Fix error caused by weakly referenced package not specifying version …

…range (#1712)

Signed-off-by: loonghao <hal.long@outlook.com>

src/rez/data/tests/solver/packages/test_weakly_reference_requires/2.0/package.py

@@ -0,0 +1,4 @@
+name = "test_weakly_reference_requires"
+version = "2.0"
+
+requires = ["~test_variant_split_mid1", "~test_variant_split_mid2"]

src/rez/data/tests/solver/packages/test_weakly_reference_variant/2.0/package.py

@@ -0,0 +1,6 @@
+name = "test_weakly_reference_variant"
+version = "2.0"
+
+requires = ["~pyfoo"]
+
+variants = [["test_variant_split_mid1", "~test_variant_split_mid2-1..3"]]

src/rez/package_order.py

@@ -116,8 +116,9 @@ def sort_key(self, package_name, version_like):
 
         Args:
             package_name: (str) The family name of the package we are sorting
-            version_like: (Version|_LowerBound|_UpperBound|_Bound|VersionRange)
-                the version-like object you wish to generate a key for
+            version_like: (Version|_LowerBound|_UpperBound|_Bound|VersionRange|None)
+                The version-like object to be used as a basis for generating a sort key.
+                Note that 'None' is also a supported value, which maintains the default sorting order.
 
         Returns:
             Sortable object
@@ -126,21 +127,26 @@ def sort_key(self, package_name, version_like):
         """
         if isinstance(version_like, VersionRange):
             return tuple(self.sort_key(package_name, bound) for bound in version_like.bounds)
-        elif isinstance(version_like, _Bound):
+        if isinstance(version_like, _Bound):
             return (self.sort_key(package_name, version_like.lower),
                     self.sort_key(package_name, version_like.upper))
-        elif isinstance(version_like, _LowerBound):
+        if isinstance(version_like, _LowerBound):
             inclusion_key = -2 if version_like.inclusive else -1
             return self.sort_key(package_name, version_like.version), inclusion_key
-        elif isinstance(version_like, _UpperBound):
+        if isinstance(version_like, _UpperBound):
             inclusion_key = 2 if version_like.inclusive else 1
             return self.sort_key(package_name, version_like.version), inclusion_key
-        elif isinstance(version_like, Version):
+        if isinstance(version_like, Version):
             # finally, the bit that we actually use the sort_key_implementation for.
             return FallbackComparable(
                 self.sort_key_implementation(package_name, version_like), version_like)
-        else:
-            raise TypeError(version_like)
+        if version_like is None:
+            # As no version range is provided for this package,
+            # Python's sort preserves the order of equal elements.
+            # Thus, to maintain the original order,
+            # we return the same object for all None values.
+            return 0
+        raise TypeError(version_like)
 
     def sort_key_implementation(self, package_name, version):
         """Returns a sort key usable for sorting these packages within the

src/rez/tests/test_completion.py

@@ -52,7 +52,8 @@ def _eq(prefix, expected_completions):
         _eq("", ["bahish", "nada", "nopy", "pybah", "pydad", "pyfoo", "pymum",
                  "pyodd", "pyson", "pysplit", "python", "pyvariants",
                  "test_variant_split_start", "test_variant_split_mid1",
-                 "test_variant_split_mid2", "test_variant_split_end", "missing_variant_requires"])
+                 "test_variant_split_mid2", "test_variant_split_end", "missing_variant_requires",
+                 "test_weakly_reference_requires", "test_weakly_reference_variant"])
         _eq("py", ["pybah", "pydad", "pyfoo", "pymum", "pyodd", "pyson",
             "pysplit", "python", "pyvariants"])
         _eq("pys", ["pyson", "pysplit"])

src/rez/tests/test_packages.py

@@ -58,7 +58,9 @@
     'timestamped-1.0.5', 'timestamped-1.0.6', 'timestamped-1.1.0', 'timestamped-1.1.1',
     'timestamped-1.2.0', 'timestamped-2.0.0', 'timestamped-2.1.0', 'timestamped-2.1.5',
     'multi-1.0', 'multi-1.1', 'multi-1.2', 'multi-2.0',
-    'missing_variant_requires-1'
+    'missing_variant_requires-1',
+    'test_weakly_reference_requires-2.0',
+    'test_weakly_reference_variant-2.0',
 ])
 
 

src/rez/tests/test_solver.py

@@ -256,6 +256,23 @@ def test_12_missing_variant_requires(self):
         config.override("error_on_missing_variant_requires", False)
         self._solve(["missing_variant_requires"], ["nada[]", "missing_variant_requires-1[1]"])
 
+    def test_13_resolve_weakly_reference_requires(self):
+        """Test resolving a package with a weakly referenced requirement."""
+        self._solve(["test_weakly_reference_requires", "test_variant_split_mid2-2"],
+                    ['test_weakly_reference_requires-2.0[]',
+                     'test_variant_split_end-3.0[0]',
+                     'test_variant_split_mid2-2.0[1]'])
+
+    def test_14_resolve_weakly_reference_variant(self):
+        """Test resolving a package with a weakly referenced variant."""
+        self._solve(["test_weakly_reference_variant-2.0", "test_variant_split_mid2-2", "pyfoo"],
+                    ['test_variant_split_end-1.0[1]',
+                     'test_variant_split_mid1-1.0[1]',
+                     'test_weakly_reference_variant-2.0[0]',
+                     'test_variant_split_mid2-2.0[0]',
+                     'python-2.6.8[]',
+                     'pyfoo-3.1.0[]'])
+
 
 if __name__ == '__main__':
     unittest.main()