Add key bindings to refactor namespace forms for existing functions in CIDER. "ran" 'clojure-insert-ns-form "raN" 'clojure-insert-ns-form-at-point "run" 'clojure-update-ns
37 KiB
Clojure layer
- Description
- Install
- Usage
- Key bindings
- Development Notes
Description
This layer adds support for Clojure language using CIDER, providing Clojure REPL management and a full suite of tooling for Clojure development.
Features:
- REPL via CIDER
- Code formatting via CIDER using Cljfmt
- Refactoring via clj-refactor
- Aligning of code forms via clojure-mode
- Debugging with sayid
- Clojure cheatsheet
- Structuraly safe editing using optional evil-cleverparens
- Linting via clj-kondo (joker and squiggly-clojure also available)
Related layers
The following Spacemacs layers should also be added for a complete experience.
- auto-completion
- syntax-checking (provides flycheck for linter support)
Other optional features
- Refactoring via clj-refactor
- Debugging with sayid (beta)
References
Install
Spacemacs will prompt to install the Clojure layer automatically when opening a file ending in .clj
.cljs
, .cljc
or .edn
. Replying y
will download all the packages for the Clojure layer.
Restarting Spacemacs, SPC q r
, is recommended to ensure all changes are loaded.
Add the Clojure Layer manually
Edit the ~/.spacemacs
file and add the word clojure
to the existing
dotspacemacs-configuration-layers
list.
Pretty Symbols
Pretty symbols for anonymous functions, set literals and partial, like (λ [a]
(+ a 5))
, ƒ(+ % 5)
, ∈{2 4 6}
and Ƥ
.
To enable this feature, add the following snippet to the
dotspacemacs/user-config
section of your ~/.spacemacs
file:
(setq clojure-enable-fancify-symbols t)
Or set this variable when loading the configuration layer:
(setq-default dotspacemacs-configuration-layers
'((clojure :variables clojure-enable-fancify-symbols t)))
Enabling Automatic Linting
clj-kondo, joker and squiggly-clojure provide automated linting via flycheck
.
These packages are disabled by default as they require the relevant linter binaries
to be installed locally.
The recommended linter is to use clj-kondo in combination with joker. Together they catch the most issues while both running extremely quickly.
squiggly reloads your code on every change which gives unexpected results if
your code is not re-loadable. squiggly also requires org.clojure/core.typed
be
added to the development dependencies of your projects or build tool when using
cider-connect
.
Enable clj-kondo linter
This linter based on static syntax checking and requires the clj-kondo binary
installed on the system PATH that spacemacs.env
includes. Please read the
clj-kondo binary installation instructions
Enable the clj-kondo automatic linter in Spacemacs by adding a :variables
option
to your Spacemacs configuration:
;; Witout any variables your configuration would just include clojure
dotspacemacs-configuration-layers
'(...
clojure
)
;; to use clj-kondo as a linter, add this variable to the clojure layer
;; wrapping the clojure layer in a list
dotspacemacs-configuration-layers
'(...
(clojure :variables
clojure-enable-linters 'clj-kondo)
)
Enable joker linter
This linter is based on static syntax checking and requires the joker binary
installed on the system PATH that spacemacs.env
includes. Please read the
joker binary installation instructions
Enable the joker automatic linter in Spacemacs by adding a :variables
option
to your Spacemacs configuration:
;; Witout any variables your configuration would just include clojure
dotspacemacs-configuration-layers
'(...
clojure
)
;; to use joker as a linter, add this variable to the clojure layer
;; wrapping the clojure layer in a list
dotspacemacs-configuration-layers
'(...
(clojure :variables
clojure-enable-linters 'joker)
)
Enable Squiggly linter
squiggly-clojure uses Eastwood and Kibit for linting. Please install these projects
before configuring Spacemacs with squiggly
.
Make sure to read the squiggly-clojure warnings section.
Please read the section on squiggly dependencies if you are using cider-connect
Enable the squiggly (eastwood, kibit and core.typed) automatic linter in Spacemacs by adding a :variables
option to your Spacemacs configuration:
;; Without any variables your configuration would just include Clojure
dotspacemacs-configuration-layers
'(...
clojure
)
;; to use squiggly as a linter, add this variable to the clojure layer
;; wrapping the clojure layer in a list
dotspacemacs-configuration-layers
'(...
(clojure :variables
clojure-enable-linters 'squiggly)
)
Troubleshooting: please read debugging and bug reporting and try to reproduce using the sample project.
Enable multiple linters
You can choose to enable multiple linters and have them all run together. This gives you better linting coverage, as they don't catch all the same issues.
You will need to follow their individual install instructions first, to get all their necessary binaries and configs on the system PATH that spacemacs.env
includes. Please refer to their individual Enable … linter section respectively.
Once all the linters you want to enable are installed, you simply need to specify a list of them in the :variables
option to your Spacemacs configuration:
;; Witout any variables your configuration would just include clojure
dotspacemacs-configuration-layers
'(...
clojure
)
;; to enable multiple linters, say clj-kondo and joker, add a list variable to the clojure layer
;; listing each one in the order you want them running, wrapping the clojure layer in a list
dotspacemacs-configuration-layers
'(...
(clojure :variables
clojure-enable-linters '(clj-kondo joker))
)
Enable Clojure fancify Symbols
Fancify symbols re-writes your code and displays symbols for:
- function definitions with fn
(λ [a] (+ a 5))
and its syntax shortcutƒ(+ % 5)
- set literals
∈{2 4 6}
- partial functions
Ƥ
.
To enable this feature, add the following snippet to the
dotspacemacs/user-config
section of your ~/.spacemacs
file:
(setq clojure-enable-fancify-symbols t)
Or set this variable when loading the configuration layer:
(setq-default dotspacemacs-configuration-layers
'((clojure :variables clojure-enable-fancify-symbols t)))
Enabling sayid or clj-refactor
The packages sayid (Clojure debugger) and clj-refactor (automatic refactorings) are disabled by default. These packages are less active that the CIDER project and may cause issues when running CIDER.
To enable them, add a :variables
option when enabling the clojure
layer,
specifying clojure-enable-sayid
, or clojure-enable-clj-refactor
, or both.
In your Spacemacs configuration:
;; before
dotspacemacs-configuration-layers
'(...
clojure
)
;; after
dotspacemacs-configuration-layers
'(...
(clojure :variables
clojure-enable-sayid t
clojure-enable-clj-refactor t)
)
Enabling either of these packages will cause extra nREPL middleware to be injected when jacking in CIDER.
If you are experiencing issues when running a REPL, try disabling these packages first and restart Spacemacs to see if the error persists.
Usage
Read the key bindings section to see all the functionality available, or simply
use the ,
or SPC m
to open the which-key menu for the Clojure layer.
Starting a REPL from Spacemacs
Open a Clojure file (.clj
, .cljs
, .cljc
, .edn
) and start a Clojure REPL,
choosing the REPL session type (Clojure, ClojureScript or both Clojure & ClojureScript).
, '
and , s i
calls the sesman-start
command, a wrapper for all the
jack-in
and connect
commands. A prompt appears allowing you to choose the
type of REPL session required.
, s j
opens the cider-jack-in menu, providing commands to start specific REPL sessions,
it is the same as using the sesman-start
command described previously.
Using the universal constant, SPC u
before any of the previous commands enables editing
of the command that starts the REPL. This is useful if you want to add a deps.edn
alias
or add your own dependencies to inject. The command is edited in the mini-buffer
Once the REPL starts, a confirmation message is displayed in the mini-buffer.
The REPL buffer does not open automatically (Clojure is typically evaluated in
the source code buffer). , s a
will switch between REPL and source code buffers,
opening the REPL buffer if not already shown.
Troubleshooting
If the REPL does not start, SPC b m
opens the message buffer and should show errors.
Also check the REPL buffer, , s a
for error messages.
Remove optional features from the Clojure layer, specifically sayid and clj-refactor. Restart Emacs and confirm the issue still occurs.
Visit #cider channel on Clojurians Slack community for help with CIDER, and #spacemacs channel for Spacemacs specific help
Connecting to a Clojure REPL outside of Emacs
Start a REPL outside of Emacs that includes an nREPL server. The IP address and port the nREPL runs on should be printed.
, '_
or SPC m s i
displays the sesman prompt, select the connect command relevant
to the type of REPL you wish to start.
, s c
opens the cider-connect menu, providing key bindings for connecting too the
different REPL session types.
CIDER communicates with your Clojure process through nREPL and for CIDER to function correctly extra nREPL middleware is needed (cider/cider-nrepl). The same is true for clj-refactor (refactor-nrepl), and for sayid (com.billpiel/sayid).
When starting the Clojure process through cider (cider-jack-in
and friends)
this will be handled automatically, and so most users should be able to just run
SPC m s i
to connect to the CIDER REPL and skip the rest of this section.
If you are running an older version of CIDER (0.10 or older), or if you are starting the Clojure process yourself outside of Emacs, then you need to make sure the necessary dependencies are present, and the necessary nREPL middlewares are enabled.
Quick Start with boot
- Install
boot
2.8.2 or newer (see https://github.com/boot-clj/boot#user-content-install) -
Create a file
~/.boot/profile.boot
with the following content:(require 'boot.repl) (swap! boot.repl/*default-dependencies* conj ;; When running an older version of CIDER (pre 0.18), use the ;; version that best matches M-x cider-version. For versions since ;; 0.18.0 use whatever version is the most recent. '[cider/cider-nrepl "0.21.1"] ;; Only necessary when using clj-refactor '[refactor-nrepl "2.4.0"] ;; Only necessary when using sayid '[com.billpiel/sayid "0.0.17"]) (swap! boot.repl/*default-middleware* conj 'cider.nrepl/cider-middleware 'refactor-nrepl.middleware/wrap-refactor 'com.billpiel.sayid.nrepl-middleware/wrap-sayid)
Quick Start with lein
- Install
lein
version 2.9.0 or newer (see https://leiningen.org/#install) -
Create a file
~/.lein/profiles.clj
with the following content:{:repl {:plugins [;; When running an older version of CIDER (pre 0.18), use the ;; version that best matches M-x cider-version. For versions since ;; 0.18.0 use whatever version is the most recent. [cider/cider-nrepl "0.21.1"] ;; Only necessary when using clj-refactor [refactor-nrepl "2.4.0"] ;; Only necessary when using sayid [com.billpiel/sayid "0.0.17"]] :dependencies [[nrepl "0.4.5"]] :repl-options {:nrepl-middleware [refactor-nrepl.middleware/wrap-refactor ;; clj-refactor com.billpiel.sayid.nrepl-middleware/wrap-sayid ;; sayid ]}}}
More details
More info regarding installation of nREPL middleware can be found here:
- CIDER: CIDER installation (official docs)
- clj-refactor: refactor-nrepl
Managing REPL connections
Sesman is used for managing REPL connections when working simultaneously on multiple projects or have multiple connections opened for the same project
SPC m m i
provides information about the current REPL.
SPC m m b
shows information about all REPLs currently active.
SPC m m l
menu links files, directories and projects to an existing session.
See REPL connections in the key bindings section for all the commands.
Cheatsheet
This layers installs the clojure-cheatsheet package which embeds this useful cheatsheet into Emacs.
Type SPC m h c
to display the cheatsheet then type in some terms (space
separated) to narrow down the list. For example, try typing in sort map to see
some functions that deal with sorting maps.
Structuraly safe editing
The Clojure layer adds support for evil-cleverparens
which allows to safely edit
lisp code by keeping the s-expressions balanced.
SPC m T s
will toggle safe structured editing, off by default.
Enable safe structural editing for all clojure
buffers using the following
in the dotspacemacs/user-config
function of your .spacemacs file
(spacemacs/toggle-evil-safe-lisp-structural-editing-on-register-hook-clojure-mode)
Or enable safe structural editing for all supported modes:
(spacemacs/toggle-evil-safe-lisp-structural-editing-on-register-hooks)
When enabled the symbol 🆂
will display in the mode-line.
Key bindings
Working with clojure files (barfage, slurpage & more)
Spacemacs comes with a special lisp-state
for working with lisp code that
supports slurpage, barfage and more tools you'll likely want when working with
lisp.
As this state works the same for all files, the documentation is in global
DOCUMENTATION.org. In general, use SPC k
to interact with the lisp-state.
Leader
Shortcuts
Shortcut key bindings for regularly used commands.
Key binding | Description |
---|---|
SPC m ' |
start a REPL - prompted for REPL type (sesman-start) |
SPC m , |
command menu in REPL buffer (cider-repl-handle-shortcut) |
Managing REPL connections
Managing CIDER REPL connections and sessions
Key binding | Description |
---|---|
SPC m m b |
browse all REPL session (sesman-browser) |
SPC m m i |
current REPL information, SPC u for all sessions (sesman-info) |
SPC m m g |
go to most relevant REPL session (sesman-goto) |
SPC m m l b |
link buffer to REPL session (sesman-link-with-buffer) |
SPC m m l d |
link directory to REPL session (sesman-link-with-directory) |
SPC m m l p |
link project to REPL session (sesman-link-with-project) |
SPC m m l u |
unlink from REPL session (sesman-unlink) |
SPC m m S j |
connect as sibling to existing Clojure REPL |
SPC m m S s |
connect as sibling to existing ClojureScript REPL |
SPC m m s |
start a REPL - prompted for REPL type (sesman-start) |
SPC m m q q |
quit REPL session (sesman-quit) |
SPC m m q r |
restart REPL (sesman-restart) |
Documentation
Key binding | Description |
---|---|
SPC m h a |
cider apropos |
SPC m h c |
clojure cheatsheet |
SPC m h d |
cider clojuredocs |
SPC m h h |
cider doc |
SPC m h j |
cider javadoc |
SPC m h n |
cider browse namespace |
SPC m h N |
cider browse all namespaces |
SPC m h s |
cider-browse-spec |
SPC m h S |
cider-browse-spec-all |
Evaluation
Evaluate Clojure code in the source code buffer
Key binding | Description |
---|---|
SPC m e ; |
eval sexp and show result as comment |
SPC m e $ |
go to end of line and eval last sexp |
SPC m e b |
eval buffer |
SPC m e e |
eval last sexp |
SPC m e f |
eval function at point |
SPC m e i |
interrupt the current evaluation |
SPC m e l |
go to end of line and eval last sexp |
SPC m e m |
cider macroexpand 1 |
SPC m e M |
cider macroexpand all |
SPC m e n |
refresh namespace (cider-ns-refresh) |
SPC m e N |
reload namespace (cider-ns-reload), SPC u (cider-ns-reload-all) |
SPC m e p ; |
eval top-level sexp, pretty print result as a comment |
SPC m e p : |
eval last sexp, pretty print result as a comment |
SPC m e p f |
eval top-level sexp, pretty print result in separate buffer |
SPC m e p e |
eval last sexp, pretty print result in separate buffer |
SPC m e r |
eval region |
SPC m e u |
Undefine a symbol from the current namespace |
SPC m e v |
eval sexp around point |
SPC m e w |
eval last sexp and replace with result |
Goto
Key binding | Description |
---|---|
SPC m g b |
go back |
SPC m g C |
browse classpath |
SPC m g g |
goto var definition spacemacs/clj-find-var |
SPC m g e |
goto error |
SPC m g n |
goto namespace |
SPC m g r |
goto resource |
SPC m g s |
browse spec |
SPC m g S |
browse all specs |
Send code to REPL
Use these key bindings when working directly with a REPL buffer. Use the Evaluation key bindings when evaluating in source code buffer.
Key binding | Description |
---|---|
SPC m s a |
switch between REPL and last Clojure source code buffer (cider-repl) |
SPC m s b |
send and eval buffer in REPL |
SPC m s B |
send and eval buffer and switch to REPL in insert state |
SPC m s c j |
connect to a running Clojure REPL (cider-connect-clj) |
SPC m s c m |
connect to a running Clojure & ClojureScript REPL (cider-connect-clj&cljs) |
SPC m s c s |
connect to a running ClojureScript REPL (cider-connect-cljs) |
SPC m s e |
send and eval last sexp in REPL |
SPC m s E |
send and eval last sexp and switch to REPL in insert state |
SPC m s f |
send and eval function in REPL |
SPC m s F |
send and eval function and switch to REPL in insert state |
SPC m s i |
start a REPL - prompt for REPL type (sesman-start) |
SPC m s j j |
start Clojure REPL (cider-jack-in-clj ) |
SPC m s j m |
start Clojure REPL (cider-jack-in-clj&cljs ) |
SPC m s j s |
start ClojureScript REPL (cider-jack-in-cljs ) |
SPC m l |
clear REPL buffer (cider-repl-clear-buffer) |
SPC m L |
clear and switch to REPL buffer (cider-find-and-clear-repl-output) |
SPC m s n |
send and eval ns form in REPL |
SPC m s N |
send and eval ns form and switch to REPL in insert state |
SPC m s o |
switch to other repl instance (cider-repl-switch-to-other) |
SPC m s q n |
reload namespace in REPL (cider-ns-reload) |
SPC m s q N |
reload all namespace in REPL (cider-ns-reload-all) |
SPC m s q q |
quit REPL (cider-quit) |
SPC m s q r |
restart REPL (cider-restart) |
SPC m s r |
send and eval region in REPL |
SPC m s R |
send and eval region and switch to REPL in insert state |
SPC m e u |
require Clojure utils into current namespace - i.e. doc source |
SPC m s p |
print last sexp (clojure interaction mode only) |
Tests
Key binding | Description |
---|---|
SPC m t a |
run all tests in namespace |
SPC m t r |
re-run test failures for namespace |
SPC m t t |
run test at point |
Toggles
Key binding | Description |
---|---|
SPC m T e |
toggle englighten mode |
SPC m T f |
toggle REPL font-locking |
SPC m T i |
toggle indentation style |
SPC m T p |
toggle REPL pretty-printing |
SPC m T t |
toggle auto test mode |
Debugging
TODO: separate clojure-mode and sayid key bindings
Key binding | Description |
---|---|
SPC m d ! |
reload traces and clear sayid workspace |
SPC m d b |
instrument expression at point |
SPC m d c |
clear workspace trace log |
SPC m d e |
display last stacktrace |
SPC m d E |
one time display of value at cursor |
SPC m d f |
query form at point |
SPC m d h |
show sayid help (key bindings may not be accurate) |
SPC m d i |
inspect expression at point |
SPC m d r |
reload namespaces |
SPC m d s |
show what is currently traced |
SPC m d S |
show what is currently traced in current namespace |
SPC m d t b |
trace current file's namespace |
SPC m d t d |
disable existing trace on current function |
SPC m d t D |
disable existing trace on all functions |
SPC m d t e |
enable existing trace on current function |
SPC m d t E |
enable existing trace on all functions |
SPC m d t K |
remove all traces |
SPC m d t n |
create inner trace on function |
SPC m d t o |
create outer trace on function |
SPC m d t p |
trace namespaces by regex |
SPC m d t r |
remove trace on function |
SPC m d t y |
recursively trace every namespace in given dir |
SPC m d v |
inspect expression at point |
SPC m d V |
set the view |
SPC m d w |
open sayid workspace window |
SPC m d x |
clear workspace traces and log |
Refactoring
The following refactoring key bindings are enabled by default in clojure-mode:
Key binding | Description |
---|---|
SPC m r a n |
insert a namespace form at the beginning of the buffer |
SPC m r a N |
insert a namespace form at point |
SPC m r c i |
cycle between if and if-not forms |
SPC m r c p |
cycle privacy of defn and def forms |
SPC m r c ( |
convert coll to list |
SPC m r c ' |
convert coll to quoted list |
SPC m r c { |
convert coll to map |
SPC m r c # |
convert coll to set |
SPC m r c [ |
convert coll to vector |
SPC m r s n |
sort namespaces inside the ns form |
SPC m r t f |
rewrite the following form to use the -> (thread first) macro. |
SPC m r t l |
rewrite the following form to use the ->> (thread last) macro. |
SPC m r t h |
thread another form into the surrounding threading macro |
SPC m r u a |
unwind all steps of surrounding threading macro |
SPC m r u w |
unwind threading macro one step at a time |
The following refactorings require cljr-refactor to be enabled and generally depend on a connected CIDER session.
Key binding | Description |
---|---|
SPC m r ? |
describe refactoring |
SPC m r a d |
add declaration |
SPC m r a i |
add import to ns |
SPC m r a m |
add missing libspec |
SPC m r a p |
add project dependency |
SPC m r a r |
add require to ns |
SPC m r a u |
add use to ns |
SPC m r c : |
toggle between keyword and string |
SPC m r c n |
clean ns |
SPC m r d k |
destructure keys |
SPC m r e c |
extract constant |
SPC m r e d |
extract definition |
SPC m r e f |
extract function |
SPC m r e l |
expand let |
SPC m r f u |
find usages |
SPC m r f e |
create fn from example |
SPC m r h d |
hotload dependency |
SPC m r i l |
introduce let |
SPC m r i s |
inline symbol |
SPC m r m f |
move form |
SPC m r m l |
move to let |
SPC m r p c |
project clean |
SPC m r p f |
promote function |
SPC m r r d |
remove debug fns |
SPC m r r f |
rename file |
SPC m r r l |
remove let |
SPC m r r r |
remove unused requires |
SPC m r r s |
rename symbol |
SPC m r r u |
replace use |
SPC m r s n |
sort ns |
SPC m r s p |
sort project dependencies |
SPC m r s r |
stop referring |
SPC m r s c |
show changelog |
SPC m r u p |
update project dependencies |
Reformatting
Key binding | Description |
---|---|
SPC m = = |
reformat current buffer |
SPC m = e b |
reformat edn buffer |
SPC m = e e |
reformat edn last sexp |
SPC m = e r |
reformat edn region |
SPC m = f |
reformat current sexp |
SPC m = l |
realign current form |
SPC m = r |
realign current region |
Profiling
Key binding | Description |
---|---|
SPC m p + |
profile samples |
SPC m p c |
clear profile |
SPC m p n |
toggle profile ns |
SPC m p s |
profile summary |
SPC m p S |
summary for all |
SPC m p t |
toggle profile |
SPC m p v |
is variable profiled |
CIDER Buffers
In general, q
should always quit the popped up buffer.
cider-repl-mode
Key binding | Description |
---|---|
C-j |
next input |
C-k |
previous input |
stacktrace-mode
Key binding | Description |
---|---|
C-j |
next cause |
C-k |
previous cause |
TAB |
cycle current cause |
0 |
cycle all causes |
1 |
cycle cause 1 |
2 |
cycle cause 2 |
3 |
cycle cause 3 |
4 |
cycle cause 4 |
5 |
cycle cause 5 |
a |
toggle all |
c |
toggle clj |
d |
toggle duplicates |
J |
toggle java |
r |
toggle repl |
T |
toggle tooling |
inspector-mode
Key binding | Description |
---|---|
TAB |
next inspectable object |
Shift-TAB |
previous inspectable object |
RET |
inspect object |
L |
pop to the parent object |
n |
next page in paginated view |
N |
previous page in paginated view |
r |
refresh |
s |
set a new page size |
test-report-mode
Key binding | Description |
---|---|
C-j |
next result |
C-k |
previous result |
RET |
jump to test |
d |
ediff test result |
e |
show stacktrace |
r |
rerun failed tests |
t |
run test |
T |
run tests |
Sayid Buffers
sayid-mode
Key binding | Description |
---|---|
Shift-Backspace |
forward buffer state |
enter |
pop to function |
d |
def value to $s/* |
f |
query for calls to function |
F |
query to calls to function with modifier |
i |
show only this instance |
I |
show only this instance with modifier |
L or Backspace |
previous buffer state |
n |
jump to next call |
N |
jump to previous call |
P |
pretty print value |
C |
clear workspace trace log |
e |
generate instance expression and put in kill ring |
H |
display help (key bindings may not be accurate) |
w |
show full workspace trace |
C-s v |
toggle view |
C-s V |
set view |
sayid-traced-mode
Key binding | Description |
---|---|
backspace |
go back to trace overview |
enter |
drill into ns at point |
e |
enable trace |
E |
enable all traces |
d |
disable trace |
D |
disable all traces |
h |
display help (key bindings may not be accurate) |
i |
apply inner trace to function at point |
o |
apply outer trace to function at point |
r |
remove trace at point |
sayid-pprint
Key binding | Description |
---|---|
enter |
show path in minibuffer |
i |
enter child node |
o |
enter parent node |
n |
enter next sibling node |
p |
enter previous sibling node |
Development Notes
Indentation
With a Indentation spec functionality of Cider to read the custom indentation rules from the var's metadata, it is better for consistency reasons to not add the custom indentation rules to Spacemacs, but to add them to the metadata of those specific vars.