[英]How are the packages installed with 'package-install'(elpa) in Emacs loaded?
我已经在Emacs中使用elpa安装了一些软件包,但是在启动Emacs时如何加载它们?
package-install
is a part of package.el
-- which You can see with describe-function
. package-install
是package.el
的一部分-您可以通过describe-function
查看。 From package.el
documentation: 从package.el
文档中:
;; At activation time we will set up the load-path and the info path,
;; and we will load the package's autoloads. If a package's
;; dependencies are not available, we will not activate that package.
So in every package there's a file 所以在每个包装中都有一个文件
NAME-autoloads.el
and this file is loaded at start up. 并在启动时加载该文件。
The whole package is contained under the package-user-dir
: 整个软件包都包含在package-user-dir
:
(setq package-user-dir "~/.emacs.d/site-lisp/package-install")
(require 'package)
Each package also contains NAME-pkg.el
with package version and description. 每个软件包还包含带有软件包版本和描述的NAME-pkg.el
。 For example here're files related to tabbar
package: 比如我这里还有文件相关tabbar
包:
package-install # that's my package-user-dir
└── tabbar-2.0.1 # each package dir is in the separate dir
├── tabbar-autoloads.el # this file is loaded at start up
├── tabbar.el # the package itself. In this case it is just a single file
└── tabbar-pkg.el # information about the package for package managment
To quote the manual: 39.1.1 Summary: Sequence of Actions at Startup : 引用该手册: 39.1.1摘要:启动时的操作顺序 :
15. If package-enable-at-startup is non-nil, it calls the function package-initialize to activate any optional Emacs Lisp package that has been installed. 15.如果package-enable-at-startup为非nil,它将调用函数package-initialize激活任何已安装的可选Emacs Lisp软件包。
package-initialize
is then calls package-activate
which in turn calls package-activate-1
which ends with loading NAME-autoload.el
: 然后, package-initialize
调用package-activate
,后者依次调用package-activate-1
,最后以加载NAME-autoload.el
结束:
(load (expand-file-name (concat name "-autoloads") pkg-dir) nil t)
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