Abstract:Package managers are legion. Every programming language and operating system has its own solution, each with subtly different semantics for dependency resolution. This fragmentation prevents multilingual projects from expressing precise dependencies across language ecosystems; it leaves external system and hardware dependencies implicit and unversioned; it obscures security vulnerabilities that lie in the full dependency graph. We present the \textit{Package Calculus}, a formalism for dependency resolution that unifies the core semantics of diverse package managers. Through a series of formal reductions, we show how this core is expressive enough to model the diversity that real-world package managers employ in their dependency expression languages. By using the Package Calculus as the intermediate representation of dependencies, we enable translation between distinct package managers and resolution across ecosystems.
"We're basically turning history into habitat, and as far as we know, no-one has attempted anything quite like this before."
，这一点在爱思助手下载最新版本中也有详细论述
3014251410http://paper.people.com.cn/rmrb/pc/content/202602/27/content_30142514.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/27/content_30142514.html11921 让创新药离患者更近（实干显担当 同心启新程·代表委员履职故事）
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再写代码：从插入/冒泡开始，逐步挑战快排/归并