Merge pull request #4 from codequest-eu/feature/soft-failure

Add an option to softly fail a pipe

codequest_pipes.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name    = 'codequest_pipes'
-  spec.version = '0.2.0'
+  spec.version = '0.2.1'
 
   spec.author      = 'codequest'
   spec.email       = '[email protected]'

lib/codequest_pipes/context.rb

@@ -32,14 +32,22 @@ def add(values)
       end
     end
 
+    # Quietly fail the pipe, allowing the error to be saved and accessed from
+    # the Context.
+    #
+    # @param error [Any] Error to be set.
+    def halt(error = 'Execution stopped')
+      @error = error
+    end
+
     # Explicitly fail the pipe, allowing the error to be saved and accessed from
     # the Context.
     #
     # @param error [Any] Error to be set.
     #
     # @raise [ExecutionTerminated]
     def terminate(error)
-      @error = error
+      halt(error)
       fail ExecutionTerminated, error
     end
 

lib/codequest_pipes/pipe.rb

@@ -20,10 +20,10 @@ def self.|(other)
     end
 
     def self.call(ctx)
+      return ctx if ctx.error
       _validate_ctx(_required_context_elements, ctx)
       new(ctx).call
       _validate_ctx(_provided_context_elements, ctx)
-      ctx
     end
 
     def self.require_context(*args)