updated rake release task

Rakefile

@@ -12,7 +12,7 @@ task default: :test
 namespace :cim do
   desc 'Tags, updates README, and CHANGELOG and pushes to Github. Requires ruby-git'
   task :release do
-    tasks = ['cim:assert_clean_repo', 'cim:git_fetch', 'cim:assert_version', 'cim:update_readme', 'cim:update_changelog', 'cim:commit_changes', 'cim:tag']
+    tasks = ['cim:assert_clean_repo', 'cim:git_fetch', 'cim:set_new_version', 'cim:update_readme', 'cim:update_changelog', 'cim:commit_changes', 'cim:tag']
     begin
       tasks.each { |task| Rake::Task[task].invoke }
       `git push && git push origin '#{RedisRds::VERSION}'`
@@ -24,17 +24,17 @@ namespace :cim do
   desc 'Fails if the current repository is not clean'
   task :assert_clean_repo do
     status = `git status -s`.chomp.strip
-    if status.empty?
+    if status.strip.empty?
       status = `git log origin/master..HEAD`.chomp.strip # check if we have unpushed commits
-      if status.empty?
+      if status.strip.empty?
         puts '>>> Repository is clean!'
       else
         puts '>>> Please push your committed changes before releasing!'
-        exit -1
+        exit(-1)
       end
     else
       puts '>>> Please stash or commit your changes before releasing!'
-      exit -1
+      exit(-1)
     end
   end
 
@@ -44,14 +44,35 @@ namespace :cim do
     `git fetch --tags`
   end
 
-  desc 'Fails if the current gem version is not greater than the last tag'
-  task :assert_version do
-    latest = `git describe --abbrev=0`.chomp.strip
-    current = RedisRds::VERSION
+  desc 'Requests the new version number'
+  task :set_new_version do
+    STDOUT.print(">>> New version number (current: #{RedisRds::VERSION}; leave blank if already updated): ")
+    input = STDIN.gets.strip.tr("'", "\'")
+
+    current = if input.empty?
+      RedisRds::VERSION
+    else
+      unless input =~ /[0-9]+\.[0-9]+\.[0-9]+/
+        puts '>>> Please use semantic versioning!'
+        exit(-1)
+      end
 
+      input
+    end
+
+    latest = `git describe --abbrev=0`.chomp.strip
     unless Gem::Version.new(current) > Gem::Version.new(latest)
       puts ">>> Latest tagged version is #{latest}; make sure gem version (#{current}) is greater!"
-      exit -1
+      exit(-1)
+    end
+
+    if !input.empty?
+      `sed -i -u "s@VERSION = '#{RedisRds::VERSION}'@VERSION = '#{input}'@" #{File.expand_path('../lib/redis_rds/version.rb', __FILE__)}`
+      $VERBOSE = nil
+      RedisRds.const_set('VERSION', input)
+      $VERBOSE = false
+
+      `bundle check` # force updating version
     end
   end
 
@@ -72,10 +93,13 @@ namespace :cim do
     changelog = File.open('.CHANGELOG.md', 'w')
     changelog.write("# Changelog\n\n###{RedisRds::VERSION}\n\n#{log}\n\n")
     File.open('CHANGELOG.md', 'r') do |file|
-      file.readline # skip first two lines
-      file.readline
-      while buffer = file.read(2048)
-        changelog.write(buffer)
+      begin
+        file.readline # skip first two lines
+        file.readline
+        while buffer = file.read(2048)
+          changelog.write(buffer)
+        end
+      rescue => error
       end
     end
 
@@ -92,7 +116,7 @@ namespace :cim do
   desc 'Creates and pushes the tag to git'
   task :tag do
     puts '>>> Tagging'
-    message = STDOUT.print '>>> Please enter a tag message: '
+    STDOUT.print('>>> Please enter a tag message: ')
     input = STDIN.gets.strip.tr("'", "\'")
     `git tag -a '#{RedisRds::VERSION}' -m '#{input}'`
   end