Add script to automate releases more easily.

Gemfile

@@ -11,3 +11,4 @@ gem "rubocop"
 gem "rubocop-rake"
 gem "rubocop-rspec"
 gem "simplecov", require: false, group: :test
+gem "tty-prompt"

Rakefile

@@ -2,6 +2,7 @@
 
 require "bundler/gem_tasks"
 require "rspec/core/rake_task"
+require "tty-prompt"
 
 RSpec::Core::RakeTask.new(:spec)
 
@@ -19,3 +20,17 @@ task :test_swift do
   end
   FileUtils.rm_rf("tests")
 end
+
+desc "Sets lib version to the semantic version given, and push it to remote."
+task :bump, [:v] do |t, args|
+  version = args[:v] || raise("A version is required. Pass it like `rake bump[1.2.3]`")
+  next unless TTY::Prompt.new.yes?("Would you like to set the new version of the app to be '#{version}'?")
+  version_filename = "lib/arkana/version.rb"
+  version_file_contents = File.read(version_filename)
+  new_version_file_contents = version_file_contents.gsub(/VERSION = \"(?:.*)\"/, "VERSION = \"#{version}\"")
+  File.open(version_filename, "w") {|file| file.puts new_version_file_contents }
+  sh("bundle install")
+  sh("git add #{version_filename} Gemfile.lock")
+  sh("git commit -m 'Bump app version to v#{version}.'")
+  sh("git push origin")
+end