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.
3014248010http://paper.people.com.cn/rmrb/pc/content/202602/27/content_30142480.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/27/content_30142480.html11921 中央政治局委员 书记处书记 全国人大常委会 国务院 全国政协党组成员 最高人民法院 最高人民检察院党组书记向党中央和习近平总书记述职
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The committee said a mass screening programme for prostate cancer was likely to cause more harm than good.
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fosters community governance.