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@node Installation, The REPL, Introduction, Top
@chapter Installation
@menu
* Must needs::
* The quick and easy way::
* From the source's mouth::
* Friends::
@end menu
@node Must needs, The quick and easy way, Installation, Installation
@section Must needs
@cindex supported versions
@cindex versions supported
If Geiser came with any guarantees, you'd break all of them by not using
GNU Emacs @value{EMACS_VERSION} (or better: i regularly use it with a
recent Emacs snapshot) and at least one of the supported Schemes,
namely:
@itemize @bullet
@supimpl{Chez, http://www.scheme.com, 9.4,chez}
@supimpl{Chibi, http://synthcode.com/scheme/chibi, 0.7.3,chibi}
@supimpl{Chicken, http://call-cc.org, 4.8.0, chicken}
@supimpl{Gambit, http://gambitscheme.org/wiki/index.php/Main_Page, 4.9.3, gambit}
@supimpl{Gauche, http://practical-scheme.net/gauche/, 0.9.6, gauche}
@supimpl{Guile, http://www.gnu.org/software/guile, 2.2, guile}
@supimpl{GNU Kawa, http://www.gnu.org/software/kawa/index.html, 3.1, kawa}
@supimpl{MIT/GNU Scheme, https://www.gnu.org/software/mit-scheme, 9.0, mit}
@supimpl{Racket, http://www.racket-lang.org, 7.0, racket}
@supimpl{Stklos, https://stklos.net/, 1.50, stklos}
@end itemize
Since Geiser supports multiple REPLs, having all of them will just add
to the fun.
You'll also need Geiser itself. The quickest installation is via your
favourite implementation's ELPA packages (as of this writing, they're
all available in MELPA and (most of them) also in NonGNU ELPA, which
comes included with the batteries of Emacs 28 or better).
@node The quick and easy way, From the source's mouth, Must needs, Installation
@section The quick and easy way
@cindex quick install
@cindex ELPA
@cindex NonGNU ELPA
Did i mention that the easiest way of installing Geiser is using its
@uref{http://emacswiki.org/emacs/ELPA, ELPA} package? If you're using
Emacs 24, @uref{http://emacswiki.org/emacs/ELPA, ELPA} is already there;
for earlier versions, the page i just linked to twice will tell you
where to find the goodies.
ELPA packages live in repositories accessible via HTTP. You can find
Geiser's package in either
@uref{https://elpa.nongnu.org/nongnu/geiser.html, NonGNU ELPA} or, if
you like living on the bleeding edge, @uref{http://melpa.org/#/geiser,
MELPA} (directly from the git repo). To tell Emacs that an ELPA repo
exists, you add it to @code{package-archives}@footnote{If you're using
Emacs 28 or better, @code{package-archives} already comes with the
non-gnu archive preconfigured, so you're lucky in more than one way.}:
@example
(require 'package)
(add-to-list 'package-archives
'("nongnu" . "https://elpa.nongnu.org/nongnu/"))
(package-initialize)
@end example
And then installing your favourite Geiser is as easy as (if, say, you're
a MIT aficionado):
@example
M-x package-install RET geiser-mit RET
@end example
Rinse and repeat for each of the scheme implementations that you would
like to use. Some of them (e.g. Gambit or Chicken) have a bit of
additional setup, specific to them, so make sure you also check their
respective package documentation.
With that, you are pretty much all set up. See @ref{The REPL} to start
using Geiser.
@ifnotinfo
And, by the way, if you prefer to keep reading this manual within Emacs,
@kbd{C-h i m Geiser RET} will bring you to the info version of it that
you just installed!
@end ifnotinfo
@node From the source's mouth, Friends, The quick and easy way, Installation
@section Installing from source
All Geiser packages are ready to be used out of the box without much
more ado. For the sake of concreteness, let's assume you put its source
in the directory @file{~/lisp/geiser}. All you need to do is to add the
following line to your Emacs initialisation file (be it @file{~/.emacs},
@file{~/.emacs.d/init.el} or any of its moral equivalents):
@example
(add-to-list 'load-path "~/lisp/geiser/elisp")
@end example
and, if your, say, @code{geiser-gambit} checkout lives in
@file{~/lisp/geiser-mit} add to that:
@example
(add-to-list 'load-path "~/lisp/geiser-gambit")
@end example
The autoloads defined in those packages should be enough to start
scheming.
@node Friends, , From the source's mouth, Installation
@section Friends
Although Geiser does not need them, it plays well with (and is enhanced
by) the following Emacs packages:
@cindex ac-geiser
@cindex autocomplete
@cindex paredit
@cindex company
@cindex macrostep
@itemize @bullet
@item @uref{http://www.emacswiki.org/emacs/ParEdit, Paredit}.
@anchor{paredit}
Regardless of whether you use Geiser or not, you shouldn't be coding
in any Lisp dialect without the aid of Taylor Campbell's structured
editing mode.
@item @uref{http://company-mode.github.io/, Company}.
Nikolaj Schumacher's and Dmitry Gutov's @code{company-mode} provides a
generic front-end for completion engines (such as Geiser's), with pretty
and automatic completion lists.
@item @uref{https://github.com/nbfalcon/macrostep-geiser, macrostep-geiser}
provides support for in-buffer macro expansion, using the
@uref{https://github.com/joddie/macrostep, macrostep} package.
@item @uref{https://github.com/xiaohanyu/ac-geiser/, ac-geiser}
If you prefer @code{auto-complete-mode} to @code{company-mode}, Xiao
Hanyu's @code{ac-geiser}, which provides a Geiser plugin for the
popular @uref{https://www.emacswiki.org/emacs/AutoComplete, Emacs Auto
Completion Mode}, is the package for you. Like Geiser,
@code{ac-geiser} is available in MELPA, and also as an
@code{el-get} package.
@end itemize
@noindent
You just need to install and setup them as usual, for every package's
definition of usual. Geiser will notice their presence and react
accordingly.
@c Local Variables:
@c mode: texinfo
@c TeX-master: "geiser"
@c End:
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