Created
November 27, 2022 00:23
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Kotlin: Parsing CLI options easily using ENUMs
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private inline fun <reified T : OptionEnum> tryParseEnumOption(enumArgumentDefault: T, arg: String): T? { | |
val optionIntro = "--${enumArgumentDefault.optionName}" | |
if (!arg.startsWith(optionIntro)) | |
return null | |
if (arg == optionIntro || arg == optionIntro + "=" + enumArgumentDefault.optionValue) | |
return enumArgumentDefault | |
val valueStr = arg.substringAfter(optionIntro).removePrefix("=") | |
val enumConstants = T::class.java.enumConstants | |
return enumConstants.firstOrNull { it.optionName == valueStr } | |
?: throw CrucherConfigException("Unknown value for ${enumArgumentDefault.optionName}: $arg Try one of ${enumConstants.map { it.optionValue }}") | |
} |
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