Various configurations to ensure newlines are preserved in minified Javascript files. Fork it and add another language/framework/compressor combination!

brunch_uglify.coffee

# Brunch - http://brunch.io/
#
# Using uglify-js-brunch - https://github.com/brunch/uglify-js-brunch
#
# Use the following settings in your Brunch configuration file

exports.config =
  plugins:
    uglify:
      output:
        beautify: true
        indent_level: 0

codekit

Codekit - http://incident57.com/codekit/

Use the following settings in CodeKit's Preferences:

    Indentiation: 0 spaces
    Beautify: on

google_closure_compiler.sh

# Google Closure Compiler
#
# The only way to get Closure Compiler to include newlines is to use the PRETTY_PRINT option,
# but there's no way to supress indentation. The only workaround seems to be removing the
# indentation manually.
#
# Below is an example using the sed command to remove the indentation.

java -jar compiler.jar --formatting PRETTY_PRINT [script file path] | sed 's/^ *//'

grunt.js

// Grunt - http://gruntjs.com/
//
// Using grunt-contrib-uglify - https://npmjs.org/package/grunt-contrib-uglify
//
// Set the following uglify.options in your Gruntfile.js

module.exports = function(grunt) {
  
  grunt.initConfig({
    uglify: {
      options: {
        beautify: {
          beautify: true,
          indent_level: 0
        }    
      }
    }
  });
  
};

node_minify.js

// Node-minify https://npmjs.org/package/node-minify
// 
// Use one of the following set of options when calling compressor.minify

new compressor.minify({
  type: 'uglifyjs',
  options: ['--beautify "indent-level=0"']
});

new compressor.minify({
  type: 'yui-js',
  options: ['--line-break 0']
});

rails_3_asset_pipeline_uglifier.rb

# Rails 3 asset pipeline - http://rubyonrails.org/
#
# Add the following to your config/environments/production.rb

# Only run when Uglifier is available (i.e. the :assets bundler group)
if defined? Uglifier
  config.assets.js_compressor = Uglifier.new(
    output: {
      # Add new lines
      beautify: true,
      # Don't add indentation
      indent_level: 0
    }
  )
end

sinatra_asset_pack_uglify.rb

# Sinatra AssetPack - https://github.com/rstacruz/sinatra-assetpack
#
# Add the following to your assets configure block

js_compression :uglify,
  output: {
    # Add new lines
    beautify: true,
    # Don't add indentation
    indent_level: 0
  }

uglify.js

// UglifyJS 2 node library - https://github.com/mishoo/UglifyJS2
// 
// Use the following options when calling UglifyJS.minify

var UglifyJS = require("uglify-js");

var result = UglifyJS.minify("[script file path]", {
  output: {
    beautify: true,
    indent_level: 0
  }
});

console.log(result.code);

uglify_cmd_line.sh

# UglifyJS 2 cmd line tool - http://nodejs.org/ https://github.com/mishoo/UglifyJS2
# 
# Use the following command line options with the uglifyjs command line tool

uglifyjs [script file path] --beautify "indent-level=0"

yui_compressor.sh

# YUI Compressor - http://yui.github.com/yuicompressor/
# 
# Use the following command line options with the YUI compressor line tool

java -jar yuicompressor.jar --line-break 0 [script file path]