425 lines
12 KiB
Plaintext
425 lines
12 KiB
Plaintext
@node Emacs Interface
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@section Emacs Interface
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@cindex Emacs
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GNU Guix comes with a visual user interface for GNU@tie{}Emacs, known
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as ``guix.el''. It can be used for routine package management tasks,
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pretty much like the @command{guix package} command (@pxref{Invoking
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guix package}). Specifically, ``guix.el'' makes it easy to:
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@itemize
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@item browse and display packages and generations;
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@item search, install, upgrade and remove packages;
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@item display packages from previous generations;
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@item do some other useful things.
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@end itemize
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@menu
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* Initial Setup: Emacs Initial Setup. Preparing @file{~/.emacs}.
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* Usage: Emacs Usage. Using the interface.
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* Configuration: Emacs Configuration. Configuring the interface.
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@end menu
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@node Emacs Initial Setup
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@subsection Initial Setup
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To be able to use ``guix.el'', you need to install the following
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packages:
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@itemize
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@item
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@uref{http://www.gnu.org/software/emacs/, GNU Emacs}, version 24.3 or
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later;
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@item
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@uref{http://nongnu.org/geiser/, Geiser}, version 0.3 or later: it is
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used for interacting with the Guile process.
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@end itemize
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When it is done, add the following into your init file (@pxref{Init
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File,,, emacs, The GNU Emacs Manual}):
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@example
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(require 'guix-init nil t)
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@end example
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However there is a chance that @code{load-path} of your Emacs does not
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contain a directory with ``guix.el'' (usually it is
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@file{/usr/share/emacs/site-lisp/}). In that case you need to add it
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before requiring (@pxref{Lisp Libraries,,, emacs, The GNU Emacs
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Manual}):
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@example
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(add-to-list 'load-path "/path/to/directory-with-guix.el")
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(require 'guix-init)
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@end example
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Do not worry about the efficiency of that @code{require} thing. It will
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not load the whole ``guix.el'' package, it will just autoload the main
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interactive commands (@pxref{Autoload,,, elisp, The GNU Emacs Lisp
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Reference Manual}).
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@node Emacs Usage
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@subsection Usage
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Once ``guix.el'' has been successfully configured, you should be able to
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use commands for displaying packages and generations. This information
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can be displayed in a ``list'' or ``info'' buffer.
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@menu
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* Commands: Emacs Commands. @kbd{M-x guix-@dots{}}
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* General information: Emacs General info. Common for both interfaces.
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* ``List'' buffer: Emacs List buffer. List-like interface.
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* ``Info'' buffer: Emacs Info buffer. Help-like interface.
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@end menu
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@node Emacs Commands
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@subsubsection Commands
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All commands for displaying packages and generations use the current
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profile, which can be changed with
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@kbd{M-x@tie{}guix-set-current-profile}. Alternatively, if you call any
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of these commands with prefix argument (@kbd{C-u}), you will be prompted
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for a profile just for that command.
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Commands for displaying packages:
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@table @kbd
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@item M-x guix-all-available-packages
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@itemx M-x guix-newest-available-packages
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Display all/newest available packages.
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@item M-x guix-installed-packages
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Display all installed packages.
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@item M-x guix-obsolete-packages
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Display obsolete packages (the packages that are installed in a profile
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but cannot be found among available packages).
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@item M-x guix-search-by-name
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Display package(s) with the specified name.
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@item M-x guix-search-by-regexp
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Search for packages by a specified regexp. By default ``name'',
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``synopsis'' and ``description'' of the packages will be searched. This
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can be changed by modifying @code{guix-search-params} variable.
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@end table
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By default, these commands display each output on a separate line. If
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you prefer to see a list of packages---i.e., a list with a package per
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line, use the following setting:
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@example
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(setq guix-package-list-type 'package)
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@end example
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Commands for displaying generations:
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@table @kbd
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@item M-x guix-generations
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List all the generations.
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@item M-x guix-last-generations
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List the @var{N} last generations. You will be prompted for the number
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of generations.
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@item M-x guix-generations-by-time
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List generations matching time period. You will be prompted for the
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period using Org mode time prompt based on Emacs calendar (@pxref{The
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date/time prompt,,, org, The Org Manual}).
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@end table
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You can also invoke the @command{guix pull} command (@pxref{Invoking
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guix pull}) from Emacs using:
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@table @kbd
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@item M-x guix-pull
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With @kbd{C-u}, make it verbose.
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@end table
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Once @command{guix pull} has succeeded, the Guix REPL is restared. This
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allows you to keep using the Emacs interface with the updated Guix.
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@node Emacs General info
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@subsubsection General information
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The following keys are available for both ``list'' and ``info'' types of
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buffers:
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@table @kbd
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@item l
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@itemx r
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Go backward/forward by the history of the displayed results (this
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history is similar to the history of the Emacs @code{help-mode} or
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@code{Info-mode}).
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@item g
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Revert current buffer: update information about the displayed
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packages/generations and redisplay it.
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@item R
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Redisplay current buffer (without updating information).
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@item C-c C-z
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Go to the Guix REPL (@pxref{The REPL,,, geiser, Geiser User Manual}).
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@item h
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@itemx ?
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Describe current mode to see all available bindings.
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@end table
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@emph{Hint:} If you need several ``list'' or ``info'' buffers, you can
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simlpy @kbd{M-x clone-buffer} them, and each buffer will have its own
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history.
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@emph{Warning:} Name/version pairs cannot be used to identify packages
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(because a name is not necessarily unique), so ``guix.el'' uses special
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identifiers that live only during a guile session, so if the Guix REPL
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was restarted, you may want to revert ``list'' buffer (by pressing
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@kbd{g}).
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@node Emacs List buffer
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@subsubsection ``List'' buffer
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An interface of a ``list'' buffer is similar to the interface provided
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by ``package.el'' (@pxref{Package Menu,,, emacs, The GNU Emacs Manual}).
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Default key bindings available for both ``package-list'' and
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``generation-list'' buffers:
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@table @kbd
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@item m
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Mark the current entry.
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@item M
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Mark all entries.
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@item u
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Unmark the current entry (with prefix, unmark all entries).
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@item @key{DEL}
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Unmark backward.
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@item S
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Sort entries by a specified column.
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@end table
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A ``package-list'' buffer additionally provides the following bindings:
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@table @kbd
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@item @key{RET}
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Describe marked packages (display available information in a
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``package-info'' buffer).
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@item i
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Mark the current package for installation.
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@item d
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Mark the current package for deletion.
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@item U
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Mark the current package for upgrading.
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@item ^
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Mark all obsolete packages for upgrading.
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@item x
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Execute actions on the marked packages.
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@end table
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A ``generation-list'' buffer additionally provides the following
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bindings:
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@table @kbd
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@item @key{RET}
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List packages installed in the current generation.
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@item i
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Describe marked generations (display available information in a
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``generation-info'' buffer).
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@item s
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Switch profile to the current generation.
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@item d
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Mark the current generation for deletion (with prefix, mark all
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generations).
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@item x
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Execute actions on the marked generations---i.e., delete generations.
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@item e
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Run Ediff (@pxref{Top,,, ediff, The Ediff Manual}) on package outputs
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installed in the 2 marked generations. With prefix argument, run Ediff
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on manifests of the marked generations.
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@item D
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@itemx =
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Run Diff (@pxref{Diff Mode,,, emacs, The GNU Emacs Manual}) on package
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outputs installed in the 2 marked generations. With prefix argument,
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run Diff on manifests of the marked generations.
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@item +
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List package outputs added to the latest marked generation comparing
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with another marked generation.
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@item -
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List package outputs removed from the latest marked generation comparing
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with another marked generation.
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@end table
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@node Emacs Info buffer
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@subsubsection ``Info'' buffer
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The interface of an ``info'' buffer is similar to the interface of
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@code{help-mode} (@pxref{Help Mode,,, emacs, The GNU Emacs Manual}).
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``Info'' buffer contains some buttons (as usual you may use @key{TAB} /
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@kbd{S-@key{TAB}} to move between buttons---@pxref{Mouse References,,,
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emacs, The GNU Emacs Manual}) which can be used to:
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@itemize @bullet
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@item (in a ``package-info'' buffer)
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@itemize @minus
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@item install/remove a package;
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@item jump to a package location;
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@item browse home page of a package;
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@item describe packages from ``Inputs'' fields.
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@end itemize
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@item (in a ``generation-info'' buffer)
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@itemize @minus
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@item remove a generation;
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@item switch to a generation;
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@item list packages installed in a generation;
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@item jump to a generation directory.
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@end itemize
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@end itemize
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@node Emacs Configuration
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@subsection Configuration
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There are many variables you can modify to change the appearance or
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behavior of Emacs user interface. Some of these variables are described
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in this section. Also you can use Custom Interface (@pxref{Easy
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Customization,,, emacs, The GNU Emacs Manual}) to explore/set variables
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(not all) and faces.
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@menu
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* Guile and Build Options: Emacs Build Options. Specifying how packages are built.
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* Buffer Names: Emacs Buffer Names. Names of Guix buffers.
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* Keymaps: Emacs Keymaps. Configuring key bindings.
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* Appearance: Emacs Appearance. Settings for visual appearance.
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@end menu
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@node Emacs Build Options
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@subsubsection Guile and Build Options
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@table @code
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@item guix-guile-program
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If you have some special needs for starting a Guile process, you may set
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this variable, for example:
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@example
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(setq guix-guile-program '("/bin/guile" "--no-auto-compile"))
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@end example
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@item guix-use-substitutes
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Has the same meaning as @code{--no-substitutes} option (@pxref{Invoking
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guix build}).
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@item guix-dry-run
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Has the same meaning as @code{--dry-run} option (@pxref{Invoking guix
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build}).
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@end table
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@node Emacs Buffer Names
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@subsubsection Buffer Names
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Default names of ``guix.el'' buffers (``*Guix@tie{}@dots{}*'') may be
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changed with the following variables:
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@table @code
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@item guix-package-list-buffer-name
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@item guix-output-list-buffer-name
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@item guix-generation-list-buffer-name
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@item guix-package-info-buffer-name
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@item guix-output-info-buffer-name
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@item guix-generation-info-buffer-name
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@item guix-repl-buffer-name
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@item guix-internal-repl-buffer-name
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@end table
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By default, the name of a profile is also displayed in a ``list'' or
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``info'' buffer name. To change this behavior, use
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@code{guix-buffer-name-function} variable.
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For example, if you want to display all types of results in a single
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buffer (in such case you will probably use a history (@kbd{l}/@kbd{r})
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extensively), you may do it like this:
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@example
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(let ((name "Guix Universal"))
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(setq
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guix-package-list-buffer-name name
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guix-output-list-buffer-name name
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guix-generation-list-buffer-name name
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guix-package-info-buffer-name name
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guix-output-info-buffer-name name
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guix-generation-info-buffer-name name
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guix-buffer-name-function #'guix-buffer-name-simple))
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@end example
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@node Emacs Keymaps
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@subsubsection Keymaps
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If you want to change default key bindings, use the following keymaps
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(@pxref{Init Rebinding,,, emacs, The GNU Emacs Manual}):
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@table @code
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@item guix-list-mode-map
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Parent keymap with general keys for ``list'' buffers.
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@item guix-package-list-mode-map
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Keymap with specific keys for ``package-list'' buffers.
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@item guix-output-list-mode-map
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Keymap with specific keys for ``output-list'' buffers.
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@item guix-generation-list-mode-map
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Keymap with specific keys for ``generation-list'' buffers.
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@item guix-info-mode-map
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Parent keymap with general keys for ``info'' buffers.
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@item guix-package-info-mode-map
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Keymap with specific keys for ``package-info'' buffers.
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@item guix-output-info-mode-map
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Keymap with specific keys for ``output-info'' buffers.
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@item guix-generation-info-mode-map
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Keymap with specific keys for ``generation-info'' buffers.
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@end table
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@node Emacs Appearance
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@subsubsection Appearance
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You can change almost any aspect of ``list'' / ``info'' buffers using
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the following variables:
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@table @code
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@item guix-list-column-format
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@itemx guix-list-column-titles
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@itemx guix-list-column-value-methods
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Specify the columns, their names, what and how is displayed in ``list''
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buffers.
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@item guix-info-displayed-params
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@itemx guix-info-insert-methods
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@itemx guix-info-ignore-empty-vals
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@itemx guix-info-param-title-format
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@itemx guix-info-multiline-prefix
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@itemx guix-info-indent
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@itemx guix-info-fill-column
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@itemx guix-info-delimiter
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Various settings for ``info'' buffers.
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@end table
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