Easily switch between your two predefined themes for Sublime Text.

package.json

{
  "name": "themeswitch",
  "version": "0.0.1",
  "description": "Easily switch between your two predefined themes for Sublime Text.",
  "dependencies": {},
  "devDependencies": {
    "coffee-script": "^1.9.3",
    "json-format": "0.0.1"
  },
  "author": "Fatih Acet <fatih@fatihacet.com>"
}

switch.coffee

fs        = require 'fs'
formatter = require 'json-format'

PREF_FILE_PATH = '/Users/acetz/Library/Application Support/Sublime Text 3/Packages/User/Preferences.sublime-settings'
SCHEMES        =
  DARK         : 'Packages/Dayle Rees Color Schemes/legacy/LastNight.tmTheme'
  LIGHT        : 'Packages/Dayle Rees Color Schemes/sublime/light/userscape.tmTheme'
THEMES         =
  DARK         : 'Spacegray.sublime-theme'
  LIGHT        : 'Spacegray Light.sublime-theme'

prefFile = fs.readFileSync PREF_FILE_PATH

try
  prefJson = JSON.parse prefFile
  { color_scheme, theme } = prefJson

  newScheme = if color_scheme is SCHEMES.DARK then SCHEMES.LIGHT else SCHEMES.DARK
  newTheme  = if theme is THEMES.DARK then THEMES.LIGHT else THEMES.DARK

  prefJson.color_scheme = newScheme
  prefJson.theme        = newTheme

  fs.writeFileSync PREF_FILE_PATH, formatter prefJson, 'utf-8'

catch e
  console.log e
  console.log 'Failed to fetch and parse Sublime Preferences file.'

alias switch-sublime-theme="cd ~/Development/themeswitch ; coffee themeswitch.coffee -n; cd -"