resolver.py: Fix is_satisfied_by()

is_satisfied_by() returns false if a requirement is defined without a
specifier.  For example using 'aotriton' (no other arguments) results in a
failure regardless of any constraint specified.  In this case it is safe
to return True and return a tested value for the constraint.

Fix is_satisfied_by() to handle requirements without specifiers.

Signed-off-by: Prarit Bhargava <[email protected]>

Author: prarit

src/fromager/resolver.py

@@ -320,9 +320,14 @@ def is_satisfied_by(self, requirement: Requirement, candidate: Candidate) -> boo
         allow_prerelease = self.constraints.allow_prerelease(requirement.name) or bool(
             requirement.specifier.prereleases
         )
-        return requirement.specifier.contains(
-            candidate.version, prereleases=allow_prerelease
-        ) and self.constraints.is_satisfied_by(requirement.name, candidate.version)
+        reqbool = True
+        if len(requirement.specifier) == 1:
+            reqbool = requirement.specifier.contains(
+                candidate.version, prereleases=allow_prerelease
+            )
+        return reqbool and self.constraints.is_satisfied_by(
+            requirement.name, candidate.version
+        )
 
     def get_dependencies(self, candidate: Candidate) -> list[Requirement]:
         # return candidate.dependencies