ProjectInfoAutoConfiguration Class — spring-boot Architecture

Source Code

core/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/info/ProjectInfoAutoConfiguration.java lines 52–116

@AutoConfiguration
@EnableConfigurationProperties(ProjectInfoProperties.class)
public final class ProjectInfoAutoConfiguration {

	private final ProjectInfoProperties properties;

	ProjectInfoAutoConfiguration(ProjectInfoProperties properties) {
		this.properties = properties;
	}

	@Conditional(GitResourceAvailableCondition.class)
	@ConditionalOnMissingBean
	@Bean
	GitProperties gitProperties() throws Exception {
		return new GitProperties(
				loadFrom(this.properties.getGit().getLocation(), "git", this.properties.getGit().getEncoding()));
	}

	@ConditionalOnResource(resources = "${spring.info.build.location:classpath:META-INF/build-info.properties}")
	@ConditionalOnMissingBean
	@Bean
	BuildProperties buildProperties() throws Exception {
		return new BuildProperties(
				loadFrom(this.properties.getBuild().getLocation(), "build", this.properties.getBuild().getEncoding()));
	}

	protected Properties loadFrom(Resource location, String prefix, Charset encoding) throws IOException {
		prefix = prefix.endsWith(".") ? prefix : prefix + ".";
		Properties source = loadSource(location, encoding);
		Properties target = new Properties();
		for (String key : source.stringPropertyNames()) {
			if (key.startsWith(prefix)) {
				target.put(key.substring(prefix.length()), source.get(key));
			}
		}
		return target;
	}

	private Properties loadSource(Resource location, @Nullable Charset encoding) throws IOException {
		if (encoding != null) {
			return PropertiesLoaderUtils.loadProperties(new EncodedResource(location, encoding));
		}
		return PropertiesLoaderUtils.loadProperties(location);
	}

	static class GitResourceAvailableCondition extends SpringBootCondition {

		@Override
		public ConditionOutcome getMatchOutcome(ConditionContext context, AnnotatedTypeMetadata metadata) {
			ResourceLoader loader = context.getResourceLoader();
			Environment environment = context.getEnvironment();
			String location = environment.getProperty("spring.info.git.location");
			if (location == null) {
				location = "classpath:git.properties";
			}
			ConditionMessage.Builder message = ConditionMessage.forCondition("GitResource");
			if (loader.getResource(location).exists()) {
				return ConditionOutcome.match(message.found("git info at").items(location));
			}
			return ConditionOutcome.noMatch(message.didNotFind("git info at").items(location));
		}

	}

}