spacemacs/layers/+lang/clojure/README.org

#+TITLE: Clojure layer

#+TAGS: dsl|layer|lisp|programming

[[file:img/clojure.png]] [[file:img/cider.png]]

* Table of Contents                     :TOC_5_gh:noexport:
- [[#description][Description]]
  - [[#features][Features:]]
- [[#install][Install]]
  - [[#layer][Layer]]
  - [[#pretty-symbols][Pretty Symbols]]
  - [[#enabling-sayid-or-clj-refactor][Enabling sayid or clj-refactor]]
  - [[#enabling-automatic-linting][Enabling Automatic Linting]]
    - [[#enable-clj-kondo-linter][Enable clj-kondo linter]]
    - [[#enable-joker-linter][Enable joker linter]]
    - [[#enable-squiggly-linter][Enable Squiggly linter]]
    - [[#enable-multiple-linters][Enable multiple linters]]
  - [[#starting-clojure-manually-outside-of-emacs][Starting Clojure manually (outside of Emacs)]]
    - [[#quick-start-with-boot][Quick Start with boot]]
    - [[#quick-start-with-lein][Quick Start with lein]]
    - [[#more-details][More details]]
- [[#usage][Usage]]
  - [[#cheatsheet][Cheatsheet]]
  - [[#structuraly-safe-editing][Structuraly safe editing]]
- [[#key-bindings][Key bindings]]
  - [[#working-with-clojure-files-barfage-slurpage--more][Working with clojure files (barfage, slurpage & more)]]
  - [[#leader][Leader]]
    - [[#documentation][Documentation]]
    - [[#evaluation][Evaluation]]
    - [[#goto][Goto]]
    - [[#repl][REPL]]
    - [[#tests][Tests]]
    - [[#toggles][Toggles]]
    - [[#debugging][Debugging]]
    - [[#refactoring][Refactoring]]
    - [[#reformatting][Reformatting]]
    - [[#profiling][Profiling]]
  - [[#cider-buffers][CIDER Buffers]]
    - [[#cider-repl-mode][cider-repl-mode]]
    - [[#stacktrace-mode][stacktrace-mode]]
    - [[#inspector-mode][inspector-mode]]
    - [[#test-report-mode][test-report-mode]]
  - [[#sayid-buffers][Sayid Buffers]]
    - [[#sayid-mode][sayid-mode]]
    - [[#sayid-traced-mode][sayid-traced-mode]]
    - [[#sayid-pprint][sayid-pprint]]
- [[#development-notes][Development Notes]]
  - [[#indentation][Indentation]]

* Description
This layer adds support for [[https://clojure.org/][Clojure]] language using [[https://github.com/clojure-emacs/cider][CIDER]].

** Features:
- REPL via [[https://github.com/clojure-emacs/cider][CIDER]]
- Code formatting via [[https://github.com/clojure-emacs/cider][CIDER]] using [[https://github.com/weavejester/cljfmt][Cljfmt]]
- Refactoring via [[https://github.com/clojure-emacs/clj-refactor.el][clj-refactor]]
- Linting via [[https://github.com/clojure-emacs/squiggly-clojure][squiggly-clojure]], [[https://github.com/borkdude/clj-kondo][clj-kondo]] or [[https://github.com/candid82/joker][joker]]
- Aligning of code forms via [[https://github.com/clojure-emacs/clojure-mode][clojure-mode]]
- Debugging with [[https://github.com/clojure-emacs/sayid][sayid]]
- Clojure cheatsheet
- Structuraly safe editing using optional [[https://github.com/luxbock/evil-cleverparens][evil-cleverparens]]

* Install
** Layer
To use this configuration layer, add it to your =~/.spacemacs=. You will need to
add =clojure= to the existing =dotspacemacs-configuration-layers= list in this
file.

** 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:

#+BEGIN_SRC emacs-lisp
  (setq clojure-enable-fancify-symbols t)
#+END_SRC

Or set this variable when loading the configuration layer:

#+BEGIN_SRC emacs-lisp
  (setq-default dotspacemacs-configuration-layers
  '((clojure :variables clojure-enable-fancify-symbols t)))
#+END_SRC

** Enabling sayid or clj-refactor
The packages sayid (Clojure debugger) and clj-refactor (automatic refactorings)
are disabled by default. 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:

#+BEGIN_SRC emacs-lisp
  ;; before
  dotspacemacs-configuration-layers
  '(...
    clojure
    )

  ;; after
  dotspacemacs-configuration-layers
  '(...
    (clojure :variables
             clojure-enable-sayid t
             clojure-enable-clj-refactor t)
    )
#+END_SRC

Enabling either of these packages will cause extra nREPL middleware to be
injected when jacking in CIDER.

** Enabling Automatic Linting
[[https://github.com/borkdude/clj-kondo][clj-kondo]], [[https://github.com/candid82/joker][joker]] and [[https://github.com/clojure-emacs/squiggly-clojure][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 [[https://github.com/borkdude/clj-kondo][clj-kondo]] in combination with [[https://github.com/candid82/joker][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 [[https://github.com/borkdude/clj-kondo][clj-kondo]] binary
installed on the system PATH that =spacemacs.env= includes. Please read the
[[https://github.com/borkdude/clj-kondo/blob/master/doc/install.md][clj-kondo binary installation instructions]]

Enable the clj-kondo automatic linter in Spacemacs by adding a =:variables= option
to your Spacemacs configuration:

#+BEGIN_SRC emacs-lisp
  ;; 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)
    )
#+END_SRC

*** Enable joker linter
This linter is based on static syntax checking and requires the [[https://github.com/candid82/joker][joker]] binary
installed on the system PATH that =spacemacs.env= includes. Please read the
[[https://github.com/candid82/joker#installation][joker binary installation instructions]]

Enable the joker automatic linter in Spacemacs by adding a =:variables= option
to your Spacemacs configuration:

#+BEGIN_SRC emacs-lisp
  ;; 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)
    )
#+END_SRC

*** Enable Squiggly linter
[[https://github.com/clojure-emacs/squiggly-clojure][squiggly-clojure]] uses [[https://github.com/jonase/eastwood][Eastwood]] and [[https://github.com/jonase/kibit][Kibit]] for linting. Please install these projects
before configuring Spacemacs with =squiggly=.

Make sure to read the [[https://github.com/clojure-emacs/squiggly-clojure#warnings][squiggly-clojure warnings section]].

Please read the section on [[https://github.com/clojure-emacs/squiggly-clojure#dependencies-in-clojure][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:

#+BEGIN_SRC emacs-lisp
  ;; 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)
      )

#+END_SRC

Troubleshooting: please read [[https://github.com/clojure-emacs/squiggly-clojure#debugging-and-bug-reporting][debugging and bug reporting]] and try to reproduce using the [[https://github.com/clojure-emacs/squiggly-clojure/tree/master/sample-project][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:

#+BEGIN_SRC emacs-lisp
  ;; 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))
    )
#+END_SRC

** Starting Clojure manually (outside of Emacs)
CIDER communicates with your Clojure process through nREPL, and for CIDER to
function correctly extra nREPL middleware needs to be present
(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:

  #+BEGIN_SRC clojure
    (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)
  #+END_SRC

*** 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:

  #+BEGIN_SRC clojure
    {: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
                          ]}}}
  #+END_SRC

*** More details
More info regarding installation of nREPL middleware can be found here:
- CIDER: [[https://cider.readthedocs.io/en/latest/installation/][CIDER installation (official docs)]]
- clj-refactor: [[https://github.com/clojure-emacs/refactor-nrepl][refactor-nrepl]]

* Usage
** Cheatsheet
This layers installs the [[https://github.com/clojure-emacs/clojure-cheatsheet][clojure-cheatsheet]] package which embeds this useful
[[https://clojure.org/api/cheatsheet][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
This layer adds support for =evil-cleverparens= which allows to safely edit
lisp code by keeping the s-expressions balanced.

By default this mode is not activated. You can turn it on locally on the active
buffer with ~SPC m T s~ (=s= for safe).

To turn it on automatically for all =clojure= buffers call the following
function in your =dotspacemacs/user-config= function:

#+BEGIN_SRC emacs-lisp
  (spacemacs/toggle-evil-safe-lisp-structural-editing-on-register-hook-clojure-mode)
#+END_SRC

or to enable it for all supported modes:

#+BEGIN_SRC emacs-lisp
  (spacemacs/toggle-evil-safe-lisp-structural-editing-on-register-hooks)
#+END_SRC

When enabled the symbol =🆂= should be displayed 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
[[https://github.com/syl20bnr/spacemacs/blob/master/doc/DOCUMENTATION.org#lisp-key-bindings][DOCUMENTATION.org]]. In general, use ~SPC k~ to interact with the lisp-state.

** Leader
*** 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 |

*** Evaluation

| Key binding | Description                                               |
|-------------+-----------------------------------------------------------|
| ~SPC m e ;~ | eval sexp and show result as comment                      |
| ~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 r~ | eval region                                               |
| ~SPC m e m~ | cider macroexpand 1                                       |
| ~SPC m e M~ | cider macroexpand all                                     |
| ~SPC m e p~ | print last sexp (clojure interaction mode only)           |
| ~SPC m e P~ | eval last sexp and pretty print result in separate buffer |
| ~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                             |

*** REPL

| Key binding   | Description                                                                    |
|---------------+--------------------------------------------------------------------------------|
| ~SPC m ,~     | handle shortcut (cider-repl-handle-shortcut)                                   |
| ~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~   | connect to REPL (cider-connect) or clear repl buffer (cider-repl-clear-buffer) |
| ~SPC m s C~   | clear REPL (cider-find-and-clear-repl-output)                                  |
| ~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 j c~ | start Clojure REPL (=cider-jack-in-clj=)                                       |
| ~SPC m s j f~ | start Clojure REPL (=cider-jack-in-clj&cljs=)                                  |
| ~SPC m s j s~ | start ClojureScript REPL (=cider-jack-in-cljs=)                                |
| ~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 q~   | kill REPL (cider-quit)                                                         |
| ~SPC m s o~   | switch to other repl instance (cider-repl-switch-to-other)                     |
| ~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 s s~   | switch to REPL or jump to last file or last clj buffer from repl (cider-repl)  |
| ~SPC m s u~   | require Clojure utils into current namespace - i.e. functions =doc= =source=   |
| ~SPC m s x~   | refresh REPL                                                                   |
| ~SPC m s X~   | restart REPL                                                                   |

*** 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

| 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 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 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 f b~ or ~SPC m =~ | reformat current buffer |
| ~SPC m f l~              | realign current form    |
|                          |                         |

*** 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 [[https://github.com/clojure-emacs/cider/blob/master/doc/modules/ROOT/pages/indent_spec.adoc][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.