1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
* Overview
Geiser is a generic Emacs/Scheme interaction mode, featuring an
enhanced REPL and a set of minor modes improving Emacs' basic scheme
major mode. The main functionalities provided are:
- Evaluation of forms in the namespace of the current module.
- Macro expansion.
- File/module loading.
- Namespace-aware identifier completion (including local bindings,
names visible in the current module, and module names).
- Autodoc: the echo area shows information about the signature of
the procedure/macro around point automatically.
- Jump to definition of identifier at point.
- Access to documentation (including docstrings when the
implementation provides it).
- Listings of identifiers exported by a given module.
- Listings of callers/callees of procedures.
- Rudimentary support for debugging (list of
evaluation/compilation error in an Emacs' compilation-mode
buffer).
* Supported scheme implementations
- Guile 1.10 (not released yet: use the latest git master branch).
- PLT Racket 5.0 or better.
* Installation
Geiser can be used either directly from its uninstalled source tree
or byte-compiled and installed after perfoming the standard
configure/make/make install dance.
*** In place
- Extract the tarball or clone the git repository anywhere in your
file system. Let's call that place <path-to-geiser>.
- In your .emacs:
(load-file "<path-to-geiser>/elisp/geiser.el")
*** Byte-compiled
- Create a build directory, `build', say:
$ cd <path-to-geiser>
$ mkdir build; cd build
- Configure and make:
$ ../configure && make
- Install it with:
$ make install
(you might need to get root access, depending on your installation
directory) and require 'geiser-install (not 'geiser, mind you) in
your emacs initialization file:
(require 'geiser-install)
You're ready to go!
* Basic configuration
The loading invocations above install all supported Scheme
implementations. You can list explicitly the ones that you want by
setting the variable `geiser-impl-installed-implementations' *before*
loading geiser.el. For instance:
(setq geiser-impl-installed-implementations '(racket guile))
On opening a scheme file, Geiser will try to guess its Scheme,
defaulting to the first in the list. Use `C-c C-s' to select the
implementation by hand (on a per file basis).
Check the geiser customization group for some options with:
M-x customize-group RET geiser RET
In particular, customize `geiser-repl-<impl>-binary' (in
geiser-repl), which should point to an executable in your path.
To start a REPL, M-x geiser.
*** Completion with company-mode
Geiser offers identifier and module name completion, bound to
M-TAB and M-` respectively. Only names visible in the current
module are offered.
While that is cool and all, things are even better: if you have
[[http://nschum.de/src/emacs/company-mode/][company-mode]] installed, Geiser's completion will use it. Just
require company-mode and, from then on, any new scheme buffer or
REPL will use it. If you didn't know about Nikolaj Schumacher's
awesome mode, check [[http://www.screentoaster.com/watch/stU0lSRERIR1pYRFVdXVlRVFFV/company_mode_for_gnu_emacs][this screencast]].
* Quick key reference
*** In Scheme buffers:
|---------------------+-------------------------------------------------|
| C-c C-z | Switch to REPL |
| C-u C-c C-z | Switch to REPL and current module |
| C-c C-s | Specify Scheme implementation for buffer |
|---------------------+-------------------------------------------------|
| M-. | Go to definition of identifier at point |
| M-, | Go back to where M-. was last invoked |
| C-c C-e m | Ask for a module and open its file |
|---------------------+-------------------------------------------------|
| C-M-x | Eval definition around point |
| C-c M-e | Eval definition around point and switch to REPL |
| C-x C-e | Eval sexp before point |
| C-c C-r | Eval region |
| C-c M-r | Eval region and switch to REPL |
|---------------------+-------------------------------------------------|
| C-c C-m x | Macro-expand definition around point |
| C-c C-m e | Macro-expand sexp before point |
| C-c C-m r | Marcro-expand region |
| C-u C-c C-m [x,e,r] | (With prefix, macro expansions are recursive) |
|---------------------+-------------------------------------------------|
| C-c C-k | Compile and load current file |
| C-c C-l | Load current file |
|---------------------+-------------------------------------------------|
| C-c C-d d | See documentation for identifier at point |
| C-c C-d m | See a list of a module's exported identifiers |
| C-c C-d a | Toggle autodoc mode |
|---------------------+-------------------------------------------------|
| C-c< | Show callers of procedure at point |
| C-c> | Show callees of procedure at point |
| C-c C-x f | See a generic's methods signatures |
|---------------------+-------------------------------------------------|
| M-TAB | Complete identifier at point |
| M-`, C-. | Complete module name at point |
| TAB | Complete identifier at point or indent |
| | (If `geiser-mode-smart-tab-p' is t) |
|---------------------+-------------------------------------------------|
*** In the REPL
|----------------+----------------------------------------------------|
| C-c C-z, C-c z | Start Scheme REPL (if it's not running) |
|----------------+----------------------------------------------------|
| M-. | Edit identifier at point |
| TAB, M-TAB | Complete identifier at point |
| M-`, C-. | Complete module name at point |
|----------------+----------------------------------------------------|
| M-p, M-n | Prompt history, matching current prefix |
|----------------+----------------------------------------------------|
| C-c C-k, C-c k | Nuke REPL: use it if the REPL becomes unresponsive |
|----------------+----------------------------------------------------|
| C-c C-m, C-c m | Set current module
| C-c C-l, C-c l | Load scheme file |
|----------------+----------------------------------------------------|
| C-c C-d, C-c d | See module documentation |
| C-c C-a, C-c a | Toggle autodoc mode |
|----------------+----------------------------------------------------|
*** In the documentation browser:
|------------+----------------------------------------------|
| n, f | Next page |
| p, b | Previous page |
| TAB, S-TAB | Next/previous link |
| k | Kill current page and go to previous or next |
| g, r | Refresh page |
| c | Clear browsing history |
| ., M-. | Edit identifier at point |
| z | Switch to REPL |
| q | Bury buffer |
|------------+----------------------------------------------|
*** In backtrace (evaluation/compile result) buffers:
- TAB, M-TAB for error navigation.
- q to bury buffer.
|
