAIN_CLASS_"))
                .filter(key -> !Objects.equals(requested.get(key), actual.get(key)))
                .collect(Collectors.toList());
        try {
            for (String key : diffs) {
                String vr = requested.get(key);
                int rc = CLibrary.setenv(key, vr);
                if (Os.current() == Os.WINDOWS ^ rc != 0) {
                    log.accept(String.format("Error setting environment value %s = %s", key, vr));
                }
            }
            setEnv(requested);
            chDir(workingDir);
        } catch (Exception e) {
            log.accept("Environment mismatch ! Could not set the environment (" + e + ")");
        }
        Map<String, String> nactual = new TreeMap<>(System.getenv());
        diffs = Stream.concat(requested.keySet().stream(), actual.keySet().stream())
                .sorted()
                .distinct()
                .filter(s -> !s.startsWith("JAVA_MAIN_CLASS_"))
                .filter(key -> !Objects.equals(requested.get(key), nactual.get(key)))
                .collect(Collectors.toList());
        if (!diffs.isEmpty()) {
            log.accept("A few environment mismatches have been detected between the client and the daemon.");
            diffs.forEach(key -> {
                String vr = requested.get(key);
                String va = nactual.get(key);
                log.accept(String.format(
                        "   %s -> %s instead of %s",
                        key, va != null ? "'" + va + "'" : "<null>", vr != null ? "'" + vr + "'" : "<null>"));
            });
            log.accept("If the difference matters to you, stop the running daemons using mvnd --stop and");
            log.accept("start a new daemon from the current environment by issuing any mvnd build command.");
        }
    }