Exec runs a command and returns its exit code:
如果你在两年前问一个硅谷投资人，AI最核心的竞争壁垒是什么，答案几乎是一致的：算力。谁有更多的GPU，谁就有更强的模型，谁就赢了。
。业内人士推荐快连下载-Letsvpn下载作为进阶阅读
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.
TOML config file (~/.config/pixels/config.toml)