The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.
At the heart of BuildKit is LLB (Low-Level Build definition). Think of it as the LLVM IR of build systems. LLB is a binary protocol (protobuf) that describes a DAG of filesystem operations: run a command, copy files, mount a filesystem. It’s content-addressable, which means identical operations produce identical hashes, enabling aggressive caching.
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「這些科技不可能取代真正深入的語言研究，」他說。「你會說英文、也能讀英文書，並不代表你不需要在大學修英國文學。」他的話讓身為語言學人的我感到一點安慰。雖然那本字典已經不在了，但書架上讓讓‑保羅·薩特（Jean‑Paul Sartre）、弗朗茨·法農（Frantz Fanon ）和 艾梅·塞澤爾（Aimé Césaire ）的泛黃書本安穩放著的位置，暫時依然無可取代。