Merge pull request #793 from tiran/resolver-cache

fix(resolver): redesign resolver cache

Author: mergify[bot]

docs/hooks.rst

@@ -156,14 +156,15 @@ Resolver hooks
 
         from fromager import resolver
 
-        VERSION_MAP = {'1.0': 'first-release', '2.0': 'second-release'}
+        VERSIONS = {
+            "https://pkg.example/pkg-1.0.tar.gz": "1.0",
+            "https://pkg.example/pkg-2.0.tar.gz": "2.0",
+        }
 
         def _version_source(
                 identifier: str,
-                requirements: resolver.RequirementsMap,
-                incompatibilities: resolver.CandidatesMap,
-            ) -> typing.Iterable[Version]:
-            return VERSION_MAP.keys()
+            ) -> typing.Iterable[tuple[str, Version]]:
+            return VERSIONS.items()
 
 
         def get_resolver_provider(ctx, req, include_sdists, include_wheels, sdist_server_url):

src/fromager/bootstrapper.py

@@ -901,9 +901,11 @@ def _resolve_from_version_source(
             return None
         try:
             # no need to pass req type to enable caching since we are already using the graph as our cache
+            # do not cache candidates
             provider = resolver.GenericProvider(
-                version_source=lambda x, y, z: version_source,
+                version_source=lambda identifier: version_source,
                 constraints=self.ctx.constraints,
+                use_resolver_cache=False,
             )
             return resolver.resolve_from_provider(provider, req)
         except Exception as err: