SpringBoot Support for autoconfiguration of custom Mustache Formatter

Spring Boot currently autoconfigures the Mustache.Compiler like:

@Bean
@ConditionalOnMissingBean
public Mustache.Compiler mustacheCompiler(TemplateLoader mustacheTemplateLoader) {
    return Mustache.compiler().withLoader(mustacheTemplateLoader);
}

To register a custom formatter one has to provide the Mustache.Compiler bean him/herself like:

    @Bean
    public Mustache.Compiler mustacheCompiler(Mustache.TemplateLoader mustacheTemplateLoader) {
        return Mustache.compiler()
                .withLoader(mustacheTemplateLoader)
                .withFormatter(new Mustache.Formatter() {
                    public String format (Object value) {
                        if (value instanceof Date) return _fmt.format((Date)value);
                        else return String.valueOf(value);
                    }
                    protected DateFormat _fmt = new SimpleDateFormat("yyyy/MM/dd");
                });
    }

It would be nice if Spring Boot would recognize a Mustache.Formatter bean and auto configure them. See also: https://github.com/samskivert/jmustache#user-defined-object-formatting

Comment From: wilkinsona

Thanks for the suggestion. This duplicates part of https://github.com/spring-projects/spring-boot/issues/15566.