Rename original_link_is_in_wheel_cache to is_wheel_from_cache

This more accurately reflects that it is not necessarily
related to original_link, original_link being the direct URL
link,
and the wheel cache can also be populated from sdists
URL discovered by the finder.

src/pip/_internal/operations/prepare.py

@@ -267,7 +267,7 @@ def __init__(
 
     def _log_preparing_link(self, req: InstallRequirement) -> None:
         """Provide context for the requirement being prepared."""
-        if req.link.is_file and not req.original_link_is_in_wheel_cache:
+        if req.link.is_file and not req.is_wheel_from_cache:
             message = "Processing %s"
             information = str(display_path(req.link.file_path))
         else:
@@ -288,7 +288,7 @@ def _log_preparing_link(self, req: InstallRequirement) -> None:
             self._previous_requirement_header = (message, information)
             logger.info(message, information)
 
-        if req.original_link_is_in_wheel_cache:
+        if req.is_wheel_from_cache:
             with indent_log():
                 logger.info("Using cached %s", req.link.filename)
 
@@ -499,7 +499,7 @@ def prepare_linked_requirement(
                     # original link, not the cached link. It that case the already
                     # downloaded file will be removed and re-fetched from cache (which
                     # implies a hash check against the cache entry's origin.json).
-                    warn_on_hash_mismatch=not req.original_link_is_in_wheel_cache,
+                    warn_on_hash_mismatch=not req.is_wheel_from_cache,
                 )
 
             if file_path is not None:
@@ -553,7 +553,7 @@ def _prepare_linked_requirement(
 
         hashes = self._get_linked_req_hashes(req)
 
-        if hashes and req.original_link_is_in_wheel_cache:
+        if hashes and req.is_wheel_from_cache:
             assert req.download_info is not None
             assert link.is_wheel
             assert link.is_file
@@ -576,7 +576,7 @@ def _prepare_linked_requirement(
                     "and re-downloading source."
                 )
                 # For some reason req.original_link is not set here, even though
-                # req.original_link_is_in_wheel_cache is True. So we get the original
+                # req.is_wheel_from_cache is True. So we get the original
                 # link from download_info.
                 req.link = Link(req.download_info.url)  # TODO comes_from?
                 link = req.link

src/pip/_internal/req/req_install.py

@@ -108,7 +108,10 @@ def __init__(
             # PEP 508 URL requirement
             link = Link(req.url)
         self.link = self.original_link = link
-        self.original_link_is_in_wheel_cache = False
+
+        # When is_wheel_from_cache is True, it means that this InstallRequirement
+        # is a local wheel file in the cache of locally built wheels.
+        self.is_wheel_from_cache = False
 
         # Information about the location of the artifact that was downloaded . This
         # property is guaranteed to be set in resolver results.

src/pip/_internal/resolution/legacy/resolver.py

@@ -431,7 +431,7 @@ def _populate_link(self, req: InstallRequirement) -> None:
         if cache_entry is not None:
             logger.debug("Using cached wheel link: %s", cache_entry.link)
             if req.link is req.original_link and cache_entry.persistent:
-                req.original_link_is_in_wheel_cache = True
+                req.is_wheel_from_cache = True
             if cache_entry.origin is not None:
                 req.download_info = cache_entry.origin
             else:

src/pip/_internal/resolution/resolvelib/candidates.py

@@ -278,7 +278,7 @@ def __init__(
 
         if cache_entry is not None:
             if cache_entry.persistent and template.link is template.original_link:
-                ireq.original_link_is_in_wheel_cache = True
+                ireq.is_wheel_from_cache = True
             if cache_entry.origin is not None:
                 ireq.download_info = cache_entry.origin
             else:

tests/unit/test_req.py

@@ -411,7 +411,7 @@ def test_download_info_archive_legacy_cache(
             reqset = resolver.resolve([ireq], True)
             assert len(reqset.all_requirements) == 1
             req = reqset.all_requirements[0]
-            assert req.original_link_is_in_wheel_cache
+            assert req.is_wheel_from_cache
             assert req.download_info
             assert req.download_info.url == url
             assert isinstance(req.download_info.info, ArchiveInfo)
@@ -437,7 +437,7 @@ def test_download_info_archive_cache_with_origin(
             reqset = resolver.resolve([ireq], True)
             assert len(reqset.all_requirements) == 1
             req = reqset.all_requirements[0]
-            assert req.original_link_is_in_wheel_cache
+            assert req.is_wheel_from_cache
             assert req.download_info
             assert req.download_info.url == url
             assert isinstance(req.download_info.info, ArchiveInfo)