SyntaxTree gem can format your Ruby code and I think it's pretty good at that! Despite not having many configuration options, it does have a plugin system for people who want to change a thing or two in its behavior.

There are 2 common ways to align arguments in a multiline method call:

• align them to the first argument
• use fixed indentation

SyntaxTree uses both, depending on whether you use parentheses or not:

with_parens(
  "lorem ipsum",
  "dolor sit amet",
  "consectetur adipiscing elit"
)

without_parens "lorem ipsum",
               "dolor sit amet",
               "consectetur adipiscing elit"

Parens-less syntax is often used for DSLs, which is probably why it gets this special treatment.

This plugin will remove this exception and make all indentation fixed:

with_this_plugin "lorem ipsum",
  "dolor sit amet",
  "consectetur adipiscing elit"

Install the gem and add to the application's Gemfile by executing:

$ bundle add syntax_tree-no_alignment

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install syntax_tree-no_alignment

Example:

$ stree write --plugins=no_alignment lib/**/*.rb

Bug reports and pull requests are welcome on GitHub at https://github.com/spect88/syntax_tree-no_alignment.

The gem is available as open source under the terms of the MIT License.