config - 包含 ${HOME}/.app/someconfig.conf 中的配置

Question

我需要将一些属性文件包含到我的类型安全配置中，例如

include ${user.HOME}"/.app/db-test.conf"

但是解析器提示:

com.typesafe.config.ConfigException$Parse: dev/application.conf: 47: include keyword is not followed by a quoted string, but by: '${'user.HOME'}'
com.typesafe.config.ConfigException$Parse: dev/application.conf: 47: include keyword is not followed by a quoted string, but by: '${'user.HOME'}'
    at com.typesafe.config.impl.Parser$ParseContext.parseError(Parser.java:329)
    at com.typesafe.config.impl.Parser$ParseContext.parseError(Parser.java:325)
    at com.typesafe.config.impl.Parser$ParseContext.parseInclude(Parser.java:574)
    at com.typesafe.config.impl.Parser$ParseContext.parseObject(Parser.java:624)
    at com.typesafe.config.impl.Parser$ParseContext.parseValue(Parser.java:408)
    at com.typesafe.config.impl.Parser$ParseContext.parseObject(Parser.java:657)
    at com.typesafe.config.impl.Parser$ParseContext.parse(Parser.java:832)
    at com.typesafe.config.impl.Parser.parse(Parser.java:34)

如何在 include 语句中使用系统属性/环境变量？

Answer 1

您可以在加载配置的代码中手动执行此操作吗？

Config baseConfig = ConfigFactory.load();
// Probably want error checking here.
Config testConfig = ConfigFactory.parseFile(
    new File(System.getenv("HOME") + "/.app/db-test.conf"));
// You may need to change your resolution order, depending on what you're doing in your 
// default config.
testConfig.resolve();
Config finalConfig = baseConfig.withFallback(testConfig);