Add possibility to skip css:build during assets:precompile (#99)

* Better: Add CSS_BUILD env var to skip css:build

* Change for SKIP_CSS_BUILD

* Fix single quotes

Co-authored-by: Yoann Lecuyer <yoann.lecuyer@ringcentral.com>
Co-authored-by: David Heinemeier Hansson <dhh@hey.com>

lib/tasks/cssbundling/build.rake

@@ -2,17 +2,19 @@ namespace :css do
   desc "Build your CSS bundle"
   task :build do
     unless system "yarn install && yarn build:css"
-      raise "cssbundling-rails: Command css:build failed, ensure yarn is installed and `yarn build:css` runs without errors"
+      raise "cssbundling-rails: Command css:build failed, ensure yarn is installed and `yarn build:css` runs without errors or use SKIP_CSS_BUILD env variable"
     end
   end
 end
 
-if Rake::Task.task_defined?("assets:precompile")
-  Rake::Task["assets:precompile"].enhance(["css:build"])
-end
+unless ENV["SKIP_CSS_BUILD"]
+  if Rake::Task.task_defined?("assets:precompile")
+    Rake::Task["assets:precompile"].enhance(["css:build"])
+  end
 
-if Rake::Task.task_defined?("test:prepare")
-  Rake::Task["test:prepare"].enhance(["css:build"])
-elsif Rake::Task.task_defined?("db:test:prepare")
-  Rake::Task["db:test:prepare"].enhance(["css:build"])
+  if Rake::Task.task_defined?("test:prepare")
+    Rake::Task["test:prepare"].enhance(["css:build"])
+  elsif Rake::Task.task_defined?("db:test:prepare")
+    Rake::Task["db:test:prepare"].enhance(["css:build"])
+  end
 end