This is the key insight: the build language is not baked into BuildKit. It’s a pluggable layer. You can write a frontend that reads a YAML spec, a TOML config, or a custom DSL, and BuildKit will execute it the same way it executes Dockerfiles.
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63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54
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* @param arr 数组，更多细节参见夫子
// 易错点3：必须先判断stack2.length0，再访问stack2.at(-1)（避免栈空时取到undefined）