Introduction

This is intended to be a drop-in replacement for vim-ruby. I wrote it because the original vim-ruby is known for having many accuracy and performance issues related to syntax highlighting and indentation. After perusing the code for the original plugin, I decided that a complete rewrite was necessary.

In addition to regular Ruby files (*.rb), this plugin also supports eRuby (*.erb). If you want support for Ruby Signature files (*.rbs), check out my vim-rbs plugin.

Installation

This is a standard Vim plugin which can be installed using your plugin manager of choice. If you do not already have a plugin manager, I recommend vim-plug.

Configuration

g:ruby_simple_indent

The default indentation style used by this plugin is the one most commonly found in the Ruby community, which allows for "hanging" or "floating" indentation. Some examples:

x = if y
      5
    else
      10
    end

x = begin
      h["foo"]
    rescue KeyError
      "Not Found"
    end

x = case y
    when :foo
      5
    when :bar
      10
    else
      1
    end

x = [:foo, :bar,
     :baz, :qux]

x = 5 + 10 +
    15 + 20 -
    5 * 3

x = y.foo
     .bar
     .baz

For those who prefer a more traditional indentation style or who desire slightly faster highlighting and indentation, set g:ruby_simple_indent to 1. The above examples will now be indented thus:

x = if y
  5
else
  10
end

x = begin
  h["foo"]
rescue KeyError
  "Not Found"
end

x = case y
when :foo
  5
when :bar
  10
else
  1
end

x = [:foo, :bar,
  :baz, :qux]

# OR

x = [
  :foo, :bar,
  :baz, :qux
]

x = 5 + 10 +
  15 + 20 -
  5 * 3

# OR

x =
  5 + 10 +
  15 + 20 -
  5 * 3

x = y.foo
  .bar
  .baz

# OR

x = y
  .foo
  .bar
  .baz

g:eruby_extensions

A dictionary of filetype extensions is used to determine which filetype to use when loading ERB files. For example, opening a file named foo.html.erb will load HTML as the filetype with ERB syntax added on top.

The default recognized extensions are as follows:

.html => html
.turbo_stream => html
.js => javascript
.json => json
.xml => xml
.yml => yaml
.txt => text
.md => markdown

Each extension maps to the name of the filetype that you want to load for that extension.

To add or overwrite entries in the dictionary, set g:eruby_extensions to a dictionary with the entries that you want to inject. For example, the following would allow the plugin to recognize *.js files as JSX instead of JavaScript:

let g:eruby_extensions = { "js": "javascriptreact" }

If no subtype is specified in the file name itself (e.g., foo.erb), the value of g:eruby_default_subtype is used as the subtype.

g:eruby_default_subtype

Determines the default subtype to use for ERB files when no subtype is specified in the file name itself (e.g., foo.erb).

The default value is html. Setting this to nothing (let g:eruby_default_subtype = "") will cause no subtype to be used.