protected Runnable settings()

in impl/maven-cli/src/main/java/org/apache/maven/cling/invoker/LookupInvoker.java [595:717]
109 lines of code
23 McCabe index (conditional complexity)

    protected Runnable settings(C context, boolean emitSettingsWarnings, SettingsBuilder settingsBuilder)
            throws Exception {
        Options mavenOptions = context.invokerRequest.options();

        Path userSettingsFile = null;
        if (mavenOptions.altUserSettings().isPresent()) {
            userSettingsFile =
                    context.cwd.resolve(mavenOptions.altUserSettings().get());

            if (!Files.isRegularFile(userSettingsFile)) {
                throw new FileNotFoundException("The specified user settings file does not exist: " + userSettingsFile);
            }
        } else {
            String userSettingsFileStr =
                    context.protoSession.getUserProperties().get(Constants.MAVEN_USER_SETTINGS);
            if (userSettingsFileStr != null) {
                userSettingsFile =
                        context.userDirectory.resolve(userSettingsFileStr).normalize();
            }
        }

        Path projectSettingsFile = null;
        if (mavenOptions.altProjectSettings().isPresent()) {
            projectSettingsFile =
                    context.cwd.resolve(mavenOptions.altProjectSettings().get());

            if (!Files.isRegularFile(projectSettingsFile)) {
                throw new FileNotFoundException(
                        "The specified project settings file does not exist: " + projectSettingsFile);
            }
        } else {
            String projectSettingsFileStr =
                    context.protoSession.getUserProperties().get(Constants.MAVEN_PROJECT_SETTINGS);
            if (projectSettingsFileStr != null) {
                projectSettingsFile = context.cwd.resolve(projectSettingsFileStr);
            }
        }

        Path installationSettingsFile = null;
        if (mavenOptions.altInstallationSettings().isPresent()) {
            installationSettingsFile =
                    context.cwd.resolve(mavenOptions.altInstallationSettings().get());

            if (!Files.isRegularFile(installationSettingsFile)) {
                throw new FileNotFoundException(
                        "The specified installation settings file does not exist: " + installationSettingsFile);
            }
        } else {
            String installationSettingsFileStr =
                    context.protoSession.getUserProperties().get(Constants.MAVEN_INSTALLATION_SETTINGS);
            if (installationSettingsFileStr != null) {
                installationSettingsFile = context.installationDirectory
                        .resolve(installationSettingsFileStr)
                        .normalize();
            }
        }

        context.installationSettingsPath = installationSettingsFile;
        context.projectSettingsPath = projectSettingsFile;
        context.userSettingsPath = userSettingsFile;

        UnaryOperator<String> interpolationSource = Interpolator.chain(
                context.protoSession.getUserProperties()::get, context.protoSession.getSystemProperties()::get);
        SettingsBuilderRequest settingsRequest = SettingsBuilderRequest.builder()
                .session(context.protoSession)
                .installationSettingsSource(
                        installationSettingsFile != null && Files.exists(installationSettingsFile)
                                ? Sources.fromPath(installationSettingsFile)
                                : null)
                .projectSettingsSource(
                        projectSettingsFile != null && Files.exists(projectSettingsFile)
                                ? Sources.fromPath(projectSettingsFile)
                                : null)
                .userSettingsSource(
                        userSettingsFile != null && Files.exists(userSettingsFile)
                                ? Sources.fromPath(userSettingsFile)
                                : null)
                .interpolationSource(interpolationSource)
                .build();

        customizeSettingsRequest(context, settingsRequest);
        if (context.eventSpyDispatcher != null) {
            context.eventSpyDispatcher.onEvent(settingsRequest);
        }

        context.logger.debug("Reading installation settings from '" + installationSettingsFile + "'");
        context.logger.debug("Reading project settings from '" + projectSettingsFile + "'");
        context.logger.debug("Reading user settings from '" + userSettingsFile + "'");

        SettingsBuilderResult settingsResult = settingsBuilder.build(settingsRequest);
        customizeSettingsResult(context, settingsResult);
        if (context.eventSpyDispatcher != null) {
            context.eventSpyDispatcher.onEvent(settingsResult);
        }

        context.effectiveSettings = settingsResult.getEffectiveSettings();
        context.interactive = mayDisableInteractiveMode(context, context.effectiveSettings.isInteractiveMode());
        context.localRepositoryPath = localRepositoryPath(context);

        if (emitSettingsWarnings && settingsResult.getProblems().hasWarningProblems()) {
            int totalProblems = settingsResult.getProblems().totalProblemsReported();
            context.logger.info("");
            context.logger.info(String.format(
                    "%s %s encountered while building the effective settings (use -e to see details)",
                    totalProblems, (totalProblems == 1) ? "problem was" : "problems were"));

            if (context.invokerRequest.options().showErrors().orElse(false)) {
                for (BuilderProblem problem :
                        settingsResult.getProblems().problems().toList()) {
                    context.logger.warn(problem.getMessage() + " @ " + problem.getLocation());
                }
            }
            context.logger.info("");
        }
        return () -> {
            context.installationSettingsPath = null;
            context.projectSettingsPath = null;
            context.userSettingsPath = null;
            context.effectiveSettings = null;
            context.interactive = true;
            context.localRepositoryPath = null;
        };
    }