Add downloaded/local archive path to InstallRequirement

src/pip/_internal/operations/install/wheel.py

@@ -28,7 +28,9 @@
 from pip._internal.exceptions import InstallationError, UnsupportedWheel
 from pip._internal.locations import get_major_minor_version
 from pip._internal.utils.misc import captured_stdout, ensure_dir, hash_file
+from pip._internal.utils.temp_dir import TempDirectory
 from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.unpacking import unpack_file
 
 if MYPY_CHECK_RUNNING:
     from typing import (
@@ -618,6 +620,30 @@ def is_entrypoint_wrapper(name):
     shutil.move(temp_record, record)
 
 
+def install_wheel(
+    name,  # type: str
+    wheel_path,  # type: str
+    scheme,  # type: Scheme
+    req_description,  # type: str
+    pycompile=True,  # type: bool
+    warn_script_location=True,  # type: bool
+    _temp_dir_for_testing=None,  # type: Optional[str]
+):
+    # type: (...) -> None
+    with TempDirectory(
+        path=_temp_dir_for_testing, kind="unpacked-wheel"
+    ) as unpacked_dir:
+        unpack_file(wheel_path, unpacked_dir.path)
+        install_unpacked_wheel(
+            name=name,
+            wheeldir=unpacked_dir.path,
+            scheme=scheme,
+            req_description=req_description,
+            pycompile=pycompile,
+            warn_script_location=warn_script_location,
+        )
+
+
 def wheel_version(source_dir):
     # type: (Optional[str]) -> Optional[Tuple[int, ...]]
     """Return the Wheel-Version of an extracted wheel, if possible.

src/pip/_internal/operations/prepare.py

@@ -143,7 +143,7 @@ def unpack_http_url(
     download_dir=None,  # type: Optional[str]
     hashes=None,  # type: Optional[Hashes]
 ):
-    # type: (...) -> None
+    # type: (...) -> str
     temp_dir = TempDirectory(kind="unpack", globally_managed=True)
     # If a download dir is specified, is the file already downloaded there?
     already_downloaded_path = None
@@ -171,6 +171,8 @@ def unpack_http_url(
     ):
         _copy_file(from_path, download_dir, link)
 
+    return from_path
+
 
 def _copy2_ignoring_special_files(src, dest):
     # type: (str, str) -> None
@@ -219,7 +221,7 @@ def unpack_file_url(
     download_dir=None,  # type: Optional[str]
     hashes=None  # type: Optional[Hashes]
 ):
-    # type: (...) -> None
+    # type: (...) -> Optional[str]
     """Unpack link into location.
 
     If download_dir is provided and link points to a file, make a copy
@@ -233,7 +235,7 @@ def unpack_file_url(
         _copy_source_tree(link_path, location)
         if download_dir:
             logger.info('Link is a directory, ignoring download_dir')
-        return
+        return None
 
     # If --require-hashes is off, `hashes` is either empty, the
     # link's embedded hash, or MissingHashes; it is required to
@@ -267,6 +269,8 @@ def unpack_file_url(
     ):
         _copy_file(from_path, download_dir, link)
 
+    return from_path
+
 
 def unpack_url(
     link,  # type: Link
@@ -275,7 +279,7 @@ def unpack_url(
     download_dir=None,  # type: Optional[str]
     hashes=None,  # type: Optional[Hashes]
 ):
-    # type: (...) -> None
+    # type: (...) -> Optional[str]
     """Unpack link.
        If link is a VCS link:
          if only_download, export into download_dir and ignore location
@@ -293,14 +297,15 @@ def unpack_url(
     # non-editable vcs urls
     if link.is_vcs:
         unpack_vcs_link(link, location)
+        return None
 
     # file urls
     elif link.is_file:
-        unpack_file_url(link, location, download_dir, hashes=hashes)
+        return unpack_file_url(link, location, download_dir, hashes=hashes)
 
     # http urls
     else:
-        unpack_http_url(
+        return unpack_http_url(
             link,
             location,
             downloader,
@@ -500,7 +505,7 @@ def prepare_linked_requirement(
                 download_dir = self.wheel_download_dir
 
             try:
-                unpack_url(
+                local_path = unpack_url(
                     link, req.source_dir, self.downloader, download_dir,
                     hashes=hashes,
                 )
@@ -515,6 +520,11 @@ def prepare_linked_requirement(
                     'error {} for URL {}'.format(req, exc, link)
                 )
 
+            # For use in later processing, preserve the file path on the
+            # requirement.
+            if local_path:
+                req.local_file_path = local_path
+
             if link.is_wheel:
                 if download_dir:
                     # When downloading, we only unpack wheels to get

src/pip/_internal/req/req_install.py

@@ -27,7 +27,7 @@
     generate_metadata as generate_metadata_legacy
 from pip._internal.operations.install.editable_legacy import \
     install as install_editable_legacy
-from pip._internal.operations.install.wheel import install_unpacked_wheel
+from pip._internal.operations.install.wheel import install_wheel
 from pip._internal.pyproject import load_pyproject_toml, make_pyproject_path
 from pip._internal.req.req_uninstall import UninstallPathSet
 from pip._internal.utils.deprecation import deprecated
@@ -137,6 +137,10 @@ def __init__(
             # PEP 508 URL requirement
             link = Link(req.url)
         self.link = self.original_link = link
+        # Path to any downloaded or already-existing package.
+        self.local_file_path = None  # type: Optional[str]
+        if self.link and self.link.is_file:
+            self.local_file_path = self.link.file_path
 
         if extras:
             self.extras = extras
@@ -770,9 +774,10 @@ def install(
             return
 
         if self.is_wheel:
-            install_unpacked_wheel(
+            assert self.local_file_path
+            install_wheel(
                 self.name,
-                self.source_dir,
+                self.local_file_path,
                 scheme=scheme,
                 req_description=str(self.req),
                 pycompile=pycompile,

src/pip/_internal/wheel_builder.py

@@ -460,6 +460,7 @@ def build(
                         )
                         # Update the link for this.
                         req.link = Link(path_to_url(wheel_file))
+                        req.local_file_path = req.link.file_path
                         assert req.link.is_wheel
                         # extract the wheel into the dir
                         unpack_file(req.link.file_path, req.source_dir)

tests/unit/test_wheel.py

@@ -260,7 +260,6 @@ def prep(self, data, tmpdir):
         self.req = Requirement('sample')
         self.src = os.path.join(tmpdir, 'src')
         self.dest = os.path.join(tmpdir, 'dest')
-        unpack_file(self.wheelpath, self.src)
         self.scheme = Scheme(
             purelib=os.path.join(self.dest, 'lib'),
             platlib=os.path.join(self.dest, 'lib'),
@@ -290,9 +289,9 @@ def assert_installed(self):
 
     def test_std_install(self, data, tmpdir):
         self.prep(data, tmpdir)
-        wheel.install_unpacked_wheel(
+        wheel.install_wheel(
             self.name,
-            self.src,
+            self.wheelpath,
             scheme=self.scheme,
             req_description=str(self.req),
         )
@@ -309,9 +308,9 @@ def test_install_prefix(self, data, tmpdir):
             isolated=False,
             prefix=prefix,
         )
-        wheel.install_unpacked_wheel(
+        wheel.install_wheel(
             self.name,
-            self.src,
+            self.wheelpath,
             scheme=scheme,
             req_description=str(self.req),
         )
@@ -330,11 +329,12 @@ def test_dist_info_contains_empty_dir(self, data, tmpdir):
             self.src_dist_info, 'empty_dir', 'empty_dir')
         os.makedirs(src_empty_dir)
         assert os.path.isdir(src_empty_dir)
-        wheel.install_unpacked_wheel(
+        wheel.install_wheel(
             self.name,
-            self.src,
+            self.wheelpath,
             scheme=self.scheme,
             req_description=str(self.req),
+            _temp_dir_for_testing=self.src,
         )
         self.assert_installed()
         assert not os.path.isdir(