docs(editorconfig): add editorconfig.txt

runtime/doc/editorconfig.txt

@@ -0,0 +1,89 @@
+*editorconfig.txt*  Nvim
+
+
+                            NVIM REFERENCE MANUAL
+
+
+EditorConfig integration                                        *editorconfig*
+
+Nvim natively supports EditorConfig. When a file is opened, Nvim searches
+upward through all of the parent directories of that file looking for
+".editorconfig" files. Each of these is parsed and any properties that match
+the opened file are applied.
+
+For more information on EditorConfig, see https://editorconfig.org/.
+
+                                                       *g:editorconfig_enable*
+EditorConfig integration can be disabled by adding >lua
+
+    vim.g.editorconfig_enable = false
+<
+to the user's |init.lua| file (or the Vimscript equivalent to |init.vim|).
+
+                                                              *b:editorconfig*
+When Nvim finds a valid .editorconfig file it will store the applied
+properties in the buffer variable |b:editorconfig|.
+
+                                                     *editorconfig-properties*
+The following properties are supported by default:
+
+                                                           *editorconfig_root*
+root                    If "true", then stop searching for .editorconfig files
+                        in parent directories. This property must be at the
+                        top-level of the .editorconfig file (i.e. it must not
+                        be within a glob section).
+
+                                                        *editorconfig_charset*
+charset                 One of "utf-8", "utf-8-bom", "latin1", "utf-16be", or
+                        "utf-16le". Sets the 'fileencoding' and 'bomb'
+                        options.
+
+                                                    *editorconfig_end_of_line*
+end_of_line             One of "lf", "crlf", or "cr". These correspond to
+                        setting 'fileformat' to "unix", "dos", or "mac",
+                        respectively.
+
+                                                   *editorconfig_indent_style*
+indent_style            One of "tab" or "space". Sets the 'expandtab' option.
+
+                                                    *editorconfig_indent_size*
+indent_size             A number indicating the size of a single indent.
+                        Alternatively, use the value "tab" to use the value of
+                        the tab_width property. Sets the 'shiftwidth' and
+                        'softtabstop'.
+
+                                           *editorconfig_insert_final_newline*
+insert_final_newline    "true" or "false" to ensure the file always has a
+                        trailing newline as its last byte. Sets the
+                        'fixendofline' and 'endofline' options.
+
+                                                *editorconfig_max_line_length*
+max_line_length         A number indicating the maximum length of a single
+                        line. Sets the 'textwidth' option.
+
+                                                      *editorconfig_tab_width*
+tab_width               The display size of a single tab character. Sets the
+                        'tabstop' option.
+
+                                       *editorconfig_trim_trailing_whitespace*
+trim_trailing_whitespace
+                        When "true", trailing whitespace is automatically
+                        removed when the buffer is written.
+
+                                              *editorconfig-custom-properties*
+New properties can be added by adding a new entry to the "properties" table.
+The table key is a property name and the value is a callback function which
+accepts the number of the buffer to be modified, the value of the property
+in the .editorconfig file, and (optionally) a table containing all of the
+other properties and their values (useful for properties which depend on other
+properties). The value is always a string and must be coerced if necessary.
+Example: >lua
+
+    require('editorconfig').properties.foo = function(bufnr, val, opts)
+      if opts.charset and opts.charset ~= "utf-8" then
+        error("foo can only be set when charset is utf-8", 0)
+      end
+      vim.b[bufnr].foo = val
+    end
+<
+ vim:tw=78:ts=8:noet:ft=help:norl:

runtime/doc/news.txt

@@ -51,7 +51,7 @@ NEW FEATURES                                                    *news-features*
 The following new APIs or features were added.
 
 • EditorConfig support is now builtin. This is enabled by default and happens
-  automatically. To disable it, users should add >vim
+  automatically. To disable it, users should add >lua
 
     vim.g.editorconfig_enable = false
 <