Small updates to directives.

lib/spack/spack/directives.py

@@ -240,14 +240,12 @@ def patch(pkg, url_or_filename, **kwargs):
 
 
 @directive(dicts='variants')
-def variant(pkg, name, description="", **kwargs):
+def variant(pkg, name, description=""):
     """Define a variant for the package.  Allows the user to supply
        +variant/-variant in a spec.  You can optionally supply an
        initial + or - to make the variant enabled or disabled by defaut.
     """
-    return
+    if not re.match(r'^[-~+]?[A-Za-z0-9_][A-Za-z0-9_.-]*$', name):
-
-    if not re.match(r'[-~+]?[A-Za-z0-9_][A-Za-z0-9_.-]*', name):
         raise DirectiveError("Invalid variant name in %s: '%s'"
                              % (pkg.name, name))
 

lib/spack/spack/test/spec_semantics.py

@@ -71,7 +71,7 @@ def check_invalid_constraint(self, spec, constraint):
 
 
     # ================================================================================
-    # Satisfiability and constraints
+    # Satisfiability
     # ================================================================================
     def test_satisfies(self):
         self.check_satisfies('libelf@0.8.13', '@0:1')
@@ -96,6 +96,9 @@ def test_satisfies_compiler_version(self):
         self.check_unsatisfiable('foo@4.0%pgi', '@1:3%pgi')
         self.check_unsatisfiable('foo@4.0%pgi@4.5', '@1:3%pgi@4.4:4.6')
 
+        self.check_satisfies('foo %gcc@4.7.3', '%gcc@4.7')
+        self.check_unsatisfiable('foo %gcc@4.7', '%gcc@4.7.3')
+
 
     def test_satisfies_architecture(self):
         self.check_satisfies('foo=chaos_5_x86_64_ib', '=chaos_5_x86_64_ib')
@@ -147,7 +150,16 @@ def test_satisfies_virtual_dependency_versions(self):
         self.check_unsatisfiable('mpileaks^mpi@3:', '^mpich@1.0')
 
 
-    def test_constrain(self):
+    def test_satisfies_variant(self):
+        self.check_satisfies('foo %gcc@4.7.3', '%gcc@4.7')
+        self.check_unsatisfiable('foo %gcc@4.7', '%gcc@4.7.3')
+
+
+
+    # ================================================================================
+    # Constraints
+    # ================================================================================
+    def test_constrain_variants(self):
         self.check_constrain('libelf@2.1:2.5', 'libelf@0:2.5', 'libelf@2.1:3')
         self.check_constrain('libelf@2.1:2.5%gcc@4.5:4.6',
                              'libelf@0:2.5%gcc@2:4.6', 'libelf@2.1:3%gcc@4.5:4.7')
@@ -158,6 +170,8 @@ def test_constrain(self):
         self.check_constrain('libelf+debug~foo', 'libelf+debug', 'libelf~foo')
         self.check_constrain('libelf+debug~foo', 'libelf+debug', 'libelf+debug~foo')
 
+
+    def test_constrain_arch(self):
         self.check_constrain('libelf=bgqos_0', 'libelf=bgqos_0', 'libelf=bgqos_0')
         self.check_constrain('libelf=bgqos_0', 'libelf', 'libelf=bgqos_0')
 
@@ -170,8 +184,3 @@ def test_invalid_constraint(self):
         self.check_invalid_constraint('libelf+debug~foo', 'libelf+debug+foo')
 
         self.check_invalid_constraint('libelf=bgqos_0', 'libelf=x86_54')
-
-
-    def test_compiler_satisfies(self):
-        self.check_satisfies('foo %gcc@4.7.3', '%gcc@4.7')
-        self.check_unsatisfiable('foo %gcc@4.7', '%gcc@4.7.3')