ensure arrays are always sorted when exported to yaml

1 files changed, 29 insertions, 0 deletions

diff --git a/lib/core_ext/yaml.rb b/lib/core_ext/yaml.rb
new file mode 100644
index 0000000..bb0b5c9
--- /dev/null
+++ b/lib/core_ext/yaml.rb
@@ -0,0 +1,29 @@
+class Object
+  #
+  # ya2yaml will output hash keys in sorted order, but it outputs arrays
+  # in natural order. This new method, sorted_ya2yaml(), is the same as
+  # ya2yaml but ensures that arrays are sorted.
+  #
+  # This is important so that the .yaml files don't change each time you recompile.
+  #
+  # see https://github.com/afunai/ya2yaml/blob/master/lib/ya2yaml.rb
+  #
+  def sorted_ya2yaml(options = {})
+    # modify array
+    Array.class_eval do
+      alias_method :collect_without_sort, :collect
+      def collect(&block)
+        sorted = sort {|a,b| a.to_s <=> b.to_s}
+        sorted.collect_without_sort(&block)
+      end
+    end
+
+    # generate yaml
+    yaml_str = self.ya2yaml(options)
+
+    # restore array
+    Array.class_eval {alias_method :collect, :collect_without_sort}
+
+    return yaml_str
+  end
+end