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	$ guix gc -R /gnu/store/@dots{}-coreutils-8.23	$ guix gc -R /gnu/store/@dots{}-coreutils-8.23
	Here the output shows three columns next to store items. The first column, labeled ``total'', shows the size in mebibytes (MiB) of the closure of the store item---that is, its own size plus the size of all its dependencies. The next column, labeled ``self'', shows the size of the item itself. The last column shows the ratio of the size of the item itself to the space occupied by all the items listed here.	这里的输出在存储项旁边显示了三列。第一列标记为“总计”，显示存储项闭包的大小（以 MiB 为单位）——即其自身的大小加上所有依赖项的大小。下一列标记为“自身”，显示该项本身的大小。最后一列显示该项自身的大小与此处列出的所有项所占空间的比例。
	In this example, we see that the closure of Coreutils weighs in at 79@tie{}MiB, most of which is taken by libc and GCC's run-time support libraries. (That libc and GCC's libraries represent a large fraction of the closure is not a problem @i{per se} because they are always available on the system anyway.)	在这个示例中，我们看到 Coreutils 的闭包大小为 79@tie{}MiB，其中大部分由 libc 和 GCC 的运行时支持库占据。（libc 和 GCC 的库占据闭包的大部分并不是问题 @i{per se}，因为它们在系统上总是可用的。）
	Since the command also accepts store file names, assessing the size of a build result is straightforward:	由于该命令还接受存储文件名，因此评估构建结果的大小非常简单：
	guix size $(guix system build config.scm)	guix size $(guix system build config.scm)
	When the package(s) passed to @command{guix size} are available in the store@footnote{More precisely, @command{guix size} looks for the @emph{ungrafted} variant of the given package(s), as returned by @code{guix build @var{package} --no-grafts}. @xref{Security Updates}, for information on grafts.}, @command{guix size} queries the daemon to determine its dependencies, and measures its size in the store, similar to @command{du -ms --apparent-size} (@pxref{du invocation,,, coreutils, GNU Coreutils}).	当传递给 @command{guix size} 的包在存储中可用时@footnote{更准确地说，@command{guix size} 查找给定包的 @emph{未嫁接} 变体，返回 @code{guix build @var{package} --no-grafts}。有关嫁接的信息，请参见 @xref{Security Updates}。}, @command{guix size} 查询守护进程以确定其依赖关系，并测量其在存储中的大小，类似于 @command{du -ms --apparent-size} (@pxref{du invocation,,, coreutils, GNU Coreutils})。
	When the given packages are @emph{not} in the store, @command{guix size} reports information based on the available substitutes (@pxref{Substitutes}). This makes it possible to profile the disk usage of store items that are not even on disk, only available remotely.	当给定的包 @emph{不} 在存储中时，@command{guix size} 根据可用的替代品报告信息 (@pxref{Substitutes})。这使得能够分析那些甚至不在磁盘上、仅在远程可用的存储项目的磁盘使用情况。
	You can also specify several package names:	您还可以指定多个包名称：
	$ guix size coreutils grep sed bash store item total self /gnu/store/@dots{}-coreutils-8.24 77.8 13.8 13.4% /gnu/store/@dots{}-grep-2.22 73.1 0.8 0.8% /gnu/store/@dots{}-bash-4.3.42 72.3 4.7 4.6% /gnu/store/@dots{}-readline-6.3 67.6 1.2 1.2% @dots{} total: 102.3 MiB	$ guix size coreutils grep sed bash 存储项目总计自身 /gnu/store/@dots{}-coreutils-8.24 77.8 13.8 13.4% /gnu/store/@dots{}-grep-2.22 73.1 0.8 0.8% /gnu/store/@dots{}-bash-4.3.42 72.3 4.7 4.6% /gnu/store/@dots{}-readline-6.3 67.6 1.2 1.2% @dots{} 总计: 102.3 MiB
	In this example we see that the combination of the four packages takes 102.3@tie{}MiB in total, which is much less than the sum of each closure since they have a lot of dependencies in common.	在这个示例中，我们看到这四个包的组合总共占用 102.3@tie{}MiB，这远低于每个闭包的总和，因为它们有很多共同的依赖关系。
	When looking at the profile returned by @command{guix size}, you may find yourself wondering why a given package shows up in the profile at all. To understand it, you can use @command{guix graph --path -t references} to display the shortest path between the two packages (@pxref{Invoking guix graph}).	当查看 @command{guix size} 返回的配置文件时，您可能会想知道为什么某个给定的包会出现在配置文件中。要理解这一点，您可以使用 @command{guix graph --path -t references} 来显示两个包之间的最短路径 (@pxref{Invoking guix graph})。
	The available options are:	可用选项包括：
	Use substitute information from @var{urls}. @xref{client-substitute-urls, the same option for @code{guix build}}.	使用来自 @var{urls} 的替代信息。 @xref{client-substitute-urls, @code{guix build} 的相同选项}。
	--sort=@var{key}	--sort=@var{key}
	Sort lines according to @var{key}, one of the following options:	根据 @var{key} 对行进行排序，以下是可选项之一：
	self	self
	the size of each item (the default);	每个项目的大小（默认）；
	the total size of the item's closure.	项目闭包的总大小。
	--map-file=@var{file}	--map-file=@var{file}
	Write a graphical map of disk usage in PNG format to @var{file}.	将磁盘使用情况的图形地图以 PNG 格式写入 @var{file}。
	For the example above, the map looks like this:	对于上面的示例，地图看起来是这样的：
	@image{images/coreutils-size-map,5in,, map of Coreutils disk usage produced by @command{guix size}}	@image{images/coreutils-size-map,5in,, 由 @command{guix size} 生成的 Coreutils 磁盘使用情况地图}
	This option requires that @uref{https://wingolog.org/software/guile-charting/, Guile-Charting} be installed and visible in Guile's module search path. When that is not the case, @command{guix size} fails as it tries to load it.	此选项要求安装 @uref{https://wingolog.org/software/guile-charting/, Guile-Charting} 并在 Guile 的模块搜索路径中可见。当不满足此条件时，@command{guix size} 会失败，因为它尝试加载它。
	Consider packages for @var{system}---e.g., @code{x86_64-linux}.	考虑 @var{system} 的软件包——例如，@code{x86_64-linux}。
	Invoking @command{guix graph}	调用 @command{guix graph}
	DAG	DAG
	guix graph	guix graph
	Packages and their dependencies form a @dfn{graph}, specifically a directed acyclic graph (DAG). It can quickly become difficult to have a mental model of the package DAG, so the @command{guix graph} command provides a visual representation of the DAG@. By default, @command{guix graph} emits a DAG representation in the input format of @uref{https://www.graphviz.org/, Graphviz}, so its output can be passed directly to the @command{dot} command of Graphviz. It can also emit an HTML page with embedded JavaScript code to display a ``chord diagram'' in a Web browser, using the @uref{https://d3js.org/, d3.js} library, or emit Cypher queries to construct a graph in a graph database supporting the @uref{https://www.opencypher.org/, openCypher} query language. With @option{--path}, it simply displays the shortest path between two packages. The general syntax is:	软件包及其依赖关系形成一个 @dfn{图}，具体来说是一个有向无环图（DAG）。它可能会迅速变得难以对软件包 DAG 形成心理模型，因此 @command{guix graph} 命令提供了 DAG 的可视化表示。默认情况下，@command{guix graph} 以 @uref{https://www.graphviz.org/, Graphviz} 的输入格式输出 DAG 表示，因此其输出可以直接传递给 Graphviz 的 @command{dot} 命令。它还可以生成一个嵌入 JavaScript 代码的 HTML 页面，以在 Web 浏览器中显示“和弦图”，使用 @uref{https://d3js.org/, d3.js} 库，或者生成 Cypher 查询以在支持 @uref{https://www.opencypher.org/, openCypher} 查询语言的图形数据库中构建图。使用 @option{--path}，它仅显示两个软件包之间的最短路径。一般语法是：
	guix graph @var{options} @var{package}@dots{}	guix graph @var{options} @var{package}@dots{}
	For example, the following command generates a PDF file representing the package DAG for the GNU@tie{}Core Utilities, showing its build-time dependencies:	例如，以下命令生成一个 PDF 文件，表示 GNU@tie{}Core Utilities 的软件包 DAG，显示其构建时依赖关系：
	guix graph coreutils \| dot -Tpdf > dag.pdf	guix graph coreutils \| dot -Tpdf > dag.pdf

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