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clojure-vim / clojure.vim

Clojure syntax highlighting and indentation for Vim and Neovim.
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clojure clojure-development neovim syntax syntax-highlighting vim vim-indent vim-plugin vim-syntax

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Clojure.vim

Clojure syntax highlighting for Vim and Neovim, including:

Installation

These files are included in both Vim and Neovim. However if you would like the latest changes just install this repository like any other plugin.

Make sure that the following options are set in your vimrc so that all features are enabled:

syntax on
filetype plugin indent on

Configuration

Folding

Setting g:clojure_fold to 1 will enable the folding of Clojure code. Any list, vector or map that extends over more than one line can be folded using the standard Vim fold commands.

(Note that this option will not work with scripts that redefine the bracket regions, such as rainbow parenphesis plugins.)

Syntax options

g:clojure_syntax_keywords

Syntax highlighting of public vars in clojure.core is provided by default, but additional symbols can be highlighted by adding them to the g:clojure_syntax_keywords variable.

let g:clojure_syntax_keywords = {
    \   'clojureMacro': ["defproject", "defcustom"],
    \   'clojureFunc': ["string/join", "string/replace"]
    \ }

(See s:clojure_syntax_keywords in the syntax script for a complete example.)

There is also a buffer-local variant of this variable (b:clojure_syntax_keywords) that is intended for use by plugin authors to highlight symbols dynamically.

By setting b:clojure_syntax_without_core_keywords, vars from clojure.core will not be highlighted by default. This is useful for namespaces that have set (:refer-clojure :only []).

g:clojure_discard_macro

Set this variable to 1 to enable highlighting of the "discard reader macro". Due to current limitations in Vim's syntax rules, this option won't highlight stacked discard macros (e.g. #_#_). This inconsitency is why this option is disabled by default.

Indent options

Clojure indentation differs somewhat from traditional Lisps, due in part to the use of square and curly brackets, and otherwise by community convention. These conventions are not universally followed, so the Clojure indent script offers a few configuration options.

(If the current Vim does not include searchpairpos(), the indent script falls back to normal 'lisp' indenting, and the following options are ignored.)

g:clojure_maxlines

Sets maximum scan distance of searchpairpos(). Larger values trade performance for correctness when dealing with very long forms. A value of 0 will scan without limits. The default is 300.

g:clojure_fuzzy_indent, g:clojure_fuzzy_indent_patterns, g:clojure_fuzzy_indent_blacklist

The 'lispwords' option is a list of comma-separated words that mark special forms whose subforms should be indented with two spaces.

For example:

(defn bad []
      "Incorrect indentation")

(defn good []
  "Correct indentation")

If you would like to specify 'lispwords' with a pattern instead, you can use the fuzzy indent feature:

" Default
let g:clojure_fuzzy_indent = 1
let g:clojure_fuzzy_indent_patterns = ['^with', '^def', '^let']
let g:clojure_fuzzy_indent_blacklist = ['-fn$', '\v^with-%(meta|out-str|loading-context)$']

g:clojure_fuzzy_indent_patterns and g:clojure_fuzzy_indent_blacklist are lists of patterns that will be matched against the unqualified symbol at the head of a list. This means that a pattern like "^foo" will match all these candidates: foobar, my.ns/foobar, and #'foobar.

Each candidate word is tested for special treatment in this order:

  1. Return true if word is literally in 'lispwords'
  2. Return false if word matches a pattern in g:clojure_fuzzy_indent_blacklist
  3. Return true if word matches a pattern in g:clojure_fuzzy_indent_patterns
  4. Return false and indent normally otherwise

g:clojure_special_indent_words

Some forms in Clojure are indented such that every subform is indented by only two spaces, regardless of 'lispwords'. If you have a custom construct that should be indented in this idiosyncratic fashion, you can add your symbols to the default list below.

" Default
let g:clojure_special_indent_words = 'deftype,defrecord,reify,proxy,extend-type,extend-protocol,letfn'

g:clojure_align_multiline_strings

Align subsequent lines in multi-line strings to the column after the opening quote, instead of the same column.

For example:

(def default
  "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
  eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut
  enim ad minim veniam, quis nostrud exercitation ullamco laboris
  nisi ut aliquip ex ea commodo consequat.")

(def aligned
  "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do
   eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut
   enim ad minim veniam, quis nostrud exercitation ullamco laboris
   nisi ut aliquip ex ea commodo consequat.")

g:clojure_align_subforms

By default, parenthesized compound forms that look like function calls and whose head subform is on its own line have subsequent subforms indented by two spaces relative to the opening paren:

(foo
  bar
  baz)

Setting this option to 1 changes this behaviour so that all subforms are aligned to the same column, emulating the default behaviour of clojure-mode.el:

(foo
 bar
 baz)

Contribute

Pull requests are welcome! Make sure to read the CONTRIBUTING.md for useful information.

Acknowledgements

Clojure.vim is a continuation of vim-clojure-static. Vim-clojure-static was created by Sung Pae. The original copies of the packaged runtime files came from Meikel Brandmeyer's VimClojure project with permission.

Thanks to Tim Pope for advice in #vim.

License

Clojure.vim is licensed under the Vim License for distribution with Vim.

See LICENSE for more details.