in spring-boot-project/spring-boot-cli/src/main/java/org/springframework/boot/cli/command/core/HelpCommand.java [91:123]
public ExitStatus run(String... args) throws Exception {
if (args.length == 0) {
throw new NoHelpCommandArgumentsException();
}
String commandName = args[0];
for (Command command : this.commandRunner) {
if (command.getName().equals(commandName)) {
Log.info(this.commandRunner.getName() + command.getName() + " - " + command.getDescription());
Log.info("");
if (command.getUsageHelp() != null) {
Log.info("usage: " + this.commandRunner.getName() + command.getName() + " "
+ command.getUsageHelp());
Log.info("");
}
if (command.getHelp() != null) {
Log.info(command.getHelp());
}
Collection<HelpExample> examples = command.getExamples();
if (examples != null) {
Log.info((examples.size() != 1) ? "examples:" : "example:");
Log.info("");
for (HelpExample example : examples) {
Log.info(" " + example.getDescription() + ":");
Log.info(" $ " + example.getExample());
Log.info("");
}
Log.info("");
}
return ExitStatus.OK;
}
}
throw new NoSuchCommandException(commandName);
}