3 Geiser is a generic Emacs/Scheme interaction mode, featuring an
4 enhanced REPL and a set of minor modes improving Emacs' basic scheme
5 major mode. The main functionalities provided are:
7 - Evaluation of forms in the namespace of the current module.
10 - Namespace-aware identifier completion (including local bindings,
11 names visible in the current module, and module names).
12 - Autodoc: the echo area shows information about the signature of
13 the procedure/macro around point automatically.
14 - Jump to definition of identifier at point.
15 - Access to documentation (including docstrings when the
16 implementation provides it).
17 - Listings of identifiers exported by a given module.
18 - Listings of callers/callees of procedures.
19 - Rudimentary support for debugging (list of
20 evaluation/compilation error in an Emacs' compilation-mode
22 - Support for inline images in schemes, such as Racket, that treat
23 them as first order values.
25 NOTE: if you're not in a hurry, [[http://www.nongnu.org/geiser/][Geiser's website]] contains a much
30 Geiser needs Emacs 24 or better, and at least one of the supported
31 scheme implementations:
33 - Guile 2.2 or better.
34 - Chicken 4.8.0 or better.
36 The following schemes are supported via an independent package,
37 installable from MELPA:
39 - MIT/GNU Scheme via [[https://gitlab.com/emacs-geiser/mit][geiser-mit]]
40 - Kawa via [[https://gitlab.com/emacs-geiser/kawa][geiser-kawa]]
41 - Stklos via [[https://gitlab.com/emacs-geiser/stklos][geiser-stklos]]
42 - Chibi 0.7.3 or better.
43 - Gambit 4.9.3 or better.
44 - Racket 6.0 or better.
49 The easiest way is to use MELPA, and just type =M-x package-install
50 RET geiser= inside emacs. The, if needed, install also the package
51 corresponding to your preferred scheme (~geiser-kawa~, ~geiser-mit~,
54 Geiser can be used either directly from its uninstalled source tree
55 or byte-compiled and installed after performing the standard
56 configure/make/make install dance. See the INSTALL file for more details.
59 These steps are necessary to fully support Chicken Scheme, but are
60 not required for any other scheme.
62 - Install the necessary support eggs:
64 $ chicken-install -s apropos chicken-doc srfi-18 srfi-1
66 - Update the Chicken documentation database:
68 $ cd `csi -R chicken.platform -p '(chicken-home)'`
69 $ curl https://3e8.org/pub/chicken-doc/chicken-doc-repo-5.tgz | sudo tar zx
73 These steps are necessary to fully support Chicken Scheme, but are
74 not required for any other scheme.
76 - Install the necessary support eggs:
79 $ chicken-install -s apropos chicken-doc
82 - Update the Chicken documentation database:
85 $ cd `csi -p '(chicken-home)'`
86 $ curl http://3e8.org/pub/chicken-doc/chicken-doc-repo.tgz | sudo tar zx
91 The loading invocations above install all supported Scheme
92 implementations. You can list explicitly the ones that you want by
93 setting the variable =geiser-active-implementations= *before* loading
94 geiser.el. For instance:
97 (setq geiser-active-implementations '(chicken guile))
100 On opening a scheme file, Geiser will try to guess its Scheme,
101 defaulting to the first in the list. Use =C-c C-s= to select the
102 implementation by hand (on a per file basis).
104 Check the geiser customization group for some options with:
107 M-x customize-group RET geiser RET
110 In particular, customize =geiser-<impl>-binary=, which should point
111 to an executable in your path.
113 To start a REPL, =M-x geiser=.
115 ** Completion with company-mode
117 Geiser offers identifier and module name completion, bound to
118 =M-TAB= and =M-`= respectively. Only names visible in the current
121 While that is cool and all, things are even better: if you have
122 [[http://company-mode.github.io/][company mode]] installed, Geiser's completion will use it. Just
123 require company-mode and, from then on, any new scheme buffer or
126 * Quick key reference
128 (See also [[file:///home/jao/usr/jao/geiser/web/geiser_5.html#Cheat-sheet][the manual]]'s cheat sheet)
130 ** In Scheme buffers:
132 |-------------+--------------------------------------------------|
133 | C-c C-s | Specify Scheme implementation for buffer |
134 | C-c C-z | Switch to REPL |
135 | C-c C-a | Switch to REPL and current module |
137 |-------------+--------------------------------------------------|
138 | M-. | Go to definition of identifier at point |
139 | M-, | Go back to where M-. was last invoked |
140 | C-c C-e m | Ask for a module and open its file |
141 | C-c C-e C-l | Add a given directory to Scheme's load path |
142 | C-c C-e [ | Toggle between () and [] for current form |
143 | c-c C-e \ | Insert λ |
145 |-------------+--------------------------------------------------|
146 | C-M-x | Eval definition around point |
147 | C-c C-c | Eval definition around point |
148 | C-c M-e | Eval definition around point and switch to REPL |
149 | C-x C-e | Eval sexp before point |
150 | C-c C-r | Eval region |
151 | C-c M-r | Eval region and switch to REPL |
152 | C-c C-b | Eval buffer |
153 | C-c M-b | Eval buffer and switch to REPL |
155 |-------------+--------------------------------------------------|
156 | C-c C-m x | Macro-expand definition around point |
157 | C-c C-m e | Macro-expand sexp before point |
158 | C-c C-m r | Macro-expand region |
160 |-------------+--------------------------------------------------|
161 | C-c C-k | Compile and load current buffer |
162 | C-c C-l | Load scheme file |
163 | C-u C-c C-k | Compile and load current buffer, restarting REPL |
165 |-------------+--------------------------------------------------|
166 | C-c C-d d | See documentation for identifier at point |
167 | C-c C-d s | See short documentation for identifier at point |
168 | C-c C-d i | Look up manual for identifier at point |
169 | C-c C-d m | See a list of a module's exported identifiers |
170 | C-c C-d a | Toggle autodoc mode |
172 |-------------+--------------------------------------------------|
173 | C-c < | Show callers of procedure at point |
174 | C-c > | Show callees of procedure at point |
176 |-------------+--------------------------------------------------|
177 | M-TAB | Complete identifier at point |
178 | M-`, C-. | Complete module name at point |
179 | TAB | Complete identifier at point or indent |
180 | | (If geiser-mode-smart-tab-p is t) |
181 |-------------+--------------------------------------------------|
185 |-------------+----------------------------------------------------|
186 | C-c C-z | Start Scheme REPL, or jump to previous buffer |
187 | C-c M-o | Clear scheme output |
188 | C-c C-q | Kill Scheme process |
189 | C-c C-l | Load scheme file |
190 | C-c C-k | Nuke REPL: use it if the REPL becomes unresponsive |
192 |-------------+----------------------------------------------------|
193 | M-. | Edit identifier at point |
194 | TAB, M-TAB | Complete identifier at point |
195 | M-`, C-. | Complete module name at point |
196 | M-p, M-n | Prompt history, matching current prefix |
198 |-------------+----------------------------------------------------|
200 | C-c [ | Toggle between () and [] for current form |
202 |-------------+----------------------------------------------------|
203 | C-c C-m | Set current module |
204 | C-c C-i | Import module into current namespace |
205 | C-c C-r | Add a given directory to scheme's load path |
207 |-------------+----------------------------------------------------|
208 | C-c C-d C-d | See documentation for symbol at point |
209 | C-c C-d C-m | See documentation for module |
210 | C-c C-d C-a | Toggle autodoc mode |
211 |-------------+----------------------------------------------------|
213 ** In the documentation browser:
215 |----------+----------------------------------------------|
217 | b | Previous page |
219 |----------+----------------------------------------------|
220 | TAB, n | Next link |
221 | S-TAB, p | Previous link |
223 | P | Previous section |
225 |----------+----------------------------------------------|
226 | k | Kill current page and go to previous or next |
227 | g, r | Refresh page |
228 | c | Clear browsing history |
230 |----------+----------------------------------------------|
231 | ., M-. | Edit identifier at point |
232 | z | Switch to REPL |
234 |----------+----------------------------------------------|
236 |----------+----------------------------------------------|
238 ** In backtrace (evaluation/compile result) buffers:
240 - =M-g n=, =M-g p=, =C-x `= for error navigation.
241 - =q= to bury buffer.