From 2507ccc3d13a0155261cde0210d51a1f8e44601d Mon Sep 17 00:00:00 2001
From: Marcin Wyszynski <marcin.pixie@gmail.com>
Date: Wed, 24 Feb 2016 12:42:48 +0100
Subject: [PATCH] Add an option to softly fail a pipe

---
 codequest_pipes.gemspec        |  2 +-
 lib/codequest_pipes/context.rb | 10 +++++++++-
 lib/codequest_pipes/pipe.rb    |  2 +-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/codequest_pipes.gemspec b/codequest_pipes.gemspec
index 8e11dc1..8c7bfec 100644
--- a/codequest_pipes.gemspec
+++ b/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       = 'hello@codequest.com'
diff --git a/lib/codequest_pipes/context.rb b/lib/codequest_pipes/context.rb
index dc12cda..17adc4d 100644
--- a/lib/codequest_pipes/context.rb
+++ b/lib/codequest_pipes/context.rb
@@ -32,6 +32,14 @@ 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.
     #
@@ -39,7 +47,7 @@ def add(values)
     #
     # @raise [ExecutionTerminated]
     def terminate(error)
-      @error = error
+      halt(error)
       fail ExecutionTerminated, error
     end
 
diff --git a/lib/codequest_pipes/pipe.rb b/lib/codequest_pipes/pipe.rb
index 5e1add5..d2eff11 100644
--- a/lib/codequest_pipes/pipe.rb
+++ b/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)