From acdb391931d0c074ab2b6656163639bb04c4b1c4 Mon Sep 17 00:00:00 2001
From: Peter Josef Scheibel <scheibel1@llnl.gov>
Date: Fri, 18 May 2018 16:15:57 -0700
Subject: specs: add convenience function for reading spec dependencies from
 node dict

---
 lib/spack/spack/spec.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/spack/spack/spec.py b/lib/spack/spack/spec.py
index 8336a6f8a0..39dad67d2c 100644
--- a/lib/spack/spack/spec.py
+++ b/lib/spack/spack/spec.py
@@ -1558,6 +1558,15 @@ class Spec(object):
 
         return spec
 
+    @staticmethod
+    def dependencies_from_node_dict(node):
+        name = next(iter(node))
+        node = node[name]
+        if 'dependencies' not in node:
+            return
+        for t in Spec.read_yaml_dep_specs(node['dependencies']):
+            yield t
+
     @staticmethod
     def read_yaml_dep_specs(dependency_dict):
         """Read the DependencySpec portion of a YAML-formatted Spec.
-- 
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