void printHeader()

in src/main/java/org/apache/maven/plugins/artifact/buildinfo/BuildInfoWriter.java [70:119]
46 lines of code
11 McCabe index (conditional complexity)

    void printHeader(MavenProject project, MavenProject aggregate, boolean reproducible) {
        p.println("# https://reproducible-builds.org/docs/jvm/");
        p.println("buildinfo.version=1.0-SNAPSHOT");
        p.println();
        p.println("name=" + project.getName());
        p.println("group-id=" + project.getGroupId());
        p.println("artifact-id=" + project.getArtifactId());
        p.println("version=" + project.getVersion());
        p.println();
        printSourceInformation(project);
        p.println();
        p.println("# build instructions");
        p.println("build-tool=mvn");
        // p.println( "# optional build setup url, as plugin parameter" );
        p.println();
        if (reproducible) {
            p.println("# build environment information (simplified for reproducibility)");
            p.println("java.version=" + extractJavaMajorVersion(System.getProperty("java.version")));
            String ls = System.getProperty("line.separator");
            p.println("os.name=" + ("\n".equals(ls) ? "Unix" : "Windows"));
        } else {
            p.println("# effective build environment information");
            p.println("java.version=" + System.getProperty("java.version"));
            p.println("java.vendor=" + System.getProperty("java.vendor"));
            p.println("os.name=" + System.getProperty("os.name"));
        }
        p.println();
        p.println("# Maven rebuild instructions and effective environment");
        if (!reproducible) {
            p.println("mvn.version=" + rtInformation.getMavenVersion());
        }
        if ((project.getPrerequisites() != null) && (project.getPrerequisites().getMaven() != null)) {
            // TODO wrong algorithm, should reuse algorithm written in versions-maven-plugin
            p.println("mvn.minimum.version=" + project.getPrerequisites().getMaven());
        }
        if (toolchain != null) {
            String javaVersion = JdkToolchainUtil.getJavaVersion(toolchain);
            if (reproducible) {
                javaVersion = extractJavaMajorVersion(javaVersion);
            }
            p.println("mvn.toolchain.jdk=" + javaVersion);
        }

        if (!mono && (aggregate != null)) {
            p.println("mvn.aggregate.artifact-id=" + aggregate.getArtifactId());
        }

        p.println();
        p.println("# " + (mono ? "" : "aggregated ") + "output");
    }